The invention relates to the production of a sheet metal part by hot forming. Heating prior to hot forming is at least partly done by electric resistance heating. The invention provides for a process window which defines reliable heating rates depending on the coating weight of an aluminum-based anti-corrosion coating.
The invention relates to a tailored blank (H, H') for producing a press-hardened side-panel reinforcement (10, 10'), as well as to a press-hardened side-panel reinforcement (10, 10').
A steel component includes a steel substrate composed of a steel having 0.1-3 wt. % of Mn and optionally up to 0.01 wt. % of B, and an Al-based protective coating applied to the steel substrate. The protective coating has an overall iron- and manganese-free proportion by mass of up to 30% of additional alloy constituents, by mass of Si in the protective coating as additional alloy constituent is between 3 wt. % and 15 wt. % Si, by mass of Mg in the protective coating as additional alloy constituent is up to 1.0 wt. % Mg, and by mass of Zn in the protective coating as additional alloy constituent is between 0.4 wt. % and 25.0 wt. % Zn. The protective coating has a near-surface first Zn-rich layer having a Zn content higher than an average Zn content of the protective coating, and the Zn content of the first Zn-rich layer is more than 5 wt. %.
PROCESS FOR MANUFACTURING A FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING, AND FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING
A process for manufacturing a flat steel product having a prealloyed corrosion-resistant coating, comprises providing a coated flat steel product comprising a steel substrate having, at least on one side of the steel substrate, and an aluminum-based corrosion-resistant coating. The coated flat steel product is heat-treated, comprising the following substeps: Heating the coated flat steel product in a furnace at a furnace temperature T of between 950° C. and 1150° C. with a furnace dwell time tV of between 40 seconds and 150 seconds, the furnace temperature being chosen such that the heating rate of the coated flat steel product in the temperature range from 500° C. to 700° C. is more than 10 K/s. The coated flat steel product is held at a temperature above Ac3 for a hold time of between 20 seconds and 60 seconds.
C21D 1/76 - Adjusting the composition of the atmosphere
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
F27B 9/04 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
Provided is a high strength, cold rolled steel flat product with reduced sensitivity to hydrogen embrittlement including a steel substrate which, in % by mass, consists of C: 0.20 to 0.40%, Mn: 1.50 to 3.00%, Si: 0.90 to 1.50%, Al: 0.005 to 1.00%, V: 0.01 to 0.30%, optionally Cr: 0.01 to 1.00%, optionally Mo: 0.005 to 0.20%, optionally B: 0.00001 to 0.002%, optionally Nb and Ti the total content of Nb and Ti being 0.005 to 0.2%, P: up to 0.020%, S: up to 0.005%, N: up to 0.008%, and as the remainder Fe and unavoidable impurities, the sum of the shares of the impurities being ≤0.8%. A method for the manufacture of the high strength, cold steel flat product is also provided.
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
The invention relates to a flat steel product to be subjected to hot forming, to a shaped sheet metal blank, to a process for manufacturing the flat steel product, and to a process for manufacturing the shaped sheet metal blank, wherein the flat steel product and the sheet metal blank, in particular in combination with an aluminum-based corrosion-resistant coating, exhibit improved resistance to hydrogen embrittlement.
The invention relates to a method for operating a steelworks, for example in a blast furnace converter route, or with a direct reduction of iron ore with hydrogen with downstream electrical steel route, preferably additionally a secondary steel route. To carry out the method, the following are balanced: A) a number of starting material flows of supplied starting materials, B) a number of by-product material flows from emitted by-products, and C) a number of energy flows of used energy.
The invention relates to a tailor-made semifinished product (H) for producing a press hardened external sidewall reinforcement (10, 10') as well as to a press hardened external sidewall reinforcement (10, 10').
C23C 2/06 - Zinc or cadmium or alloys based thereon
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
The invention relates to a non-grain-oriented metal electrical strip or sheet which is characterized, in addition to its alloy composition, by a thickness of < 0.270 mm and a 0.2% proof stress Rp0.2 > 420 MPa. Another aspect of the invention relates to a method for producing a non-grain-oriented electrical strip and to a use.
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 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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
The present invention relates to a formed hollow shaft (1) made of a steel material, comprising a hollow shaft body (2) having a first wall thickness (3) which has at least in parts along its axis (A), wherein the first wall thickness (3) comprises a radially outer boundary zone (3.1), wherein the boundary zone (3.1) of the first wall thickness (3) defines a higher hardness in comparison to the remaining partial wall thickness (3.2).
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 8/10 - 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
The invention relates to a platform (10) for temporarily or permanently mounting to an existing tower structure (1) of a wind turbine, comprising: a scaffold (20) for receiving a crane; and jibs (30) for fastening the platform (10) to the tower structure (1).
B66C 23/18 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
18.
Sheet Metal Component and Method for Producing Same
A sheet metal component made of a hot-formed flat steel product including a steel substrate consisting of, in mass. %,, C: 0.1-0.4%, Mn: 0.5-3.0%, Si: 0.05-0.5% Cr: 0.005-1.0%, B: 0.0005-0.01% and optionally one or more of V, Ti, Nb, Al, Ni, Cu, Mo, and W, where the contents of the respective optionally present alloy element are: V: 0.001-0.2%, Ti: 0.001-0.1%, Nb: 0.001-0.1%, Al: 0.01-0.2%, Ni: 0.01-0.4%, Cu: 0.01-0.8% Mo: 0.002-1.0%, W: 0.001-1.0%, and the remainder iron and unavoidable impurities, wherein the unavoidable impurities include less than 0.1% P, less than 0.05% S, and less than 0.01% N, and an Al corrosion protection layer applied to the steel substrate, wherein the component is optionally hardened. An adhesive section having an SDR value of 3-30%, determined according to ISO 25178, is provided on the free outer face of the corrosion protection coating for adhering the sheet metal component to another component.
The present disclosure relates to a method of producing a coated flat steel product. The method includes; producing or providing a steel substrate; optionally degreasing; optionally deoxidizing; and applying an anticorrosion coating. The anticorrosion coating is composed of zinc or a zinc alloy and unavoidable impurities by physical vapor phase deposition to the steel substrate having a substrate temperature. The method includes subjecting the steel substrate to a vacuum treatment for a particular period of time prior to the applying of the anticorrosion coating. Moreover, the pressure on application of the anticorrosion coating is suitably limited.
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 1/38 - 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 sheets of limited length, e.g. folded sheets, superimposed sheets
21.
STEEL HAVING IMPROVED PROCESSING PROPERTIES FOR WORKING AT ELEVATED TEMPERATURES
A flat steel product for hot forming, a formed shaped sheet metal part and methods of production of the same. The flat steel product and the shaped sheet metal part have improved properties, especially in conjunction with an aluminum-based anticorrosion coating.
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
24.
STEEL SHEET WITH TEMPORARY DOUBLE-LAYERED CORROSION PROTECTION FOR AN OPTIMIZED COATING PROCESS
The invention relates to a skin-passed steel sheet which has a steel substrate and a metal coating which consists of a zinc or aluminum alloy and which is arranged on one face or on both faces of the steel substrate. The invention is characterized in that the metal coating has a temporary double-layered corrosion protection, comprising an intermediate layer, which contains an organic silicon compound, as a first layer and a second layer, which contains or consists of an anti-corrosion oil, arranged over the first layer.
The invention relates to a hot-dip coated and skin-passed steel sheet which has a steel substrate and a metal skin-passed coating which is arranged on the steel substrate and which contains an aluminum content of 0.5 to 8.0 wt.% and a magnesium content of 0.5 to 8.0 wt.% in addition to zinc and unavoidable impurities. The invention is characterized in that the metal coating has a temporary double-layered corrosion protection. The invention additionally relates to a method for producing such a steel sheet and to the use thereof in order to produce a stainless phosphatized steel sheet.
C23C 22/73 - 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 characterised by the process
C23C 2/06 - Zinc or cadmium or alloys based thereon
A flat steel product for hot forming to a formed shaped sheet metal part and processes of making same. The flat steel product and the shaped sheet metal part have improved properties, especially in conjunction with an aluminum-based anticorrosion coating.
The present disclosure relates to a process for producing an iron melt. The method includes; reducing iron ore to sponge iron, carburizing sponge iron with a carbonaceous gas, melting the carburized sponge iron and/or treating the melt produced from the carburized sponge iron. According to the present disclosure, the carbonaceous gas is at least a portion of the process gas obtained in the melting of the carburized sponge iron and/or treating of the melt produced from the carburized sponge iron that has been recycled.
C21B 13/00 - Making spongy iron or liquid steel, by direct processes
C21B 13/02 - Making spongy iron or liquid steel, by direct processes in shaft furnaces
28.
Method for Producing a Cold-Rolled Flat Steel Product Having a Bainitic Basic Structure and Cold-Rolled Flat Steel Product Having a Bainitic Basic Structure
A process for producing a cold-rolled flat steel product having a bainitic base microstructure and a correspondingly cold-rolled flat steel product having a bainitic base microstructure.
A method is described for operating a plant network (1) comprising a direct reduction plant (2) with a sluice (2') and an electric melt furnace (3). In the method, a product property is determined by means of a sensor (4), and on the basis of this, the degree of metallisation of the sponge iron in the direct reduction plant (2) is set. To carry out the method, a control device (5) can be used, for example to control a flow valve (8) via an allocation amount (7) by means of the return element indicated by reference sign (6), in order to change the degree of metallisation via the setting of the flow rate of reducing gas.
The invention relates to a phosphated flat steel product. The reflectance of the phosphated flat steel product is ≤ 0.65. The invention also relates to a hot-formed component made from the phosphated flat steel product. The layer structure of the corrosion protection coating on the steel substrate (1) of the hot-formed component according to the invention consists of an alloy layer (2), an Al base layer (3) and Si-rich phases (4), which are not bonded together and are embedded in the Al base layer (3). On the surface, there is an oxide layer with phosphorus (6). Optionally, the hot-formed component can then be phosphated.
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 22/74 - 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 characterised by the process for obtaining burned-in conversion coatings
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
The invention relates to a method for operating a system assembly which comprises an electric melting furnace and a direct reduction facility. The molten bath quantity is ascertained during the operation of the system assembly, and if a specified molten bath quantity threshold is reached or exceeded, a tapping process is carried out. Prior to the tapping process, a check is carried out in order to determine the presence of a collecting container for the melt. If no transportable collecting container is present, then the system assembly is converted from the regular operating mode into a buffer operating mode.
The invention relates to a high-strength hot-rolled flat steel product, which has a KAM value of less than 2.0° at a step width of 250 nm. The invention further relates to a method for producing a hot-rolled flat steel product.
The invention relates to a method for producing a pressed flat steel sheet part by way of a special heating method prior to forming. The invention also relates to a method for reducing refuse during the production of pressed flat steel sheet parts, in particular in the production method according to the invention.
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
F27B 9/02 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity of multiple-track typeFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity of multiple-chamber typeCombinations of furnaces
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
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
The invention relates to a flat steel product for hot working, a worked sheet metal part, a process for manufacturing the flat steel product and a process for manufacturing the worked sheet metal part, the flat steel product and the sheet metal part having improved hydrogen embrittlement resistance in particular in combination with an aluminum-based anticorrosive coating.
The present application relates to an ultra-lightweight steel wheel for a commercial vehicle. The wheel has excellent material characteristics and an advanced design, and consists of a rim for mounting a tire, and a disc having a hub flange for detachably connecting to a wheel hub or axle, wherein the rim and/or disc is made of a heat-treated and hardened steel material with a carbon content between 0.18 wt % and 0.37 wt %, and the disc and/or rim principally consists of a martensitic microstructure and has a tensile strength of at least 900 MPa. The maximum thickness of the rim is less than 4.50 mm and/or the maximum thickness of the disc is less than 12.00 mm, wherein the value of the product of the wheel diameter and the wheel width divided by the wheel mass is greater than 4000 mm2/kg.
B60B 3/00 - Disc wheels, i.e. wheels with load-supporting disc body
B60B 3/04 - Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim
B60B 21/02 - Rims characterised by transverse section
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
44.
COATING PLANT FOR COATING A PLANAR OBJECT AND A METHOD FOR COATING A PLANAR OBJECT
A coating plant for coating a planar object, for example a strip conveyed using transport rollers, is disclosed. The coating plant includes a vacuum chamber and a device for vapor deposition of a material. The device for vapor deposition includes an evaporation portion and a nozzle portion, wherein the nozzle portion includes a nozzle having a nozzle outlet. The nozzle outlet can have an extension. The nozzle is rotatably mounted.
The present disclosure relates to a method for producing steel in an integrated metallurgical plant comprising at least one direct reduction reactor for directly reducing iron ore to give sponge iron, at least one electric furnace for melting the sponge iron to give pig iron or crude steel, at least one blast furnace for smelting iron ore to give pig iron, and at least one converter for refining pig iron to give crude steel. In accordance with the invention, the process gas discharged from the direct reduction reactor is admixed at least partly to the hot blast air and/or at least partly to an optional charging material, said air and/or said material being blown into the blast furnace.
B60B 3/04 - Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim
B60B 3/10 - Disc wheels, i.e. wheels with load-supporting disc body apertured to simulate spoked wheels
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
47.
Method for marking a steel strip, and steel strip with a plurality of markers
A steel strip with a plurality of markers and a method for marking a steel strip with material properties is provided. The method comprises measuring material properties of the steel strip at a plurality of discrete strip positions. A plurality of markers are applied to the strip edge at the strip positions, each marker from the plurality of markers containing a material identifier relating to the measured material properties at the respective strip position of the marker.
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
48.
METHOD FOR OPERATING A DC ELECTRIC FURNACE FOR PRODUCING IRON SMELT AND MOLTEN SLAG
The invention relates to a method for operating a DC electric furnace (10) having at least one top electrode (11) and at least one bottom electrode (11.1) for producing iron smelt (1) and molten slag (2).
C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
C21C 5/52 - Manufacture of steel in electric furnaces
C21C 5/54 - Processes yielding slags of special composition
H05B 7/20 - Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
49.
HIGH-TENSILE STEEL HAVING IMPROVED HYDROGEN EMBRITTLEMENT RESISTANCE
The invention relates to a flat steel product for hot working, a worked sheet metal part, a process for manufacturing the flat steel product and a process for manufacturing the worked sheet metal part, the flat steel product and the sheet metal part having improved hydrogen embrittlement resistance in particular in combination with an aluminum-based anticorrosive coating.
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
A method for manufacturing a sheet metal component including: annealing a flat steel product comprising 0.05-0.5% C, 0.5-3% Mn, 0.06-1.7% Si, ≤0.06% P, ≤0.01% S, ≤1.0% Al, ≤0.15% Ti, ≤0.6% Nb, ≤0.01% B, ≤1.0% Cr, ≤1.0% Mo, ≤1.0% Cr+Mo, ≤0.2% Ca, ≤0.1% V, remainder iron and impurities in a continuous furnace under an atmosphere consisting of 0.1-15% hydrogen and remainder nitrogen with a specific dew point and temperature profile; applying a coating consisting of <15% Si, ≤5% Fe, in total 0.1-5% of at least one alkaline earth or transition metal and a remainder Al and unavoidable impurities; heating the flat steel product to >Ac3 and ≤1000° C. for a time sufficient to introduce a heat energy quantity >100,000-800,000 kJs; hot-forming the flat steel product to form the component; and cooling at least one section of the component at a cooling rate sufficient to generate hardening structures.
The present disclosure relates to a hot-dip-coated steel sheet having a Zn—Mg—Al coating which includes aluminum at between 0.1 and 8.0 wt %, magnesium at between 0.1 and 8.0 wt %, the balance being zinc and unavoidable impurities, wherein the coating comprises zinc grains and further phases of magnesium and/or aluminum and also eutectic structures including at least intermetallic zinc-magnesium phases, wherein a native oxide layer is formed on the coating. In accordance with the present disclosure, the coating beneath the native oxide layer has an area fraction of at least 35% in which there is an average nanohardness of at least 4 GPa.
The invention relates to a flat steel product for hot forming, consisting of a steel substrate which consists of a steel having 0.1-3 wt % of Mn and optionally up to 0.01 wt % of B, and of an Al-based protective coating applied to the steel substrate. The iron-free mass fraction in the protective coating of Mg as additional alloy constituent adds up to less than 2.50% Mg. In addition, the iron-free mass fraction in the protective coating of Mn as additional alloy constituent adds up to more than 0.30% Mn and the iron-free mass fraction in the protective coating of Si as additional alloy constituent adds up to less than 1.80%.
C21C 5/52 - Manufacture of steel in electric furnaces
C21C 5/54 - Processes yielding slags of special composition
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
H05B 7/20 - Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
54.
COATED FLAT STEEL PRODUCT AND METHOD FOR THE PRODUCTION THEREOF
The present disclosure relates to a flat steel product having a tensile strength Rm of at least 800 MPa and coated with a metal covering, wherein the metal covering consists of a system having the elements zinc and manganese and having been deposited from the gas phase. Furthermore, the present disclosure also relates to a method for its production.
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
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
C21D 7/02 - Modifying the physical properties of iron or steel by deformation by cold working
C21D 7/13 - Modifying the physical properties of iron or steel by deformation by hot working
A flat steel product includes a steel substrate having an anticorrosion coating present at least on one side of the steel substrate and made of zinc or a zinc alloy. This anticorrosion coating, on the surface remote from the steel substrate, has zinc nanocrystals having an average diameter of less than 500 nm. A process for producing such an anticorrosion coating includes producing or providing a steel substrate, continuously introducing the steel substrate into a coating chamber at a reduced pressure, applying an anticorrosion coating on the steel substrate by physical vapor deposition, and continuously discharging the steel substrate from the coating chamber.
The invention relates to a molded sheet-metal part which is formed from a steel sheet-metal blank, comprising a steel substrate (1) which consists of steel that has 0.1-3 wt.% of Mn and optionally up to 0.01 wt.% of B. The molded sheet-metal part has an aluminum-based corrosion protection coating on at least one face and is characterized in that the value of the hardness gradient of the corrosion protection coating and the steel substrate perpendicularly to the surface of the steel substrate is less than 1.7 GPa/µm. The invention additionally relates to a method for producing such a molded sheet-metal part.
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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 38/20 - 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 38/26 - 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
57.
DETERMINISTICALLY TEXTURED WORKING ROLL FOR USE IN A COLD-ROLLING MILL, METHOD FOR PRODUCING A DETERMINISTICALLY TEXTURED WORKING ROLL FOR USE IN A COLD-ROLLING MILL, AND COLD-ROLLING MILL
The invention relates to a deterministically textured working roll (1) for use in a cold-rolling mill, to a method for producing a deterministically textured working roll (1) for use in a cold-rolling mill and to a cold-rolling mill.
The present disclosure relates to a method for producing a semifinished product with modified surface, comprising at least one method step of at least regionally modifying the surface of a coated, skin-pass-rolled, oiled, cleaned metallic steel substrate via low-pressure or atmospheric-pressure plasma treatment of said surface regions with oxygen, argon or a mixture of oxygen and argon as process gas. The present disclosure further relates to the accordingly produced semifinished products and/or flat steel products, optionally formed semifinished products and/or flat steel products, and also to their use.
A coating system for coating a strip, for example a steel strip, with a material present in the gas phase includes a coating chamber, a device for vapor deposition of the material, and a strip positioning assembly for correcting the strip transport. The strip positioning assembly has a first guide roller and a second guide roller pivoting about a pivot point, which can be effected with an adjustment unit. A method for coating a strip is also provided.
The invention relates to a non-grain-oriented metal electrical steel strip or sheet, consisting of the components named below, in each case in percent by weight, in short: wt.%: C: 0.0005 to 0.0040; Si: 3.2 to 3.4; Al: 0.85 to 1.05; Mn: up to 0.2; P: up to 0.040, preferably up to 0.020; S: up to 0.0030; N: up to 0.0020; Ti: up to 0.0040; Mo+Nb+V+Zr+Sb+Sn+Cu+Cr+Ni: up to 0.1; residual Fe and unavoidable impurities. The electrical steel strip or sheet has a thickness of < 0.265 mm and a 0.2% yield strength Rp0.2 > 420 MPa. The invention also relates to a method and to a use.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object
G01B 11/30 - Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
65.
SURFACE MODIFICATION OF A ZINC-BASED METAL COATING IN A HOT-DIP COATING PROCESS
The invention relates to a striplike or sheetlike steel substrate hot-dip-coated with a metallic coating based on zinc and having a modified surface, and to a method for producing a semifinished product with modified surface, comprising at least one method step of at least regionally modifying the surface of a coated, skin-pass-rolled, oiled and cleaned metallic steel substrate by means of atmospheric-pressure plasma treatment of said surface regions with oxygen, air, forming gas or a mixture of 2 or more of these gases as process gas. The invention further relates to the accordingly produced semifinished products and/or flat steel products, optionally formed semifinished products and/or flat steel products, and to their use.
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
A cold-rolled flat steel product has a tensile strength of 750-940 MPa, a high strength, an improved weldability and optimized shaping properties, and can be produced at low cost. The cold-rolled flat steel product consists of a steel composed, in percent by mass, of C: 0.040-0.100%; Mn: 2.10-2.50%; Si: 0.10-0.40%; Cr: 0.30-0.90%; Ti: 0.020-0.080%, B: 0.0005-0.0020%; N: 0.003-0.010%; Al: up to 0.10%; Ca: up to 0.005%; P: up to 0.025%; S: up to 0.010%; optionally one or more of the following elements: Mo: up to 0.20%; Nb: up to 0.050%; Cu: up to 0.10%; V: up to 0.020%; Ni: up to 0.10%, the remainder being iron and unavoidable impurities, and total content of impurities is limited to at most 0.5% by mass and contents of phosphorus (“P”) and sulfur (“S”) belong to the impurities.
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
The invention relates to a flat steel product for producing a steel component by hot forming, comprising a steel substrate, which consists of a steel having 0.1-3 wt.% Mn and optionally up to 0.01 wt.% B, and an aluminium-based anticorrosion coating deposited on the steel substrate, wherein an absorption layer comprising carbon particles is arranged on the anticorrosion coating. The invention further relates to a method for producing a flat steel product according to the invention, and to the use of carbon particles in an absorption layer on a flat steel product coated with an aluminium-based anticorrosion coating, in order to reduce the reflectivity in the infrared region. The invention also relates to a method for producing a sheet metal part from a flat steel product according to the invention.
2. In addition, the coating has an Al base layer consisting of 1.0-15% by weight of Si, optionally 2-4% by weight of Fe, 0.1-5.0% by weight of alkali metals or alkaline earth metals, and optional further constituents, the contents of which are limited to a total of not more than 2.0% by weight, and aluminium as the balance.
The method includes providing a computer model for producing the desired metal workpiece from the flat metal product in a processing procedure, the processing procedure including processing step on the flat metal product by a processing device, receiving technical data record characterizing the flat metal product, at least part of the data of the technical data record having been recorded during the production of the flat metal product, passing the technical data record to the input of the computer model, based on the passing of the technical data record, receiving a model value for an operating parameter of the processing device from the output of the computer model, producing the desired metal workpiece by controlling the processing procedure, the control of the processing procedure including a controlling of the processing device to perform the processing step on the flat metal product using the operating parameter set to the model value.
B23P 13/02 - Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
B23P 17/04 - Metal-working operations, not covered by a single other subclass or another group in this subclass characterised by the nature of the material involved or the kind of product independently of its shape
B23P 23/06 - Metal-working plant comprising a number of associated machines or apparatus
B23Q 41/08 - Features relating to maintenance of efficient operation
C23C 2/00 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shapeApparatus therefor
LASER-TEXTURED WORKING ROLLER FOR USE IN A COLD ROLLING MILL, AND METHOD FOR PRODUCING A LASER-TEXTURED WORKING ROLLER FOR USE IN A COLD ROLLING MILL, AND COLD ROLLING MILL
The invention relates to a laser-textured working roller (1) for use in a cold rolling mill, comprising a surface (2) which has a topography (3) comprising multiple longitudinal grooves (3.1) that are juxtaposed in the circumferential direction (U) of the working roller (1), wherein multiple grooves (3.2) juxtaposed over the circumference of the working roller (1) are distributed between each pair of juxtaposed longitudinal grooves (3.1), wherein each of said multiple grooves connects the two juxtaposed longitudinal grooves (3.1) and is arranged in a slanted manner between the two juxtaposed longitudinal grooves (3.1). The invention additionally relates to a method for producing a laser-textured working roller (1) and to a cold rolling mill.
The invention relates to a steel plate made of a hardenable steel material and coated with a hot-dip aluminized coating for hot forming, wherein the surface of the hot-dip aluminized coating has an SDR value of at least 3.0%, wherein the hot-dip aluminized coating has a deterministic surface structure.
The invention relates to a semi-finished product (1) for hot forming, the product being a tailor-welded blank, a tailor-rolled blank or a patch-work blank, wherein the semi-finished product (1) comprises one first section or multiple first sections having a first thickness (d1) and at least one second or multiple second sections having a second thickness (d2), the first thickness (d1) being less than the second thickness (d2), wherein the semi-finished product (1) comprises a steel sheet (2) which is coated with an aluminum-based overcoat (2.1) at least in the section having the second thickness (d2), and wherein the semi-finished product (1) has a deterministically formed surface structure at least in the section having the second thickness (d2) with the aluminum-based overcoat (2.1).
The invention relates to an electric motor comprising a motor housing (1) and a stator (3) arranged in the motor housing (1), wherein an insulation element (2) is arranged between the stator (3) and housing (1), wherein the insulation element (2) consists of a composite material that is formed from at least two different materials.
The present invention relates to a method for producing a cold-rolled flat steel product having a ferritic primary structure and carbide precipitates based on Ti, Nb and/or V embedded in the ferritic primary structure.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
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 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C23C 2/06 - Zinc or cadmium or alloys based thereon
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
81.
STEEL HAVING IMPROVED PROCESSING PROPERTIES FOR WORKING AT ELEVATED TEMPERATURES
The invention relates to a steel flat product for hot forming and a sheet metal moulded part produced therefrom. The steel substrate of the steel flat product and the sheet metal formed part has increased contents of aluminium and vanadium. In a preferred variant, the steel substrate contains cerium and lanthanum.
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
82.
PROCESS FOR MANUFACTURING AN IRON MELT AND LIQUID SLAG IN AN ELECTRIC SMELTER
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
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
84.
Sheet steel having a deterministic surface structure
The invention relates to a sheet steel (1) coated with a zinc-based coating and skin-pass rolled with a deterministic surface structure (2), and to a method for producing it.
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C21D 7/04 - Modifying the physical properties of iron or steel by deformation by cold working of the surface
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
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
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
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
B32B 3/26 - 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 particular shape of the outline of the cross-section of a continuous layerLayered 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 layer with cavities or internal voids
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 3/30 - 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 particular shape of the outline of the cross-section of a continuous layerLayered 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 layer with cavities or internal voids characterised by a layer formed with recesses or projections, e.g. grooved, ribbed
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
C21D 9/48 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals deep-drawing sheets
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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
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
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
A method for producing an electromagnetic component for an electric machine is provided. The method includes providing a metal sheet as a starting material; punching out a number of lamellae from the metal sheet; heat-treating the lamellae; and joining the heat-treated lamellae to form the component or a portion of the component. The electromagnetic component to be produced can be a laminated core, for example a stator core or a rotor core, and can be provided for use with the electric machine such as an electric motor.
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
C21C 5/52 - Manufacture of steel in electric furnaces
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
The invention relates to a method for setting an oven atmosphere in a directly heated heat-treatment oven, wherein the heat-treatment oven has at least one burner, which is operated with a fuel gas and an oxygen-containing gas, which are burned to form a combustion gas, wherein, dependent on the composition of the fuel gas and the composition of the oxygen-containing gas and the mixture thereof, the combustion gas has a defined composition with a defined water vapour partial pressure, wherein hydrogen is used in the fuel gas in a proportion of at least 10% by volume, and the heat-treatment oven is additionally flooded with a water-vapour-free and/or hydrogen-free gas, wherein, as a result, the water-vapour-free and/or hydrogen-free gas mixes with the combustion gas in such a way as to bring about a water vapour partial pressure of the mixture in the oven atmosphere of the heat-treatment oven that is less than the defined water vapour partial pressure of the combustion gas.
A method of producing pig iron in a shaft furnace is provided. The shaft furnace is charged in an upper region with raw materials which fall within the shaft furnace under the influence of gravity. A portion of the raw materials is melted and/or partly reduced under the action of the atmosphere that exists within the shaft furnace. A hot gas stream which is introduced in a lower region of the shaft furnace flows through and influences the atmosphere that exists within the shaft furnace in terms of chemical composition and temperature. A cold gas stream is fed to a heat exchanger in which the cold gas stream is heated to a temperature higher than 700° C. to give a hot gas stream. The cold gas stream comprises a CO2 component of at least 5% by volume. The cold gas stream may contain, air and/or pure oxygen as residual component.
The invention relates to a vehicle having a reinforced rocker panel (10). The rocker panel (10) comprises a profiled element (1) having a closed cross-section, and the profiled element (1) has a profile wall toward the interior (1.1) and a profile wall toward the exterior (1.2) of the vehicle, and the profiled element (1) is reinforced with at least one undulating reinforcement (2) along the y-axis of the vehicle. The waves of the undulating reinforcement (2) extend along the x-axis of the vehicle, and the height extent of the waves of the undulating reinforcement (2) runs along the z-axis of the vehicle. The undulating reinforcement (2) does not extend completely between the profile walls (1.1, 1.2) along the y-axis of the vehicle, and therefore, in the plane (E) of the undulating reinforcement (2), there is a clearance (F) toward the profile wall of the interior (1.1) within the cross-section of the profiled element (1), said clearance having an extent (D) along the y-axis of the vehicle which is at least 15% of the distance (1.3) between the profile walls (1.1, 1.2).
B62D 21/15 - Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
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
94.
Flat steel product having an improved zinc coating
The present disclosure relates to a flat steel product comprising a steel substrate with, present at least on one side of the steel substrate, anticorrosion coating composed of zinc and unavoidable impurities. This anticorrosion coating has continuous microchannels which connect the steel substrate to an ambient atmosphere. Additionally, the present disclosure relates to a process for producing a flat steel product of this kind.
C23C 2/06 - Zinc or cadmium or alloys based thereon
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
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C23C 14/00 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
C25D 7/00 - Electroplating characterised by the article coated
B21B 1/00 - 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
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
G01B 11/00 - Measuring arrangements characterised by the use of optical techniques
97.
HIGH STRENGTH, COLD ROLLED STEEL WITH REDUCED SENSITIVITY TO HYDROGEN EMBRITTLEMENT AND METHOD FOR THE MANUFACTURE THEREOF
According to the invention a high strength, cold rolled steel flat product with reduced sensitivity to hydrogen embrittlement comprises a steel substrate which, in % by mass, consists of C: 0.20 to 0.40 %, Mn: 1.50 to 3.00 %, Si: 0.90 to 1.50 %, Al: 0.005 to 1.00 %, V: 0.01 to 0.30 %, optionally Cr: 0.01 to 1.00 %, optionally Mo: 0.005 to 0.20 %, optionally B: 0.00001 to 0.002 %, optionally Nb and Ti the total content of Nb and Ti being 0.005 to 0.2 %, P: up to 0.020 %, S: up to 0.005 %, N: up to 0.008 %, and as the remainder Fe and unavoidable impurities, the sum of the shares of the impurities being ≤ 0.8 %, and exhibiting a microstructure comprising, in % by area, 65 to 92 % primary (tempered) martensite and at least 8% retained austenite (RA), the remainder being filled by up to 27 % of secondary (untempered) martensite, up to 10 % of bainite or bainitic ferrite, and/or up to ≤ 5 % polygonal ferrite, the sum of the shares of the secondary (untempered) martensite, the bainite or bainitic ferrite and the polygonal ferrite being ≤ 27 %. The invention also provides a method which permits a reliable manufacture of such a steel flat product.
The invention relates to a method for producing a shaped sheet metal part comprising one first and one second zone having different material properties, such as a shaped sheet metal part.
A flat steel product is provided, including a steel substrate made of a steel which consists of, in % by weight, 0.07-0.4% C, 1.0-2.5% Mn, 0.06-0.9% Si, ≤0.03% P, ≤0.01% S, ≤0.1% Al, ≤0.15% Ti, ≤0.6% Nb, ≤0.005% B, ≤0.5% Cr, 50.5% Mo, where the sum of Cr and Mo is ≤0.5%, and, as the remainder, Fe and unavoidable impurities, and including an anti-corrosion coating which is formed from, in % by weight, ≤15% Si, ≤5% Fe, ≤5% of at least one alkaline earth or transition metal and, as the remainder, Al and unavoidable impurities. If the anti-corrosion coating contains ≤0.1% by weight of the alkaline earth or transition metal, a solution containing at least one alkaline earth or transition metal is applied to the anti-corrosion coating of the flat steel product. Then, the flat steel product is flexibly cold-rolled to produce the portions of different thicknesses. Then, it is heated to 800-1000° C. in an atmosphere with >15% by volume O2 until an amount of thermal energy Js of >44,000 kJs and ≤400,000 kJs has been introduced.
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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
