The invention relates to a sheet steel component (10) for a working device of a working machine, which sheet steel component has at least one receptacle (14) for a bearing element, in particular a receptacle (14) for a bolt. According to the invention, the at least one receptacle (14) is formed as a region of the sheet steel component (10) that surrounds the circumference of an opening (18), wherein said region has a sheet metal portion (20) having a sheet metal thickness d and a drawn collar (22) which adjoins the sheet metal portion (20) and extends in the axial direction (24) of the opening (18). The invention further relates to a use of the sheet steel component as a device component of a working device of a working machine, to a device unit for a working device of a working machine, having at least one sheet steel component (10) of this kind, and to a corresponding method for producing a sheet steel component (10) for a working device of a working machine having a receptacle (14) for a bearing element.
B21D 19/08 - Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
B21D 28/26 - Perforating, i.e. punching holes in sheets or flat parts
B21D 28/28 - Perforating, i.e. punching holes in tubes or other hollow bodies
C21D 1/00 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
B21D 35/00 - Combined processes according to methods covered by groups
B21D 22/28 - Deep-drawing of cylindrical articles using consecutive dies
B21D 53/10 - Making other particular articles parts of bearingsMaking other particular articles sleevesMaking other particular articles valve seats or the like
2.
STEEL AND DEVICE CREATED THEREWITH FOR BALLISTIC PROTECTION OF LIVING THINGS, MACHINERY AND EQUIPMENT, AND/OR BUILDINGS
The invention relates to a use of a steel as a material for ballistic protection of living things and/or machinery and equipment and/or buildings, said steel having a tensile strength of > 780 MPa. According to the invention, said steel is a multi-phase steel having a hardness of < 330 HB and consisting of (in wt.%) C: 0.08 to 0.35, Mn: 0.80 to 3.50, Mo: 0.10 to 1.00, optionally one or more of the following elements: N: 0.0020 to 0.0160, S: up to 0.020, Cr: 0.050 to 1.0, P: up to 0.050, Cu: 0.001 to 1.0, Si: 0.05 to 1.5, Al: 0.0030 to 1.0, Ni: 0.03 to 1.50, Nb: 0.005 to 0.150, Ti: 0.005 to 0.150, V: 0.001 to 0.300, B: 0.0005 to 0.0050, and Ca: 0.0005 to 0.0060, the remainder iron and unavoidable impurities, and having a microstructure in which the sum of the volume percentages of the microstructure constituents martensite, tempered martensite, retained austenite, M/A phase, upper bainite and/or lower bainite is at least 30.0 volume percent and in which the remaining microstructure consists of ferrite and pearlite, the volume percentage of the microstructure constituent ferrite in the microstructure being at least 20.0 volume percent. The invention also relates to a device for ballistic protection of living things and/or machinery and equipment and/or buildings, comprising at least one planar component which comprises, at in a region of ballistic protective effect, at least one steel layer made of a steel having a tensile strength of > 780 MPa, said steel being a corresponding multi-phase steel having a hardness of < 330 HB.
A method of producing a hot dip-coated high-strength steel strip with plasticity brought about by microstructural transformation starting from producing a hot-rolled steel strip, etching and optionally cold rolling the hot-rolled steel strip to give a cold-rolled steel strip, subsequently continuously annealing in a continuous process of hot dip coating the cold- or hot-rolled steel strip, subsequently cooling the cold- or hot-rolled steel strip to an intermediate temperature, subsequently further cooling the cold- or hot-rolled steel strip from the intermediate temperature to a cooling stop temperature within a temperature range and at an average cooling rate, and then keeping the temperature within a temperature range, then hot dip coating the cold- or hot-rolled steel strip, and cooling the hot dip coated cold- or hot-rolled steel strip at an average cooling rate to ambient temperature. The corresponding hot dip-coated high-strength steel strip thus has plasticity brought about by microstructural transformation.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
The invention relates to a method for producing direct reduced iron from material (20) containing iron ore by means of direct reduction using at least one reduction gas in a reactor (16) of a direct reduction plant (12). In the method, the reduction gas or at least one of the reduction gases is produced by means of in-situ reformation in the reactor (16). According to the invention, direct reduced iron material (22) is also fed to the reactor (16) in addition to the material (20) containing iron ore, at least when the corresponding direct reduction process is started up. The invention also relates to a direct reduction plant (12) for producing direct reduced iron from material (20) containing iron ore by means of direct reduction using at least one reduction gas in a reactor (16) of the direct reduction plant (12).
The invention relates to a method for processing a residue mixture (12) containing the elements iron and/or calcium for industrial use by at least partially separating at least one volatile element, in particular a volatile element from the following list of elements: Zn, Pb, Na, K, Cl, S, F and P, from this residue mixture (12) in a furnace (14), wherein this residue mixture (12) is in the form of a granular residue mixture or at least comprises a granular fraction. According to the invention, the furnace (14) is designed as a rotary furnace or rotary kiln (16) and a process gas having a hydrogen fraction of more than 5 vol.%, in particular of more than 50 vol.%, is fed to the rotary furnace or rotating kiln (16) for the processing of the residue mixture (12). The invention further relates to a corresponding computer program product, which prompts a processor to carry out the method, and to a corresponding processing plant (10) for processing a residue mixture (12) containing the elements iron and/or calcium for industrial use.
The invention relates to a steel production plant (10) with a furnace assembly (32), which in turn comprises an electrically operated furnace (16) for smelting feedstocks (20, 22) of different types of material for steel production, and a feed system (18) for feeding at least a part of the feedstocks (20, 22) as a material flow via at least one feed access (56, 58) into the interior (50) of the electrically operated furnace (16), and having a direct reduction device (14) for producing sponge iron. According to the invention, the feed system (18) is designed as a feed system (18) for independently feeding at least two material flows of feedstocks (20, 22) of different material types via the feed access or feed accesses (56, 58) into the interior (50) of the furnace (16), and the feedstocks (20, 22) of different material types fed as independent material streams comprise both scrap (20) as feedstock (20) of a first of these material types and the sponge iron and/or the material based on sponge iron (22) as feedstock (22) of a second of these material types. The invention further relates to a corresponding method for feeding feedstocks (20, 22) of different material types into the interior (50) of an electrically operated furnace (16) for smelting these feedstocks (20, 22) for the production of steel.
C22B 1/00 - Preliminary treatment of ores or scrap
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
CoilCoil above the dew point T of the ambient atmosphere, and - applying a corrosion-protection fluid (34), in particular a corrosion-protection oil, to the end faces (24, 26) of the coil (12) provided, to form in each case a fluid barrier (32) from the corrosion-protection fluid (34) that has penetrated into a respective peripheral region (38, 40) of the gap (30) and prevents, or at least reduces, penetration of moisture from the ambient atmosphere into a central middle region (42), adjoining the peripheral regions (38, 40), of the gap (30). The invention also relates to a device for creating temporary corrosion protection for a corresponding coil (12) and to a coil unit (10) with a corresponding coil (12) and fluid barriers (32) at the end faces (24, 26) of the coil (12), which prevent penetration of moisture from the ambient atmosphere into a central middle region (42) of a gap (30) between adjacent steel-strip layers (28) of the coil (12).
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
B05B 1/00 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
B05B 13/00 - Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups
B05B 12/00 - Arrangements for controlling deliveryArrangements for controlling the spray area
B05D 7/00 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
C23F 11/00 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
8.
DIRECT REDUCTION DEVICE FOR PRODUCING SPONGE IRON, AND METHOD FOR FEEDING PARTICLES CONTAINING IRON ORE INTO THE REACTOR OF A DIRECT REDUCTION DEVICE OF THIS KIND
The invention relates to a direct reduction device (10) for producing sponge iron, in particular for an integrated steel-producing plant, comprising a reactor (12) and a feed device (14) arranged above the reactor (12) for feeding particles (16, 18) containing iron ore into the reactor (12) via a plurality of feed inlets (20, 22), wherein a central longitudinal axis (26) of the reactor (12) extends from the top (24) to the bottom end (28) of the reactor (12), and the feed inlets (20, 22) are arranged at the top (24) of the reactor (12), wherein at least some of these feed inlets (22) are distributed around the longitudinal axis (26). According to the invention, at least one of the feed inlets (20) is a feed inlet (20) close to the axis, the distance of which from the longitudinal axis (26) is smaller than the distance of at least one of the other feed inlets (22). The invention also relates to a corresponding method for feeding particles containing iron ore into the reactor (12) of a direct reduction device (10) of this kind.
A steel strip made of a high-strength multiphase steel with a tensile strength of at least 780 MPa in the longitudinal direction and consists of the following elements in % by weight: 0.08≤C≤0.23, 1.5≤Mn≤3.5, 0.25≤Si+Al≤2, 0.0020≤N≤0.0160, P<0.05, S<0.01. Cu<0.20; iron; and a carbon equivalent CEV which is greater than 0.49 and smaller than 0.9, wherein the carbon equivalent CEV results from the contents of the corresponding elements in % by weight according to the following formula: CEV=C+Mn/6 (Cu+Ni)/15+(Cr+Mo+V)/5 and wherein the ratio of the carbon equivalent CEV and the sum of the contents of Si and Al in % by weight is less than 2.3, wherein the multiphase steel constituents martensite, tempered martensite, residual austenite, upper bainite and/or lower bainite where the sum of the volume fractions of the microstructure is at least 30% by volume, and residual microstructure consists of ferrite and perlite.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C21D 1/18 - HardeningQuenching with or without subsequent tempering
m11 of 0.5 to 100 K/s and subsequently holding the temperature in the temperature range from 250°C to 450°C for 30 to 600 s and optionally subsequently performing hot-dip coating of the cold-rolled steel strip at a temperature between 380 and 500°C in the context of the continuous hot-dip coating process, and (v) subsequently performing final cooling of the continuously annealed, cold-rolled steel strip to ambient temperature at an average cooling rate of 2 K/s to 100 K/s in order to create the high-strength flat steel product. The invention also relates to a corresponding high-strength flat steel product.
The present disclosure provides a high-strength hot-rolled flat steel product and a method of producing such a product. This is achieved by a high-strength hot-rolled flat steel product with high local cold formability, having a tensile strength Rm of at least 760 MPa, a yield point ratio of at least 0.8 and a hole expansion ratio of at least 30%, an elongation at break of at least 10, a measure of cold formability of at least 0.12, and a ratio of local and global cold formability of at least 5 and at most 13, and a microstructure consisting of more than 50% by volume of bainite and up to 10% by volume, of carbon-rich microstructure constituents
The invention relates to a composition for coating metal surfaces, comprising a binding agent which comprises a phenolic resin, an epoxy resin, in particular phenoxy resin, a polyester resin (soft resin) and a polyisocyanate, further comprising at least one conductive pigment, a corrosion resistant pigment and a solvent. The coating layer obtained from the composition by drying is corrosion-resistant, non-flammable, forming-compatible and weldable.
A method for producing a component from a blank made of a medium manganese steel having 4 to 12 wt. % Mn and a TRIP effect at room temperature, in which method the blank is mechanically cut to make a prepared blank having the desired dimensions, cut edges are produced on the prepared blank by means of mechanical cutting, and the prepared blank with the cut edges is cold-formed to obtain the component at room temperature or at a temperature above room temperature but below 60° C. The method is distinguished by cost-effective production, improved formability with reduced cracking at the formed cut edges, while simultaneously reducing the forming forces. The mechanical cutting is performed at a pre-heating temperature in the range of 60° C. to less than 250° C.
1211 and not more than 150 K/s, and then keeping the temperature within a temperature range between 200°C and 450°C, especially between 280°C and 450°C, for 25 to 500 s, (vi) then hot dip coating the cold- or hot-rolled steel strip at a temperature between 380 and 500°C and (vii) then cooling the hot dip coated cold- or hot-rolled steel strip at an average cooling rate of 1 K/s to 50 K/s to ambient temperature. The invention further relates to a corresponding hot dip-coated high-strength steel strip with plasticity brought about by microstructural transformation.
The invention relates to a method for the laser overlap welding of at least two high-strength flat steel products (12, 14), each of which has a tensile strength of more than 800 MPa and which have surfaces (18, 20; 22, 24) provided with lubricant and/or an anti-corrosive agent, said method having the steps of: - providing the flat steel products (12, 14) in an overlapping arrangement, in which the flat steel products (12, 14) are laid one over the other, - at least partly removing the lubricant and/or anti-corrosive agent in an overlap region (42) of the flat steel products (12, 14), said overlap region being provided for the overlap welding, and - subsequently carrying out an overlap welding of the flat steel products (12, 14) by irradiating a surface of a first flat steel product (12) of the flat steel products (12, 14) with a laser beam (36) in the overlap region (42), said surface facing outwards. In contrast to the lubricant and/or anti-corrosive agent on the mutually facing inner surfaces (20, 22) of the flat steel products (12, 14), the lubricant and/or anti-corrosive agent on the first flat steel product (12) surface (18) facing outwards is removed prior to the overlap welding process at least in a surface region (44) which comprises the welded connection (16) that is subsequently produced by the overlap welding process. In addition to the aforementioned method, the invention also relates to a corresponding flat steel composite (10) comprising at least two flat steel products (12, 14), each of which has a tensile strength greater than 800 MPa and surfaces (18, 20, 22, 24) provided with lubricant and/or an anti-corrosive agent and which are welded together in an overlapping geometry by means of a laser overlap welding process.
A method for producing a steel strip with a multiphase structure by which the production of complex geometries with a high energy-absorption capacity and high resistance to edge cracking is provided achieving a high yield strength or high yield-strength ratio and a high elongation at break, comprising producing a rolled steel strip of particular elements, and first annealing the steel strip at a temperature of between 750° C. and 950° C., and subsequently first cooling of the steel strip to a temperature of between 200° C. and 500° C. at an average cooling rate of 2 K/s to 150 K/s, further cooling of the steel strip to a supercooling temperature below 100° C. at an average cooling rate of 1 K/s to 50 K/s, final annealing of the steel strip with a Hollomon-Jaffe parameter, and final cooling of the steel strip to room temperature at an average cooling rate of 1 K/s to 160 K/s.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
18.
METHOD FOR PRODUCING A FLAT STEEL PRODUCT HAVING A ZINC- OR ALUMINIUM-BASED METAL COATING AND CORRESPONDING FLAT STEEL PRODUCT
The invention relates to a method for producing a flat steel product (10) having a flat steel base (12) and a zinc- or aluminium-based metal coating (14) on at least one surface (16) of the flat steel base (12), said flat steel base (12) being produced from a steel containing one or more of the elements having an affinity for oxygen in wt.%: Al: more than 0.01, Cr: more than 0.1, Mn: more than 1.0, Si: more than 0.05. A metal layer containing tin is applied to the surface (16), then the flat steel base (12) with the metal layer is annealed and afterwards the flat steel base (12) with the zinc- or aluminium-based metal coating (14) which has been coated and annealed in this way is hot-dip galvanised. A tin-iron alloy layer having a tin component of ≥ 5 wt.% and ≤ 81 wt.% is applied as a metal layer containing tin. The invention also relates to a method for producing a flat steel product (10) having a flat steel base (12) and a zinc- or aluminium-based metal coating (14) on at least one surface (16) of the flat steel base (12), and to a use of a flat steel product (10) of this type for producing parts for motor vehicles.
C23C 16/00 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
B32B 15/00 - Layered products essentially comprising metal
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
19.
METHOD FOR PRODUCING A PRESS-HARDENED SHEET STEEL PART HAVING AN ALUMINIUM-BASED COATING, INITIAL SHEET METAL BLANK, AND A PRESS-HARDENED SHEET STEEL PART MADE THEREFROM
A method for producing a press-mold-hardened part includes providing a steel strip having an aluminium-based coating; applying an inorganic, iron-containing conversion layer to the aluminium-based coating with a layer weight in relation to iron of 3-30 mg/m2; cold-rolling the steel strip to form a flexibly rolled strip with strip sections of different sheet thickness; cutting an initial sheet metal blank out of the flexibly rolled strip, with the blank having different sheet thicknesses with thinnest and thickest sheet sections; press-mold-hardening the initial sheet metal blank to form a part. Alternatively, the cold-rolling can take place before the cutting, and the application of the conversion layer can take place before or after the cutting, or, instead of the cold-rolling, at least two steel strip sections having an aluminium-based coating and different sheet thicknesses can be welded together, where the application of the conversion layer can take place before or after welding.
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
B21D 35/00 - Combined processes according to methods covered by groups
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
20.
STEEL STRIP MADE OF A HIGH-STRENGTH MULTIPHASE STEEL AND PROCESS FOR PRODUCING SUCH A STEEL STRIP
The invention relates to a steel strip made of a high-strength multiphase steel which has a tensile strength of at least 780 MPa in the longitudinal direction, the multiphase steel consisting of the following elements in % by weight: C ≥ 0.08 to ≤ 0.23, Mn ≥ 1.5 to ≤ 3.5, Si + Al ≥ 0.25 to ≤ 2, N ≥ 0.0020 to ≤ 0.0160, P < 0.05, S < 0.01, Cu < 0.20, optionally one or more of the following elements: Ca ≥ 0.0005 to ≤ 0.0060, Cr ≥ 0.05 to ≤ 1.0, Mo ≥ 0.05 to ≤ 1.0, Ni ≥ 0.05 to ≤ 0.50, Nb ≥ 0.005 to ≤ 0.15, Ti ≥ 0.005 to ≤ 0.15, V ≥ 0.001 to ≤ 0.30 and B ≥ 0.0005 to ≤ 0.0050, balance: iron, including customary steel-accompanying impurities resulting from melting, and having a carbon equivalent CEV which is greater than 0.49 and smaller than 0.9, preferably greater than 0.49 and smaller than 0.75, wherein the carbon equivalent CEV results from the contents of the corresponding elements in % by weight according to the following formula: CEV = C + Mn/6 + (Cu + Ni)/15 + (Cr + Mo + V)/5 and wherein the ratio of the carbon equivalent CEV and the sum of the contents of Si and Al in % by weight is less than 2.3, wherein the multiphase steel has a microstructure where the sum of the volume fractions of the microstructure constituents martensite, tempered martensite, residual austenite, upper bainite and/or lower bainite is at least 30% by volume, and the residual microstructure consists of ferrite and perlite. The invention further relates to a process for producing such a steel strip.
It is an object of the present invention to provide a high-strength hot-rolled flat steel product and a method of producing such a flat steel product, and hence to achieve, based on the steel, a combination of high strength with simultaneously high local cold formability and high economic viability. This is achieved by a high-strength hot-rolled flat steel product with high local cold formability, having a tensile strength Rm of at least 760 MPa, a yield point ratio of at least 0.8 and a hole expansion ratio of at least 30%, advantageously at least 40%, particularly advantageously at least 50%, an elongation at break of at least 10%, preferably at least 16%, a measure of cold formability of at least 0.12, advantageously at least 0.17, and a ratio of local and global cold formability of at least 5 and at most 13, and a microstructure consisting of more than 50% by volume of bainite and up to 10% by volume, advantageously up to 5% by volume, of carbon-rich microstructure constituents such as martensite, residual austenite, perlite, residual precipitation-hardened ferrite, with the following chemical composition of the steel (in % by weight): C: 0.04 to 0.08; Si: 0.1 to 0.6; Mn: 1.0 to 2.0; P: max. 0.06; S: max. 0.01; N: max. 0.012; Al: up to 0.06; Ti: up to 0.18 and/or Nb: up to 0.08; Mo: up to 0.35; with Ti+Nb more than 0.06, where there is a superstoichiometric proportion of carbon and nitrogen according to the following formula: 1.0 < (C/12+N/14) / (Ti/48+Nb/93+Mo/96), balance: iron including unavoidable steel-accompanying elements.
C23C 2/06 - Zinc or cadmium or alloys based thereon
22.
STEEL MATERIAL FOR A TORSIONALLY STRESSED COMPONENT, METHOD FOR PRODUCING A TORSIONALLY STRESSED COMPONENT FROM SAID STEEL MATERIAL, AND COMPONENT MADE THEREOF
A steel material for a torsionally stressed component, such as a driveshaft, having a minimum tensile strength of 800 MPs, and the microstructure consists of more than 50 vol. % of bainite, having an alloy with the following composition in wt. %: C: 0.02 to 0.3; Si: up to 0.7; Mn: 1.0 to 3.0; P: max. 0.02; S: max. 0.01; N: max. 0.01; Al: up to 0.1; Cu: up to 0.2; Cr: up to 3.0; Ni: up to 0.3; Mo: up to 0.5; Ti: up to 0.2; V: up to 0.2; Nb: up to 0.1; B: up to 0.01; where 0.02≤Nb+V+Ti≤0.25, residual iron, and smelting impurities. The steel material is inexpensive and has good torsional fatigue strength when used for a torsionally stressed component. The invention also relates to a method for producing a component made of the material and to such a component.
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
A welded component having mechanical properties in a welding seam region comparable or better to those in the non-influenced base material via a method including producing a hot-rolled steel product made of a high-strength air-hardenable steel with a material thickness of at least 1.5 mm having a chemical composition by mass in one embodiment of: C: 0.03 to 0.4; Mn: 1.0 to 4.0; Si: 0.09 to 2.0; Al: 0.02 to 2.0; P<=0.1; S<=0.1; N: 0.001 to 0.5; Ti: 0.01 to 0.2; Cr: 0.05 to 2.0; B: 0.001 to 0.1; Mo: 0.01 to 1.0; V: 0.01 to 0.2; optionally: Ni: 0.02 to 1.0; Nb: 0.01 to 0.1; and residual iron including conventional steel-accompanying elements, subsequently air hardening the produced hot-rolled steel product, then deforming the hot-rolled steel product in the air-hardened state to form a component, and producing welding connections using a fusion welding process on the component.
The invention relates to a method for producing a component from a blank made of a medium manganese steel having 4 to 12 wt.% Mn and a TRIP effect at room temperature, in which method the blank is mechanically cut to make a prepared blank having the desired dimensions, cut edges are produced on the prepared blank by means of mechanical cutting, and the prepared blank with the cut edges is cold-formed to obtain the component at room temperature or at a temperature above room temperature but below 60°C. The method is distinguished by cost-effective production, improved formability with reduced cracking at the formed cut edges, while simultaneously reducing the forming forces. According to the invention, the mechanical cutting is performed at a pre-heating temperature in the range of 60°C to less than 250°C.
C21D 7/10 - Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 9/48 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals deep-drawing sheets
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
B21D 22/00 - Shaping without cutting, by stamping, spinning, or deep-drawing
B21D 35/00 - Combined processes according to methods covered by groups
25.
METHOD FOR PRODUCING A STEEL STRIP WITH IMPROVED BONDING OF METALLIC HOT-DIP COATINGS
A cold-rolled or hot-rolled steel strip having a metal coating, the steel strip having iron as the main constituent and, in addition to carbon, an Mn content of 4.1 to 8.0 wt. % and optionally one or more of the alloy elements Al, Si, Cr, B, Ti, V, Nb and/or Mo. The surface of the uncoated steel strip is cleaned, a layer of pure iron is applied to the cleaned surface, an oxygen-containing iron-based layer is applied to the layer of pure iron and contains more than five mass percent oxygen. The steel strip is then annealed and, to attain a surface consisting substantially of metallic iron, is subjected to a reduction treatment in a reducing furnace while being annealed. The steel strip is then coated with the metallic coating by hot dipping. Uniform and reproducible adhesion conditions are hereby achieved for the metallic coating on the steel strip surface.
An aluminum-based coating of a flat steel product is applied in a hot-dipping method and comprises a mass percentage of silicon within a given range. The coating for a flat steel product, in particular for press mold hardening components, offers a shortened required minimum oven dwell time and a sufficiently large processing window when heating in an oven. This is achieved in that the surface of the coating has a degree of absorption for thermal radiation ranging between 0.35 and 0.95 prior to an annealing treatment, where the degree of absorption relates to an oven temperature ranging from 880 to 950° C. during the austenitizing annealing treatment. The invention additionally relates to an improved method for producing a flat steel product with an aluminum-based coating, to an inexpensive method for producing press-hardened components from such flat steel products, and to a press-hardened component made of such flat steel products.
C25D 11/04 - Anodisation of aluminium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 9/48 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals deep-drawing sheets
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
B32B 3/00 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form
C25D 11/06 - Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
In order to provide a method which is intended for producing a steel strip with a multiphase structure and by which the production of complex geometries with a high energy-absorption capacity and high resistance to edge cracking is made possible, in particular compensating for the drop in yield strength, and consequently achieving a combination of a high yield strength or high yield-strength ratio and a high elongation at break, it is proposed that the method comprises the following steps: - producing a hot- or cold-rolled steel strip from a steel consisting of the following elements in % by weight: C: from 0.085 bis 0.149; Al: from 0.005 to 0.1; Si: from 0.2 to 0.75; Mn: 1.6 to 2.9; N: < 0.02; S: ≤ 0.005 and optionally of one or more of the following elements in % by weight: Cr: 0.05 to 0.5; Mo: 0.05 to 0.5; Ti: 0.005 to 0.060; Nb: 0.005 to 0.060; V: 0.001 to 0.060; B: 0.0001 to 0.0060; N: 0.0001 to 0.016; Ni: 0.01 to 0.5; Cu: 0.01 to 0.3; the remainder iron, including customary steel-accompanying elements, - first annealing, in particular continuous annealing, of the steel strip, in particular the cold-rolled steel strip, at a temperature of between 750°C and 950°C, inclusive, for the entire duration of 10 s to 1200 s, in particular from 50 s to 650 s, and subsequently first cooling of the steel strip to a temperature of between 200°C and 500°C, inclusive, at an average cooling rate of 2 K/s to 150 K/s, in particular of 5 K/s to 100 K/s, - further cooling of the steel strip to a supercooling temperature below 100°C at an average cooling rate of 1 K/s to 50 K/s, - final annealing, in particular continuous annealing, of the steel strip with a Hollomon-Jaffe parameter Hp = TH * (ln (Ʈ) +20) of > 7.5 x 103, where the maximum temperature TH in K is 100°C to 470°C, inclusive, and the total duration Ʈ in h is 2 s up to 1000 s, inclusive, and - final cooling of the steel strip to room temperature at an average cooling rate of 1 K/s to 160 K/s, in particular of 1 K/s to 30 K/s. The invention also relates to a steel strip with a multiphase structure, produced by this method.
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 1/19 - HardeningQuenching with or without subsequent tempering by interrupted quenching
C21D 1/25 - Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
28.
METAL SHEET HAVING ADHESION-PROMOTER COATING AS SEMI-FINISHED PRODUCT FOR THE MANUFACTURE OF METAL-THERMOPLASTIC COMPOSITE COMPONENTS, AND METHOD FOR PRODUCING A METAL SHEET OF THIS TYPE
The invention relates to a metal sheet having an adhesion-promoter coating (2) as a semi-finished product for the manufacture of metal-thermoplastic composite components, comprising a metal-containing metal sheet (1) and an adhesion-promoter coating (2), wherein a titanium-containing and/or zirconium-containing conversion layer (3) is arranged between the metal sheet (1) and the adhesion-promoter coating (2). The invention further relates to a method for producing the metal sheet (1) having an adhesion-promoter coating (2) and to the use of said metal sheet as a semi-finished product for the manufacture of metal-thermoplastic composite components.
C23C 22/36 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing fluorides or complex fluorides containing also phosphates
C23C 22/62 - Treatment of iron or alloys based thereon
C23C 22/78 - Pretreatment of the material to be coated
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
06 - Common metals and ores; objects made of metal
12 - Land, air and water vehicles; parts of land vehicles
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Common metals and their alloys, including having coatings of artificial resins, plastics and/or metals; Organically coated steel sheets, in particular for the manufacture of sandwich elements, trapezoidal profiles, garage doors, caravans, traffic signs, jalousies, control cabinets, laboratory ovens, furniture, shelves, air conditioning apparatus, roof profiles, wall profiles, box profiles, lights, utility vehicle superstructures, household appliances, facades and roofs; Building materials of metal; Buildings, transportable, of metal; Steel, unwrought or semi-wrought; Steel alloys; Steel strip; constructions and construction structures made of metal; Metallic mountings; Tanks of metal, Containers of metal [storage, transport]; Sheets and plates of metal; Roofing of metal; Sectional steel; Beams of metal; Sheet piles of metal; Metallic sheet piles; Wall structures of metal; Roof structures of metal; Trapezoidal sheeting and cassette profiles of metal. Structural components for vehicles being manufactured from steel alloys, steel sheets and steel strips and optionally being coated on one or both sides with metal or plastic. Tempering of metal (treatment of metal); Metal treating; Colour coating; Coating of metals (treatment of materials); Metal casting; Metal plating; Laminating; Galvanization; Metal tempering; Material treatment information.
30.
Method for producing a steel strip with improved bonding of metallic hot-dip coatings
A method for producing a steel strip containing, in addition to iron as the main component and unavoidable impurities, one or more of the following oxygen-affine elements in wt. %: Al: more than 0.02, Cr: more than 0.1, Mn: more than 1.3 or Si: more than 0.1, where the surface of the steel strip is cleaned, oxidation-treated and annealed. The treated and annealed steel strip is subsequently coated with a hot-dip coat. In order to be less cost-intensive and to achieve uniform, reproducible adhesion conditions for the coat, the steel strip is oxidation-treated prior to the annealing at temperatures below 200° C., where on the surface of the steel strip, with the formation of oxides with iron from the steel strip, an oxide layer is formed, which contains iron oxide and is reduction-treated during the course of the annealing under a reducing atmosphere to achieve a surface consisting substantially of metallic iron.
C21D 9/573 - Continuous furnaces for strip or wire with cooling
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
31.
METHOD FOR PRODUCING A PRESS-HARDENED SHEET STEEL PART HAVING AN ALUMINIUM-BASED COATING, INITIAL SHEET METAL BLANK, AND A PRESS-HARDENED SHEET STEEL PART MADE THEREFROM
The invention relates to a method for producing a press-mould-hardened part, comprising the following steps: - providing a steel strip having an aluminium-based coating; applying an inorganic, iron-containing conversion layer to the aluminium-based coating with a layer weight in relation to iron of 3-30 mg/m2; - cold-rolling the steel strip to form a flexibly rolled strip with strip sections of different sheet thickness; - cutting an initial sheet metal blank out of the flexibly rolled strip, the initial sheet metal blank having different sheet thicknesses with a thinnest and a thickest sheet section; - press-mould-hardening the initial sheet metal blank to form a part. Alternatively, the cold-rolling can take place before the cutting, and the application of the conversion layer can take place before or after the cutting, or, instead of the cold-rolling, at least two steel strip sections which have an aluminium-based coating and different sheet thicknesses can be welded together, and the application of the conversion layer can take place before or after the welding together.
B21D 26/053 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
B21D 35/00 - Combined processes according to methods covered by groups
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor characterised by the coating material
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
32.
STEEL MATERIAL FOR A TORSIONALLY STRESSED COMPONENT, METHOD FOR PRODUCING A TORSIONALLY STRESSED COMPONENT FROM SAID STEEL MATERIAL, AND COMPONENT MADE THEREOF
The invention relates to a steel material for a torsionally stressed component, in particular a driveshaft, wherein the steel material has a minimum tensile strength of 800 MPs, and the microstructure consists of more than 50 vol.% of bainite, having an alloy with the following composition in wt.%: C: 0.02 to 0.3; Si: up to 0.7; Mn: 1.0 to 3.0; P: max. 0.02; S: max. 0.01; N: max. 0.01; Al: up to 0.1; Cu: up to 0.2; Cr: up to 3.0; Ni: up to 0.3; Mo: up to 0.5; Ti: up to 0.2; V: up to 0.2; Nb: up to 0.1; B: up to 0.01; where 0.02 ≤ Nb + V + Ti ≤ 0.25, residual iron, and smelting impurities. The steel material is inexpensive and has a good torsional fatigue strength when used for a torsionally stressed component. The invention also relates to a method for producing a component made of the steel material and to a component made thereof.
B21C 1/00 - Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
B21C 37/06 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of tubes or metal hosesCombined procedures for making tubes, e.g. for making multi-wall tubes
B21C 37/30 - Finishing tubes, e.g. sizing, burnishing
B21D 3/00 - Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
C21D 7/02 - Modifying the physical properties of iron or steel by deformation by cold working
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
High-strength, hot-rolled flat steel product with high edge cracking resistance and, at the same time, high bake-hardening potential, and method for producing such a flat steel product
A flat product of steel with yield strength Rp 0.2 of 660 to 820 MPa, BH2 value greater than 30 MPa, a hole expansion ratio greater than 30%, and a microstructure having a first main component at a proportion of at least 50%, including one or more individual components of ferrite, tempered bainite, and tempered martensite, each with less than 5% carbides, and a second main component at a proportion of 5% to 50%, including one or more individual components of martensite, residual austenite, bainite or perlite, with the steel having a following chemical composition (in weight %): C: 0.04 to 0.12; Si: 0.03 to 0.8; Mn: 1 to 2.5: P: max. 0.08; S: max. 0.01; N: max. 0.01; Al: up to 0.1; Ni+Mo; up to 0.5; Nb: up to 0.08; Ti: up to 0.2; Nb+Ti: min, 0.03; Cr: up to 0.6; the remainder being iron including unavoidable steel-associated elements.
The invention relates to a method for producing a hot-rolled strip composed of a bainitic multi-phase steel and having a Zn—Mg—Al coating, comprising the following steps: melting a steel melt containing (in weight percent): C: 0.04-0.11, Si: <=0.7, Mn: 1.4-2.2, Mo: 0.05-0.5, Al: 0.015-0.1, P: up to 0.02, S: up to 0.01, B: up to 0.006, and at least one element from the group Nb, V, Ti in accordance with the following condition: 0.02<=Nb+V+Ti<=0.20, the remainder being iron including unavoidable steel-accompanying elements resulting from the melting process, casting the steel melt into a preliminary material, in particular a slab or a block or a thin slab, hot rolling the preliminary material into a hot-rolled strip having a final rolling temperature in the range of 800 to 950° C., cooling the hot-rolled strip to a winding temperature less than 650° C., winding the hot-rolled strip at a winding temperature less than 650° C., cooling the wound hot-rolled strip to room temperature in still air, wherein the microstructure of the wound hot-rolled strip then has a bainite fraction greater than 50% after the hot rolling, heating the hot-rolled strip to a temperature greater than 650° C. and less than Ac3, in particular less than Ac1+50° C., cooling the hot-rolled strip to zinc bath temperature, hot-dip coating the heated hot-rolled strip in a zinc alloy molten bath containing (in weight percent): Al: 1.0-2.0, Mg: 1.0-2.0, the remainder being zinc and unavoidable impurities. The invention further relates to the hot-rolled strip produced in accordance with the method above and to shaped, dynamically highly loadable components, in particular motor vehicle parts, that are produced from said hot-roiled strip and that are resistant to corrosive and abrasive influences.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
G09G 3/3208 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
The invention relates to a method for producing a welded component (1). The aim of the invention is to provide a method with which mechanical properties are achieved in the welding seam region, in particular fatigue strength, comparable to those in the non-influenced base material, preferably even with a higher degree of strength than in the base material. This is achieved in that the method has the following steps: - producing a hot-rolled steel product (2, 3) made of a high-strength air-hardenable steel with a material thickness of at least 1.5 mm, wherein the hot-rolled steel product (2, 3) has the following chemical composition by mass: C: 0.03 to 0.4, preferably 0.06 to 0.12, particularly preferably 0.08 to 0.10; Mn: 1.0 to 4.0, preferably 1.80 to 2.20, particularly preferably 1.80 to 2.00; Si: 0.09 to 2.0, preferably 0.22 to 0.34, particularly preferably 0.25 to 0.30; Al: 0.02 to 2.0, preferably 0.02 to 0.06, particularly preferably 0.02 to 0.05; P <=0.1, preferably ≤ 0.020; S <=0.1, preferably ≤ 0.010; N: 0.001 to 0.5, preferably 0.0030 to 0.0125, particularly preferably 0.0030 to 0.0080; Ti: 0.01 to 0.2, preferably 0.010 to 0.050, particularly preferably 0.020 to 0.030; Cr: 0.05 to 2.0, preferably 0.60 to 1.0, particularly preferably 0.70 to 0.80; B: 0.001 to 0.1, preferably 0.0015 to 0.0060, particularly preferably 0.0025 to 0.0035; Mo: 0.01 to 1.0, preferably 0.10 to ≤ 0.40, particularly preferably 0.15 to 0.30; V: 0.01 to 0.2, preferably 0.05 to ≤ 0.09, particularly preferably 0.05 to 0.08; optionally: Ni: 0.02 to 1.0; Nb: 0.01 to 0.1; residual iron including conventional steel-accompanying elements, - subsequently air hardening the produced hot-rolled steel product (2, 3), - then deforming the hot-rolled steel product (2, 3) in the air-hardened state in order to form a component, and - producing welding connections using a fusion welding process on the component. The invention also relates to a welded component (1) produced in this manner.
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
B23K 9/23 - Arc welding or cutting taking account of the properties of the materials to be welded
The invention relates to a method for producing a cold- or hot-rolled steel strip with a metallic coating, the steel strip having iron as the main constituent and, in addition to carbon, an Mn content of 8.1 to 25.0 wt.% and optionally one or more of the alloying elements Al, Si, Cr, B, Ti, V, Nb and/or Mo, wherein the surface of the uncoated steel strip is first cleaned, a layer of pure iron is applied to the cleaned surface, an oxygen-containing, iron-based layer containing more than mass percent of oxygen is applied to the layer of pure iron, the steel strip with the oxygen-containing, iron-based layer is then annealed and is reduction-treated in a reducing furnace atmosphere during the annealing treatment in order to obtain a surface consisting mainly of metallic iron, and the steel strip thus treated and annealed is then hot-dip coated with the metallic coating. This creates uniform and reproducible bonding conditions for the coating on the steel strip surface. Furthermore, the invention relates to a steel strip with a metallic coating applied by hot dipping and the use of such a steel strip.
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor characterised by the coating material
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C25D 3/20 - ElectroplatingBaths therefor from solutions of iron
C25D 3/22 - ElectroplatingBaths therefor from solutions of zinc
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
37.
METHOD FOR PRODUCING A STEEL STRIP WITH IMPROVED BONDING OF METALLIC HOT-DIP COATINGS
The invention relates to a method for producing a cold-rolled or hot-rolled steel strip having a metal coating, the steel strip comprising iron as the main constituent and, in addition to carbon, an Mn content of 4.1 to 8.0 wt.% and optionally one or more of the alloy elements Al, Si, Cr, B, Ti, V, Nb and/or Mo, wherein the surface of the uncoated steel strip is cleaned, a layer of pure iron is applied to the cleaned surface, an oxygen-containing iron-based layer is applied to the layer of pure iron and contains more than mass percent oxygen, the steel strip with the oxygen-containing iron-based layer is then subjected to an annealing treatment, and, in order to attain a surface consisting substantially of metallic iron, is subjected to a reduction treatment in a reducing furnace atmosphere during the course of the annealing treatment, and then the steel strip thus treated and annealed is coated with the metallic coating by hot dipping. Uniform and reproducible adhesion conditions are hereby achieved for the metallic coating on the steel strip surface. The invention also relates to a steel strip having a metallic coating applied by means of hot dipping, and to the use of such a steel strip.
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor characterised by the coating material
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C25D 3/20 - ElectroplatingBaths therefor from solutions of iron
C25D 3/22 - ElectroplatingBaths therefor from solutions of zinc
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
38.
Component made of press-form-hardened, aluminum-based coated steel sheet, and method for producing such a component
2]+(19/7). Formed on the inter-diffusion zone I is a zone having various intermetallic phases having an average total thickness between 8 and 50 μm, on which zone there is in turn arranged a covering layer containing aluminum oxide and/or hydroxide having an average thickness of at least 0.05 μm to at most 5 μm.
B32B 15/10 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of wood
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
The invention relates to a steel product made of lightweight steel containing manganese, having a minimum notched bar impact work at -40 °C in the transverse direction of ≥ 20 Joules, preferably at least 30 Joules, having the following chemical composition in wt.%: C: 0.1 to 1.8, preferably 0.3 to 1.5; Mn: 15 to 35, preferably 20 to 30; Al: 6 to 12, preferably 7 to 10; Si: 0.2 to 1.5, preferably 0.5 to 1.2; Mo: 0.1 to 1.2, preferably 0.5 to 1.1; V: 0.05 to 0.5, preferably 0.07 to 0.3; Nb: 0.01 to 0.5, preferably 0.05 to 0.3; Cr: 0.05 to 3, preferably 0.1 to 2; Ni; 0.05 to 3, preferably 0.1 to 2; P: < 0.04; S: < 0.02; N: < 0.02; remainder iron, including unavoidable elements accompanying steel, together with the optional addition of one or more of the following elements: Ti, Cu, B, Co, W, Zr, Ca and Sn, having a joint consisting of at least 40 vol.% austenite, less than 60 vol.% ferrite, remainder martensite and/or carbides up to 2%, consisting of kappa carbides and/or vanadium carbides and/or niobium carbides and/or molybdenum carbides having a good combination of strength, distension and forming properties. The invention further relates to a method for producing a steel product in the form of a flat steel product made from the aforementioned lightweight steel containing manganese.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
The invention relates to a method for coating a steel sheet or steel strip to which an aluminium-based coating is applied in a dip-coating process and the surface of the coating is freed of a naturally occurring aluminium oxide layer. In order to provide a low-cost method for coating steel sheets or steel strips that makes the steel sheets or steel strips outstandingly suitable for the production of components by means of press hardening and for the further processing thereof, it is proposed that transition metals or transition metal compounds are subsequently deposited on the freed surface of the coating to form a top layer. The invention also relates to a method for producing press-hardened components from the aforementioned steel sheets or steel strips with an aluminium-based coating.
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
The invention relates to an aluminum-based coating of a flat steel product. The coating comprises an aluminum-based coating which is applied in a hot-dipping method and comprises 1.8 to 15 mass.% of silicon, preferably 5 to 13 mass.% of silicon, more preferably 8 to 11 mass.% of silicon. The aim of the invention is to provide an aluminum-based coating for a flat steel product, in particular for press mold hardening components, said coating offering a shortened required minimum oven dwell time and a sufficiently large processing window when heating in an oven. This is achieved in that the surface of the coating has a degree of absorption for thermal radiation ranging between 0.35 and 0.95 prior to an annealing treatment, wherein the degree of absorption relates to an oven temperature ranging from 880 to 950 °C during the austenitizing annealing treatment. The invention additionally relates to an improved method for producing a flat steel product with an aluminum-based coating, to an inexpensive method for producing press-hardened components from such flat steel products, and to a press-hardened component made of such flat steel products.
The invention relates to a sheet metal blank for producing a heat-shaped and press-hardened steel sheet component (7) in a heat-shaping method, wherein, in a heat treatment step, the sheet metal blank (6) is heat-treated to above the material-specific austenitizing temperature Ac3; in an inserting step, the heat-treated sheet metal blank (6) is inserted into a shaping die (3); in a press-hardening step, the sheet metal blank (6) is heat-shaped and cooled, forming the sheet metal component (7), which, in a removal step, is removed from the opened shaping die (3), wherein the sheet metal blank (6) has, as a base material (10), a hardenable steel having a metallic scale protection coating on both sides. According to the invention, the metallic scale protection coating is formed as a copper layer (11). In the heat treatment step, the copper layer (11) converts into an electrically conductive copper oxide layer (13) bonded to the steel base material (10).
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
B21D 22/02 - Stamping using rigid devices or tools
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
C25D 5/50 - After-treatment of electroplated surfaces by heat-treatment
C25D 7/00 - Electroplating characterised by the article coated
43.
INTERIOR HIGH PRESSURE-FORMED COMPONENT MADE OF STEEL, USE OF A STEEL FOR PRECURSORS FOR PRODUCING AN INTERIOR HIGH PRESSURE-FORMED COMPONENT, AND PRECURSOR THEREFOR
The invention relates to an interior high pressure-formed component made of ferritic-bainitic steel, characterized by a precursor having at least 5 volume-% bainite, which has a composition containing 0.04-0.12 wgt.-% C, 0.8-2.0 wgt.-% Mn, ≤ 0.60 wgt.-% Si, ≤ 0.02 wgt.-% P, ≤ 0.01 wgt.-% S, 0.01-0.08 wgt.-% Al, < 0.008 wgt.-% B, ≤ 0.3 wgt.-% Cu, ≤ 0.6 wgt.-% Cr, ≤ 0.3 wgt.-% Ni, ≤ 0.3 wgt.-% Mo, ≤ 0.1 wgt.-% Ti, ≤ 0.1 wgt.-% V, and ≤ 0.06 wgt.-% Nb, the remainder iron and routine contaminants due to melting and a total proportion of Nb and/or V and/or Ti in the composition of at least 0.02 wgt.-%.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C21D 7/12 - Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C21D 9/50 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for welded joints
B21B 37/26 - Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
44.
METHOD AND SYSTEM FOR DYNAMICALLY VISUALIZING STRUCTURAL DEFORMATIONS IN A CONTINUOUS CASTING SYSTEM
The invention relates to a method for dynamically visualizing structural deformations in a continuous casting system which has different measurement points arranged on components of the system, the temperature of each component being measured at the position of the measurement point. A three-dimensional temperature distribution model for the entire continuous casting system is generated on the basis of the measurement values determined at the different measurement points of the continuous casting system, and the temperature distribution model is used to read the temperature at any position of the continuous casting system. A structural deformation within the continuous casting system is ascertained and visualized using the finite element method and using the temperature measurement values determined at the different measurement points of the continuous casting system.
B22D 11/16 - Controlling or regulating processes or operations
G01B 21/32 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
45.
Method for the production of chassis parts from micro-alloyed steel with improved cold formability
The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: —providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent, cutting a blank at room temperature and optionally carrying out further punching or cutting operations, —heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700° C. with a dwell time of at most 10 seconds and subsequent cooling with air, —cold forming the blank in one or more steps to form a chassis part at room temperature.
An ultra-high-strength air-hardenable multiphase steel having minimal tensile strengths in a non air hardened state of 950 MPa and excellent processing properties, includes the following elements in % by weight: C≥0.075 to ≤0.115; Si≥0.400 to ≤0.500; Mn≥1,900 to ≤2,350; Cr≥0.200 to ≤0.500; Al≥0.005 to ≤0.060; N≥0.0020 to ≤0.0120; S≤0.0030; Nb≥0.005 to ≤0.060; Ti≥0.005 to ≤0.060; B≥0.0005 to ≤0.0030; Mo≥0.200 to ≤0.300; Ca≥0.0005 to ≤0.0060; Cu≤0.050; Ni≤0.050; remainder iron, including usual steel accompanying smelting related impurities, wherein for a widest possible process window during continuous annealing of hot rolled or cold rolled strips made from said steel a sum content of M+Si+Cr in said steel is a function of a thickness of the steel strips according to the following relationship: for strip thicknesses of up to 1.00 mm the sum content of M+Si+Cr is ≥2.800 and ≤3.000%, for strip thicknesses of over 1.00 to 2.00 mm the sum of Mn+Si+Cr is ≥2.850 and ≤3.100%, and for strip thicknesses of over 2.00 mm the sum of Mn+Si+Cr is ≥2.900 and ≤3.200%.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
The invention relates to a steel strip for producing a non-oriented electrical steel. To achieve greatly improved frequency-independent magnetic properties, in particular greatly reduced hysteresis losses, in comparison with known electrical steels, the following alloy composition in wt % is proposed: C: ≤0.03, Al: 1 to 12, Si: 0.3 to 3.5, Mn: >0.25 to 10, Cu: >0.05 to 3.0, Ni: >0.01 to 5.0, total of N, S and P: at most 0.07, remainder iron and smelting-related impurities, with the optional addition of one or more elements from the group Cr, Mo, Zn and Sn, wherein the steel strip has an insulation layer substantially consisting of Al2O3 and/or SiO2 with a thickness in the range from 10 μm to 100 μm. The invention also relates to a method for producing such a steel strip.
H01F 1/18 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
H01F 1/16 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
A steel product includes the following chemical composition in wt. %: C: 0.01 to <0.3, Mn: 4 to <10, Al: 0.003 to 2.9, Mo: 0.01 to 0.8, Si: 0.02 to 0.8, Ni: 0.005 to 3, P: <0.04, S: <0.02, N: <0.02, with the remainder being iron including unavoidable steel-associated elements, wherein an alloy composition satisfies the equation 6<1.5 Mn+Ni<8; or the equation 0.11
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
The invention relates to a method for producing a steel strip, which contains along with iron as the main constituent and unavoidable impurities one or more of the oxygen-affine elements in % by weight: Al: more than 0.02, Cr: more than 0.1, Mn: more than 1.3 or Si: more than 0.1, wherein the surface of the steel strip is cleaned, the steel strip is annealed and the steel strip thus treated and annealed is subsequently coated with a hot-dip coating. In order to be less cost-intensive and achieve uniform, reproducible bonding conditions for the coating, it is proposed that, before the annealing, the steel strip is oxygen-treated at temperatures below 200°C, wherein, by the formation of oxides with iron, an oxide film containing iron oxide is formed on the surface of the steel strip and in the course of the annealing is reductively treated under a reducing atmosphere to achieve a surface that substantially consists of metallic iron.
The invention relates to a method for producing a component by hot-forming a precursor product made of a steel having a TRIP and/or TRIP/TWIP effect, having a manganese content of over 12% by weight, advantageously having up to 20% by weight and an austenite content of at least 25 to 95% by volume, advantageously at least 35 to 90% by volume, the remainder being ferrite or bainite, martensite, tempered martensite or perlite. In order to provide an improved production method which is also cost-effective and in which a higher residual formability of the component at room temperature and a significantly reduced inclination toward delayed, hydrogen-induced crack formation are achieved, according to the invention, the precursor product is formed at a hot-forming temperature above 60°C and below the Ac1-transition temperature and the original austenite content is retained in full after the forming or at least 10% of the original austenite content is retained after the forming. The invention also relates to a hot-formed component produced according to said method, and to a method for producing a steel strip as a precursor product for hot-forming a component.
The invention relates to a method for producing a component from a medium manganese flat steel product having 4 to less than 10 wt. % Mn, 0.0005 to 0.9 wt. % C, 0.02 to 10 wt. % Al, the remainder iron, including unavoidable steel-accompanying elements, and having a TRIP effect at room temperature. In order to produce a component, which is distinguished by very high strengths and an increased residual strain and re-shaping capacity, the flat steel product, according to the invention, is re-shaped by at least one re-shaping step to form a component and, before and/or during and/or after the at least one re-shaping step, the flat steel product is cooled down to a temperature of the flat steel product of less than room temperature to −196° C. The invention further relates to a component produced by this method and to a use for said components.
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
The invention relates to a method for producing a flat steel product made of a medium manganese steel having a TRIP/TWIP effect. The aim of the invention is to achieve an improvement in the yield strength when a sufficient residual deformability of the produced flat steel product is obtained. This aim is achieved by the following steps: cold rolling a hot or cold strip, annealing the cold-rolled hot or cold strip at 500 to 840° C. for 1 minute to 24 hours, temper rolling or finishing the annealed hot or cold strip to form a flat steel product having a degree of deformability between 0.3% and 60%. The invention further relates to a flat steel product produced according to said method and to a use thereof.
The invention relates to a method for producing a component from a medium-manganese flat steel product with 4 to 12 wt % Mn, preferably more than 5 to less than 10 wt % Mn, and with TRIP/TWIP effect. In order to improve the degrees of deformation of the shaped component while at the same time reducing the forming forces, the invention proposes shaping the flat steel product into a component in a first shaping step at a temperature of the flat steel product of 60° C. to below Ac3, preferably from 60° C. to 450° C. The invention also relates to a component produced according to said method and to a use for said components.
A composite material includes a metallic bottom flat element, a metallic top flat element, and an intermediate layer made of a thermosetting synthetic material and arranged between the bottom flat element and the top flat element. The intermediate layer includes three or more duromers, with at least one of the duromers being in a cured state and the other ones of the duromers being in an uncured state. The at least one of the duromers has a polymerization temperature between 50 and 100° C., with a second one of the other ones of the duromers having a polymerization temperature between 170 and 220° C. and a third one of the other ones of the duromers having a polymerization temperature between 230 and 260° C.
B32B 15/092 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising epoxy resins
B32B 15/095 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising polyurethanes
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
B32B 3/08 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
B32B 3/18 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material
B32B 7/14 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
B32B 38/00 - Ancillary operations in connection with laminating processes
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 3/00 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form
B32B 3/02 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 37/12 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
55.
HIGH-STRENGTH, HOT-ROLLED FLAT STEEL PRODUCT WITH HIGH EDGE CRACK RESISTANCE AND SIMULTANEOUSLY HIGH BAKE-HARDENING POTENTIAL, AND METHOD FOR PRODUCING A FLAT STEEL PRODUCT OF THIS KIND
The invention relates to a high-strength, hot-rolled flat steel product with high edge crack resistance and simultaneously high bake-hardening potential made of a steel with a yield strength Rp 0.2 of 660 to 820 MPa, a BH2 value of more than 30 MPa, and a hole expansion ratio of more than 30%, and a structure consisting of two main constituents, wherein a first main constituent of the structure accounts for a proportion of at least 50%, consisting of one or more individual constituents of ferrite, tempered bainite, and tempered martensite, each with less than 5% carbides, and wherein a second main constituent of the structure accounts for a proportion of 5% to 50%, consisting of one or more individual constituents of martensite, residual austenite, bainite or perlite with the following chemical composition of the steel (in % by weight): C: 0.04 to 0.12; Si: 0.03 to 0.8; Mn: 1 to 2.5; P: max. 0.08; S: max. 0.01; N: max. 0.01; AI: up to 0.1; Ni+Mo: up to 0.5; Nb: up to 0.08; Ti: up to 0.2; Nb+Ti: min. 0.03; Cr: up to 0.6; the remainder being iron including unavoidable steel-associated elements. Furthermore, the invention relates to a method for producing a flat steel product of this type.
The invention relates to an ultrahigh strength multiphase steel having a minimum tensile strength of 980 MPa containing (in wt.%): C ≥ 0.075 to ≤ 0.115; Si ≥ 0.400 to ≤ 0.500; Mn ≥ 1.900 to ≤ 2.350; Cr ≥ 0.250 to ≤ 0.400; AI ≥ 0.010 to ≤ 0.060; N ≥ 0.0020 to ≤ 0.0120; P ≤ 0.020; S ≤ 0.0020; Ti ≥ 0.005 to ≤ 0.060; Nb ≥ 0.005 to ≤ 0.060; V ≥ 0.005 to ≤ 0.020; B ≥ 0.0005 to ≤ 0.0010; Mo ≥ 0.200 to ≤ 0.300; Ca ≥ 0.0010 to ≤ 0.0060; Cu ≤ 0.050; Ni ≤ 0.050; Sn ≤ 0.040; H ≤ 0.0010; and residual iron, including customary steel-accompanying smelting-related impurities, wherein the total content of Mn+Si+Cr is ≥ 1.750 to ≤ 2.250 wt.% with a view to a processing window which is as wide as possible during the annealing process, in particular during the continuous annealing process, of cold strips of said steel.
Method for producing press-hardened components consisting of steel sheets or steel strips comprising an aluminium-based coating, and pressed-hardened component therefrom
In an aluminium-based coating for steel sheets or steel strips, the coating includes an aluminium-based coat applied in a hot-dip coating method, a covering layer containing aluminium oxide and/or hydroxide being arranged on the coat. The covering layer is produced by plasma oxidation and/or hot water treatment at temperatures of at least 90° C., advantageously at least 95° C., and/or steam treatment at temperatures of at least 90° C., advantageously at least 95° C. Alternatively, the covering layer containing aluminium oxide and/or hydroxide can be produced by anodic oxidation, the coat being produced in a molten bath with a Si content of between 8 and 12 wt. %, and an Fe content of between 1 and 4 wt. %, the remainder being aluminium.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C23C 8/36 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
C23C 8/42 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C25D 11/04 - Anodisation of aluminium or alloys based thereon
58.
OPTIMIZED CONTINUOUS CASTING MACHINE, AND METHOD FOR OPTIMALLY ORIENTING COMPONENTS OF A CONTINUOUS CASTING MACHINE
The invention relates to a continuous casting machine comprising a permanent casting mold that can be made to oscillate by an oscillation device and is followed by a plurality of segments equipped with strand guiding rollers which are arranged on support structure and are each connected to the support structure at a plurality of connection points, at least one of the bearing points of the segment that immediately follows the permanent casting mold being a floating bearing.
The invention relates to a steel alloy having improved corrosion resistance under high-temperature loading for usage temperatures of from 300°C to 1200°C, in particular 800°C to 1200°C, having the following chemical composition in % by weight: C: > 0.01 to 1.0; AI: 3.0 to 12.0; Cr: 2.0 to 15.0; Mn: 5.0 to 30.0; Si: 0.10 to 3.0; Cu: 0.001 to 2.5; Ni: 0.001 to 5.0; S: to 0.010; P: to 0.010; N: 0.001 to 0.050; B: 0.00005 to 0.0250; Mo: 0.01 to 5.0; where: 12 < Cr + 2*AI+3*Si < 24; and at least one of the elements Ti, V and Nb with the following contents in % by weight: Ti: 0.01 to 1.0, V: 0.01 to 1.0, Nb: 0.01 to 1.0, the remainder being formed by iron with impurities caused by the melting and optional addition of at least one of the rare earth elements Y, La, Ce or the elements Hf, Sr and Zr. The invention also relates to method for producing steel strips from said steel alloy and advantageous fields of application.
A high-strength air-hardenable multiphase steel having minimal tensile strengths in a non air hardened state of 750 MPa and excellent processing properties, said steel comprising the following elements in % by weight: C≥0.075 to ≤0.115; Si≥0.200 to ≤0.300; Mn≥1.700 to ≤2.300; Cr≥0.280 to ≤0.4800; Al≥0.020 to ≤0.060; N≥0.0020 to ≤0.0120; S≤0.0050; Nb≥0.005 to ≤0.050; Ti≥0.005 to ≤0.050; B≥0.0005 to ≤0.0060; Ca≥0.0005 to ≤0.0060; Cu≤0.050; Ni≤0.050; remainder iron, including usual steel accompanying smelting related impurities, wherein for a widest possible process window during continuous annealing of hot rolled or cold rolled strips made from the steel a sum content of M+Si+Cr in the steel is a function of a thickness of the steel strips according to the following relationship: for strip thicknesses of up to 1.00 mm the sum content of M+Si+Cr is ≥2.350 and ≤2.500%, for strip thicknesses of over 1.00 to 2.00 mm the sum of Mn+Si+Cr is ≥2.500 and ≤2.950%, and for strip thicknesses of over 2.00 mm the sum of Mn+Si+Cr is ≥2.950 and ≤3.250%.
C23C 2/00 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
61.
Micro-alloyed high-strength multi-phase steel containing silicon and having a minimum tensile strength of 750 MPA and improved properties and method for producing a strip from said steel
A high-strength multi-phase steel having minimum tensile strengths of 750 MPa and preferably having a dual-phase microstructure for a cold- or hot-rolled steel strip, in particular for lightweight vehicle construction is disclosed. The high-strength multi-phase steel has improved forming properties and a ratio of yield point to tensile strength of at most 73%. The high-strength multi-phase steel includes in mass %: C≥0.075 to ≤0.105; Si≥0.600 to ≤0.800; Mn≥1.000 to ≤0.700; Cr≥0.100 to ≤0.480; Al≥0.010 to ≤0.060; N 0.0020≤0.0120; S≤0.0030; Nb≥0.005 to ≤0.050; Ti≥0.0050 to ≤0.050; B≥0.0005 to ≤0.0040; Mo≤0.200; Cu≤0.040%; Ni≤0.040 % the remainder iron, including typical elements accompanying steel that are not mentioned above, which represent contamination resulting from smelting.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C21D 9/573 - Continuous furnaces for strip or wire with cooling
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/06 - Zinc or cadmium or alloys based thereon
The invention relates to a method for coating a steel sheet or steel strip to which an aluminium-based coating is applied in a dip-coating process and the surface of the coating is freed of a naturally occurring aluminium oxide layer. In order to provide a low-cost method for coating steel sheets or steel strips that makes the steel sheets or steel strips outstandingly suitable for the production of components by means of press hardening and for the further processing thereof, it is proposed that transition metals or transition metal compounds are subsequently deposited on the freed surface of the coating to form a top layer. The invention also relates to a method for producing press-hardened components from the aforementioned steel sheets or steel strips with an aluminium-based coating.
C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C25D 5/48 - After-treatment of electroplated surfaces
63.
METHOD FOR THE OPTIMIZED PRODUCTION OF A COMPONENT WITH AT LEAST ONE SECONDARY FORMED ELEMENT
The invention relates to a method for the optimized production of a component, in particular from steel, with at least one secondary formed element, comprising the steps of a) providing a blank which has been cut to size at room temperature from a strip or a sheet and in which cut-outs and/or holes have optionally been created by stamping or cutting operations; b) thermal treatment of selected edge regions of the blank that have been cold-hardened by the stamping or cutting operations, in which the edge regions are heated to a temperature of at least 600°C for a maximum 10 seconds; c) forming the thermally treated edge regions of the blank at ambient temperature to obtain a component with an unfinished secondary formed element; characterized by an additional step d), a calibrating step for obtaining the component with the secondary formed element, wherein the unfinished secondary formed element is formed at ambient temperature into a secondary formed element that has an increased and/or more uniform wall thickness in comparison with the unfinished secondary formed element.
The invention relates to a method for producing a component by further forming of a preformed contour of a blank, wherein the blank which has previously been cut to size at room temperature from a strip or a sheet is subjected to a first shaping operation at ambient temperature after optional further production steps carried out at ambient temperature, such as for example stamping or cutting operations to achieve clearances or apertures, in selected edge regions that have been cold-hardened by the stamping or cutting operations to obtain a preformed contour. Optionally the edge regions that are already intended for shaping, but at least the edge regions that have already undergone the first shaping are thereby heated to a temperature of at least 600°C for a maximum time of 10 seconds and, at any desired time after this thermal treatment, the edge regions are subjected to a second shaping or to further shaping operations at ambient temperature with prior thermal treatments in each case.
A non-scaling heat-treatable steel with particular suitability for producing hardened or die-hardened components is disclosed, characterized by the following chemical composition in % by weight: C 0.04-0.50; Mn 0.5-6.0; Al 0.5-3.0; Si 0.05-3.0; Cr 0.05-3.0; Ni less than 3.0; Cu less than 3.0; Ti 0.0104-≤0.050; B 0.0015-≤40.0040; P less than 0.10; S less than 0.05; N less than 0.020; remainder iron and unavoidable impurities. Further disclosed is a method for producing a non-scaling hardened component from the steel and a method for producing a hot strip from a steel.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C21D 1/18 - HardeningQuenching with or without subsequent tempering
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
B22D 11/126 - Accessories for subsequent treating or working cast stock in situ for cutting
66.
METHOD AND DEVICE FOR OPERATING A DIRECT REDUCTION REACTOR FOR PRODUCING DIRECT-REDUCED IRON FROM IRON ORE
The invention relates to a method for operating a direct reduction reactor (1) for producing direct-reduced iron (2) from iron ore (3), wherein the CO2- and H2O-containing furnace gas (4) arising in the production of direct-reduced iron (2) is fed to a high-temperature electrolytic cell (5), in which CO- and H2-containing synthesis gas (6) and oxygen are produced by means of co-electrolysis.
The invention relates to a method for producing a wheel disc from a dual-phase steel, having improved cold workability of cold-solidified, mechanically separated sheet metal edges, comprising the following method steps: - providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition having a dual phase structure, consisting of a ferritic matrix, into which a predominantly martensitic second phase is embedded in an insular manner, - cutting a sheet at room temperature and optionally carrying out further punching or cutting operations, - heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700 °C with a dwell time of at most 10 seconds and subsequent cooling with air, and - cold forming the blank in one or more steps to form a wheel disc at room temperature.
C21D 7/02 - Modifying the physical properties of iron or steel by deformation by cold working
B21D 53/26 - Making other particular articles wheels or the like
B21D 53/30 - Making other particular articles wheels or the like wheel rims
C21D 9/34 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tyresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rims
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
68.
METHOD FOR PRODUCING CHASSIS PARTS FROM MICRO-ALLOYED STEEL WITH IMPROVED COLD WORKABILITY
The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: - providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent. cutting a blank at room temperature and optionally carrying out further punching or cutting operations, - heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700 °C with a dwell time of at most 10 seconds and subsequent cooling with air, - cold forming the blank in one or more steps to form a chassis part at room temperature.
The invention relates to a steel product for low-temperature use having a minimum notch impact work at -196 °C in the transverse direction of = 50 J/cm2, having the following chemical composition in wt%: C: 0.01 to < 0.3, preferably 0.03 to 0.15; Mn: 4 to < 10, preferably 4 to < 8; Al: 0.003 to 2.9, preferably 0.03 to 0.4; Mo: 0.01 to 0.8, preferably 0.1 to 0.5; Si: 0.02 to 0.8, preferably 0.08 to 0.3; Ni: 0.005 to 3, preferably 0.01 to 3; P: < 0.04; S: < 0.02; N: < 0.02; remainder iron including unavoidable steel-accompanying elements, wherein for the alloy composition the equation 6 < 1.5 Mn+Ni < 8 is satisfied, with optional addition of one or more of the following elements: Ti, V, Cr, Cu, Nb, B, Co, W, Zr, Ca, and Sn, or for the alloy composition, the equation 0.11 < C + Al < 3 is satisfied, with the optional addition of one or more of the following elements: Ti, V, Cr, Cu, Nb, B, Co, W, Zr, Ca, and Sn, or the alloy composition, in addition to Ni, contains one or more of the elements B, V, Nb, Co, W, or Zr, with the optional addition of one or more of the following elements: Ti, Cr, Cu, Ca, and Sn, having a structure comprising 2 to 90 % by volume of austenite, less than 40 % by volume of ferrite and/or bainite and the rest martensite. Said steel product can be produced economically and exhibits an advantageous combination of strength and strain properties at low temperatures and, optionally, a TRIP and/or TWIP effect. The invention further relates to a method for producing a steel product in the form of a flat steel product or a seamless tube.
The invention relates to a seamlessly produced and semi-hot-formed pipe made of a medium manganese steel, having a TRIP and/or TWIP effect during deformation, having the following chemical composition in wt%: C: 0.0005 to 0.9, Mn: 4 to 12, P: ឬ 0.1, S: ឬ 0.1, N: ឬ 0.1, the remainder iron including unavoidable steel-accompanying elements, with the optional addition of one or more of the following elements: Al, Si, Cr, Ni, Nb, V, Ti, Mo, Sn, Cu, W, Co, Zr, Ta, Te, Sb, B, Ca, having a microstructure consisting of 5 to 90 vol% austenite, less than 40 vol% ferrite and/or bainite and the remainder martensite. Said seamlessly produced and semi-hot-formed pipe can be economically produced and has a good property combination of strength and elongation at break, a good residual toughness, and a TRIP and/or TWIP effect. The invention further relates to a method for producing such a pipe.
The invention relates to a seamlessly produced tube of a medium manganese steel, comprising a TRIP and/or TWIP effect during deforming, with the following chemical composition in % by weight: C: 0.0005 to 0.9; Mn: 4 to 10; Al: 0.01 to 10; P: ឬ 0.1; S: ឬ 0.1; N: ឬ 0.1; where Al + Mn ᡶ 6.15, preferably ᡶ 6.50, the remainder being iron including unavoidable steel-accompanying elements, with optional alloying of one or more of the following elements: Si, Cr, Ni, Nb, V, Ti, Mo, Sn, Cu, W, Co, Zr, Ta, Te, Sb, B, Ca, having a microstructure consisting of 5 to 90% by volume austenite, less than 40% by volume ferrite and/or bainite and the remainder martensite. This seamlessly produced tube can be produced at low cost and has a good combination of properties comprising strength and elongation at rupture and also a good residual toughness as well as a TRIP and/or TWIP effect. The invention also relates to a method for producing such a tube.
The invention relates to a steel product for low-temperature use having a minimum notch impact work at -196 °C in the transverse direction of ≥ 50 J/cm2, having the following chemical composition in wt%: C: 0.01 to ឬ 0.3, preferably 0.03 to 0.15; Mn: 4 to ឬ 10, preferably 4 to ឬ 8; Al: 0.003 to 2.9, preferably 0.03 to 0.4; Mo: 0.01 to 0.8, preferably 0.1 to 0.5; Si: 0.02 to 0.8, preferably 0.08 to 0.3; Ni: 0.005 to 3, preferably 0.01 to 3; P: ឬ 0.04; S: ឬ 0.02; N: ឬ 0.02; remainder iron including unavoidable steel-accompanying elements, wherein for the alloy composition the equation 6 ឬ 1.5 Mn+Ni ឬ 8 is satisfied, with optional addition of one or more of the following elements: Ti, V, Cr, Cu, Nb, B, Co, W, Zr, Ca, and Sn, or for the alloy composition, the equation 0.11 ឬ C + Al ឬ 3 is satisfied, with the optional addition of one or more of the following elements: Ti, V, Cr, Cu, Nb, B, Co, W, Zr, Ca, and Sn, or the alloy composition, in addition to Ni, contains one or more of the elements B, V, Nb, Co, W, or Zr, with the optional addition of one or more of the following elements: Ti, Cr, Cu, Ca, and Sn, having a structure comprising 2 to 90 % by volume of austenite, less than 40 % by volume of ferrite and/or bainite and the rest martensite. Said steel product can be produced economically and exhibits an advantageous combination of strength and strain properties at low temperatures and, optionally, a TRIP and/or TWIP effect. The invention further relates to a method for producing a steel product in the form of a flat steel product or a seamless tube.
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
73.
METHOD FOR PRODUCING A FLAT STEEL PRODUCT MADE OF A MANGANESE-CONTAINING STEEL, AND SUCH A FLAT STEEL PRODUCT
The invention relates to a method for producing a flat steel product made of a medium manganese steel having a TRIP/TWIP effect. The aim of the invention is to achieve an improvement in the yield strength when a sufficient residual deformability of the produced flat steel product is obtained. This aim is achieved by the following steps: cold rolling a hot or cold strip, annealing the cold-rolled hot or cold strip at 500 to 840 °C for 1 minute to 24 hours, temper rolling or finishing the annealed hot or cold strip to form a flat steel product having a degree of deformability between 0.3 % and 60 %. The invention further relates to a flat steel product produced according to said method and to a use thereof.
The invention relates to a method for producing a component from a medium manganese flat steel product having 4 to less than 10 wt% Mn, 0.0005 to 0.9 wt% C, 0.02 to 10 wt% Al, the remainder iron, including unavoidable steel-accompanying elements, and having a TRIP effect at room temperature. In order to produce a component, which is distinguished by very high strengths and an increased residual strain and re-shaping capacity, the flat steel product, according to the invention, is re-shaped by at least one re-shaping step to form a component and, before and/or during and/or after the at least one re-shaping step, the flat steel product is cooled down to a temperature of the flat steel product of less than room temperature to -196 °C. The invention further relates to a component produced by this method and to a use for said components.
The invention relates to a method for producing a component from a medium-manganese flat steel product with 4 to 12 wt% Mn, preferably more than 5 to less than 10 wt% Mn, and with TRIP/TWIP effect. In order to improve the degrees of deformation of the shaped component while at the same time reducing the forming forces, the invention proposes shaping the flat steel product into a component in a first shaping step at a temperature of the flat steel product of 60°C to below Ac3, preferably from 60°c to 450°C. The invention also relates to a component produced according to said method and to a use for said components.
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
76.
METHOD FOR PRODUCING A HOT OR COLD STRIP AND/OR A FLEXIBLY ROLLED FLAT STEEL PRODUCT MADE OF A HIGH-STRENGTH MANGANESE STEEL AND FLAT STEEL PRODUCT PRODUCED BY SAID METHOD
The invention relates to a method for producing a flexibly rolled flat steel product made of a high-strength manganese steel and having final thicknesses that vary as required from section to section. In order to achieve a high maximum degree of deformation, the following method steps are proposed: providing a galvanized or non-galvanized hot or cold strip with an alloy composition containing (in wt%): C: 0.0005 to 0.9; Mn: 4 to 12; Al: up to 10; P: ឬ0.1; S: ឬ0.1; N: ឬ0.1; the remainder being iron, including unavoidable steel-alloying elements, with optional addition of one or more of the following elements (in wt%): Si: up to 6; Cr: up to 6; Nb: up to 1; V: up to 1.5; Ti: up to 1.5; Mo: up to 3; Sn: up to 0.5; Cu: up to 3; W: up to 5; Co: up to 8; Zr: up to 0.5; Ta: up to 0.5; Te: up to 0.5: B: up to 0.15; - flexibly rolling the hot or cold strip in one rolling step or in multiple rolling steps to the final thicknesses that vary as required from section to section, with the hot or cold strip at a temperature of 60°C to below Ac3, preferably from 60°C to 450°C, prior to the first rolling step. The invention also relates to a method for producing a hot or cold strip made of a high-strength manganese steel and to a flat steel product which is flexibly rolled according to said method.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/30 - Ferrous alloys, e.g. steel alloys containing chromium with cobalt
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
B21B 37/24 - Automatic variation of thickness according to a predetermined programme
B21B 37/26 - Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/06 - Zinc or cadmium or alloys based thereon
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 9/48 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals deep-drawing sheets
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
77.
METHOD FOR PRODUCING A HIGH-STRENGTH STEEL STRIP WITH IMPROVED PROPERTIES FOR FURTHER PROCESSING, AND A STEEL STRIP OF THIS TYPE
The invention relates to a method for producing a high-strength steel strip with a TRIP/TWIP effect, which method is cost-effective and with which method the steel strip has improved properties for further processing, in particular a good combination of strength and forming properties, and increased resistance to hydrogen-induced delayed fracture, to hydrogen embrittlement and to liquid metal embrittlement. The method comprises the following steps: - melting a steel melt containing (in wt%): C: 0.1 to ឬ 0.3; Mn: 4 to ឬ 8; Al: ᡶ 1 to 2.9; P: ឬ 0.05; S: ឬ 0.05; N: ឬ 0.02; remainder iron including unavoidable steel-associated elements, with the optional addition of one or more of the following elements (in wt%): Si: 0.05 to 0.7; Cr: 0.1 to 3; Mo: 0.01 to 0.9; Ti: 0.005 to 0.3; B: 0.0005 to 0.01 in a blast furnace process or arc furnace process with optional vacuum treatment of the melt; - casting the steel melt to form a rough strip by means of a horizontal or vertical strip-casting process close to the final dimensions, or casting the steel melt to form a slab or thin slab by means of a horizontal or vertical slab- or thin-slab-casting process; - heating to a rolling temperature of 1050 to 1250°C or inline rolling from the casting heat; - hot-rolling the rough strip or slab or thin slab to form a hot strip having a thickness of 12 to 0.8 mm at a final rolling temperature of 1050 to 800°C; - coiling the hot strip at a temperature of more than 200 to 800°C; - pickling the hot strip; - annealing the hot strip in a continuous or batch annealing installation for an annealing time of 1 min to 48 h and at temperatures of 540 to 840°C; - cold-rolling the hot strip at room temperature or elevated temperature in one or more rolling passes; - optionally electrolytically galvanising or hot-dip galvanising the steel strip or applying another type of organic or inorganic coating. The invention also relates to a high-strength and cost-effective steel strip having improved properties for further processing.
The invention relates a composite material (1) consisting of a metallic bottom flat element (2), a metallic top flat element (2’) and an intermediate layer of thermosetting plastic arranged between the bottom flat element (2) and the top flat element (2’). In order to provide a composite material (1) comprising an intermediate layer of thermosetting plastic that has improved shaping properties and moreover can be produced at low cost and by a reliable process, it is proposed that the intermediate layer consists of three or more thermosetting materials (3, 4, 5), wherein one thermosetting material (3) is in a set state and the other thermosetting material (4) is in a non-set state and the first thermosetting material (3) has a polymerization temperature of between 50 and 100°C, the second thermosetting material (4) has a polymerization temperature of between 170 and 220°C and a third thermosetting material (5) has a polymerization temperature of between 230 and 260°C. The invention also relates to a method for producing such a composite material and a method for producing a shaped component from it.
B32B 7/02 - Physical, chemical or physicochemical properties
B32B 7/14 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 15/092 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising epoxy resins
B32B 15/095 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising polyurethanes
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 3/00 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form
B32B 3/02 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
B32B 3/08 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
B32B 3/18 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material
79.
STEEL STRIP FOR PRODUCING A NON-ORIENTED ELECTRICAL STEEL, AND METHOD FOR PRODUCING SUCH A STEEL STRIP
The invention relates to a steel strip for producing a non-oriented electrical steel. To achieve greatly improved frequency-independent magnetic properties, in particular greatly reduced hysteresis losses, in comparison with known electrical steels, the following alloy composition in wt% is proposed: C: ≤0.03, Al: 1 to 12, Si: 0.3 to 3.5, Mn: >0.25 to 10, Cu: >0.05 to 3.0, Ni: >0.01 to 5.0, total of N, S and P: at most 0.07, remainder iron and smelting-related impurities, with the optional addition of one or more elements from the group Cr, Mo, Zn and Sn, wherein the steel strip has an insulation layer substantially consisting of Al2O3 and/or SiO2 with a thickness in the range from 10 µm to 100 µm. The invention also relates to a method for producing such a steel strip.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
H01F 1/16 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
80.
METHOD FOR PRODUCING A COLD-ROLLED STEEL STRIP HAVING TRIP-CHARACTERISTICS MADE OF A HIGH-STRENGTH MANGAN-CONTAINING STEEL
The invention relates to a method for producing a cold-rolled steel strip made of a high-strength mangan-containing steel with TRIP-characteristics, containing (in wt.%) C: 0.0005 to 0.9, Mn: more than 3.0 to 12, with the remaining portion being iron including unavoidable steel-associated elements, with the optional addition of one or more of the following elements (in wt.%): AI: up to 10; Si: up to 6; Cr: up to 6; Nb: up to 1.5; V: up to 1.5; Ti: up to 1.5; Mo: up to 3; Cu: up to 3; Sn: up to 0.5; W: up to 5; Co: up to 8; Zr: up to 0.5; Ta: up to 0.5; Te: up to 0.5; B: up to 0.15; P: max. 0.1, in particular ឬ 0.04; S: max. 0.1, in particular ឬ 0.02; N: max. 0.1, in particular ឬ 0.05; Ca: up to 0.1. According to the invention, in order to improve a corresponding method, the cold-rolling to a required end thickness occurs at a temperature of over 50°C to 400°C before the first impact.
The invention relates to a component made of press-form-hardened, aluminium-based coated steel sheet, the coating having a covering which contains aluminum and silicon applied in the hot-dip process, characterized in that the press-form-hardened component in the transition region between steel sheet and covering has an inter-diffusion zone I, wherein, depending on the layer application of the covering before heating and press hardening, the thickness of the inter-diffusion zone I obeys the following formula: I [µm] ឬ (1/35) x application on both sides [g/m2] + (19/7), on the inter-diffusion zone I there is formed a zone having various intermetallic phases having an average total thickness between 8 and 50 µm, on which zone there is in turn arranged a covering layer containing aluminum oxide and/or hydroxide having an average thickness of at least 0.05 µm to at most 5 µm. The invention further relates to a method for producing the aforementioned component.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 8/02 - Pretreatment of the material to be coated
The invention relates to a method for producing a component by hot-forming a pre-product composed of steel, wherein the pre-product is heated to a temperature above 60 °C and below the Ac3 transformation temperature and then formed in this temperature range, wherein the component has a minimum tensile strength of 700 MPa and high elongation at break, wherein the pre-product has the following alloy composition in percent by weight: C: 0.0005 to 0.9; Mn: more than 3.0 to 12; the remainder iron including unavoidable steel-accompanying elements, with the optional addition of one or more of the following elements (in percent by weight): Al: up to 10; Si: up to 6; Cr: up to 6; Nb: up to 1.5; V: up to 1.5; Ti: up to 1.5; Mo: up to 3; Cu: up to 3; Sn: up to 0.5; W up to 5; Co: up to 8; Zr: up to 0.5; Ta: up to 0.5; Te: up to 0.5; B: up to 0.15; P: at most 0.1, in particular ឬ 0.04; S: at most 0.1, in particular ឬ 0.02; N: at most 0.1, in particular ឬ 0.05; Ca: up to 0.1. The invention further relates to a hot-formed component produced from a steel.
The invention relates to a roller, in particular a skin pass roller, with a surface structure with stochastically distributed structure elements (3) of stochastic size, in particular for producing flat products from a metal material, in particular from a steel material, by way of which flat products with an improved oil retention capability and oil distribution can be skin passed, since the structure elements (3) have a height in the range from 20 to 300 µm, the structure elements (3) have a width in the range from 60 to 600 µm, and the structure elements (3) have a number of from 5 to 60 per mm². The invention also relates to a flat product made from a metal material, in particular skin passed by way of an above-mentioned roller (1), with a surface structure with stochastically distributed depressions (4) of stochastic size, in which method an improved oil retention capability and oil distribution are achieved by virtue of the fact that the depressions (4) have a depth in the range from 15 to 90 µm, the depressions (4) have a width in the range from 50 to 400 µm, the depressions (4) have a number of from 4 to 60 per mm², and the sum of the area of the depressions projected onto the flat product has an area proportion of 0.41 or greater.
The invention relates to a planishing roll having a surface structure, in particular for producing flat products from a metallic material, in particular from a steel material. In order to devise an improved planishing roll having a surface structure, the surface structure according to the invention has a material ratio of 2% at a depth of 0.2 µm to 9 µm, preferably at a depth of 0.8 µm to 5.5 µm, the depth is measured, starting from a zero line, in the direction of an axis of rotation of the planishing roll, the zero line runs parallel to the axis of rotation of the planishing roll and, starting from the surface of the planishing roll, the zero line is displaced in the direction of the axis of rotation of the planishing roll until the material ratio of the planishing roll is 0.1%. The invention further relates to a method for planishing a flat product made of a metallic material, in particular from a steel material, by using said planishing roll, and to a flat product produced by said method.
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
86.
ALUMINIUM-BASED COATING FOR STEEL SHEETS OR STEEL STRIPS AND METHOD FOR THE PRODUCTION THEREOF
The invention relates to an aluminium-based coating for steel sheets or steel strips, the coating comprising an aluminium-based coat applied in a hot-dip coating method, a covering layer containing aluminium oxide and/or hydroxide being arranged on the coat. The aim of the invention is to provide an aluminium-based coating which is highly suitable for hot forming and cold forming. To this end, the covering layer is produced by means of plasma oxidation and/or hot water treatment at temperatures of at least 90°C, advantageously at least 95°C, and/or steam treatment at temperatures of at least 90°C, advantageously at least 95°C. Alternatively, the covering layer containing aluminium oxide and/or hydroxide can be produced by anodic oxidation, the coat being produced in a molten bath with a Si content of between 8 and 12 wt. %, and an Fe content of between 1 and 4 wt. %, the remainder being aluminium. The invention also relates to a method therefor and to a method for producing press-hardened components therewith, and to the associated press-hardened component.
C23C 8/36 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
C23C 8/42 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
The invention relates to a metal/plastic composite component in which the metallic component is materially bonded to a thermoplastic plastic material applied thereto. Said metallic component, on the surface areas coming into contact with the plastic material, comprises a corrosion protective coating, made of a phosphate coating, for a bonded adhesive composite between the metallic component and the plastic material.
B29C 65/00 - Joining of preformed partsApparatus therefor
C23C 22/07 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing phosphates
C23C 22/36 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing fluorides or complex fluorides containing also phosphates
C23C 22/42 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing molybdates, tungstates or vanadates containing also phosphates
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
88.
COMPOSITE PIPE CONSISTING OF A CARRIER PIPE AND AT LEAST ONE PROTECTIVE PIPE, AND METHOD FOR THE PRODUCTION THEREOF
The invention relates to a composite pipe consisting of a carrier pipe (2) and at least one protective pipe (3), wherein the carrier pipe (2) is produced from a non-corrosion resistant steel, which has at least a partially austenitic structure, with the following chemical composition (in wt.%): C: 0.005 to 1.4; Mn: 5 to 35; the remainder being iron including unavoidable elements accompanying steel, with the optional alloying of the following elements (in wt.%): Ni: 0 to 6; Cr: 0 to 9; Al: 0 to 15; Si: 0 to 8; Mo: 0 to 3; Cu: 0 to 4; V: 0 to 2; Nb: 0 to 2; Ti: 0 to 2; Sb: 0 to 0.5; B: 0 to 0.5; Co: 0 to 5; W: 0 to 3; Zr: 0 to 4; Ca: 0 to 0.1; P: 0 to 0.6; S: 0 to 0.2; N: 0.002 to 0.3. The invention also relates to a method for producing such a composite pipe (1) of this type, wherein the carrier pipe (2) and the at least one protective pipe (3) are mechanically or metallurgically connected to one another.
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B21C 37/06 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of tubes or metal hosesCombined procedures for making tubes, e.g. for making multi-wall tubes
B21C 37/15 - Making tubes of special shapeMaking the fittings
A method is disclosed for calculating the combination of properties of phase components and of mechanical properties being established of a predefined alloy composition for a deformable lightweight steel having the elements in percent by weight C 0.02 to ≤1.0, Al 2.5 to ≤8.0, Si 0.0 to ≤1.5, Mn ≥5.0 to ≤35.0, Cr >1.0 to ≤14.0, total content of N, S, P ≤0.1, the remainder iron and other steel-accompanying elements with some contents of Cu, Mo, Ni, and Zn of up to 1.0 wt % in total by using specific formulas on the basis of the manganese content, wherein, in the formulas, the alloy contents are used as absolute numbers without dimensions, and the calculated, dimensionless values are assigned the units MPa for Rm and Rp and % for A80.
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
90.
HIGH-TENSILE MANGANESE STEEL CONTAINING ALUMINIUM, METHOD FOR PRODUCING A SHEET-STEEL PRODUCT FROM SAID STEEL AND SHEET-STEEL PRODUCT PRODUCED ACCORDING TO THIS METHOD
The invention relates to a high-tensile manganese steel containing aluminium, said steel having the following chemical composition (in % by weight): C: 0.01 to ឬ 0.3; Mn: 4 to ឬ 10; Al: ᡶ 1 to 4; Si: 0.01 to 1; Cr: 0.1 to 4; Mo; 0.02 to 1; P: ឬ 0.1; S: ឬ 0.1; N: ឬ 0.3; the remainder being iron with unavoidable elemental inclusions associated with steel, and with optional alloying of one or more of the following elements (in % by weight): V: 0.01 to 1; Nb: 0.01 to 1; Ti: 0.01 to 1; Sn: 0 to 0.5; Cu: 0.005 to 3; W: 0.03 to 3; Co: 0.05 to 3; Zr: 0.03 to 0.5 and Ca: 0.0005 to 0.1. Said steel has an excellent combination of strength-, strain- and deformation characteristics. The invention also relates to a method for producing a sheet-steel product from said steel and to a sheet-steel product produced according to this method.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/30 - Ferrous alloys, e.g. steel alloys containing chromium with cobalt
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
91.
HIGH-TENSILE STEEL CONTAINING MANGANESE, USE OF SAID STEEL FOR FLEXIBLY-ROLLED SHEET-STEEL PRODUCTS, AND PRODUCTION METHOD AND ASSOCIATED SHEET-STEEL PRODUCT.
The invention relates to a high-tensile steel containing manganese, in particular for producing a flexibly-rolled sheet-steel product in the form of a hot- or cold-rolled strip, with the following chemical composition (in % by weight): C: 0.005 to 0.6; Mn: 4 to 10; Al: 0.005 to 4; Si: 0.005 to 2; P: 0.001 to 0.2; S: up to 0.05; N: 0.001 to 0.3; the remainder being iron with unavoidable elemental inclusions associated with steel, and with optional alloying of one or more of the following elements (in % by weight): Sn: 0 to 0.5; Ni: 0 to 2; Cu: 0.005 to 3; Cr: 0.1 to 4; V: 0.005 to 0.9; Nb: 0.005 to 0.9; Ti: 0.005 to 0.9; Mo: 0.01 to 3; W: 0.1 to 3; Co: 0.1 to 3; B: 0.0001 to 0.05; Zr: 0.005 to 0.5; Ca: 0.0002 to 0.1. Said steel has an excellent combination of strength-, strain- and deformation characteristics. The invention also relates to the use of said steel for producing a flexibly-rolled sheet-steel product, to a method for producing a sheet-steel product from said steel and to a sheet-steel product produced according to this method.
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
The invention relates to a high-alloy steel, in particular for producing pipes shaped by means of internal high pressure, having high cold formability, TRIP and/or TWIP properties, a partially or completely austenitic microstructure having at least 5% residual austenite, and having the following chemical composition (in wt%): Cr: 7 to 20; Mn: 2 to 9; Ni: up to 9; C: 0.005 to 0.4; N: 0.002 to 0.3; the remainder being iron including unavoidable steel-accompanying elements, with optional addition of the following elements (in wt%): Al: 0 to 3; Si: 0 to 2; Mo: 0.01 to 3; Cu: 0.005 to 4; V: 0 to 2; Nb: 0 to 2; Ti: 0 to 2; Sb: 0 to 0.5; B: 0 to 0.5; Co: 0 to 5; W: 0 to 3; Zr: 0 to 2; Ca: 0 to 0.1; P: 0 to 0.6; S: 0 to 0.2. The invention further relates to a method for producing pipes from said steel, said pipes being shaped by means of internal high pressure.
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for tubular bodies or pipes
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
The invention relates to a formable lightweight steel having improved mechanical properties and high resistance to delayed hydrogen-induced cracking and hydrogen embrittlement, comprising the following elements (in wt.%): C 0.02 to ≤1.0; Mn 3 to 30; Si ≤4; P max. 0.1; S max. 0.1; N max. 0.03; Sb 0.003 to 0.8, particularly advantageously to 0.5, as well as at least one or more of the following carbide-forming elements in the specified proportions (in wt.%): Al ≤15; Cr ᡶ0.1 to 8; Mo 0.05 to 2; Ti 0.01 to 2; V 0.005 to 1; Nb 0.00 to 1; W 0.005 to 1; Zr 0.001 to 0.3; with the remainder consisting of iron including the usual steel-accompanying elements, with the optional addition of the following elements in wt.%: Ni max. 5, Co max. 10, Ca max. 0.005, B max. 0.01 and Cu 0.05 to 2. The invention also relates to a method for producing said lightweight steel.
The invention relates to a method for producing a hot-rolled strip composed of a bainitic multi-phase steel and having a Zn-Mg-Al coating, comprising the following steps: melting a steel melt containing (in weight percent): C: 0.04 - 0.11, Si: ឬ= 0.7, Mn: 1.4 - 2.2, Mo: 0.05 - 0.5, Al: 0.015 – 0.1, P: up to 0.02, S: up to 0.01, B: up to 0.006, and at least one element from the group Nb, V, Ti in accordance with the following condition: 0.02 ឬ= Nb + V + Ti ឬ= 0.20, the remainder being iron including unavoidable steel-accompanying elements resulting from the melting process, casting the steel melt into a preliminary material, in particular a slab or a block or a thin slab, hot rolling the preliminary material into a hot-rolled strip having a final rolling temperature in the range of 800 to 950 °C, cooling the hot-rolled strip to a winding temperature less than 650 °C, winding the hot-rolled strip at a winding temperature less than 650 °C, cooling the wound hot-rolled strip to room temperature in still air, wherein the microstructure of the wound hot-rolled strip then has a bainite fraction greater than 50% after the hot rolling, heating the hot-rolled strip to a temperature greater than 650 °C and less than Ac3, in particular less than Ac1 + 50 °C, cooling the hot-rolled strip to zinc bath temperature, hot-dip coating the heated hot-rolled strip in a zinc alloy molten bath containing (in weight percent): Al: 1.0 – 2.0, Mg: 1.0 – 2.0, the remainder being zinc and unavoidable impurities. The invention further relates to the hot-rolled strip produced in accordance with the method above and to shaped, dynamically highly loadable components, in particular motor vehicle parts, that are produced from said hot-rolled strip and that are resistant to corrosive and abrasive influences.
The invention relates to an ultrahigh strength multiphase steel with a dual-phase microstructure or a complex-phase microstructure and with a low content of residual austenite in particular for lightweight vehicle construction, to a method for producing cold-rolled steel strips from such a steel, and to steel strips produced using said method. The aim of the invention is a novel alloy concept with which the processing window for the continuous annealing of cold strips can be extended. According to the invention, this is achieved by a multiphase steel with a minimum tensile strength of 980 MPa containing (contents in wt.%): C ≥ 0.075 to ≤ 0.115, Si ≥ 0.400 to ≤ 0.500, Mn ≥ 1.900 to ≤ 2.350, Cr ≥ 0.250 to ≤ 0.400, Al ≥ 0.005 to ≤ 0.060, N ≥ 0.0020 to ≤ 0.0120, S ≤ 0.0020, Nb ≥ 0.005 to ≤ 0.060, Ti ≥ 0.005 to ≤ 0.060, B ᡶ 0.0005 to ≤ 0.0010, Moᡶ 0.200 to ≤ 0.300, Ca ᡶ 0.0010 to ≤ 0.0060, Cu ≤ 0.050, Ni ≤ 0.050, and residual iron, including customary steel-accompanying smelting-related impurities, wherein the total content of Mn+Si+Cr is ≥ 2.500 to ≤ 3.250 with a view to a processing window which is as wide as possible during the annealing process, in particular during the continuous annealing process, of cold strips of said steel.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/40 - Ferrous alloys, e.g. steel alloys containing chromium with nickel
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
96.
DEFORMATION-HARDENED COMPONENT MADE OF GALVANIZED STEEL, PRODUCTION METHOD THEREFOR AND METHOD FOR PRODUCING A STEEL STRIP SUITABLE FOR THE DEFORMATION-HARDENING OF COMPONENTS
The invention relates to a deformation-hardened component made of galvanized steel, a method for producing a steel strip that is suitable for the deformation-hardening of components and a method for the production of a deformation-hardened component made of this steel strip. The deformation-hardened component made of galvanized steel, wherein first a plate is cut from a steel strip or steel sheet coated with zinc or a zinc-based alloy, subsequently heated to a deformation temperature above Ac3 and deformed and also hardened, having an at least partly martensitic transformation structure after having been shaped, wherein the steel has the following chemical composition in wt. %: C: 0.10 - 0.50, Si: 0.01 - 0.50, Mn: 0.50 - 2.50, P <0.02, S <0.01, N <0.01, Al: 0.015 - 0.100, B <0.004, remainder: iron, including inevitable melting and steel associated elements, having at least one element of the group Nb, V, Ti, wherein the sum of the Nb+V+Ti content is in a range of 0.01 to 0.20 wt. %, wherein the structure of the steel after the deformation hardening process has an average grain size of the former austenite grains of <15.
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C23C 2/06 - Zinc or cadmium or alloys based thereon
97.
METHOD OF PRODUCING A HOT OR COLD STRIP FROM A STEEL HAVING INCREASED COPPER CONTENT
The invention relates to a method for producing a hot or cold strip from a steel having an increased copper content, comprising the steps: melting a steel melt having the following chemical composition (in wt.%) C: up to 0.4, Mn: up to 3, AI: up to 2, Si: up to 2, Cu: more than 0.8, P: up to 0.2, S: up to 0.05 and N: up to 0.3, with optional addition of one or more of the elements Sn, Ni, Cr, V, Nb, Ti, Mo, W, B, Co, Sb and Zr, the remainder being iron including unavoidable steel-accompanying elements; casting the melt under an inertising or reducing or oxidising atmosphere, having an oxygen content of less than 10 vol.%, by means of a near-net-shape casting method, in particular horizontal strip casting or vertical casting according to the two-roll method, into a pre-strip having a thickness in the range between 1 mm and 30 mm, preferably 1 mm to 20 mm; cooling the cast pre-strip at a cooling rate of at least 100 K/s at the actively cooled strip surface until forming a rigid boundary layer, and further steps.
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B22D 11/124 - Accessories for subsequent treating or working cast stock in situ for cooling
B22D 11/14 - Plants for continuous casting, e.g. for upwardly drawing the strand
B22D 11/22 - Controlling or regulating processes or operations for cooling cast stock or mould
B22D 15/00 - Casting using a mould or core of which a part significant to the process of high thermal conductivity, e.g. chill castingMoulds or accessories specially adapted therefor
B22D 37/00 - Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
In a method for improving the weldability of high-manganese-containing steel strips which contain (in % by weight) from 6 to 30% of manganese, up to 1% of carbon, up to 15% of aluminum, up to 6% of silicon, up to 6.5% of chromium, up to 4% of copper and also total additions of titanium and zirconium of up to 0.7% and total additions of niobium and vanadium of up to 0.5%, balance iron including unavoidable steel-accompanying elements the steel strips are coated with a zinc-containing corrosion protection layer.
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
C25D 3/22 - ElectroplatingBaths therefor from solutions of zinc
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/06 - Zinc or cadmium or alloys based thereon
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C23C 16/06 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
C23C 14/00 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
99.
HIGH-STRENGTH AIR-HARDENING MULTI-PHASE STEEL COMPRISING OUTSTANDING PROCESSING PROPERTIES AND METHOD FOR THE PRODUCTION OF A STEEL STRIP FROM SAID STEEL
The invention relates to a high-strength air-hardening multi-phase steel which has a minimum tensile strength of 750 MPa and has outstanding processing properties, consisting of a composition defined in claim 1, in which, with a view to a possibly broad process window in the continuous annealing of warm or cold strips from said steel, according to the produced strip thickness, the total content of Mn+Si+Cr+Mo is adjusted as follows: up to 1.00 mm, total of Mn+Si+Cr+Mo ≥ 2.450 and ≤ 2.800 weight %; over 1.00 up to 2.00 mm, total of Mn+Si+Cr+Mo ≥ 2.600 and ≤ 3.150 weight %; over 2.00 mm, total of Mn+Si+Cr+Mo ≥ 3.000 and ≤ 3.450 weight %.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/40 - Ferrous alloys, e.g. steel alloys containing chromium with nickel
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
100.
HIGH-STRENGTH AIR-HARDENING MULTIPHASE STEEL HAVING EXCELLENT PROCESSING PROPERTIES, AND METHOD FOR MANUFACTURING A STRIP OF SAID STEEL
The invention relates to a high-strength air-hardenable multiphase steel which has excellent processing properties and consists of a composition defined in claim 1 and in which, in order to allow for a process window that is as large as possible for the continuous annealing of hot and cold strips from said steel, the combined content of Mn+Si+Cr is adjusted as follows in accordance with the strip thickness obtained: up to 1.00 mm: sum of Mn+Si+Cr ≥ 2.350 and ≤ 2.500 wt% more than 1.00 and up to 2.00 mm: sum of Mn+Si+Cr > 2.500 and ≤ 2.950 wt% more than 2.00 mm: sum of Mn+Si+Cr > 2.950 and ≤ 3.250 wt%.
