A coated and plated steel sheet or coated and plated steel strip including: a steel sheet or a steel strip; a plating layer provided on one surface or both surfaces of the steel sheet or steel strip and containing zinc; a chemical conversion coating provided on the plating layer provided on one surface of the steel sheet or steel strip or provided on at least one of the plating layers provided on both surfaces of the steel sheet or steel strip; and a single-layer or multilayer coating film provided on the chemical conversion coating, in which the single-layer coating film in contact with the chemical conversion coating or the coating film, of the multilayer coating film, which is in contact with the chemical conversion coating, contains a cerium compound capable of being dissolved in an amount of 0.10 g or more with respect to 100 g of water at room temperature at a concentration of from 0.01 to 10.0% by mass, with respect to a solid content of the single-layer coating film in contact with the chemical conversion coating or the coating film, of the multilayer coating film, which is in contact with the chemical conversion coating.
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
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C23C 2/06 - Zinc or cadmium or alloys based thereon
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
A hot-stamp formed body has a predetermined chemical composition and has a microstructure including, by area ratio, martensite: 90% to 100% and a remainder in the microstructure: 0% to 10%. The percentage of martensite having a GAIQ value of 40000 or less in all of the martensite is less than 5.0%, an average grain size of prior austenite grains is 6.0 μm or less, and a standard deviation of grain sizes of the prior austenite grains is 2.6 μm or less.
There is provided a blank in which two or more starting materials that overlap each other are joined with each other by laser welding, including the blank has a single layer region, in which only one of the starting materials is present, and a multi-layer region, in which two or more of the starting materials overlap each other, laser welding is continuously applied to the multi-layer region and the single layer region, and one end of a laser weld zone is located at an end portion of the single layer region of the blank, and the one end forms a concave-shaped welding end portion having a concave shape when the blank is viewed from an end face.
An automobile panel 1 has a sheet-shaped outer panel 2 and a sheet-shaped inner panel 3, and an interior member 30 arranged in a space S between the inner panel 3 and the outer panel 2. The interior member 30 is an elongated member that extends in a first direction D1 along the outer panel 2, and includes a first end 41 that is one end in the first direction D1, and a second end 42 that is another end. The first end 41 has a first connecting portion 45 which is connected to the inner panel 3. The interior member 30 has a second connecting portion 46 that is connected to the outer panel 2, at a position that is separated from the first end 41 along the first direction D1.
An objective of the present invention is to provide a steel sheet having a high strength which can provide excellent appearance quality. The steel sheet has a chemical composition including, in mass %, C: more than 0.030% to 0.145%, Si: 0% to 0.500%, Mn: 0.50% to 2.50%, P: 0% to 0.100%, S: 0% to 0.020%, Al: 0% to 1.000% or less, N: 0% to 0.0100%, and the like, wherein a metal micro-structures consisting of 70 to 95% of ferrite in volume fraction and 5 to 30% of hard phases in volume fraction, and a value X1 obtained by dividing a standard deviation of average Mn concentrations in a rolling direction at ¼ sheet-thickness positions in a sheet thickness direction by an average Mn concentration at the ¼ sheet-thickness positions is 0.025 or less.
A resistance spot welded joint according to an aspect of the present invention includes: a plurality of overlapping steel sheets; and a weld having a nugget by which the steel sheets are joined, and having a corona bond and a heat-affected zone formed around the nugget, in which one or more of the plurality of steel sheets are high strength steel sheets having a tensile strength of 780 MPa or more, one or more of the plurality of steel sheets are plated steel sheets having a zinc-based plating, the high strength steel sheet and the zinc-based plating are adjacent to each other on a contact surface, a diameter of the heat-affected zone is 1.5 times or more a diameter of the nugget, in the heat-affected zone, carbides having a circle equivalent diameter of 0.1 or more are distributed at a number density of 40/100 μm2 or more, and in the corona bond, an amount of an η phase of the zinc-based plating is 20 area % or less.
A suspension arm includes a main body. The main body includes a curved portion curved along a longitudinal direction and has a closed section. The main body includes an inner side wall, an outer side wall, a first side wall, and a second side wall. The inner side wall corresponds to an inner side of a curve of the curved portion. The outer side wall corresponds to an outer side of the curve of the curved portion. A thickness of the inner side wall is larger than a thickness of the outer side wall. In sectional view of the main body perpendicular to the longitudinal direction, each of a length of the first side wall and a length of the second side wall is longer than each of a length of the inner side wall and a length of the outer side wall.
This hot-stamping formed body includes, as a chemical composition, by mass %: C: 0.15% or more and 0.50% or less; Si: 0.10% or more and 3.00% or less; Mn: 0.10% or more and 3.00% or less; P: less than 0.10%; S: less than 0.10%; N: less than 0.10%; Ti: 0.020% or more and 0.150% or less; B: 0.002% or more and 0.010% or less; optionally Al, Cr, Mo, Co, Ni, Cu, V, W, Ca, Mg, and REM; and a remainder including Fe and impurities, in which a microstructure of the hot-stamping formed body includes, by volume fraction, 85% or more of martensite and less than 15% of retained austenite, and in the microstructure, a standard deviation of a frequency distribution of nanohardnesses is 0.70 GPa or less, and an average grain size is 4.0 μm or less.
There is provided a cooling structure between battery cells which allows a temperature rise of adjacent battery cells to be restrained more efficiently even for an appearance of an abnormally heat-generating battery cell. A cooling structure between battery cells disposed side by side so that two side surfaces face each other, the cooling structure between the battery cells includes, formed of plate-shaped metal members each having a thermal conductivity of 100 W/m·K or more and a thickness of 0.3 mm or more, and being in contact with the respective facing side surfaces of the adjacent battery cells, and a heat insulating layer disposed between the plate-shaped metal members, and having a thermal conductivity of 1.0 W/m·K or less and a thickness of 0.5 mm or more, a multi-layer structure of cell/metal member/heat insulating layer/metal member/cell, and the cooling structure further includes a cooling member present in the vicinity of the plurality of battery cells, wherein one end portion of each of the plate-shaped metal members is in contact with the cooling member.
H01M 10/653 - Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
H01M 10/658 - Means for temperature control structurally associated with the cells by thermal insulation or shielding
H01M 50/209 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
H01M 50/249 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/258 - Modular batteries; Casings provided with means for assembling
10.
STEEL SHEET, STEEL MEMBER, AND COATED STEEL MEMBER
This steel sheet includes: a base steel sheet having a predetermined chemical composition; and a scale formed on a surface of the base steel sheet, in which the base steel sheet has a decarburized layer formed on a side of an interface with the scale, the decarburized layer has an internal oxidized layer formed on the side of the interface with the scale, a depth of the decarburized layer from an interface between the base steel sheet and the scale is 90 μm or more, a depth of the internal oxidized layer from the interface is less than 30 μm, and the scale contains 80% or more of Fe by mass %.
High strength steel sheet and plated steel sheet having high plateability, LME resistance, and hydrogen embrittlement resistance, that is, steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50%, having an internal oxidation layer including fine granular oxides and coarse granular oxides in a surface layer of the steel sheet, a number density of fine granular oxides in the internal oxidation layer being 4.0/μm2 or more, a number density of coarse granular oxides in the internal oxidation layer being 4.0/25 μm2 or more and 30.0/25 μm2 or less, and including a surface depleted layer with a steel composition not including oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% at a depth of ½ of the average depth of the internal oxidation layer calculated from the cross-sectional SEM image of the steel sheet, and a plated steel sheet using the same.
High strength steel sheet and plated steel sheet having high plateability, LME resistance, and hydrogen embrittlement resistance, that is, steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50%, having an internal oxidation layer including fine granular oxides in a surface layer of the steel sheet, a number density of fine granular oxides in the internal oxidation layer being 4.0/μm2 or more, and including a surface depleted layer with a steel composition not including oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% at a depth of ½ of the average depth of the internal oxidation layer calculated from the cross-sectional SEM image of the steel sheet, and a plated steel sheet using the same.
This battery unit is a battery unit including a battery pack that houses a battery cell, and a water-cooling medium flow path formed outside a bottom surface of the battery pack, in which the water-cooling medium flow path is made of a Zn-based plated steel sheet, an inorganic film or a resin film is formed as a chemical conversion coating film on a surface of the Zn-based plated steel sheet, and the inorganic film contains a Si-based component or a Zr-based component as a main component.
H01M 50/24 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
H01M 50/231 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks having a layered structure
Provided is a burring processing method, which is a method for forming a buffing processed portion including a raised portion and a curved portion in a metal component having a pilot hole formed therein, the method being characterized by including: a preforming step of enlarging a diameter of the pilot hole, moving an edge portion of the pilot hole relative to the metal component in a first direction of a thickness direction of the metal component in a first range around the pilot hole of the metal component, and forming the whole first range into a preformed portion raised from the metal component in the first direction; and a main forming step of deforming the preformed portion in a second direction opposite to the first direction, forming a second range on an outer diameter side of the preformed portion to have the same height as the first range in the first direction, and forming part of a third range on an inner diameter side of the preformed portion from the second range to be part of the curved portion and the raised portion.
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in at least one bent portion, the crystal grain size Dpx (mm) of the grain-oriented electrical steel sheet is FL/4 or more. Here, FL the an average length (mm) of the planar portions.
The present disclosure inhibits liquid metal embrittlement (LME) cracking and improves corrosion resistance in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, and a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond toward an outside of the spot welded part. A higher tensile strength of a tensile strength of the first steel sheet and a tensile strength of the second steel sheet is 780 MPa or more, an area ratio of a MgZn2 phase at the cross-section of the boundary plating layer is 10% or more, and the first plating layer and the second plating layer satisfy a predetermined Relation I.
The hot-dip plated steel material includes a steel material and a hot-dip plated layer disposed on a surface of the steel material, the hot-dip plated layer has a certain chemical composition, and the hot-dip plated layer has a diffraction intensity obtained from a result of X-ray diffraction measurement, the diffraction intensity satisfying a certain relationship.
A battery case includes: a battery tray; a plurality of cross frame parts; and an impact absorbing member, wherein the impact absorbing member includes a corrugated portion, wherein the corrugated portion has a plurality of bottom surfaces and a plurality of convex portions; the bottom surfaces of the corrugated portion are each between the convex portions; the convex portion has a top surface, two side surfaces, and two ridge lines; the two side surfaces of the convex portion face each other; the two ridge lines of the convex portion are ridge lines connecting the top surface of the convex portion and the two side surfaces of the convex portion; and the two ridge lines of the convex portion extend in a direction from a second side portion toward a first side portion of the battery tray.
H01M 50/242 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
H01M 50/244 - Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
H01M 50/249 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/291 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
19.
STEEL PIPE FOR PRESSURE PIPING AND STARTING MATERIAL FOR STEEL PIPE
A steel pipe for pressure piping subjected to autofrettage has an average hardness at its outer layer region of 1.20 times or more of an average hardness at its inner layer region. When an outer diameter is D, and an inner diameter is d, a measured value of a residual stress at an outer surface is denoted by σo1, a measured value of a residual stress at an outer surface after halving is denoted by σo2, and a measured value of a residual stress at an inner surface after the halving is denoted by σi2, an estimated value σi1 of a residual stress at the inner surface of the steel pipe is determined by [σi1=(−σi2)/(A×(t/T)2−1)], [t/T=((σo2−σo1)/(A×(σo2−σo1)−C×σi2))1/2], [A=3.9829× exp(0.1071×(D/d)2)], and [C=−3.3966×exp(0.0452×(D/d)2)] is −150 MPa or less.
C21D 9/14 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
C21D 7/12 - Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
A hot rolled steel sheet is for a non oriented electrical steel sheet, wherein vickers hardness at the widthwise edge is 180 Hv or more, a value obtained by subtracting a vickers hardness at the widthwise center from the vickers hardness at the widthwise edge is 10 to 100 Hv, ductile brittle transition temperature at the widthwise edge is 0° C. or less, a value obtained by subtracting the ductile brittle transition temperature at the widthwise edge from a ductile brittle transition temperature at the widthwise center is 10 to 100° C., and a value obtained by subtracting a sheet thickness at the widthwise edge from a sheet thickness at the widthwise center is 50 μm or less.
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 articles; Furnaces therefor for sheet metals
There is provided a non-oriented electrical steel sheet having a predetermined chemical composition, in which an area fraction of a crystal structure A composed of crystal grains having a grain size of 100 μm or more is 1% to 30% in a cross section parallel to a rolled plane of the non-oriented electrical steel sheet, an average grain size of a crystal structure B which is a crystal structure other than the crystal structure A is 40 μm or less, and a Vickers hardness HvA of the crystal structure A and a Vickers hardness HvB of the crystal structure B satisfy Equation 1 ((HvA2+HvB2)/2−(HvA+HvB)2/4≤7.0).
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 articles; Furnaces therefor for sheet metals
A crankshaft with improved fatigue strength and machinability is provided. The crankshaft includes a pin and journal, having a chemical composition of, in mass %: 0.40 to 0.60% C; 0.01 to 1.50% Si; 0.4 to 2.0% Mn; 0.01 to 0.50% Cr; 0.20 to 0.50% Al; 0.001 to 0.02% N; up to 0.03% P; 0.005 to 0.20% S; 0.005 to 0.060% Nb; 0 to 0.060% Ti; and balance Fe and impurities, wherein, for each of the pin and journal, the hardness measured at a position at a depth of ¼ of the diameter from the surface is higher than HV 245, the microstructure at that position is mainly composed of ferrite/pearlite, and the fraction of ferrite is not lower than 16%.
A plated steel sheet for hot stamping according to one aspect of the present invention includes a steel sheet, a plating layer formed on either surface or both surfaces of the steel sheet and having an Al content of 60 mass % or more, and a surface film layer formed on the plating layer. A thickness t of the plating layer is 10 to 60 μm. An average crystal grain diameter of the plating layer in a thickness range from an interface between the plating layer and the surface film layer to a position at ⅔ of the thickness t is 2t/3 or less and 15.0 μm or less. A surface film layer contains particles containing one or more elements selected from A group elements consisting of Sc, V, Mn, Fe, Co, Ce, Nb, Mo, and W. A total content of the A group elements is 0.01 to 10.0 g/m2. An average grain diameter of the particles containing the A group elements is 0.05 to 3.0 μm.
The present disclosure inhibits liquid metal embrittlement (LME) cracking and improves corrosion resistance in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond of the spot welded part toward an outside of the spot welded part, and a Zn penetrated part is present at least at one of the first steel sheet and the second steel sheet adjoining the boundary plating layer. The Zn penetrated part advances from the boundary plating layer along the steel grain boundary, an Mg concentration at a front end of the Zn penetrated part at a location where a Zn concentration is 0.1 mass % is 0.20 mass % or less, and the first plating layer and the second plating layer satisfy a predetermined Relation I.
A steel sheet has a predetermined chemical composition, when a sheet thickness is denoted by t, a metallographic structure at a t/4-position, which is a position t/4 away from a surface, in a cross section in a sheet thickness direction includes, by volume percentage, martensite: 70% or greater and residual austenite: 10% or greater, the maximum grain diameter of the residual austenite is less than 5.0 μm when a Mn concentration is measured at a plurality of measurement points at intervals of 1 μm in a square region with a side length of t/4 centered at the t/4-position in the cross section in the sheet thickness direction, a proportion of measurement points at which the Mn concentration is 1.1 times or greater than the average of the Mn concentrations at all of the plurality of measurement points is less than 10.0%, and the tensile strength is 1,470 MPa or greater.
This non-oriented electrical steel sheet includes a base material having a chemical composition including Si: 3.7 to 4.8%, wherein a recrystallization rate is less than 100% in terms of an area fraction, the following Formula (i) and Formula (ii) are satisfied, and the tensile strength is more than 700 MPa.
This non-oriented electrical steel sheet includes a base material having a chemical composition including Si: 3.7 to 4.8%, wherein a recrystallization rate is less than 100% in terms of an area fraction, the following Formula (i) and Formula (ii) are satisfied, and the tensile strength is more than 700 MPa.
4.3≤Si+sol. Al+0.5×Mn≤4.9 (i)
This non-oriented electrical steel sheet includes a base material having a chemical composition including Si: 3.7 to 4.8%, wherein a recrystallization rate is less than 100% in terms of an area fraction, the following Formula (i) and Formula (ii) are satisfied, and the tensile strength is more than 700 MPa.
4.3≤Si+sol. Al+0.5×Mn≤4.9 (i)
(B50(0°)+2×B50(45°)+B50(90°))/4≥1.57 (ii)
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
The hot-dip plated steel material includes a steel material and a hot-dip plated layer disposed on a surface of the steel material, the hot-dip plated layer has a certain chemical composition, and the hot-dip plated layer has a diffraction intensity obtained from a result of X-ray diffraction measurement, the diffraction intensity satisfying a certain relationship.
Provided is a welding monitoring apparatus that monitors a welding state of a V-convergence region in which a strip-shaped metal sheet is converged in a V-shape, when the metal sheet is cylindrically formed while being conveyed, and both side edges of the metal sheet are heated and melted in a manner of being butted each other while being converged in the V-shape, such that an electric resistance welded steel pipe is manufactured. This welding monitoring apparatus includes an image capturing unit that captures images of a region including the V-convergence region in time series; and an image processing unit that extracts a welding point based on the images captured in time series and detects the presence or absence and a position of irregular arcing at the welding point or on an upstream side of the welding point.
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
B21C 37/08 - Making tubes with welded or soldered seams
B23K 11/06 - Resistance welding; Severing by resistance heating using roller electrodes
B23K 11/087 - Seam welding not restricted to one of the preceding subgroups for rectilinear seams
B23K 13/08 - Electric supply or control circuits therefor
B23K 31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
G01N 21/952 - Inspecting the exterior surface of cylindrical bodies or wires
A valve spring includes a nitrided layer, and a core portion that is further inward than the nitrided layer. A chemical composition of the core portion consists of, in mass %, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, S: 0.020% or less, Cr: 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Ca: 0.0001 to 0.0050%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, and N: 0.0070% or less, with the balance being Fe and impurities. In the core portion, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 per μm2, and in the core portion, a numerical proportion of Ca sulfides with respect to a total number of oxide-based inclusions and sulfide-based inclusions is 0.20% or less.
F16F 1/02 - Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
C21D 1/18 - Hardening; Quenching with or without subsequent tempering
A hot-stamped product with improved delayed-fracture resistance is provided. The hot-stamped product 1 includes: a steel substrate 10; and an Al film 20 formed on the steel substrate 10, the Al film 20 including: an interface layer 21 located at the interface with the steel substrate 10 and with part of the αFe substituted by Al and Si; an intermediate layer 22 formed on the interface layer 21; and an oxide layer formed on the intermediate layer, the intermediate layer 22 including an Fe—Al—Si phase 22a with part of the αFe substituted by Al and Si, the Fe—Al—Si phase 22a including one or more elements selected from the group consisting of Zr, Ce, Y, Ta, Ni, Cu, Nb, Cr, Co, V and Ti, the oxide layer 23 including one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, Sc and Zn.
There is provided a steel sheet having a chemical composition comprising, in mass %, C: 0.05 to 0.25%, Si: 0.2 to 2.0%, Mn: 1.2 to 3.0%, P: 0.030% or less, S: 0.050% or less, Al: 0.01 to 0.55%, N: 0.0100% or less, and Ti: 0.010 to 0.250%, with the balance: Fe and impurities, wherein a random intensity ratio of a texture in a near-surface portion of the steel sheet is 8.0 or less, and a minimum angle formed between a maximum strength orientation in a {110} pole figure of the texture and a normal direction of a rolled surface of the steel sheet is 10° or less.
Provided is a frame member obtained by joining a first steel sheet member and a second steel sheet member at a spot-welding portion by spot welding. A cross-sectional region in which a cross section perpendicular to a longitudinal direction of the frame member is a closed cross section is formed, the first steel sheet member has a tensile strength of 1,900 MPa or more, and the spot-welding portion has a molten metal portion formed by the spot welding and a heat-affected portion adjacent to an outside of the molten metal portion. Average Vickers hardness HvAve at a measurement position corresponding to the first region on the virtual straight line and minimum Vickers hardness HvMin at a measurement position corresponding to the third region on the virtual straight line satisfy HvAve−HvMin≤100.
A structural member includes a first member, a second member, and a restricting portion. The first member includes a top plate, vertical walls, flanges, and ridge portions. The second member includes a top plate, vertical walls, flanges, and ridge portions. The vertical walls of the second member are disposed along the vertical walls of the first member inside of the vertical walls. The flanges of the second member are joined to the flanges of the first member, respectively. The restricting portion is provided between the vertical walls of the second member. The restricting portion restricts deformation in which portions of the vertical walls of the first member close to the flanges approach each other.
B60R 19/04 - Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section
B60R 19/02 - Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
B60R 19/18 - Means within the bumper to absorb impact
A structural member includes a first member, a second member, and resin. The first member includes a top plate, vertical walls, flanges, and ridge portions. The second member includes a top plate, vertical walls, flanges, and ridge portions. The vertical walls of the second member are disposed along the vertical walls of the first member on an inner side of the vertical walls. The flanges of the second member are joined to the flanges of the first member, respectively. The resin is filled in between the vertical walls of the second member.
B60R 19/18 - Means within the bumper to absorb impact
B60R 19/03 - Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
The present disclosure inhibits liquid metal embrittlement (LME) cracking in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, and a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond toward an outside of the spot welded part. A higher tensile strength of a tensile strength of the first steel sheet and a tensile strength of the second steel sheet is 780 MPa or more, an area ratio of a η-Zn phase at the cross-section of the boundary plating layer is 5% or more, and the first plating layer and the second plating layer satisfy predetermined Relations I and II.
A non-oriented electrical steel sheet of the present invention has a chemical composition capable of causing α-γ transformation, in which, in a case where an area ratio of grains having a crystal orientation of an {hkl}orientation (within a tolerance of 10°) when measured by EBSD is denoted as Ahkl-uvw, A411−011 is 15.0% or more, and the non-oriented electrical steel sheet has an average grain size of 10.0 μm to 40.0 μm.
A non-oriented electrical steel sheet of the present invention has a chemical composition capable of causing α-γ transformation, and contains 0.0005% to 0.0050% of Ti, in which, in a case where an area ratio of grains having a crystal orientation of an {hkl} orientation (within a tolerance of 10°) when measured by EBSD is denoted as Ahkl-uvw, A411-011 is 15.0% or more, and the non-oriented electrical steel sheet has an average grain size of 10.0 μm to 40.0 μm.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less and one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total with a remainder including Fe and impurities, in which a recrystallization rate is 1% to 99% in a metallographic structure, a sheet thickness is 0.50 mm or less, and, in the case of measuring a magnetic flux density B50 after annealing the non-oriented electrical steel sheet at 800° C. for two hours, a magnetic flux density B50 in a 45° direction with respect to a rolling direction is 1.75 T or more.
C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet 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
A method for manufacturing a two-piece can includes punching a metal plate into a disk shape, the metal plate including a Sn-plated layer of 100 mg/m2 or more and 1500 mg/m2 or less provided on a base material made of steel, a Cr-plated layer of 6 mg/m2 or more and 100 mg/m2 or less provided on the Sn-plated layer, and a coating layer laminated on the Cr-plated layer; and shaping by performing drawing and ironing on the metal plate having the disk shape into a can body having a bottomed cylindrical shape, wherein in the shaping, the drawing and ironing is performed so that ((Tb−Tw)/Tb)×100, which is a plate thickness reduction rate from the metal plate having the disk shape to the can body, is set as 35%≤((Tb−Tw)/Tb)×100(%)≤60%.
This surface-treated steel sheet includes: a steel sheet; a Zn-based plating layer formed on the steel sheet; and a coating formed on the Zn-based plating layer, in which a Si concentration, a P concentration, a F concentration, a V concentration, a Zr concentration, a Zn concentration, and an Al concentration of the coating are, by mass %, Si: 10.00% to 25.00%, P: 0.01% to 5.00%, F: 0.01% to 2.00%, V: 0.01% to 4.00%, Zr: 0.01% to 3.00%, Zn: 0% to 3.00%, and Al: 0% to 3.00%, in a narrow spectrum of 5i2p obtained by performing XP S analysis on a surface of the coating, a ratio of an integrated intensity of a peak having a local, maximum value, at 103.37±0.25 eV to an integrated intensity of a peak having a local maximum value at 102.26±0.25 eV is 0.04 or more and 0.25 or less.
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 2/06 - Zinc or cadmium or alloys based thereon
A crankshaft with improved fatigue strength is provided. A crankshaft 10 includes journals 11, pins 12, and fillets 14, each fillet 14 having a residual stress distribution where the residual stresses are compressive residual stresses from the surface down to a depth of at least 300 μm, the maximum value of the compressive residual stress being not lower than 1000 MPa, the surface roughness Rz being lower than 3.00 μm.
A plated steel material having a plating layer having an average chemical composition containing, in mass %, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (ΣA) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (ΣB) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0≤SMg/Si<20.0 (Formula 1), 3.0≤Si/ΣB<24.0 (Formula 2), and 26.0≤(Si/ΣB)×(Mg/Si)<375.0 (Formula 3) are satisfied, and in an X-ray diffraction pattern of the surface of the plating layer, a diffraction intensity ratio R1 defined by R1={I(16.18°)+I(32.69°)}/I(27.0°) (Formula 4) satisfies 2.5
This non-oriented electrical steel sheet includes a base steel sheet (10); and an insulation coating (20) formed on a surface of the base steel sheet (10), in which the insulation coating (20) contains a metal phosphate and an organic resin, an arithmetic mean of a center line average roughness Ra75 of the insulation coating (20) in a rolling direction of the base steel sheet (10) and a center line average roughness Ra75 of the insulation coating (20) in a direction perpendicular to the rolling direction is 0.20 to 0.50 μm, and the amount of nitrogen in the insulation coating (20) is 0.05 to 5.00 mass %.
C23C 22/03 - 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 non-aqueous solutions containing phosphorus compounds
44.
CRANKSHAFT SHAPE INSPECTION METHOD, ARITHMETIC UNIT, PROGRAM, AND SHAPE INSPECTION APPARATUS
A crankshaft shape inspection method includes: acquiring three-dimensional point cloud data of a surface of a crankshaft S; superposing the three-dimensional point cloud data on a surface shape model of the crankshaft S; moving the three-dimensional point cloud data superposed on the surface shape model to match with a coordinate system used when the crankshaft S is machined; generating an estimated machined surface, which is the surface after machining of a predetermined machining portion of the crankshaft S, in the coordinate system used when the crankshaft S is machined; and calculating a distance between machining portion point cloud data extracted from the three-dimensional point cloud data moved and the estimated machined surface generated and determining a machining stock of the crankshaft S to be insufficient based on the calculated distance.
To provide a steel sheet for hot stamping suitable for manufacturing, through hot-stamping working, a component having portions with different strengths, and a hot-stamped member having portions with different strengths. A steel sheet for hot stamping according to the present invention includes, on a surface of the steel sheet: a site having a surface-treated film whose emissivity at a wavelength of 8.0 μm at 25° C. is 60% or more; and a site at which the surface-treated film is not provided, in which the surface-treated film contains carbon black, and one or more of oxides selected from a group consisting of a Zr oxide, a Zn oxide, and a Ti oxide, in which the carbon black and the oxides exist while being dispersed over the entire surface-treated film, the surface-treated film has a silica content of 0 to 0.3 g/m2, and when an adhesion amount of the carbon black and an adhesion amount of the oxides are set to XCB (g/m2) and XOxide (g/m2), respectively, an equation (1) below is satisfied.
C23C 28/04 - 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 inorganic non-metallic material
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
This surface-treated steel includes surface-treated steel comprising:
a steel sheet;
a plated layer including zinc formed on the steel sheet; and
a film formed on the plated layer,
wherein the film has a thickness of 100 nm or more and 1000 nm or less,
wherein the film includes:
an amorphous phase A containing Si, C, O, P, Zn, and V, and one or two or more kinds selected from the group consisting of Ti, Zr, and Al as constituent elements, wherein Zn/Si, which is a peak intensity ratio between Zn and Si, is 1.0 or more, and V/P, which is a mass ratio between V and P, is 0.050 to 1.000 when analysis is performed by EDS; and
an amorphous phase B containing Si, O, and Zn, wherein the amorphous phase B has a Zn/Si ratio of less than 1.0, the Zn/Si ratio is a peak intensity ratio between Zn and Si when analysis is performed by EDS,
a Zn content of the amorphous phase A is 10 mass % or less, and
in a cross section in a thickness direction, a percentage of a length of an interface between the plated layer and the amorphous phase B to a length of an interface between the plated layer and the film is 30% or more.
This non-oriented electrical steel sheet has a predetermined chemical composition, and in which the tensile strength is 580 MPa or more, the average grain size of a recrystallization part of base iron is 50 μm or less, and in inclusions having an equivalent circle diameter of 1 μm or more and an S content of 5 mass % or more contained in base iron, the number of inclusions having a Mg content of more than 5 mass % and a Mn content of 5 mass % or more is 5 times or more the number of inclusions having a Mg content of 5 mass % or less and a Mn content of 5 mass % or more.
An electrical steel sheet used for a laminated core is an electrical steel sheet including an insulation coating 3 on a surface of a base steel sheet 2, the insulation coating being coated with a coating composition for an electrical steel sheet. The coating composition for an electrical steel sheet includes: an epoxy resin; an epoxy resin curing agent; and an elastomer-modified phenolic resin, in which the amount of the elastomer-modified phenolic resin is 10 parts by mass to 100 parts by mass with respect to 100 parts by mass of the epoxy resin.
C09D 163/10 - Epoxy resins modified by unsaturated compounds
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B32B 33/00 - Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
49.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
This non-oriented electrical steel sheet includes: a base steel sheet; and an insulation coating formed on a surface of the base steel sheet, in which the insulation coating contains a metal phosphate and an organic resin, a moisture content of the insulation coating is 0.003 to 0.03 wt %, and a contact angle of water on the insulation coating is 55° to 85°.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
A non-oriented electrical steel sheet according to the present invention has a chemical composition in which α-γ transformation can occur and which contains at least, in terms of mass %, at most 0.010% of C, 1.50% to 4.00% of Si, 0.0001% to 1.0% of sol. Al, at most 0.010% of S, at most 0.010% of N, and a total of 2.50% to 5.00% of at least one selected from the group consisting of Mn, Ni, and Cu, with the balance including Fe and impurities, wherein when an average grain size of {411} crystal grains is defined as d411 and an average grain size of {111} crystal grains is defined as d111, d411/d111≥1.10.
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
51.
NON-ORIENTED ELECTRICAL STEEL SHEET, PRODUCTION METHOD FOR NON-ORIENTED ELECTRICAL STEEL SHEET, ELECTRIC MOTOR AND PRODUCTION METHOD FOR ELECTRIC MOTOR
This non-oriented electrical steel sheet contains a base material having a chemical composition including, in mass %, Si: 3.2 to 4.5%, wherein the tensile strength is 550 MPa or more, and a ratio (P120B/Fe700B)B between a peak-to-peak height Fe700B of Fe at 700 eV and a peak-to-peak height P120B of P at 120 eV when crystal grain boundaries are measured through Auger electron spectroscopy is not more than twice a ratio (P120i/Fe700i)i between a peak-to-peak height Fe700i of Fe at 700 eV and a peak-to-peak height P120i of P at 120 eV when the inside of crystals is measured through Auger electron spectroscopy.
H02K 1/02 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the magnetic material
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
52.
SHEARING METHOD, SHEARING DEVICE, AND SHEARING FACILITY
A shearing method of a plate-shaped workpiece for applying a shear force in a thickness direction of the plate-shaped workpiece includes: a step for starting applying the shear force on the workpiece with a clearance between action points in a surface direction orthogonal to the thickness direction of the workpiece; a step for applying the shear force after the start of applying the shear force until a fractured surface is created in the workpiece; and a step for increasing the clearance depending on a deformation of the workpiece in the thickness direction after starting applying the shear force until the fractured surface is created in the workpiece.
B23D 15/04 - Shearing machines or shearing devices cutting by blades which move parallel to each other having only one moving blade
B23D 35/00 - Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
B26D 1/01 - Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
B26D 7/06 - Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
B26D 7/26 - Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
An automobile underbody structure includes: a plurality of first frame parts; a second frame part; and an impact absorbing member, wherein: the second frame part has a first wall portion and a second wall; the impact absorbing member includes a first beam portion, a second beam portion, and a corrugated plate portion; the corrugated plate portion includes a first diagonal portion, a second diagonal portion, a first top portion, and a second top portion; and the corrugated plate portion is provided in at least respective regions, in the second frame part, to which the two adjacent first frame parts are connected.
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
B60R 19/18 - Means within the bumper to absorb impact
The steel material of the present disclosure includes a chemical composition consisting of, in mass %, C: 0.035% or less, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.0050% or less, sol. Al: 0.005 to 0.100%, N: 0.001 to 0.020%, Ni: 5.00 to 7.50%, Cr: 10.00 to 14.00%, Cu: 0.01 to less than 1.50%, Mo: 1.50 to 3.50%, V: 0.01 to 1.00%, Ti: 0.02 to 0.30%, Co: 0.01 to 0.50%, Ca: 0.0003 to 0.0030%, 0: 0.0050% or less, W: 0 to 1.50%, Nb: 0 to 0.50%, B: 0 to 0.0050%, Mg: 0 to 0.0050%, and rare earth metals (REM): 0 to 0.020%, with the balance being Fe and impurities, in which a total number density of Mn sulfide having an equivalent circular diameter of 1.0 μm or more and Ca sulfide having an equivalent circular diameter of 2.0 μm or more is 0.50/mm2 or less.
A thin steel sheet having a chemical composition satisfying 0.0001≤[Sn]+0.3[Cu]+0.1[Cr]≤0.2000 ([Sn], [Cu], and [Cr] respectively being the contents (mass %) of Sn, Cu, and Cr), having an oxide film of a thickness of 50 nm or less on the surface, and satisfying A/C<0.30 and B/C<3.0 when measuring the oxide film by the FT-IR reflectance method (A is an area of a peak derived from SiO2, B is an area of a peak derived from MnSiO3, and C is an area of a peak derived from Mn2 SiO4).
This titanium alloy sheet contains predetermined chemical components, an area ratio of an α-phase is 80% or more, an area ratio of the α-phase having an equivalent circle diameter of 1 μm or more is more than 53%, and in a (0001) pole figure in a sheet thickness direction, an angle formed between the sheet thickness direction and a direction indicating a peak of intensity calculated by texture analysis in a case in which a series rank is 16 and the Gaussian half width is 5° for an inverse pole figure using a spherical harmonics method of an electron backscatter diffraction method is 65° or less, and the average sheet thickness is 2.5 mm or less.
A steel sheet for hot stamping includes, as a chemical composition, by mass %: C: 0.060% to 0.120%; Si: 0% to 0.70%; Mn: 1.60% to 3.00%; P: 0.100% or less; S: 0.0100% or less; N: 0.0100% or less; Al: 0.001% to 0.100%; Ti: 0.005% to 0.050%; and B: 0.0005% to 0.0100%. If necessary, the chemical composition contains one or two or more selected from the group consisting of Nb, V, W, Ni, Cu, Mo, Sn, Ca, Mg, and REM and a remainder of Fe and impurities, A microstructure includes 70% or more of upper bainite by area ratio, and a number density of iron carbides having a major axis of 0.01 μm or more included in the upper bainite is equal to or greater than 4/μm2.
This steel sheet has a predetermined chemical composition, and includes, as a metallographic structure, ferrite, bainite, and pearlite in a total volume percentage of 0% or more and 50% or less, residual austenite in a volume percentage of 3% or more and 20% or less, and a remainder of fresh martensite and tempered martensite, in which residual austenite having an aspect ratio of 3.0 or more occupies 80% or more of a total residual austenite by area ratio, the steel sheet includes an internal oxide layer having a thickness of 4.0 μm or more from a surface of the steel sheet and a decarburized layer having a thickness of 10 μm or more and 100 μm or less from the surface of the steel sheet, and an amount of diffusible hydrogen included in the steel sheet is 1.00 ppm or less on a mass basis.
A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X1 value defined by X1=(2×B50L+B50C)/(3×IS) is less than 0.845, an E1 value defined by E1=EL/EC is 0.930 or more, and an iron loss W10/1k is 80 W/kg or less.
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
A titanium alloy thin sheet contains specific chemical components, in which, when a crystal orientation of an α-phase is expressed by an Euler angle g={φ1, Φ, φ2} according to Bunge's notation method, the orientation with maximum intensity expressed by a crystal orientation distribution function f(g) calculated with Series Rank of 16 and a Gaussian half width of 5° in texture analysis using a spherical harmonics method of an electron backscatter diffraction method is in the range of φ1: 0 to 30°, ϕ: 60 to 90°, and φ2: 0 to 60°, and a degree of accumulation of the orientation with maximum intensity is 10.0 or more, a 0.2% proof stress in a sheet width direction at 25° C. is 800 MPa or more, a Young's modulus in the sheet width direction is 125 GPa or more, and an average sheet thickness is 2.5 mm or less.
This hot-dip Zn-based plated steel sheet includes a steel sheet and a plating layer formed on at least part of a surface of the steel sheet, in which the plating layer has a chemical composition that includes, by mass %, Al: 6.00% to 35.00%, Mg: 2.00% to 12.00%, Ca: 0.005% to 2.00%, Si: 0% to 2.00%, Fe: 0% to 2.00%, Sb: 0% to 0.50%, Sr: 0% to 0.50%, Pb: 0% to 0.50%, Sn: 0% to 1.00%, Cu: 0% to 1.00%, Ti: 0% to 1.00%, Ni: 0% to 1.00%, Mn: 0% to 1.00%, Cr: 0% to 1.00%, and a remainder: Zn and impurities, the plating layer has an area ratio of a MgZn2 phase in a range of 15% to 60% in a cross section in a thickness direction, and the MgZn2 phase includes a Ca-based intermetallic compound having a circle equivalent diameter of 0.10 μm or smaller.
C23C 2/06 - Zinc or cadmium or alloys based thereon
C22C 18/04 - Alloys based on zinc with aluminium as the next major constituent
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
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
C22F 1/02 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
This hot stamped member includes: a steel; and a plating layer formed on the steel, in which the plating layer has a predetermined chemical composition, the plating layer contains a Zn-based oxide including one or two of a Zn oxide and a Zn—Mg oxide having a size of 1.0 μm or more and 10.0 μm or less in a thickness direction of the plating layer and 0.1 μm or more in a direction perpendicular to the thickness direction, and in a cross section of the plating layer in the thickness direction, when a length of an interface between the plating layer and the steel is indicated as Le, a sum of lengths of the Zn-based oxide projected onto the interface from an upper surface of the plating layer is indicated as ΣLi, and a sum of lengths of portions of the Zn-based oxide in contact with the plating layer projected onto the interface from the upper surface of the plating layer is indicated as ΣLai, ΣLi/Le≥0.10 and ΣLai/ΣLi≥0.50 are satisfied.
B21D 22/02 - Stamping using rigid devices or tools
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
This hot-rolled steel sheet has a desired chemical composition, a microstructure contains, in area %, ferrite: 10 to 30%, bainite: 40 to 85%, retained austenite: 5 to 30%, fresh martensite: 5% or less, and pearlite: 5% or less, the ferrite has an average particle size of 5.00 μm or less, a difference between an average nanoindentation hardness of the ferrite and an average nanoindentation hardness of the bainite is 1,000 MPa or less, and the tensile strength is 980 MPa or more.
This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2.
This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2.
0.8×TAve≤TMin
This steel sheet has a predetermined chemical composition, has a microstructure in which a number density of alloy carbides present at grain boundaries and having a major axis of 10 to 100 nm is 1.0×108 to 1.0×1011/cm2 and a number density of alloy carbides present in grains and having a major axis of 10 nm or less is 1.0×1016 to 1.0×1019/cm3, and has a tensile strength of 1,030 MPa or more.
The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes a plurality of high Co concentration regions in each of which the ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8.
This steel sheet for gas soft nitriding has a predetermined chemical composition and metallographic structure, in which, when a sheet thickness is indicated as t, a sheet width, which is a width in a direction perpendicular to a rolling direction, is indicated as w, and effective grain sizes are measured at seven positions of w/8, w/4, 3w/8, w/2, 5w/8, 3w/4, and 7w/8 in a width direction from an end portion in the width direction at a t/4 depth position from a surface, an average effective grain size, which is an average of the effective grain sizes at the seven positions, is 8.0 to 35.0 μm, and an effective grain size difference, which is a difference between a maximum value and a minimum value among the effective grain sizes at the seven positions, is 10.0 μm or less.
An Al plated electric resistance welded steel pipe for hardening use suppressing the formation of scale to the inside of the plating layer while performing hot forming and an Al plated hollow member using that Al plated electric resistance welded steel pipe, wherein the Al plated electric resistance welded steel pipe for hardening use is comprised of a base material made of a tubular steel plate and having a predetermined chemical composition and an electric resistance welded zone provided at a seam portion of the steel plate and extending in a longitudinal direction of the steel plate, the base material is further provided with an intermetallic compound layer positioned on the surface of the steel plate and including an Al—Fe—Si-based intermetallic compound and an Al plating layer positioned on the surface of the intermetallic compound layer and containing Al and Si, and 70×X/D≤Y/t≤30 is satisfied, wherein X (μm) is a thickness of the intermetallic compound layer, Y (μm) is a thickness of the Al plating layer, t (mm) is a pipe thickness of the steel pipe, and D (mm) is an outside diameter of the steel pipe.
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
B23K 11/00 - Resistance welding; Severing by resistance heating
B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X value defined by X=(2×B50L+B50C)/(3×IS) is 0.800 or more, and an iron loss W10/1k is 80 W/kg or less.
This steel sheet has predetermined chemical composition and microstructure, in a crystal orientation distribution function of a texture at a sheet thickness ¼ position, when A/B that is a ratio of a maximum value A of pole densities at Φ=20° to 60° and φ1=30° to 90° in a cross section of φ2=45° to a maximum value B of pole densities at Φ=120° to 60° and φ1=30° to 90° in the cross section of φ2=45° is 1.50 or less, a total of the maximum value A and the maximum value B is 6.00 or less, and a tensile strength is 1030 MPa or more.
A press apparatus 1 includes: a first die part 2 having a first working surface 2a; a second die part 3 having a second working surface 3a; a first support member 4 that supports the first die part 2; and a second support member 5 that supports the second die part 3. At least one of the first and second die parts 2 and 3 provides a clearance S1, S2 present in at least a portion of an overlap region R1, the overlap region being overlapped by the first and second working surfaces 2a and 3a as viewed in the press direction, the dimension of the clearance in the press direction in a no-load condition being non-uniform along two orthogonal directions as viewed in the press direction. The minimum dimension of the clearance Si within an inner region R1u in the no-load condition is smaller than the minimum dimension of the clearance S1 within an outer region R1s in the no-load condition, the inner region defined by, and located inward of, the middle line between the centroid G and edge of the overlap region R1.
This plated steel includes: a steel; and a plating layer formed on the steel, in which the plating layer contains, as a chemical composition, by mass %, Zn: 1.0% to 30.0%, Mg: 0% to 10.0%, Si: 0.05% to 10.0%, Fe: 0 to 10.0%, 0% to 5.00% in total of one or two or more selected from Ca: 0% to 3.00%, Sb: 0% to 0.50%, Pb: 0% to 0.50%, Sr: 0% to 0.50%, Sn: 0% to 1.00%, Cu: 0% to 1.00%, Ti: 0% to 1.00%, Ni: 0% to 1.00%, Mn: 0% to 1.00%, Cr: 0% to 1.00%, La: 0% to 1.00%, Ce: 0% to 1.00%, Zr: 0% to 1.00%, and Hf: 0% to 1.00%, and a remainder of Al and impurities, a microstructure of the plating layer contains an α phase which is a solid solution of Al and Zn, and the α phase contains a Zn phase having a grain size of 10 to 200 nm in a number density of 10/100 μm2 or more.
A surface-treated steel sheet includes a steel sheet, and an Ni—Co—Fe alloy layer containing Ni, Co, and Fe on the steel sheet surface. In the thickness direction of the Ni—Co—Fe alloy layer, a Co concentration in the Ni—Co—Fe alloy layer is highest at a position which is on an outermost surface side of the Ni—Co—Fe alloy layer relative to a position where the Ni concentration is highest in the Ni—Co—Fe alloy layer, and which is between the outermost surface of the Ni—Co—Fe alloy layer and a depth of 100 nm from the outermost surface. In the Ni—Co—Fe alloy layer, an Ni-concentrated region in which the Ni concentration increases toward the outermost surface of the Ni—Co—Fe alloy layer is formed between the outermost surface of the Ni—Co—Fe alloy layer and the position where the Co concentration is highest.
This steel has a steel sheet substrate and a protective film formed on at least a part of a surface of the steel sheet substrate, the chemical composition of the steel sheet substrate is, by mass %, C: 0.25% to 0.65%, Si: 0.05% to 2.00%, Mn: 0.30% to 3.00%, P: 0.050% or less, S: 0.0100% or less. N: 0.010% or less, O: 0.010% or less, Cr: 0.05% to 1.00%, and Cu: 0.10% to 1.00%, in an X-ray analysis in which measurement is carried out using a CuKα radiation, in a case where a peak intensity at a diffraction angle (2θ) position of 36.6±0.5° is regarded as 100%, the protective film has a peak having a peak intensity of more than 250% at a diffraction angle (2θ) position of 35.5±0.5° and a tensile strength is more than 1,500 MPa.
A surface-treated steel sheet of the present disclosure includes a steel sheet, and an alloy layer containing Ni and Co on a surface of the steel sheet. A surface roughness Ra1 of the surface of the alloy layer over a sampling length of 5.0 mm in the width direction of the steel sheet is 2.0 μm or less. Ra2 that denotes the arithmetic mean height of a roughness curve of the surface of the alloy layer over a sampling length of 10 μm in the width direction of the steel sheet is 20 nm or less, and RSm that denotes the mean length of roughness curve elements over the sampling length of 10 μm in the width direction of the steel sheet is 700 nm or more, Ra2 and RSm being measured using an atomic force microscope.
A load-bearing panel and a building frame structure is provided, in which an initial stiffness and a yield strength are enhanced while appropriately reducing the maximum strength after yielding. Thus, it is possible to avoid generating excessive stress in adjacent building frames. The load-bearing panel includes: a rectangular-shaped base frame 2 formed by joining a pair of horizontal base materials 21 and 22 to a pair of vertical base materials 23 and 23; and a composite surface material 3 made of wooden plywood 31 and a metal plate 32 stacked on each other. Four side edges of the composite surface material 3 are attached to a base frame 2 by driving nails. The spacing between the nails in a center part of each side edge in the length direction is smaller than the spacing between the nails in both end parts of the side edge.
As a burring processed member able to suppress the formation of fatigue cracks in a burring part, one having a structure satisfying the following relations (1) to (3) is disclosed: 3≤Ra≤100 . . . (1), 3.0
This wound core is a wound core including: a substantially rectangular wound core main body in a side view in which first planar portions and corner portions are alternately continuous and at least one of two or more bent portions existing in at least one corner portion satisfies Equations (1) to (3) below.
This wound core is a wound core including: a substantially rectangular wound core main body in a side view in which first planar portions and corner portions are alternately continuous and at least one of two or more bent portions existing in at least one corner portion satisfies Equations (1) to (3) below.
Tave≤40 nm (1)
This wound core is a wound core including: a substantially rectangular wound core main body in a side view in which first planar portions and corner portions are alternately continuous and at least one of two or more bent portions existing in at least one corner portion satisfies Equations (1) to (3) below.
Tave≤40 nm (1)
(To−Tu)/Tave≤0.50 (2)
This wound core is a wound core including: a substantially rectangular wound core main body in a side view in which first planar portions and corner portions are alternately continuous and at least one of two or more bent portions existing in at least one corner portion satisfies Equations (1) to (3) below.
Tave≤40 nm (1)
(To−Tu)/Tave≤0.50 (2)
Tave(To−Tu)≤240 nm2 (3)
A wound core (10) is a wound core including a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average length of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is RSm(b), and an average length of the roughness curve element in the width direction forming a surface of the planar portion 4 of the grain-oriented electrical steel sheet (1) is RSm(s), the relationship of 1.00
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 1/147 - Alloys characterised by their composition
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
Provided are a steel sheet having a predetermined chemical composition, and a steel microstructure comprising, by vol %, ferrite: 1 to 50%, ratio of nonrecrystallized ferrite in the ferrite: 0 to 50%, tempered martensite: 1% or more, retained austenite: 5% or more, fresh martensite: 0 to 10%, total of pearlite and cementite: 0 to 5%, and balance: bainite, and, when analyzing the surface by an EPMA, an area ratio of regions with an AlS/SiS ratio of 0.2 or less is 50% or less, and a tensile strength is 980 MPa or more, and a method for producing the same.
This internal oxide layer thickness estimation device estimates a thickness of an internal oxide layer formed in a hot-rolled steel sheet. The internal oxide layer thickness estimation device includes: a first temperature definition unit that defines a temperature of a portion to be estimated, in which the thickness of the internal oxide layer is to be estimated, in the hot-rolled steel sheet; a second temperature definition unit that defines an internal oxidation starting temperature at which internal oxidation of the hot-rolled steel sheet starts; a cumulative temperature calculation unit that calculates a cumulative temperature on the basis of the temperatures defined by the first temperature definition unit and the second temperature definition unit and a predetermined period of time from an estimation start time at which estimation of the thickness of the internal oxide layer is started to an estimation evaluation time; a first correlation expression derivation unit that derives a first correlation expression indicating a correlation between the cumulative temperature calculated by the cumulative temperature calculation unit and an estimated value of the thickness of the internal oxide layer; and an internal oxide layer thickness estimation unit that estimates the thickness of the internal oxide layer on the basis of the first correlation expression.
G01B 21/08 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
82.
ROLLING CONTROL DEVICE, ROLLING CONTROL METHOD, AND PROGRAM
A rolling control device (10) updates a preset load value Pset based on operation actual results at timings ta to tb. The rolling control device (10) derives a plasticity coefficient Qchk based on operation actual results at timings tb to tc. When the determining that it is necessary to re-update the updated preset load value Pset based on the plasticity coefficient Qchk, the rolling control device (10) updates the preset load value Pset again based on the operation actual results at the timings tb to tc.
A surface-treated metal sheet includes a steel sheet, a coating layer containing zinc formed on the steel sheet and a conversion coating formed on the coating layer, wherein the conversion coating contains an organosilicon compound, a phosphate compound and a fluorine compound, and when the surface roughness in a rectangular area with a side of 1 μm on the surface of the conversion coating is represented by an arithmetic mean height of the scale limited surface Sa, a maximum height of the scale limited surface Sz, and a root mean square height of the scale limited surface Sq, one or more conditions of an arithmetic mean height of the scale limited surface Sa being 0.1 to 10 nm, a maximum height of the scale limited surface Sz being 1 to 1,000 nm, and a root mean square height of the scale limited surface Sq being 0.1 to 100 nm are satisfied.
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 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
84.
SELF-LOCKING THREADED CONNECTION PARTIALLY IN NON-LOCKING ENGAGEMENT
A flush self-locking threaded connection partially in a non-locking engagement comprises a first and a second tubular component provided respectively with male and female threaded zone at their respective ends. First portions of the male and female threaded zones with varying thread width and root cooperate along a self-locking tightening arrangement. A locking region within the threaded connection is located in the middle of non-locking regions, and radially centered to the pipe body API tolerances in order to withstand high torque and seal performances.
High strength steel sheet and plated steel sheet having high plateability, LME resistance, and hydrogen embrittlement resistance, that is, steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50%, having an internal oxidation layer including fine granular oxides, coarse granular oxides, and grain boundary oxides in a surface layer of the steel sheet, a number density of fine granular oxides in the internal oxidation layer being 4.0/μm2 or more, a number density of coarse granular oxides in the internal oxidation layer being 4.0/25 μm2 or more, having a Ratio A of the length of the grain boundary oxides projected on the surface of the steel sheet to the length of the surface of the steel sheet when examining a cross-section of the surface layer of the steel sheet being 50% or more and 100% or less, and including a surface depleted layer with a steel composition not including oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% at a depth of ½ of the average depth of the internal oxidation layer calculated from the cross-sectional SEM image of the steel sheet, and a plated steel sheet using the same.
A non-oriented electrical steel sheet is provided which has a chemical composition including, in mass %, C: 0.0010 to 0.0050%, Si: 1.50% or less, Mn: 0.10 to 1.50%, sol. Al: 0.010 to 0.040%, Ti: 0.0030% or less, Nb: 0.0030% or less, V: 0.0030% or less, Zr: 0.0030% or less, N: 0.0030% or less, S: 0.0040% or less, B: 0.0045% or less, and the balance: Fe and impurities, and which satisfies [0.0020≤Ti+Nb+V+Zr≤0.0120], [0.5≤B/N≤1.5], [sol. B≤0.0005], and [NAlN≤0.0005].
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
87.
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET
There is provided a non-oriented electrical steel sheet in which, in a cross section of a base material in a sheet thickness direction, the number density N2-5 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range of 2.0 to 5.0 μm from the surface of the base material in the sheet thickness direction is 0.30 pieces/μm2 or less, and the relationship between the number density N2-5 and the number density N0-2 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range from the surface of the base material to 2.0 μm satisfies Formula (1):
There is provided a non-oriented electrical steel sheet in which, in a cross section of a base material in a sheet thickness direction, the number density N2-5 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range of 2.0 to 5.0 μm from the surface of the base material in the sheet thickness direction is 0.30 pieces/μm2 or less, and the relationship between the number density N2-5 and the number density N0-2 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range from the surface of the base material to 2.0 μm satisfies Formula (1):
(N2-5)/(N0-2)≤0.5 Formula (1).
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
A non-oriented electrical steel sheet according to an embodiment of the present invention is a non-oriented electrical steel sheet including a base metal steel sheet and a composite coating film that is formed on surfaces of the base metal steel sheet and includes Zn-containing phosphate and an organic resin, wherein the non-oriented electrical steel sheet contains crystalline aluminum phosphate showing diffraction lines belonging to ICDD No. 01-074-3256 when the composite coating film is measured by a wide-angle X-ray diffraction method.
H01F 1/147 - Alloys characterised by their composition
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
C23C 22/03 - 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 non-aqueous solutions containing phosphorus compounds
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
B21C 1/00 - Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
B21C 37/04 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of rods or wire
C21D 1/18 - Hardening; Quenching with or without subsequent tempering
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
F16F 1/02 - Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
Provided is a wound core including: a substantially rectangular wound core main body in a side view, in which the wound core main body includes a portion in which grain-oriented electrical steel sheets in which planar portions and corner portions are alternately continuous in a longitudinal direction and an angle formed by two planar portions adjacent to each other with each of the corner portions therebetween is 90° are stacked in a sheet thickness direction and has a substantially rectangular laminated structure in a side view, each of the corner portions has two or more bent portions having a curved shape in a side view of the grain-oriented electrical steel sheets 1, the sum of bent angles of the bent portions present in one corner portion is 90°, each bent portion in a side view has an inner side radius of curvature r of 1 mm to 5 mm, and interlaminar friction coefficients which are dynamic friction coefficients of the laminated grain-oriented electrical steel sheets in at least some of the planar portions are 0.20 or more.
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is φ, a total number of measured data items of φ is Nx, the number of data items that satisfy φ≥1.0° is Nt, the number of data items that satisfy φ of 1.0° or more and less than 2.5° is Na, the number of data items that satisfy φ of 2.5° or more and less than 4.0° is Nb, and the number of data items that satisfy φ of 4.0° or more is Nc, the following formulae (1) to (4) are satisfied:
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is φ, a total number of measured data items of φ is Nx, the number of data items that satisfy φ≥1.0° is Nt, the number of data items that satisfy φ of 1.0° or more and less than 2.5° is Na, the number of data items that satisfy φ of 2.5° or more and less than 4.0° is Nb, and the number of data items that satisfy φ of 4.0° or more is Nc, the following formulae (1) to (4) are satisfied:
0.10≤Nt/Nx≤0.80 (1)
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is φ, a total number of measured data items of φ is Nx, the number of data items that satisfy φ≥1.0° is Nt, the number of data items that satisfy φ of 1.0° or more and less than 2.5° is Na, the number of data items that satisfy φ of 2.5° or more and less than 4.0° is Nb, and the number of data items that satisfy φ of 4.0° or more is Nc, the following formulae (1) to (4) are satisfied:
0.10≤Nt/Nx≤0.80 (1)
0.37≤Nb/Nt≤0.80 (2)
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is φ, a total number of measured data items of φ is Nx, the number of data items that satisfy φ≥1.0° is Nt, the number of data items that satisfy φ of 1.0° or more and less than 2.5° is Na, the number of data items that satisfy φ of 2.5° or more and less than 4.0° is Nb, and the number of data items that satisfy φ of 4.0° or more is Nc, the following formulae (1) to (4) are satisfied:
0.10≤Nt/Nx≤0.80 (1)
0.37≤Nb/Nt≤0.80 (2)
1.07≤Nb/Na≤4.00 (3)
This wound core is a wound core including a wound core main body obtained by stacking a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in a planar portion in the vicinity of at least one bent portion, when the three-dimensional crystal orientation difference between two adjacent points in a series of points arranged at equal intervals in the extension direction of the bent portion is φ, a total number of measured data items of φ is Nx, the number of data items that satisfy φ≥1.0° is Nt, the number of data items that satisfy φ of 1.0° or more and less than 2.5° is Na, the number of data items that satisfy φ of 2.5° or more and less than 4.0° is Nb, and the number of data items that satisfy φ of 4.0° or more is Nc, the following formulae (1) to (4) are satisfied:
0.10≤Nt/Nx≤0.80 (1)
0.37≤Nb/Nt≤0.80 (2)
1.07≤Nb/Na≤4.00 (3)
Nb/Nc≥1.10 (4)
A wound core (10) in which, in a laminating direction, when the surface roughness of a steel sheet portion in a direction connecting a center in a sheet thickness direction of a grain-oriented electrical steel sheet (1) positioned on the innermost periphery of the wound core among the laminated grain-oriented electrical steel sheets (1) and a center in the sheet thickness direction of the grain-oriented electrical steel sheet (1) positioned on the outermost periphery of the wound core (10) is Ral, and the surface roughness of the grain-oriented electrical steel sheet (1) in a direction parallel to a longitudinal direction on an end surface of a planar portion (4) of the laminated grain-oriented electrical steel sheet (1) is Rac, a ratio Ral/Rac between Rat and Rac satisfies the relationship of 1.5≤Ral/Rac≤12.0.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 3/04 - Cores, yokes or armatures made from strips or ribbons
This wound core is a wound core including a wound core main body obtained by laminating a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in at least one bent portion, the crystal grain size Dpx of the grain-oriented electrical steel sheet is 2 W or less.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet 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
A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3):
A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3):
ΔCr=([Cr*]max−[Cr*]min)/[Cr*]ave (1)
A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3):
ΔCr=([Cr*]max−[Cr*]min)/[Cr*]ave (1)
ΔMo=([Mo*]max−[Mo*]min)/[Mo*]ave (2)
A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3):
ΔCr=([Cr*]max−[Cr*]min)/[Cr*]ave (1)
ΔMo=([Mo*]max−[Mo*]min)/[Mo*]ave (2)
ΔCr+ΔMo≤0.59 (3).
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
A manufacturing method of a press-formed article (200) including: press-forming a metal sheet into a preformed article (100) including a preformed bottom sheet portion (110), a first preformed standing wall portion (120a), a second preformed standing wall portion (120b), a preformed ridge portion (130) provided between the first preformed standing wall portion (120a) and the second preformed standing wall portion (120b), and a swollen portion (140) provided between the preformed bottom sheet portion (110) and the first and second preformed standing wall portions (120a) and (120b); and press-forming the preformed article (100) into a press-formed article (200) including a bottom sheet portion (210), a first standing wall portion (220a) adjacent to the bottom sheet portion (210), a second standing wall portion (220b) adjacent to the bottom sheet portion (210), and a ridge portion (230) provided between the first standing wall portion (220a) and the second standing wall portion (220b).
A plated steel sheet for automobile structural members has a steel sheet, a plating layer formed on at least a part of a surface of the steel sheet, and an oxide layer formed on at least a part of a surface of the plating layer, the plating layer has a predetermined chemical composition, and when measurement by XPS is performed at a position 5.0 nm below a surface of the oxide layer in a thickness direction. IMg/IMgOx, which is the ratio of a maximum detected intensity of Mg to a maximum detected intensity of an oxide or hydroxide of Mg, is 0.00 or greater and 1.20 or less.
A long structural member that, in a transverse section of one part or all of the long structural member in a longitudinal direction, includes the following configuration. A top plate part, a first flange part, and a second flange part are flat. A first side plate part, a first upper corner part, and a first lower corner part constitute a first thick-wall part. A thickness of the first thick-wall part is greater than a thickness of the top plate part and is greater than a thickness of the first flange part. A second side plate part, a second upper corner part, and a second lower corner part constitute a second thick-wall part. A thickness of the second thick-wall part is greater than the thickness of the top plate part and is greater than a thickness of the second flange part.
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
0.02≤T/(2Rd+T)≤0.15 (1)
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
0.02≤T/(2Rd+T)≤0.15 (1)
0.5 ≤Rd ≤3.0 (2)
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
0.02≤T/(2Rd+T)≤0.15 (1)
0.5 ≤Rd ≤3.0 (2)
0.15 ≤T ≤0.30 (3)
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
0.02≤T/(2Rd+T)≤0.15 (1)
0.5 ≤Rd ≤3.0 (2)
0.15 ≤T ≤0.30 (3)
2.5≤Rp/Rd≤10 (4)
In this method of producing a wound core, at least one bent portion (5) of one or more laminated grain oriented electrical steel sheets (1) is formed such that one side (1b) of the steel sheet (1) is placed and constrained on a die (30) and a punch (40) is press formed against a portion (1a) of the steel sheet (1) to be bent on the other free end side in the thickness (T) direction of the steel sheet. Outer surfaces of the die and the punch each have an arc portion (30a, 40a) having a predetermined curvature, and when the thickness of the steel sheet (1) is T, bent angles of the bent portions (5) are θ(°), a radius of curvature of the arc portion (30a) of the die is Rd, and a radius of curvature of the arc portion (40a) of the punch is Rp, relationships of Equations (1) to (5) below are satisfied.
0.02≤T/(2Rd+T)≤0.15 (1)
0.5 ≤Rd ≤3.0 (2)
0.15 ≤T ≤0.30 (3)
2.5≤Rp/Rd≤10 (4)
10°≤θ≤90° (5)
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
H01F 1/16 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection 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
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
This wound core is a wound core including a substantially rectangular wound core main body in a side view, wherein, in the wound core main body, first planar portions and corner portions are alternately continuous in a longitudinal direction, each corner portion has a curved shape in a side view of the grain-oriented electrical steel sheet, two or more bent portions having a second planar portion between the adjacent bent portions are provided, and in at least one of the first planar portion and second planar portion in the vicinity of the bent portion, the following Formula (1) is satisfied:
This wound core is a wound core including a substantially rectangular wound core main body in a side view, wherein, in the wound core main body, first planar portions and corner portions are alternately continuous in a longitudinal direction, each corner portion has a curved shape in a side view of the grain-oriented electrical steel sheet, two or more bent portions having a second planar portion between the adjacent bent portions are provided, and in at least one of the first planar portion and second planar portion in the vicinity of the bent portion, the following Formula (1) is satisfied:
(Nac+Nal)/Nt≥0.010 (1)
here, Nt is a total number of grain boundary determination locations in the first planar portion and second planar portion region adjacent to the bent portion, and Nac and Nal each are a number of determination location at which subgrain boundaries are able to be identified in a direction parallel to and direction perpendicular to the bent portion boundary.
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 1/16 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
A martensitic stainless steel material contains, in mass %, C: 0.030% or less, Ni: 5.00 to 7.00%, Cr: 10.00 to 14.00%, and Cu: more than 1.00 to 3.50%. On two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, respectively, a degree of Cr segregation ΔCr defined by Formula (1) described in the description, a degree of Mo segregation ΔMo defined by Formula (2) described in the description, and a degree of Cu segregation ΔCu defined by Formula (3) described in the description satisfy Formula (4):
A martensitic stainless steel material contains, in mass %, C: 0.030% or less, Ni: 5.00 to 7.00%, Cr: 10.00 to 14.00%, and Cu: more than 1.00 to 3.50%. On two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, respectively, a degree of Cr segregation ΔCr defined by Formula (1) described in the description, a degree of Mo segregation ΔMo defined by Formula (2) described in the description, and a degree of Cu segregation ΔCu defined by Formula (3) described in the description satisfy Formula (4):
ΔCr+ΔMo+ΔCu≤A (4)
where, when the yield strength is 758 to less than 862 MPa, A in Formula (4) is 0.70, and when the yield strength is 862 MPa or more, A in Formula (4) is 0.50.
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
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