A steel sheet includes a predetermined composition, in which a microstructure at a ¼ thickness position from a surface in a sheet thickness direction includes, by vol %, ferrite: 80% or more, martensite: 2% or less, and residual austenite: 2% or less, a proportion of unrecrystallized ferrite in the ferrite of 5% or less, and in the microstructure of the steel sheet stretched by 10% at the ¼ thickness position from the surface in the sheet thickness direction, a number density of voids having a maximum diameter of 1.0 μm or more is 1.0×109 pieces/m2 or less.
This steel member has a chemical composition containing, in terms of mass%, 0.26%-0.40% of C, 0%-2.00% of Si, 0.001%-3.000% of Mn, 0.100% or less of P, 0.0100% or less of S, 0.001%-1.000% of Al, 0.020% or less of N, 0.010% or less of O, and 0.410%-2.000% of V, wherein when the position at 1/4 of the thickness from a surface in the thickness direction is referred to as the 1/4-depth position, the steel member has a V-based precipitate in a metal structure at the 1/4-depth position; and among the V-based precipitate, the V content contained in a V-based precipitate having a maximum diameter of less than 500 nm is 0.005 mass% or more, and the V content contained in a V-based precipitate having a maximum diameter of 500 nm or more is 0.010 mass% or more.
This solid wire comprises an outer skin and a flux, and has a Vickers hardness Hv of 180-500, an fcc ratio of at least 70% as obtained by a magnetic induction method, and a chemical composition of C: 0-0.650%, Si: 0.03-0.50%, Mn: 4.1-30.0%, P: 0.050% or less, S: 0.050% or less, Cu: 0-5.0%, Ni: 1.0-30.0%, Cr: 0-10.0%, Mo: 0-10.0%, Nb: 0-1.00%, V: 0-1.00%, Co: 0-1.00%, Pb: 0-1.00%, Sn: 0-1.000%, Al: 0-0.10%, Ti: 0-0.10%, Ta: 0-1.00%, Hf: 0-1.00%, W: 0-30.00%, Mg: 0-0.50%, REM: 0-0.50%, Zr: 0-5.00%, B: 0-0.1000%, N: 0-0.500%, and O: 0.0500% or less, with the balance being Fe and impurities.
This steel member has a chemical composition containing, in terms of mass%, 0.41%-0.65% of C, 0%-2.00% of Si, 0.001%-3.000% of Mn, 0.100% or less of P, 0.0100% or less of S, 0.001%-1.000% of Al, 0.020% or less of N, 0.010% or less of O, and 0.050-2.000% of V, wherein when the position at 1/4 of the thickness from a surface in the thickness direction is referred to as the 1/4-depth position, the steel member has a V-based precipitate in a metal structure at the 1/4-depth position; and among the V-based precipitate, the V content contained in a V-based precipitate having a maximum diameter of less than 500 nm is 0.003 mass% or more, and the V content contained in a V-based precipitate having a maximum diameter of 500 nm or more is 0.015 mass% or more.
Disclosed is a technique by which hot direct reduced iron having a heightened carbon concentration is produced through a direct reduction process. This method for producing hot direct reduced iron comprises: a reduction step in which a reducing gas is brought into contact with an iron oxide feedstock to obtain iron metal; and a cooling step in which the iron metal is carbonized while being cooled, thereby obtaining hot direct reduced iron. The cooling step comprises a first step, in which after the reduction step, methane gas is brought into contact with the iron metal, and a second step, in which after the first step, CO gas is brought into contact with the iron metal. In the second step, the iron metal in contact with the CO gas has a temperature of 400-700°C. In the second step, the proportion of the volume of a discharge gas that is discharged from the system to the volume of the gas that is supplied is 40% or higher.
A Zn—Al—Mg-based hot-dip plated steel sheet includes a steel sheet and a hot-dip plated layer formed on a surface of the steel sheet, in which the hot-dip plated layer contains, as an average composition, Al: more than 10 to 22 mass % and Mg: 1.0 to 10 mass %, with a remainder including Zn and impurities, and in a case where a 5 mm square cross section parallel to a surface of the hot-dip plated layer is exposed at any position of a 3t/4 position, a t/2 position, and a t/4 position from the surface with a thickness of the hot-dip plated layer represented by t, an area fraction of a [Zn phase] of a plating microstructure in at least one of the cross sections is less than 20%.
This solid wire has a Vickers hardness Hv of 180-500, an fcc ratio of at least 70% as obtained by a magnetic induction method, and a chemical composition, in mass % with respect to the total mass of the solid wire, C: 0-0.650%, Si: 0.03-0.50%, Mn: 4.1-30.0%, P: 0.050% or less, S: 0.050% or less, Cu: 0-5.0%, Ni: 1.0-30.0%, Cr: 0-10.0%, Mo: 0-10.0%, Nb: 0-1.00%, V: 0-1.00%, Co: 0-1.00%, Pb: 0-1.00%, Sn: 0-1.000%, Al: 0-0.10%, Ti: 0-0.10%, Ta: 0-1.00%, Hf: 0-1.00%, W: 0-30.00%, Mg: 0-0.50%, REM: 0-0.50%, Zr: 0-5.00%, B: 0-0.1000%, N: 0-0.500%, and O: 0.0500% or less, with the balance being Fe and impurities.
This steel member, when a position that is 1/4 of the thickness thereof from the surface in the thickness direction is defined as a 1/4 depth position, has V-based deposits in the metal structure at the 1/4 depth position. Among the V-based deposits, the V content for V-based deposits having a maximum diameter of less than 500 nm is 0.005 mass% or more, and the V content for V-based deposits having a maximum diameter of 500 nm or more is 0.010 mass% or more. When the C content is measured by using GDS in the thickness direction from the surface and the distance from the surface to a position at which the C content firstly becomes 0.95-fold or more of the C content in the chemical composition is defined as a decarburization depth, the decarburization depth is 15 µm or more. The maximum C content in a range from the surface to 10 µm in the thickness direction is 0.80-fold or less of the C content in the chemical composition.
Heating parts (212a to 212l, 222a to 222l) are brought into contact with planned heating regions (11a to 11l) of outermost electrical steel sheets (10a, 10b) of an electrical steel sheet group (100), to simultaneously pressurize and heat the planned heating regions (11a to 11l).
The purpose of the present disclosure is to provide a method for producing a sintered ore, said method being capable of suppressing reductions in the product yield and production rate of a sintered ore. A method for producing a sintered ore according to the present disclosure includes: a granulation step for obtaining a granulated material including at least a sintering raw material, a setting material, and a return ore; and a sintering step for sintering the granulated material. A first carbonaceous material is added as the setting material before the latter half of the granulation step, a second carbonaceous material is added as the setting material in the latter half of the granulation step, the return ore is added from the latter half of the granulation step to the sintering step, the first carbonaceous material includes a highly combustible carbonaceous material having a combustion start temperature of 550°C or less, and the second carbonaceous material includes a low-combustible carbonaceous material having a combustion start temperature of more than 550° C.
Provided is a steel material providing high strength and excellent low-temperature toughness in a component for a machine structure. The steel material according to the present disclosure has a chemical composition containing, in terms of mass%, 0.20%-0.48% of C, 0.20%-1.30% of Si, 0.80%-2.00% of Mn, 0.050% or less of P, 0.010%-0.090% of S, 0.05%-0.50% of Cr, 0.05%-0.30% of V, 0.0001%-0.0055% of Ti, 0.005%-0.050% of Al, 0.003%-0.030% of N, 0.0001%-0.0050% of Ca, and 0.0030% or less of O, with the balance being Fe and impurities, wherein: the number density ND of coarse inclusions having an equivalent circle diameter of 3.0 μm or more is 0.70 or less per 1 mm2; and the number ratio NR of coarse specific inclusions in which the Mn content, the Al content, the Ti content, and the V content in terms of mass% satisfy formula (1) among the coarse inclusions is 75% or less. (1): (Mn + Al)/(Ti + V) < 0.30
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/30 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for crankshaftsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for camshafts
12.
LID BODY, METHOD FOR MANUFACTURING METAL CAN, METAL CAN, AND BATTERY
A wound core in which the average distance of first-group joint portions and the average distance of second-group joint portions determined under predetermined conditions are 25 mm or more.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
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
14.
WELD METAL, WELD JOINT, AND WELD STRUCTURAL OBJECT
A weld metal including C: 0.030% to 1.000%, Si: from 0.03% to 0.50%, Mn: 4.1% to 30.0%, P: 0% to 0.050%, S: 0% to 0.050%, Cu: 0% to 5.0%, Ni: 1.0% to 30.0%, Cr: 0% to 20.0%, Mo: 0% to 10.0%, Nb: 0% to 1.000%, V: 0% to 1.00%, Co: 0% to 1.00%, Pb: 0% to 1.00%, Sn: 0% to 1.00%, W: 0% to 20.0%, Mg: 0% to 5.0%, Al: 0% to 0.100%, Ca: 0% to 5.0%, Ti: 0% to 0.100%, B: 0% to 0.5000%, REM: 0% to 0.500%, Zr: 0% to 0.500%, N: 0% to 0.5000%, O: 0.0010% to 0.1500%, and balance: Fe and impurities, wherein, Mn+Ni: 5.0% or more, and Nb+Ti+V+Al: 0.005% or more.
This invention provides a surface-treated steel material having high corrosion resistance and a low sliding coefficient. The present invention relates to a surface-treated steel material in which a steel material, a plating layer containing Zn, and a film are arranged in this order. The film contains trivalent Cr and an organic silicon compound, and the trivalent Cr concentration in the film is 0.30 mass% to 15.0 mass%.
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 22/30 - 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 hexavalent chromium compounds containing also trivalent chromium
In one slot (1121a, 1121b, 1221a, 1221b), first copper pipes (1111a to 1111f, 1211a to 1211f) and a second copper pipe (1111g, 1111h, 1211g, 1211h) are arranged. At each position (each y-coordinate) in a heating length direction in the one slot, the first copper pipe is at a position closest to a conductor plate M. In the one slot, the second copper pipe is at a position close to the conductor plate M relative to at least one first copper pipe. In the one slot, there is at least one second copper pipe electrically connected in series to the first copper pipe.
This surface-treated steel material has: a steel material; and a plating layer that contains Zn and is formed on at least part of a surface of the steel material. When the portion of the surface of the steel material where the plating layer is not formed is referred to as a non-plated portion, a compound containing Zn and Mg is present in at least part of the non-plated portion. In a first region central portion, which is the central portion between a first boundary and a second boundary in the thickness direction, the ratio Mg/Zn, which is the atomic ratio of Mg to Zn, is 0.090 or more. In a second region central portion, which is the central portion between the second boundary and the surface of the compound in the thickness direction, the ratio Mg/Zn, which is the atomic ratio of Mg to Zn, is less than 0.090.
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
Provided is a screw joint capable of suppressing scratches and seizure caused by misalignment during fastening work while employing a doping-free technique. A screw joint (100) comprises a pin (10) including a tapered male screw part (11), and a box (20) including a tapered female screw part (21). The female screw part (21) has a screw taper that is constant over the entire length thereof. The male screw part (11) is divided into a complete screw part (11a) and an incomplete screw part (11b). The complete screw part (11a) has a screw taper equivalent to the screw taper of the female screw part (21). The incomplete screw part (11b) has a screw taper smaller than the screw taper of the complete screw part (11a). The inner peripheral surface of the box (20) is covered with a metal plating layer. The metal plating layer has a hardness higher than the hardness of the base material of the pin (10). The metal plating layer is covered with a solid lubrication film.
This member for an automobile comprises a punching end surface made of a steel material, wherein the residual stress σ measured at a position located at one-sixth of the plate thickness from a die-side surface in a plate thickness direction of the punching end surface, and the tensile strength TS of the steel material satisfy σ/TS ≥ 0.18.
A welded joint 10 is a welded joint 10 in which a first steel sheet 1 and a second steel sheet 2 having a plating layer 4 at least on a part thereof are welded, Expression (1) is satisfied, where La is a length of a grain boundary at which an Fe—Al phase is present in grain boundaries and Lz is a length of a grain boundary at which an Fe—Zn phase is present in the grain boundaries, and an area ratio of an Mg—Zn phase in the plating layer 4 of a region from a starting point S to a position 1,000 μm away from the starting point S is 5% or more.
A welded joint 10 is a welded joint 10 in which a first steel sheet 1 and a second steel sheet 2 having a plating layer 4 at least on a part thereof are welded, Expression (1) is satisfied, where La is a length of a grain boundary at which an Fe—Al phase is present in grain boundaries and Lz is a length of a grain boundary at which an Fe—Zn phase is present in the grain boundaries, and an area ratio of an Mg—Zn phase in the plating layer 4 of a region from a starting point S to a position 1,000 μm away from the starting point S is 5% or more.
La
/
(
La
+
Lz
)
×
100
≥
20
(
1
)
B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
B23K 26/322 - Bonding taking account of the properties of the material involved involving coated metal parts
B23K 35/22 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
Provided is a steel sheet that is characterized by having a prescribed chemical composition and a metal structure that is, by area%, 40%–80% ferrite, 15%–55% bainite, and 5%–20% martensite, the ferrite including TiC precipitates that have a diameter of 2.0–8.0 nm at a number density of at least 1.0×1016/cm3, and the standard deviation of the hardness of the ferrite and the bainite being no more than 0.40 GPa. Also provided are a component that includes the steel sheet and a production method for the steel sheet.
This high carbon cold-rolled steel sheet has a chemical composition that contains, in terms of mass%, 0.65%-0.80% of C, 0.15%-0.50% of Si, 0.40%-0.80% of Mn, 0.020% or less of P, 0.0015% or less of S, 0.010%-0.065% of Al, more than 0.40% and 0.60% or less of Cr, 0.0005%-0.0030% of Ca, 0.0040% or less of O, and 0.0100% or less of N, with the balance being Fe and impurities, wherein the Vickers hardness of a surface is 530 Hv or more, the area fraction of the pearlite structure is 95% or more, the lamellar spacing of the pearlite structure is 20-50 nm, and when the sheet thickness is denoted as t, the number density of a single inclusion of any of an oxide, sulfide, and nitride having an average particle diameter of 1.0-10.0 μm, or a composite inclusion in which two or more kinds of said single inclusions are combined is 3.0 or less per 1 mm2 in a 1/4t plane.
This aluminum-plated steel sheet for hot stamping comprises a steel sheet, an aluminum plating layer disposed on a surface of the steel sheet, and a coating film disposed on the aluminum plating layer, wherein: the Al content of the aluminum plating layer is 60 mass % or more; the thickness t1 of the aluminum plating layer is 10-60 μm; the amorphous ratio in the coating film is 90% or more in terms of area ratio; the coating film contains one or more elements selected from group A elements consisting of Ce, Nb, Mo, W, and V; and the thickness t2 of the coating film is 0.005-5.5 μm.
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
This hot-stamped part comprises a steel sheet, an Al-Fe alloy plating layer disposed on a surface of the steel sheet, an Al oxide layer disposed on a surface of the Al-Fe alloy plating layer, and a film disposed on a surface of the Al oxide layer. The film contains an amphoteric oxide of a d block element. When the average particle diameter of the amphoteric oxide is noted as Bs in unit of nm and the thickness of the Al oxide layer X is noted as Xt in unit of nm, Bs/Xt is 0.010 to 2.000.
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
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
A welded joint 10 is a welded joint 10 in which a first steel sheet 1 and a second steel sheet 2 having a plating layer 4 at least on a part thereof are welded, in a back surface A of a surface having the weld bead portion 3, Expression (1) is satisfied, where L0 is a horizontal length of an observation field and L is a surface unevenness length of the plating layer 4 in the observation field, and an area ratio of an Mg—Zn phase in the plating layer 4 of the region from a starting point to a position 1,000 μm away from the starting point is 5% or more.
A welded joint 10 is a welded joint 10 in which a first steel sheet 1 and a second steel sheet 2 having a plating layer 4 at least on a part thereof are welded, in a back surface A of a surface having the weld bead portion 3, Expression (1) is satisfied, where L0 is a horizontal length of an observation field and L is a surface unevenness length of the plating layer 4 in the observation field, and an area ratio of an Mg—Zn phase in the plating layer 4 of the region from a starting point to a position 1,000 μm away from the starting point is 5% or more.
(L−L0)/L0×100≥3 (1)
C22C 30/00 - Alloys containing less than 50% by weight of each constituent
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
This welded joint 10 is such that a second steel plate 2 and a first steel plate 1 having a plating layer 4 on at least a portion thereof are welded. When a cross section orthogonal to an extension direction of a weld bead portion 3 is observed, and a coating start position of the plating layer 4 is defined as a start point S in a direction D that is orthogonal to the extension direction of the weld bead portion 3 and separates from a stop end E of the weld bead portion, the length of a crystal grain boundary where an Fe-Al phase exists in the crystal grain boundary is defined as La in a region from the start point S to a position of 1000 μm and in a surface layer region that is a region from the surface of the first steel plate 1 to a position of 50 μm, and the length of the crystal grain boundary where an Fe-Zn phase exists in the crystal grain boundary is defined as Lz, expression (1) is satisfied, and the areal percentage of an Mg-Zn phase in the plating layer 4 in the region from the start point S to the position of 1000 μm is 5% or greater. (1): La/(La+Lz)×100 ≥ 20
Provided is a threaded joint having improved sealability without reducing seizure resistance. A threaded joint 10 comprises a pin 30 and a box 40. The pin 30 includes a tapered male thread 31, and the box 40 includes a tapered female thread 41. At least one of the outer peripheral surface of the pin 30 and the inner peripheral surface of the box 40 is covered with a solid coating containing a polymer material. At least one of a space between a male thread top face 32 and a female thread bottom face 43, and a space between a male thread bottom face 33 and a female thread top face 42 is closed off by the solid coating. A gap is present between a male thread insertion flank face 34 and a female thread insertion flank face 44, and/or between a male thread load flank face 35 and a female thread load flank face 45. A compound grease for fastening the threaded joint is present between the outer peripheral surface of the pin 30 and the inner peripheral surface of the box 40.
2211221111 with respect to the surface of the steel material being 30-80%, the plating layer being Sn plating containing 0.5-10.0 at% Zn, and the adhered amount of the plating layer being 20 g/m2to 50 g/m2.
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
A grain oriented electrical steel sheet includes a base steel sheet, an oxide layer, and a tension-insulation coating. When a glow discharge spectroscopy is conducted in a region from a surface of the tension-insulation coating to an inside of the base steel sheet, a sputtering time Fe0.5 at which a Fe emission intensity becomes 0.5 times as compared with a saturation value thereof and a sputtering time Fe0.05 at which a Fe emission intensity becomes 0.05 times as compared with the saturation value satisfy 0.01<(Fe0.5—Fe0.05)/Fe0.5<0.35. Moreover, a magnetic flux density B8 in a rolling direction of the grain oriented electrical steel sheet is 1.90 T or more.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Disclosed is a steel sheet in which use of Ni and Mo is reduced, the steel sheet having excellent resistance to gas cutting cracks, and achieving both toughness and hardness after reheating quenching. This steel sheet is characterized by comprising a certain element and having a hardness of 220 HV10 or less in an L-direction cross-section at a position of 1 mm from a surface in the thickness direction.
22 - is detected by time-of-flight secondary ion mass spectrometry is 1.20-5.00 mm per 100 μm × 100 μm, and the B segregation degree at the prior austenite grain boundary is 40 or greater.
This structural member is a structural member including a plurality of high strength steel pipes, in which the high strength steel pipe has a quenched portion in a pipe center portion and a non-quenched portion extending over a whole circumference of at least one pipe end portion, in the quenched portion, an area ratio of a martensite is 90% or more, in the non-quenched portion, an area ratio of a ferrite is 30% or more and 100% or less, an area ratio of a pearlite is 0% or more and 70% or less, and a total area ratio of a martensite and a bainite is 0% or more and 10% or less, and the non-quenched portion has a welded portion that is welded to another member.
B62D 29/00 - Superstructures characterised by material thereof
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
When a front reference location (Pf) is an intersection point of a front imaginary line (L1) passing through a center axis (O) of a rotor core (31) and a front end of a front magnet (32f) and an outer circumferential surface of the rotor core (31) in a plane view, and a rear reference location (Pr) is an intersection point of a rear imaginary line (L2) passing through the center axis (O) of the rotor core (31) and a rear end of a rear magnet (32r) and the outer circumferential surface of the rotor core (31) in the plane view, a front end of a rear bridge (39r) is disposed at a position away from the rear reference location (Pr) to a front (F) by θf (radian) at a central angle about the center axis (O), and a rear end (39f1) of a front bridge (39f) is disposed at a position away from the front reference location (Pf) to the front (F) by 0 (radian) or more and θf (radian) or less at the central angle about the center axis O. However, θf satisfies Formulae (1) and (2) described below.
When a front reference location (Pf) is an intersection point of a front imaginary line (L1) passing through a center axis (O) of a rotor core (31) and a front end of a front magnet (32f) and an outer circumferential surface of the rotor core (31) in a plane view, and a rear reference location (Pr) is an intersection point of a rear imaginary line (L2) passing through the center axis (O) of the rotor core (31) and a rear end of a rear magnet (32r) and the outer circumferential surface of the rotor core (31) in the plane view, a front end of a rear bridge (39r) is disposed at a position away from the rear reference location (Pr) to a front (F) by θf (radian) at a central angle about the center axis (O), and a rear end (39f1) of a front bridge (39f) is disposed at a position away from the front reference location (Pf) to the front (F) by 0 (radian) or more and θf (radian) or less at the central angle about the center axis O. However, θf satisfies Formulae (1) and (2) described below.
0
<
θ
f
≤
(
θ
a
/
8
)
(
1
)
θ
a
=
2
π
/
(
Nslot
)
(
2
)
Provided is a frame member formed by hot-stamping a steel sheet. The frame member has a closed cross section portion in which a cross section perpendicular to a longitudinal direction is a closed cross section, and the closed cross section portion has at least two flat parts having a radius of curvature larger than a maximum external dimension of the cross section, and a recessed bead part formed between the two flat parts. The recessed bead part has a pair of wall portions which have a radius of curvature of 50 mm or greater, and protrude toward an inside of the closed cross section portion from end portions of the two flat parts facing each other via a pair of bent portions bent toward an inside of the closed cross section. A Vickers hardness of a thickness middle portion in the wall portion is 520 Hv or greater, a width of the wall portion is 0.5 times or greater and 2.5 times or less an effective width We, and a standard deviation ratio obtained by dividing a standard deviation of hardness frequency distribution in a surface layer portion in the wall portion by a standard deviation of hardness frequency distribution in the thickness middle portion in the wall portion is less than 1.0.
In this non-oriented electromagnetic steel sheet, the chemical composition of the base material thereof contains, in mass%, not more than 0.010% of C, more than 1.20% but not more than 4.00% of Si, more than 0.12% but not more than 2.50% of Al, 0.10-1.00% of Mn, not more than 0.20% of P, 0.0010-0.050% of S, not more than 0.0050% of O, less than 0.0040% of N, 0.0030-0.10% of Zr, less than 0.0030% of Ti, less than 0.0030% of Nb, less than 0.0030% of V, not more than 0.0050% of REM, not more than 0.0050% of Ca, not more than 0.0050% of Mg, not more than 0.50% of Cu, not more than 0.050% of Mo, not more than 0.20% of Sn, not more than 0.20% of Sb, not more than 0.050% of Ni, not more than 0.50% of Cr, and not more than 0.0030% of B, the balance being Fe and impurities, and satisfies [1.0≤Zr/S≤3.0].
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
H01F 1/147 - Alloys characterised by their composition
H01F 3/02 - Cores, yokes or armatures made from sheets
H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
42.
HOT-ROLLED STEEL SHEET AND HOT-DIP GALVANIZED STEEL SHEET
22 - is detected by the time-of-flight secondary ion mass spectrometry is 0.80-5.00 mm per 100 μm x 100 μm. The B segregation degree at the old austenite grain boundary is 80 or more.
This non-oriented electromagnetic steel sheet comprises a base material having a chemical composition, in terms of mass%, of C: 0.010% or less, Si: more than 1.20% but no more than 4.00%, Al: more than 0.10% but no more than 3.00%, Mn: 0.10%-1.00%, P: 0.20% or less, S: 0.0010% or less, O: 0.005% or less, N: 0.0040-0.015%, Zr: 0.0026-0.10%, Ti: 0.020% or less, Nb: 0.020% or less, V: 0.020% or less, REM: 0.0010% or less, Ca: 0.0050% or less, Mg: 0.0050% or less, Cu: 0.50% or less, Mo: 0.050% or less, Sn: 0.20% or less, Sb: 0.20% or less, Ni: 0.050% or less, Cr: 0.50% or less, B: 0.0030% or less, and the balance being Fe and impurities. The non-oriented electromagnetic steel satisfies [0.10 ≤ Zr/(6.5 × N) ≤ 2.0], and has a Z cross-section taken at t/4, in which the number ratio of particles having a Zr concentration of 30 at% or more among large particles having equivalent circle diameters of at least 1 μm is 30% or more.
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 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
H01F 1/147 - Alloys characterised by their composition
H01F 3/02 - Cores, yokes or armatures made from sheets
H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material
A plated steel material including a plated layer and a base steel material. In a cross section perpendicular to a surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies (L-L0)/L0 ×100≥2.0 (%), wherein L0 is a linear distance between ends of the boundary line in an observation region, and L is a length of the boundary line between the ends. The plated layer includes a first region where an Fe concentration is less than 5.0 mass %, a second region where an Fe concentration is 5.0 mass % or more and less than 30.0 mass %, and a third region where an Fe concentration is 30.0 mass % or more and 80.0 mass % or less, the first region including an Al-containing phase at an area fraction of 0% and less than 5%.
C22C 30/06 - Alloys containing less than 50% by weight of each constituent containing zinc
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 2/28 - Thermal after-treatment, e.g. treatment in oil bath
A plated steel material including a plated layer and a base steel material. In a cross section perpendicular to a surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies (L−L0)/L0×100≥2.0 (%), wherein L0 is a linear distance between ends of the boundary line in an observation region, and L is a length of the boundary line between the ends. The plated layer includes a first region where an Fe concentration is less than 5.0 mass %, a second region where an Fe concentration is 5.0 mass % or more and less than 30.0 mass %, and a third region where an Fe concentration is 30.0 mass % or more and 80.0 mass % or less, the first region including an Al-containing phase at an area fraction of 5% or more.
C22C 30/06 - Alloys containing less than 50% by weight of each constituent containing zinc
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 2/28 - Thermal after-treatment, e.g. treatment in oil bath
An Ni—Fe—Cr alloy welded joint that has excellent intergranular corrosion resistance is provided. The Ni—Fe—Cr alloy welded joint of the present disclosure includes a pair of base metals, and a weld metal formed between the pair of the base metals. The base metals each have a chemical composition consisting of, by mass %, C: 0.005 to 0.015%, Si: 0.05 to 0.50%, Mn: 0.05 to 1.50%, P: 0.030% or less, S: 0.020% or less, Cu: 1.00 to 5.00%, Ni: 30.00 to 45.00%, Cr: 18.00 to 30.00%, Mo: 2.00 to 4.50%, Ti: 0.50 to 2.00%, and N: 0.0010 to 0.0150%, with the balance being Fe and impurities. The occupancy ratio of Cr carbides in a heat affected zone of the base metals is 0.150% or less.
A press forming apparatus includes a first die set and a second die set that are in positions to face each other in a press direction and perform relative movement in the press direction. The first die set includes a first support surface and a punch portion that protrudes from the first support surface. The second die set includes a press surface disposed so as to be out of position from a position to face the punch portion in the press direction, and a wall surface that is continuous with the press surface. When viewed from the second die set side in the press direction, the punch portion includes a side surface that faces the wall surface and that includes an opening opened on the wall surface side. At a forming bottom dead center of the relative movement between the first die set and the second die set in the press direction, the wall surface faces the side surface of the punch portion.
This Fe-based amorphous alloy has an amorphous structure and contains, in terms of at%, 8.0-18.0% B, 2.0-9.0% Si, 0.10-5.00% C, 78.00-86.00% Fe, not less than 0.010 but less than 1.000% P, 0.006-0.020% S, and 0.0010-0.2000% N, with the remainder being impurities.
0000 is the linear distance between one end and the other end of the boundary line in the observation region, and L is the length of the boundary line between the one end and the other end.
0000 is the straight line distance between one end and the other end of the boundary line in the observation area, and L is the length of the boundary line between the one end and the other end.
The present invention addresses the problem of providing an Fe-Cr-Ni steel sheet having improved heat resistance. A Fe-Cr-Ni steel sheet according to the present invention has a prescribed chemical composition. The value of 0.5 × Cr + 1.4 × Ni + 3.2 × Nb + 0.1 × Mo + 3.6 × Cu − 3.4 × Si − 0.6 × Co (the element symbols in the formula represent the contained amounts (mass%) of the corresponding elements, and zero is substituted when the element is not contained) is 50 or less. The corresponding grain boundary frequency of corresponding grain boundaries having a Σ value of 3-29 is 50% or greater in total. KAM representing the proportion for which KAM values are 1-2°, and HAGB representing the ratio between crystal grain boundary lengths for which the relative orientation difference is 15° or greater and the total grain boundary length for which the relative orientation difference is 2° or greater, satisfy KAM/HAGB ≤ 0.010.
Provided is a titanium alloy sheet excellent in high temperature strength and workability at room temperature. This titanium alloy sheet has a chemical composition containing, by mass%, more than 1.40% and 2.10% or less of Cu, 0.50-1.50% of Sn, 0.10-0.60% of Si, 0.10-1.00% of Nb, and 0.08% or less of O with the balance being Ti and impurities, and the number density of the precipitated phase is 0.15/μm2 or more.
Disclosed is a new technology for suppressing deviations in the concentration distribution of a reducing gas in a furnace radial direction inside a blast furnace when supplying reducing gas to the inside of the blast furnace. One embodiment of the technology according to the present disclosure is a blast furnace having a hot-air tuyere, said blast furnace characterized in that: the hot-air tuyere has a tuyere body, a first reducing gas blow port, and a second reducing gas blow port; the tuyere body has a hot-air flow path; the first reducing gas blow port penetrates the wall of the tuyere body; and the second reducing gas blow port penetrates the wall of the tuyere body at a position different from that of the first reducing gas blow port.
Disclosed is a new technology for suppressing deviations in the concentration distribution of a reducing gas in a furnace radial direction inside a blast furnace when supplying reducing gas to the inside of the blast furnace. One embodiment of the technology according to the present disclosure is a blast furnace having a hot-air tuyere, said blast furnace characterized in that: the hot-air tuyere has a tuyere body, a reducing gas blow port, and a reducing gas blow lance; the tuyere body has a hot-air flow path; the reducing gas blow port penetrates the wall of the tuyere body; and the reducing gas blow lance has a blowout port within the hot-air flow path.
This steel sheet has a specific chemical composition, and the microstructure thereof at the position of 1/4 depth contains, in terms of an area ratio, 80% or more of martensite, a total of 0-15% of ferrite, bainite, and pearlite, and 0-10% of retained austenite. The microstructure of a surface layer part contains, in terms of an area ratio, a total of 60% or more of ferrite, bainite, and pearlite, and a total of 0-40% martensite and retained austenite. The average C content in a range between the position of 10 µm from the surface in the sheet thickness direction to the position of 20 µm from the surface in the sheet thickness direction is 0.085 mass% or less, the maximum C content in a range from the surface to the position of 30 µm in the sheet thickness direction is 0.130 mass% or less, the tensile strength is 1,470 MPa or more, and the VDA bending angle is 75° or more.
This plated steel material is provided with a plating layer disposed on a surface of a base steel material, wherein: the chemical composition of the plating layer includes more than 10.0% to 40.0% of Al, more than 4.0% to 15.0% of Mg, and 0% to 5.0% of Fe, with the balance being Zn and impurities; either or both of Co and Ni are present in a certain region from the interface between the plating layer and a chemical conversion treatment layer to the surface of the chemical conversion treatment layer; the total amount of Co and Ni in the certain region is 1.0-8.0 mg/m2per surface area of the plating layer; a Zn-containing oxide having a thickness of 0.02-0.10 μm is present in the surface of the plating layer; and the CIE 1976 lightness index L* of the plated steel material is 40-80.
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 22/05 - 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
In this grain-oriented electrical steel sheet, an insulating film does not contain a chromium compound, the film tension of the insulating film is 4.9 MPa or greater, and in a spectrum obtained by measuring the insulating film using a fluorescent X-ray analysis method, when the potassium intensity is defined as P (K) and the sodium intensity is defined as P (Na), the ratio P (K)/P (Na) between P (K) and P (Na) is greater than 13.0 and less than or equal to 100.
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
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
The present invention addresses the problem of providing an electric power generation device that has high electric power generation performance, is easily manufactured by having a simple structure, and generates electric power by vibration with high performance. An electric power generation device according to the present invention comprises a soft magnetic member, a coil, and a magnetic field generation source. The soft magnetic member has a free end that is movable in one direction, and a supported stationary portion. The coil is disposed so as to be wound around at least a portion of the soft magnetic member. The magnetic field generation source is positioned on the opposite side from the soft magnetic member with respect to a plane that is perpendicular to the longitudinal direction of the soft magnetic member and passes through the free end.
H02K 35/06 - Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving flux distributors, and both coil systems and magnets stationary
H02N 2/18 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
60.
AUSTENITIC STAINLESS ALLOY WELDED JOINT AND AUSTENITIC STAINLESS ALLOY WELDING MATERIAL
An austenitic stainless alloy welded joint which includes a weld metal excellent in weld hot cracking resistance, polythionic acid SCC resistance, naphthenic acid corrosion resistance, and age-toughness is provided. A weld metal (20) contains, in mass %, C: 0.020% or less, Si: 0.01 to 1.00%, Mn: 0.20 to 2.00%, P: 0.030% or less, S: 0.010% or less, Cr: 16.0 to 25.0%, Ni: 15.0 to 40.0%, Mo: 2.5 to 5.0%, Nb: 0.10 to 2.00%, N: 0.05 to 0.30%, sol. Al: 0.001 to 0.100%, and B: 0.0010 to 0.0050%, with F1 defined by Formula (1) being 2.30 or less, and F2 defined by Formula (2) being 2.5 or less.
An austenitic stainless alloy welded joint which includes a weld metal excellent in weld hot cracking resistance, polythionic acid SCC resistance, naphthenic acid corrosion resistance, and age-toughness is provided. A weld metal (20) contains, in mass %, C: 0.020% or less, Si: 0.01 to 1.00%, Mn: 0.20 to 2.00%, P: 0.030% or less, S: 0.010% or less, Cr: 16.0 to 25.0%, Ni: 15.0 to 40.0%, Mo: 2.5 to 5.0%, Nb: 0.10 to 2.00%, N: 0.05 to 0.30%, sol. Al: 0.001 to 0.100%, and B: 0.0010 to 0.0050%, with F1 defined by Formula (1) being 2.30 or less, and F2 defined by Formula (2) being 2.5 or less.
F
1
=
130
B
+
8
C
+
0
.
0
2
5
C
r
+
0.25
Mn
+
0.08
Mo
+
0.6
Nb
+
1
2
P
+
7
.
6
S
+
0.78
Si
+
0
.
0
12
W
(
1
)
F
2
=
[
Mo
]
H
/
[
Mo
]
L
(
2
)
A hot-dip plated steel sheet includes a hot-dip plated layer formed on a steel sheet. An absolute value of a difference in an area fraction of a first region between a pattern portion and a non-pattern portion is 30% or more. A cross section parallel to a surface is exposed at any position of 3t/4 position, t/2 position, or t/4 position from the surface of the hot-dip plated layer, virtual lattice lines are drawn on each of the cross sections, a region in which a proportion of an area fraction B of a [Zn phase] to a total area fraction A of the [Zn phase] and an [Al/MgZn2/Zn ternary eutectic structure] is 20% or more in each of a plurality of regions partitioned by the lattice lines is defined as the first region, and a region in which the proportion is less than 20% is defined as the second region.
This Fe-based amorphous alloy has an amorphous structure and contains, in terms of at%, 8.0-18.0% B, 2.0-9.0% Si, 0.05-0.60% Mn, 78.00-86.00% Fe, 0.006-0.020% S, and 0.0010-0.2000% N, with the remainder being impurities.
This Fe-based amorphous alloy has an amorphous structure and contains, in terms of at%, 8.0-18.0% B, 2.0-9.0% Si, 0.10-5.00% C, 0.05-0.60% Mn, 78.00-86.00% Fe, not less than 0.010 but less than 1.000% P, 0.001-0.020% S, and 0.0010-0.2000% N, with the remainder being impurities.
C22C 45/02 - Amorphous alloys with iron as the major constituent
H01F 1/153 - Amorphous metallic alloys, e.g. glassy metals
H01H 1/16 - Contacts characterised by the manner in which co-operating contacts engage by abutting by rollingContacts characterised by the manner in which co-operating contacts engage by abutting by wrappingRoller or ball contacts
The present invention adopts a plated steel material provided with a plating layer formed on at least part of a surface of a base steel material, wherein: at least part of a surface of the plating layer has a site where a plurality of cracks is observed; the plurality of cracks extends in substantially the same direction as one another; and in the site, when a cross-section that is perpendicular to the direction in which the plurality of cracks extends and perpendicular to a surface of the plated steel material and that has a length of 200 μm in the direction parallel to the surface is taken as an observation region, the number ratio of cracks inclined at an angle of 35° to 55° with respect to the thickness direction of the plating layer is 80% or more based on all cracks observed in the observation region, the number ratio of distances Lc satisfying formula (1) is 80% or more based on all distances Lc observed in the observation region, and the average value of widths Wc of the cracks at a thickness position T/2 away from the surface of the plating layer is 10 μm or less in the observation region, wherein a distance between adjacent cracks is denoted as Lc, and the thickness of the plating layer is denoted as T. (1): 0.3T ≤ Lc ≤ 1.6T
This plated steel material comprises a plating layer formed on at least a part of the surface of a base steel sheet. In a cross-section of the plating layer taken perpendicular to the surface of the plated steel material, if fifty second-measurement-lines are drawn in a 45° direction relative to the direction parallel to the surface of the plated steel material, the plated steel material satisfies formulae (1) and (2), and further, the number of second-measurement-lines satisfying formula (3) is 40 or more. Formula (1): 0≤ΣLs/L≤0.95; Formula (2): 0.05≤Ave(Σds/d)≤0.90; Formula (3): 0.05≤Σds/d≤0.90.
0000 is the linear distance between one end and the other end of the boundary line in the observation region, and L is the length of the boundary line between the one end and the other end.
0000 represents the linear distance between one end and the other end of the boundary line in the observation region, and L represents the length of the boundary line between the one end and the other end.
This plated steel material comprises a plating layer disposed on the surface of a base steel material, wherein: the chemical composition of the plating layer contains, by mass, over 10.0% to 40.0% of Al, over 4.0% to 15.0% of Mg, and 0 to 5.0% of Fe, the balance being Zn and impurities; either or both of Co and Ni are present in a specific region from the interface between the plating layer and a chemical conversion treatment layer to the surface of the chemical conversion treatment layer; the total amount of Co and Ni in the specific region per unit surface area of the plating layer is 1.0-8.0 mg/m2; a Zn-containing oxide having a thickness of 0.02 to 0.10 μm is present on the surface of the plating layer; and the CIE 1976 brightness index L* of the plated steel material is lower than 40.
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C22C 30/06 - Alloys containing less than 50% by weight of each constituent containing zinc
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 22/05 - 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
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
70.
STEEL SHEET, MANUFACTURING METHOD THEREFOR, AND COMPONENT
This steel sheet has a predetermined chemical composition and has, when a position corresponding to 1/4 of the sheet thickness from the surface along the sheet thickness direction is defined as a 1/4 depth position, a microstructure at the 1/4 depth position which includes, in terms of area ratio, at least 80% of martensite, a total of 0-15% of ferrite, bainite, and pearlite, and 0-10% of retained austenite, wherein when a region in the martensite in which the average interval of grain boundaries having a crystal orientation angle difference of at least 50º is at most 2 μm is defined as fine martensite, the area ratio of the fine martensite in the martensite is at least 7%, and the tensile strength is at least 1,470 MPa.
A martensitic stainless steel material that achieves both a high yield strength and excellent SSC resistance is provided. The martensitic stainless steel material according to the present disclosure consists of, in mass %, C: 0.030% or less, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.0050% or less, Cu: 0.01 to 3.50%, Cr: 10.00 to 14.00%, Ni: 4.50 to 7.50%, Mo: 1.00 to 4.00%, Ti: 0.050 to 0.300%, V: 0.01 to 1.00%, Al: 0.001 to 0.100%, Co: 0.010 to 0.500%, Ca: 0.0005 to 0.0050%, Sn: 0.0005 to 0.0500%, N: 0.0010 to 0.0500%, O: 0.050% or less, and the balance: Fe and impurities, and has a yield strength of 758 MPa or more. Within this range, the contents of elements and the yield strength satisfy Formula (1) described in the description.
A crankshaft with improved fatigue strength and reduced quench cracking is provided. The crankshaft (10) is a crankshaft including a pin (12) and pin tops (15), the pin (12) including a sliding portion (121) having a constant outer diameter, and fillets (122) formed contagiously with the sliding portion (121), each fillet (122) including a hardened region (122a) at its surface, the hardened region being a region with a hardness higher than the hardness of the core of the sliding portion (121) by 100 HV or more, the hardened region (122a) of the fillet (122) having a thickness (d1) not smaller than 12.0% of the radius (R) of the sliding portion (121), the pin tops (15) having a prior-austenite grain size not larger than 60 μm.
C21D 1/10 - Surface hardening by direct application of electrical or wave energySurface hardening by particle radiation by electric induction
C21D 9/30 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for crankshaftsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for camshafts
A duplex stainless steel material that has high strength and excellent low-temperature toughness is provided. A duplex stainless steel material according to the present disclosure consists of, by mass %, C: 0.030% or less, Si: 0.20 to 1.00%, Mn: 0.50 to 7.00%, P: 0.040% or less, S: 0.0200% or less, Al: 0.100% or less, Ni: 4.20 to 9.00%, Cr: 20.00 to 30.00%, Mo: 0.50 to 2.00%, Cu: 0.50 to 3.00%, N: 0.150 to 0.350%, and V: 0.01 to 1.50%, with the balance being Fe and impurities. The duplex stainless steel material has a yield strength of 552 MPa or more, and when an austenite grain with a minor axis of 20 μm or more is defined as primary austenite and the balance of austenite is defined as secondary austenite, the microstructure is composed of, in volume ratio, ferrite in an amount of 35 to 55%, primary austenite in an amount of 40 to 55%, and secondary austenite in an amount of 5 to 20%.
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
This hot-stamped product includes a base steel and a plated layer formed on a surface of the base steel, and the plated layer has a chemical composition containing, in mass %, Sc: 0.000010 to 3.0%, Fe: more than 15.0% and 95.0% or less, Al: 0 to 80.0%, and Si: 0 to 20.0%, and Mg, Ca, La, Ce, Y, Cr, Ti, Ni, Co, V, Nb, Cu, Mn, Sr, Sb, Pb, B, Li, Zr, Mo, W, Ag, P, Sn, Bi, and In at a total amount of 0% to 5.0%, and a remainder: 5.0% or more of Zn, and impurities, and includes an n-Zn phase near a surface of the plated layer.
The steel sheet processing apparatus includes a laser irradiation unit configured to form a groove on a surface of a steel sheet, an illumination unit configured to irradiate the groove with pulsed light, an imaging unit configured to image the groove irradiated with the pulsed light with an exposure time longer than an irradiation time of the pulsed light to generate a captured image, a determination unit configured to make a determination based on the captured image, and a processing control unit configured to control an operation of the laser irradiation unit. The determination unit determines whether the groove satisfies a first standard on the basis of the captured image. In a case where the determination unit determines that the groove does not satisfy the first standard, the processing control unit controls the laser irradiation unit so that the groove formed by the laser irradiation unit satisfies the first standard.
An austenitic stainless alloy material that has excellent creep strength and excellent stress relaxation cracking resistance is provided. An austenitic stainless alloy material according to the present disclosure contains, in mass %, C: 0.03 to 0.12%, Si: 0.05 to 2.00%, Mn: 0.05 to 3.00%, P: 0.03% or less, S: 0.010% or less, Ni: 18.0 to less than 25.0%, Cr: 22.0 to less than 30.0%, Co: 0.04 to 0.80%, Ti: 0.002 to 0.010%, Nb: 0.1 to 1.0%, V: 0.01 to 1.00%, Al: 0.001 to less than 0.030%, and N: 0.10 to 0.35%. The number density of precipitates having an equivalent circular diameter of 0.5 to 2.0 μm is 5000 pieces/mm2 or more.
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
traverse hardening device performs traverse hardening on a shaft-like body in which a large diameter portion and a small diameter portion are connected via a level difference portion. The device includes a plurality of divided coils which are annularly disposed around a central axis and through which a high-frequency current flows; and a coil drive unit that brings the divided coils close to and away from the central axis. Each of the divided coils includes a plurality of protruding coil portions each having a shape protruding in a direction away from the central axis, and the protruding coil portions are disposed so as to at least partially overlap each other in an extending direction of the central axis and to overlap each other in a radial direction around the central axis.
Provided is a wire material which can achieve excellent wire drawability even if the N content is more than 0.0060 mass% and which can achieve excellent shrinkage and excellent twisting properties in a steel wire produced using said wire material as a raw material. A wire material according to the present disclosure has a chemical composition which contains, in terms of mass%, 0.60-1.20% of C, 0.10-1.50% of Si, 0.10-1.00% of Mn, 0.002-0.050% of P, 0.002-0.050% of S, more than 0.0060% to 0.0120% of N, 0.0020-0.0120% of B and 0.0050% or less of O, with the remainder comprising Fe and impurities, and satisfies formula (1) and formula (2). Formula (1): 9100N-12200B+9.7≤40.0; Formula (2): 1.265+279N-357B-C≥0.00.
Provided is a plated steel wire in which: a steel portion has a prescribed steel composition; in a central part within 1.0 mm from a center axis in a cross-section that is parallel to a longitudinal direction and passes through the center axis, the area ratio of a mixed structure of ferrite and cementite phases is 95.0% or greater; the diameter of the steel portion is 5.0 mm or greater; the surface of the steel portion is covered, at an amount of at least 100 g/m2, by a Zn-based plating layer containing Zn as the main component; the tensile strength TS is 1900-2250 MPa; and the ratio YS/TS of the yield strength (0.2% proof stress) YS to the tensile strength TS is 0.87 or greater. Also provided is a rope obtained by bundling a plurality of the plated steel wires.
A Fe—Cr—Ni alloy material that has high strength and reduced strength anisotropy is provided. A Fe—Cr—Ni alloy material according to the present disclosure consists of, by mass %, C: 0.030% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 2.00%, P: 0.030% or less, S: 0.0050% or less, Ni: 29.0 to 36.5%, Cr: 23.0 to 27.5%, Mo: 2.00 to 6.00%, Al: 0.01 to 0.30%, rare earth metal: 0.016 to 0.100%, N: 0.220 to 0.500%, and O: 0.010% or less, with the balance being Fe and impurities, and satisfies Formula (1). In a microstructure, a standard deviation of the grain size numbers of austenite grains is 0.80 or less. The tensile yield strength is 758 MPa or more:
A Fe—Cr—Ni alloy material that has high strength and reduced strength anisotropy is provided. A Fe—Cr—Ni alloy material according to the present disclosure consists of, by mass %, C: 0.030% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 2.00%, P: 0.030% or less, S: 0.0050% or less, Ni: 29.0 to 36.5%, Cr: 23.0 to 27.5%, Mo: 2.00 to 6.00%, Al: 0.01 to 0.30%, rare earth metal: 0.016 to 0.100%, N: 0.220 to 0.500%, and O: 0.010% or less, with the balance being Fe and impurities, and satisfies Formula (1). In a microstructure, a standard deviation of the grain size numbers of austenite grains is 0.80 or less. The tensile yield strength is 758 MPa or more:
3
×
Ni
-
2
×
Cr
-
150
×
N
<
15.
(
1
)
where, a content of a corresponding element in percent by mass is substituted for each symbol of an element in Formula (1).
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
In a preparation step of the method for manufacturing a welded joint of steel plates according to the present disclosure, two steel plates are prepared, at least one of which has a carbon content of 0.30 mass% or greater. In a welding step, laser arc hybrid welding is performed on the two steel plates, and F1 defined by expression (1) is 2.10 or more. (1): F1 = \{(WL + WA)/V\}/\{t × ([C] + [Si]/24 + [Mn]/6 + [Ni]/40 + [Cr]/5 + [Mo/4 + [V]/14)\}, wherein: t is a plate thickness (mm) at a welding point; [element symbol] is the content in mass% of a corresponding element of the steel plate having a higher carbon content; WL is an output (kW) of laser welding; WA is an output (kW) of arc welding; and V is a welding speed (m/min).
B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
B23K 9/16 - Arc welding or cutting making use of shielding gas
22S environment. A steel material according to the present disclosure contains, in terms of mass%, 0.15% to less than 0.30% of C, 0.05-1.00% of Si, 0.05% to less than 0.30% of Mn, 0.020% or less of P, 0.0050% or less of S, 0.10-1.00% of Cr, 0.85-2.50% of Mo, 0.002-0.020% of Ti, 0.002-0.050% of Nb, 0.01-0.30% of V, 0.0001-0.0030% of Ca, 0.0005-0.0050% of B and 0.005-0.100% of Al, with the remainder comprising Fe and impurities, has a yield strength of 862 MPa to less than 965 MPa, and is such that the content of elements, the grain size number (GSN) of prior austenite grains and the content of P close to prior austenite grain boundaries (P_seg.) satisfy formula (1). Formula (1): (Mn+P_seg.)/(2.5Mo+GSN)≤0.125.
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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
83.
STAINLESS STEEL MATERIAL FOR SOLID OXIDE TYPE WATER ELECTROLYSIS
This stainless steel material for solid oxide type water electrolysis contains, on a mass basis, 0.030% or less of C, 0.20% or less of Si, less than 0.30% of Mn, 0.050% or less of P, 0.0030% or less of S, 19.0-24.0% of Cr, 2.5% or less of Mo, 0.01-0.15% of Al, 0.0001-0.0100% of Mg, 0.030% or less of N, 0.40% or less of Nb, 0.40% or less of Ti, 1.00% or less of Ni and 1.00% or less of Cu, with the remainder comprising Fe and impurities. In this stainless steel material for solid oxide type water electrolysis, the average particle diameter of inclusions is 0.2-3.0 μm, the abundance of inclusions is 30-150 inclusions/mm2, the aspect ratio of inclusions is more than 1.0 and less than 3.0, and the proportion among inclusions of Mg-containing inclusions in which the Mg concentration is 0.5 mass% or more is 0.30 or more.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
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
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 9/65 - Means for supplying currentElectrode connectionsElectric inter-cell connections
84.
α+β TYPE TITANIUM ALLOY, TITANIUM ALLOY ROD, COMPONENT, AND METHOD FOR PRODUCING α+β TYPE TITANIUM ALLOY
This α+β type titanium alloy comprises 4.00-5.50% of Al, 1.40-4.50% of one or both of Fe and Cr, 1.50-5.00% of Mo, 0-4.00% of V, 0.05-0.25% of O, less than 0.10% of Si, less than 0.010% of C, and Ti and impurities as the remainder, wherein: included in the structure are a granular α phase having an aspect ratio of 8 or less and a mixed structure including a needle-like α phase and a β phase; the maximum width of the needle-like α phase is 0.01-5.00 μm; and, where the element having the higher content between Fe and Cr is element M, the concentration distribution of element M in the mixed structure satisfies formula (1). Formula 1: (A - B) × C / D ≥ 0.160
A rotor core (31) comprises: a plurality of electrical steel sheets (10) that are stacked; a fixing part (11) that fixes electrical steel sheets (10) which are adjacent in the stacking direction; and a first adhesion part (12A) that has a different fixing strength than the fixing part (11) and that is provided partially to a different region from the fixing part (11) between the electrical steel sheets (10). The electrical steel sheets (10) have a first portion (13) at which a greater strength is required as compared to other portions. The first portion (13) includes a bridge part (14). The first adhesion part (12A) is provided so as to cover the first portion (13) of the electrical steel sheets (10).
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
86.
METHOD FOR PRODUCING HOLLOW BENT COMPONENT AND DEVICE FOR PRODUCING HOLLOW BENT COMPONENT
Provided is method for producing a hollow bent component comprising a step in which, simultaneously with the formation of a shear bent part, a tensile force in the direction of a velocity intersecting a straight line which is the direction of inclination of a heating means and a cooling means is applied to the shear bent part. Also provided is a device for producing a hollow bent component that is configured such that a control unit thereof controls a conveyance mechanism and/or a bending force application part such that, simultaneously with the formation of a shear bent part, a tensile force in the direction of a velocity intersecting a straight line L1 which is the direction of inclination of a heating means and a cooling means is applied to the shear bent part.
This martensitic stainless steel material has the composition comprising, in terms of mass, C: 0.305-0.600%, Si: 0.05-1.00%, Mn: 0.10-1.50%, P: 0.0085-0.0400%, S: 0.0300% or less, Cr: 13.0-18.0%, Ni: 0.01-0.30%, Mo: 0.01-1.00%, Al: 0.300% or less, N: 0.010-0.350%, Ca: 0.0001-0.0030%, and O: 0.001-0.010%, with the balance being Fe and impurities, and 2.5C+N (wherein C and N are the contents of C and N, respectively) being 0.85% or more. In a cross section of the martensitic stainless steel material, the average grain diameter of carbide is more than 0.50 μm and 2.00 μm or less, the number of carbide with the size of 10 μm or more is 0.20/cm2 or less, and the area ratio of carbide is 15.0-20.0%.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/18 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for knives, scythes, scissors, or like hand cutting tools
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
Provided is a duplex seamless stainless steel pipe having high strength, excellent crevice corrosion resistance in a supercritical corrosive environment, and excellent hot workability. A duplex seamless stainless steel pipe according to the present disclosure has a chemical composition as described in the specification, satisfies formula (1), and has a yield strength of 550 MPa or more. A duplex seamless stainless steel pipe according to the present disclosure has a microstructure composed of ferrite and austenite, wherein the ferrite volume fraction FX in a thick-walled central part of the duplex seamless stainless steel pipe is 35.0-65.0%, and the ferrite volume fraction FY in a region of 100 µm in the depth direction from the outer surface of the duplex seamless stainless steel pipe is at least 0.90 FX. (1): Cr +3.3 (Mo+0.5W)+16N-Mn≥30.0. Here, in the element symbol in formula (1), the content of the corresponding element is substituted in units of mass%. When the corresponding element is not contained, "0" is substituted for the element symbol.
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 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
A galvannealed steel sheet according to the present invention has a Zn-containing plating layer on a surface of a steel material having a specific component. The aspect ratio of crystal grains on the surface of the plating layer is 4.0 or less. In the plating layer, the thickness of the Γphase is 1.0 μm or less and the tensile strength is 1180 MPa or more.
Provided is a stainless steel material for solid oxide water electrolysis, which contains, on a mass basis, 0.030% or less of C, 1.6% to 3.5% of Si, 0.10% to 1.00% of Mn, 0.050% or less of P, 0.0030% or less of S, 16.0% to 21.0% of Cr, 1.00% or less of Al, 0.030% or less of N, 1.00% or less of Nb, 1.00% or less of Ti, 1.00% or less of Ni, and 1.00% or less of Cu, with the balance being made up of Fe and impurities.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
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
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodesAssemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 9/65 - Means for supplying currentElectrode connectionsElectric inter-cell connections
91.
LAMINATED CORE, ROTARY ELECTRIC MACHINE, PRESSURIZING JIG, AND METHOD FOR MANUFACTURING LAMINATED CORE
This laminated core (1) comprises a plurality of laminated electromagnetic steel sheets (10), and an adhesion part (41) that is provided between the electromagnetic steel sheets (10) adjacent to each other in the lamination direction and bonds the electromagnetic steel sheets (10) to each other. The adhesion part (41) has a first adhesion section (41A) provided in a first region (11) of the electromagnetic steel sheet (10), and a second adhesion section (41B) provided in a second region (12) different from the first region (11). The compression stress remaining in the first region (11) provided with the first adhesion section (41A) is greater than the compression stress remaining in the second region (12) provided with the second adhesion section (41B).
An aluminum-plated steel sheet for hot stamping, including: a base steel sheet; an aluminum-plated layer provided on at least one surface of the base steel sheet; and a surface treatment film provided on the aluminum-plated layer, in which the surface treatment film contains needle-like compounds X, the needle-like compounds X contain 70% or more in number % of needle-like compounds X1 in which proportion of a major axis to a minor axis of the compound X1 is 4 or more and 50 or less and the compounds X1 have a hexagonal crystal structure, and the compounds X1 contain 70% or more in number % of a needle-like compounds X2 having a smaller angle of 0 degrees or more and 40 degrees or less among angles at an intersection point of a straight line parallel to the major axis and a straight line parallel to an aluminum-plated layer surface.
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
A traverse hardening device performs traverse hardening on a shaft-like body in which a large diameter portion having a relatively large outer diameter and a small diameter portion having a relatively small outer diameter are connected via a level difference portion. The device includes: first divided coils annularly arranged around a motion center line at a first position on the motion center line; second divided coils annularly arranged around the motion center line at a second position different from the first position on the motion center line; a first divided coil drive unit configured to bring the first divided coils close to and away from the motion center line; a second divided coil drive unit configured to bring the second divided coils close to and away from the motion center line; and a control unit for the first divided coil drive unit and the second divided coil drive unit.
An axle box suspension (40) is provided with a coil spring (41), a first cylindrical body (42), a second cylindrical body (43), a plurality of permanent magnets (44), and a conductive film (45). The coil spring (41) is disposed on an axle box (30) and supports a side beam (11) of a truck frame (10). The first cylindrical body (42) is disposed coaxially with the coil spring (41) on the outside of the coil spring (41). The second cylindrical body (43) is disposed coaxially with the coil spring (41) on the outside of the coil spring (41) and on the inside or outside of the first cylindrical body (42). The plurality of permanent magnets (44) are held on the peripheral surface of the first cylindrical body (42). The conductive film (45) is provided to the peripheral surface of the second cylindrical body (43) so as to face the permanent magnets (44).
B61F 5/30 - Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
F16F 15/03 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using electromagnetic means
F16F 15/06 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with metal springs
According to the present invention, coal for producing coke or mixed coal for producing coke that includes coal and waste plastic for mixing is charged into a carbonization chamber (2) of a coke oven (1) and dry distilled to produce coke (13). When the dry distillation is complete, a portion or all of a plurality of charging ports (4 (4a–4d)) that are provided in the carbonization chamber of the coke oven are used to charge waste plastic (14 (14b–14d)) into an upper space (5) that is above the coke inside the carbonization chamber in order from the charging port closest to an ascension pipe (3) to the charging port farthest from the ascension pipe. The present invention thereby provides a waste plastic processing method that makes it possible to keep pyrolysis gas from waste plastic from leaking or erupting from charging ports.
C10B 53/07 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of synthetic polymeric materials, e.g. tyres
C08J 11/12 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by dry-heat treatment only
The present invention discloses a technology with which, if a reduction gas flow path is provided inside a wall of a blast furnace tuyere, it is possible to increase the flow rate of cooling water in a cooling water flow path provided inside the wall of the tuyere. A blast furnace according to the present disclosure has a tuyere. The tuyere has: a tuyere body; a reduction gas flow path; and a cooling water flow path. The tuyere body has a protruding part that protrudes into the inside of the blast furnace. The reduction gas flow path penetrates a wall of the tuyere body. The cooling water flow path is provided inside the wall of the tuyere body. In at least the protruding part, the cooling water flow path has at least one rib that reduces the cross-sectional area of the cooling water flow path.
A method for producing reduced iron briquettes according to one embodiment of the present invention is characterized by comprising a reduced iron production step for producing a solid reduced iron, and a briquette step for briquetting the reduced iron in a non-oxidizing and a non-nitrogenous seal gas atmosphere.
This method for producing reduced iron comprises: a raw material charging step for charging a raw material into a shaft furnace; a reduction step for causing the raw material to react with a reducing gas in the shaft furnace to obtain reduced iron and exhaust gas after reduction; and an exhaust gas circulation step for circulating the exhaust gas after reduction so as to be used as part of the reducing gas. The raw material charging step includes, in order, a depressurization step, a first purge step, a raw material charging step, a second purge step, a pressure equalization step, and a raw material discharge step. The exhaust gas circulation step includes a dehydration step for removing water from the exhaust gas after reduction. The gas for purging is an inert gas. A pressure equalization gas is obtained by removing water from the exhaust gas in the dehydration step.
