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.
Provided is a hot-rolled steel sheet: that has a desired chemical composition; in which a metal structure thereof at a 1/4 position in the sheet thickness direction from a surface consists of, in terms of area%, less than 3.0% of residual austenite, not less than 15.0% but less than 60.0% of ferrite, and less than 5.0% of pearlite and has an E value of 10.7 or greater, an I value of 1.020 or greater, a CS value of -8.0 × 105to 8.0 × 105, and a standard deviation of the Mn concentration of 0.60% by mass or less; and in which, at the surface, the area% of a region in which the Ni concentration is 0.2% by mass or greater is 10.0% or greater, the area% of a region in which the O concentration is 3.0% by mass or greater is 3.0-50.0%, a maximum value of the sphere-equivalent diameter of an oxide is 5.00 µm or less, and the tensile strength is 980 MPa or greater.
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.
A cooling floor member (100) cools a battery cell. The cooling floor member (100) comprises: a metal underfloor material (101); a flat plate-like metal floorboard (102) which is disposed opposite the metal underfloor material (101) and a surface of which, on the side opposite the metal underfloor material (101), contacts the battery cell; a partition member (105) that is sandwiched between, without being joined to, the metal underfloor material (101) and the flat plate-like metal floorboard (102); and a joint (130) affording a direct continuous join between an outer peripheral edge of the metal underfloor material (101) and an outer peripheral edge of the flat plate-like metal floorboard (102). A region surrounded by the metal underfloor material (101), the flat plate-like metal floorboard (102), and the partition member (105) is a cooling liquid flow path (104) through which a cooling liquid flows.
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
9.
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 %.
A seamless steel tube having an inner surface and an outer surface, and having a chemical composition of, by mass, 0.06% or less of C, 0.55% or less of Si, 0.70-1.40% of Mn, 0.020% or less of P, 0.0005-0.020% of S, 0.005% or less of N, 0.0005-0.0035% of O, 0.25-0.45% of Cu, 0.50% or less of Ni, 0.20% or less of Mo, and 0.05-0.15% of Sb, with the remainder made up by Fe and impurities, the metal structure containing 90.0% or more of ferrite by area, the average crystal grain diameter of ferrite in the tube inner surface layer being 3.0-20.0 μm, the average crystal grain diameter of ferrite in the tube outer surface layer being 3.0-25.0 μm, the tube inner surface layer and the tube outer surface layer containing MnS and MnS oxide, the number density of MnS being 100/mm2, and the ratio of the number density of MnS oxide relative to the number density of MnS being 0.10 or more.
C21D 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
1 < Ra(D)/Ra(S) ≦ 12 is satisfied in each of at least one pair of block opposing end faces (for example, a pair of block opposing end faces (111a, 111i)). Here, Ra(D) is the surface roughness of the block opposing end face in the stacking direction. Ra(S) is the surface roughness in the main magnetic flux direction (or rolling direction) of the plate surface of a steel plate having an end face that configures a part of the block opposing end face.
Provided is a duplex stainless steel material having excellent whole surface corrosion resistance in a high-temperature, high-pressure, strong acidic corrosive environment, and excellent pitting corrosion resistance in a high-temperature, high-pressure, chloride corrosive environment. The duplex stainless steel material according to the present disclosure has a chemical composition containing, in mass%, 0.050% or less of C, 0.2-1.2% of Si, 0.5-7.0% of Mn, 0.040% or less of P, 0.010% or less of S, 20.0-27.0% of Cr, 4.0-9.0% of Ni, 0.5-5.0% of Mo, 0.0005-0.0100% of As, a total of 0.0005-0.0100% of one or more of Ca and Mg, 0.001-0.050% of sol.Al, 0.40% or less of N, and 0.100% or less of O, with the remainder comprising Fe and impurities, and satisfies relationships (1) and (2). (1) 0.70 < 10000 × As/(Ni + Cu) < 16.00; (2) (Ca + Mg)/O < 1.50
The purpose of the present invention is to provide a grain-oriented electromagnetic steel sheet in which iron loss is improved and which suppresses a decrease in productivity in magnetic domain control in which a laser groove is formed. A grain-oriented electromagnetic steel sheet according to the present invention has multiple grooves in the surface of the steel sheet, and has protrusions at groove lateral parts adjacent to each of the grooves in the surface of the steel sheet. The crystal orientation of at least one crystal grain existing inside each of the protrusions differs by 5°C or more from the goss orientation which is the crystal orientation of crystal grains at portions excluding vicinities of the protrusions in the steel sheet. As a result, iron loss in the electromagnetic steel sheet is improved and a step for removing the protrusions becomes unnecessary.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
This surface-treated steel sheet comprises: a base-material steel sheet; a plating layer formed on a surface of the base-material steel sheet; and a coating film formed on a surface of the plating layer. The plating layer has a Zn concentration between 40 mass% and 100 mass% inclusive, and has an Mg concentration between 0 mass% and less than 4.0 mass%. Between the interface and the center in the thickness direction between the interface and the surface, a maximum concentration of Ti in mass%, a maximum concentration of Zr in mass%, and a maximum concentration of V in mass% satisfy a predetermined relationship. In addition, an average concentration of C in mass% at the central part of the coating film, a maximum concentration of Mg in mass% in the boundary region of the coating film, an average concentration of Mg in mass% at the central part of the coating film, a maximum concentration of F in mass% in the boundary region of the coating film, an average concentration of F in mass% at the central part of the coating film, and an average concentration of Si in mass% at the central part of the coating film satisfy a predetermined relationship.
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
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
This surface-treated steel sheet has a base material steel sheet, a plating layer, a first coating, and a second coating. The plating layer has a Zn concentration of 40%-100% and a Mg concentration of 0% or more and less than 4.0%. The following items satisfy a predetermined relationship: the maximum concentration of Ti, the maximum concentration of Zr, and the maximum concentration of V in the interval from a first interface to the center of the the first coating film in the thickness direction of the first interface and a second interface; the average concentration of C in the central section of the first coating; the average concentration of C in the central section of the second coating; the maximum concentration of Mg in a border area of the first coating; the average concentration of Mg in the central section of the first coating; the maximum concentration of F in the border area of the first coating; the average concentration of F in the central section of the first coating; the average concentration of Si in the central section of the first coating; the average concentration of Zn in the central section of the first coating; and the average concentration of Zn in the central section of the second coating.
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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
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
A wheel (100) comprises a boss section (10), a rim section (20), and a plate section (30). The rim section (20) includes a tread (211) and a flange (212). The plate section (30) includes a curved portion (31). The curved portion (31) is provided so as to be contiguous with the rim section (20). In a vertical cross-sectional view of the wheel (100), the curved portion (31) curves so as to protrude toward the opposite side from the flange (212) in the axial direction of the wheel (100). The apex (313) of the curved portion (31) is located to the outside of the center (Cw) of the plate section (30) in the radial direction of the wheel (100). In the vertical cross-sectional view of the wheel (100), the plate section (30) has a plate thickness that changes along the direction in which the plate section (30) extends. The maximum plate thickness of the plate section (30) is in the curved portion (31).
Provided is a seamless steel pipe in which the difference between the strength at full wall thickness and the strength in a post-cutting state is low. This seamless steel pipe has a prescribed chemical composition. Fn1 represented by formula (1) is 0.44 or higher. The crystal grain size number according to ASTM E112-13 (2021) in a central portion of the wall thickness is 6.0 or higher. Each of NDos/NDc and NDis/NDc is 0.60 or higher, where, with respect to a cross-section perpendicular to the pipe axial direction, NDos is the number density of V-containing particles having a circle equivalent diameter of 10-100 nm at a depth of 2 mm from the outer surface of the steel pipe, Ndis is the number density of V-containing particles having a circle equivalent diameter of 10-100 nm at a depth of 2 mm from the inner surface of the steel pipe, and NDc is the number density of V-containing particles having a circle equivalent diameter of 10-100 nm in the central portion of the wall thickness. Formula (1): Fn1=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15. The atomic symbols in formula (1) are assigned the respective contained amount of the corresponding elements in terms of mass%.
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
21.
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
An objective of the present invention is to provide a grain-oriented electromagnetic steel sheet that exhibits improved iron loss in magnetic domain control for forming laser grooves in a steel sheet that has been subjected to decarburization annealing but has not yet been subjected to final annealing. The grain-oriented electromagnetic steel sheet according to the present invention, which comprises a steel sheet that has a plurality of grooves in the surface thereof, and a glass film that is formed on the surface of the steel sheet, is characterized in that: the absolute value of the angle θ formed by the longitudinal direction of the grooves and the direction perpendicular to the rolling direction and the sheet thickness direction the steel sheet is 0-40°, the width W of the grooves is 20-300 μm, the depth D of the grooves is 10-40 μm, and the spacing P between the grooves in the rolling direction is 1.0-30 mm; and relational expression (1) is satisfied, where t1 is the thickness of the portions of the glass film on the flat portions (portions other than the grooves) of the surface of the steel sheet, and t2 is the thickness of the portion of the glass film at the deepest portion of the grooves. (1): t2/t1<1.00
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 present disclosure provides a high-strength steel plate having an improved post-molding appearance. The steel plate of the present disclosure has a specific chemical composition and is characterized by comprising a metal structure that includes 75-97% of ferrite and 3-25% of a hard phase in terms of area, the standard deviation of the hard phase percentage for the rolling right-angle direction being 0.75% or less.
The present invention addresses the problem of providing a surface-treated steel sheet that particularly improves resistance to surface contact scratch caused by contact between one surface and the other surface as a further improvement in scratch resistance, and that has excellent corrosion resistance. The surface-treated steel sheet has, on either surface thereof, a plating layer, a first coloring membrane layer, and a second coloring membrane layer. The ratio of the film thickness of the second coloring membrane layer to the film thickness of the first coloring membrane layer is between 0.1 and 0.5 inclusive. The first coloring membrane layer and the second coloring membrane layer contain resin particles. The proportion of the number of the resin particles having a thickness greater than or equal to the film thickness of the first coloring membrane layer is between 1% and 30% inclusive. The proportion of the number of the resin particles having a thickness greater than or equal to the film thickness of the second coloring membrane layer is between 50% and 100% inclusive.
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
A precoated steel sheet according to the present invention addresses the problem of achieving more excellent scratch resistance and more excellent coating film adhesion even in cases where a coating film has a large film thickness. This precoated steel sheet comprises a Zn-containing plating layer, a chemical conversion coating layer containing at least zirconium, and a coating layer; the coating layer contains at least a binder resin and resin particles; the average thickness of the coating film is 3 µm to 10 µm; the intensity of zirconium at the Zn-containing plating layer-side interface of the coating layer is 1.05 to 3.00 times the average intensity of zirconium in the range of 1 µm to 2 µm from the surface of the coating film as calculated based on the depth profile of the zirconium distribution of the coating film as determined by glow discharge optical emission spectrometry; and if a cross-section of the coating film in the thickness direction is examined, the average area ratio of the resin particles in a region having a length of 60 µm in a direction that is perpendicular to the thickness direction is 5% to 30%.
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
This non-oriented electromagnetic steel sheet includes a steel sheet and the chemical composition of the steel sheet contains, in mass%, 0.0030% or less of C, 1.0-3.5% of Si, 0.10-2.00% of Al, 0.1-2.0% of Mn, 0.20% or less of P, 0.0030% or less of S, 0.0030% or less of N, 0.0030% or less of Ti, 0.0020% or less of B, 0-0.200% of Sn, and 0-0.1000% of Sb, with the remainder comprising Fe and impurities, wherein [Sn] and [Sb], which are the content of Sn and the content of Sb, in mass%, respectively, satisfy [Sn]+2×[Sb]≤0.200, and WH/WL, which is the ratio between the maximum value WH and the minimum value WL of core loss W10/400, is 1.10 or less (when the width of the steel sheet is W, W/10 part, W/4 part, and W/2 part are the part at the W/10 position, the part at the W/4 position, and the part at the W/2 position of the sheet width from the end in the width direction, respectively).
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
This steel plate has a given chemical composition and has an α value of 1.00-1.50 mass%, a β value of 10.0-15.0, a γ value of 0.70-1.50 mass%, a Ceq value of 0.550-0.620 mass%, a yield strength of 670-870 N/mm2, a tensile strength of 780-940 N/mm2, and a Charpy absorption energy at -65°C of 100 J or greater. When the steel plate is examined for hardness distribution at a pitch of 0.05 mm with respect to 121 portions of 1 mm × 1 mm located at 1/4 the plate thickness, the average hardness is 265-290 Hv and the standard deviation is 20 or less. The steel plate has a thickness of 10-60 mm.
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
B21B 1/38 - 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 sheets of limited length, e.g. folded sheets, superimposed sheets
Provided is a solid wire for submerged arc welding, wherein: the chemical composition of the solid wire, in terms of mass% with respect to the total mass of the solid wire is 0-0.650% C, 0.03-0.50% Si, 4.1-30.0% Mn, 0-0.050% P, 0-0.050% S, 0-5.0% Cu, 1.0-30.0% Ni, 0-10.0% Cr, 0-10.0% Mo, 0-1.00% Nb, 0-1.00% V, 0-1.00% Co, 0-1.00% Pb, 0-1.00% Sn, 0-0.10% Al, 0-0.10% Ti, 0-0.1000% B, 0-0.5000% N, and 0-0.0050% O, with the remainder being Fe and impurities; (Mn+Ni) is not less than 5.0%; (Mn+Ni+Cr) is not less than 15.0%; and the fcc ratio is not less than 70%.
The present invention provides a coated arc welding rod comprising a steel core wire and flux coating the core wire, wherein the chemical composition of the core wire is as follows: C: 0% to 0.650%, Si: 0.03% to 0.50%, Mn: 2.1% to 30.0%, P: 0% to 0.050%, S: 0% to 0.050%, Cu: 0% to 5.0%, Ni: 1.0% to 30.0%, Cr: 0% to 10.0%, Mo: 0% to 10.0%, Nb: 0% to 1.00%, V: 0% to 1.00%, Co: 0% to 1.00%, Pb: 0% to 1.00%, Sn: 0% to 1.00%, Al: 0% to 0.10%, Ti: 0% to 0.10%, B: 0% to 0.1000%, N: 0% to 0.5000%, remainder: Fe and impurities; (Mn + Ni) is 5.0% or more; (Mn + Ni + Cr) is 15.0% or more; and the fcc ratio in the core wire is 70% or more.
This flux cored wire comprises a steel exterior skin and flux, where the chemical composition of the steel exterior skin is: 0 to 0.650% of C; 0.03-0.50% of Is; 3.1-30.0% of Mn; 0-0.050% of P; 0-0.050% of S; 0-5.0% of Cu; 1.0-30.0% of Ni; 0-10.0% of Cr; 0-10.0% of Mo; 0-1.0% of Nb; 0-1.0% of V; 0-1.0% of Co; 0-1.0% of Pb; 0-1.0% of Sn; 0-0.10% of Al; 0-0.10% of Ti; 0-0.1000% of B; 0-0.500% of N; and the remainder being Fe and impurities. The flux cored wire satisfies Mn + Ni ≥ 5.0% and Mn + Ni + Cr ≥ 15.0%, and the fcc percentage of the steel exterior skin is at least 70%.
Provided is a weld metal comprising: 0.030-1.000% of C; 0.03-0.50% of Si; 4.1-30.0% of Mn; 0-0.050% of P; 0-0.050% of S; 0-5.0% of Cu; 1.0-30.0% of Ni; 0-20.0% of Cr; 0-10.0% of Mo; 0-1.000% of Nb; 0-1.00% of V; 0-1.00% of Co; 0-1.00% of Pb; 0-1.00% of Sn; 0-20.0% of W; 0-5.0% of Mg; 0-0.100% of Al; 0-5.0% of Ca; 0-0.100% of Ti; 0-0.5000% of B; 0-0.500% of REM; 0-0.500% of Zr; 0-0.5000% of N; and 0.0010-0.1500% of O, with the balance being Fe and impurities, wherein Mn+Ni is at least 5.0%, and Nb+Ti+V+Al is at least 0.005%.
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
This non-oriented electromagnetic steel sheet comprises a base steel sheet and an insulating coating film, in which the base steel sheet has a specified chemical composition, the base steel sheet has a thickness of 0.10 mm to 0.35 mm inclusive, and the average crystal grain diameter is 10 μm or less in a surface region lying between the surface of the base steel sheet and a depth of 1/20 the thickness of the base steel sheet when a cross-section of the base steel sheet which is cut in a direction parallel to the thickness direction is observed.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
H01F 1/147 - Alloys characterised by their composition
H01F 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 cut-processed product of a Zn-Al-Mg-based plated steel material comprising a base steel material and a Zn-Al-Mg-based plating layer coated on the surface of the base steel material, in which a cut edge surface of the cut-processed product is covered by the Zn-Al-Mg-based plating layer at a cut edge surface covering ratio of 50 to 99%, each of a non-plated surface of the base steel material and the Zn-Al-Mg-based plating layer around the non-plated surface is covered with a repairing coating film in the cut edge surface of the cut-processed product, the initial coating film resistance value in the repairing coating film is 10 to 1000 Ω/cm2, the coating film resistance value after the immersion of the cut-processed product in 5%-by-mass salt water for 3 hours is 5 to 50 Ω/cm2, and the thickness of the repairing coating film is 10 μm or more; and a guardrail in which the cut-processed product is used.
C23F 11/00 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
B23D 15/00 - Shearing machines or shearing devices cutting by blades which move parallel to each other
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
E01F 15/04 - Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips
Provided is a cut article of a Zn-Al-Mg-plated steel material having a base steel material and a Zn-Al-Mg plating layer covering the surface of the base steel material, wherein a cut end surface of the cut article is coated with a linear film in which components of the Zn-Al-Mg plating layer flow in a linear fashion, the percentage of the cut end surface coated with the linear film is 60-90%, the non-plated surface of the base steel material and the linear film around the non-plated surface on the cut end of the cut article are coated with a repair coating film, the initial coating film resistance value of the repair coating film is 10-1000 Ω/cm2, the coating film resistance value after the cut article has been immersed in 5 mass% brine for three hours is 5-50 Ω/cm2, and the thickness of the repair coating film is 10-100 μm. Also provided is a guardrail in which the cut article is utilized.
C23F 11/00 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
B23D 15/00 - Shearing machines or shearing devices cutting by blades which move parallel to each other
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
E01F 15/04 - Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips
The present invention pertains to a composition that may undergo α-γ transformation. The composition contains 0.0010-0.0050% of Ti. When a surface of a steel sheet is measured using a scanning electron microscope with electron backscatter diffraction (SEM-EBSD) and if the area ratio of crystal grains in a {hkl} orientation (tolerance: within 10°) with respect to the entire visual field is represented by Ahkl-uvw, A411-011 is at least 15%, and the number density of deposits is 0.5-50 pieces/μm2.
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 present invention provides a martensitic stainless steel material which has high strength, excellent SSC resistance, and excellent toughness at low temperatures. A martensitic stainless steel material according to the present disclosure contains, in mass%, 0.030% or less of C, 1.00% or less of Si, 1.00% or less of Mn, 0.030% or less of P, 0.0050% or less of S, 10.00% to 16.00% of Cr, 4.00% to 7.50% of Ni, 1.10% to 3.50% of Mo, 0.005% to 0.050% of Al, 0.01% to 0.30% of V, 0.0030% to 0.0500% of N, 0.020% to 0.150% of Ti, 0.01% to 3.50% of Cu and 0.01% to 0.50% of Co, while having a yield strength of 758 MPa or more. With respect to this martensitic stainless steel material, the area ratio Sd (%) of δ ferrite and the area ratio Sc (%) of an intermetallic compound in a cross-section that is parallel to the rolling direction satisfy formula (1) and formula (2). (1): 0 < Sd ≤ 10.00 (2): Sc/Sd ≤ 5.00
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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.
A method for manufacturing a press-molded article (300, 400) comprises: sandwiching a blank (200) between a die (20, 20B) and a blank holder (30, 30A-30F); and using a punch (10, 10B) to push in the blank (200) in a pressing direction (Z). When viewed from the pressing direction (Z), a rim (24) of the die (20, 20B) on the punch (10, 10B) side thereof includes a curved section (241) that is curved convexly on the punch (10, 10B) side and that extends with a radius of curvature less than 400 mm. When viewed from the pressing direction (Z), a space (C) between a rim (34) of the blank holder (30, 30A-30F) on the punch (10, 10B) side thereof and the rim (24) of the die (20, 20B) on the punch (10, 10B) side thereof varies along the rim (24) of the die (20, 20B), said space being on a perpendicular line in the direction of extension of the rim (24) of the die (20, 20B), When viewed from the pressing direction (Z), the spacing (C) is smallest at the curved section (241).
This grain-oriented electrical steel sheet comprises a base steel sheet, a forsterite coating film formed on the surface of the base steel sheet, and an insulation film formed on the surface of the forsterite coating film, wherein: the chemical composition of the base steel sheet contains 0.80 to 7.00% by mass of Si; the area ratio of crystal grains having a distance in the rolling direction between crystal grain boundaries in the surface of the base steel sheet of 3.0 mm to 13.0 mm inclusive is 70% or more; B8 that is a magnetic flux density generated by a magnetic force of 800 A/m is 1.88 T or more; W17/50 that is an iron loss where the frequency is 50 Hz and the maximum magnetic flux density is 1.7 T is 13.1×t2-4.3×t+1.2 (W/kg) or less where the sheet thickness is t (mm); and LvA200Hz that is a 200 Hz component of a magnetostriction waveform is 60 to 78 dBA.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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.
Provided is a traverse hardening method which is characterized by using a traverse hardening device (100) equipped with a plurality of high frequency coils, and by involving: rotating a shaft-like body (10), which is inserted inside the plurality of high frequency coils (111), relative to the plurality of high frequency coils (111); moving the plurality of high frequency coils (111) axially relative to the shaft-like body (10); performing traverse hardening by moving a plurality of heating areas which are generated on the surface of the shaft-like body (10) by the plurality of high frequency coils (111); and changing at least one of the rotation speed of the shaft-like body (10) relative to the plurality of high frequency coils (111) and the moving speed of the plurality of high frequency coils (111) relative to the shaft-like body (10) in the axial direction such that a plurality of heating zones, which the plurality of heating areas pass through, overlap each other or lie adjacent to each other.
Provided is a mobile hardening method characterized in that a shaft body (10) is heated by a plurality of high-frequency coils (111), a cooling unit (120) is caused to follow the high-frequency coils (111) from behind in the relative moving direction of the high-frequency coils (111) along the axial direction of the shaft body (10), the part heated by the high-frequency coils (111) is cooled by the cooling unit (120), and mobile hardening is carried out while moving the high-frequency coils (111) toward the direction perpendicular to the axial direction of the shaft body (10) so that the distances from the surface of the shaft body (10) to the respective high-frequency coils (111) are constant, wherein the speed in the axial direction of the high-frequency coils (111) at the time when the high-frequency coils (111) pass through a step part (13) is slower than the speed in the axial direction of the high-frequency coils (111) at the time when the high-frequency coils (111) pass through a small diameter part (12) or a large diameter part (11).
Provided is a high-strength hot-rolled steel sheet having a predetermined chemical composition, wherein at all of the positions of 1/10W, 3/10W, 5/10W, 7/10W, and 9/10W from the end in the width direction (W is the total width in the direction perpendicular to the rolling direction and the sheet thickness direction), the metal structure at 1/4 position of the sheet thickness contains, in area%, at least 95% of tempered martensite, 5% or less of fresh martensite, and 5% of less in total of at least one among ferrite, upper bainite, and pearlite, and the difference between the maximum and minimum tensile strengths at all of the positions in the width direction is 30 MPa or less.
Provided is an austenite alloy material having excellent nitriding resistance in a high-temperature ammonia environment. The austenite alloy material of the present disclosure contains, in mass%, C: more than 0 to 0.200%, Si: more than 0 to 3.00%, Mn: more than 0 to 3.00%, P: more than 0 to 0.050%, S: more than 0 to 0.050%, Ni: 40.00 to 80.00%, and Cr: 10.00 to 35.00%, also contains one or more selected from the group consisting of Sn, Zn, Pb, Sb, As, and Bi, also contains one or more selected from the group consisting of Cu, Mo, Co, W, Ti, Nb, V, B, N, rare earth elements, Al, Ca, and Mg, with the remainder comprising Fe and impurities. Fn1 is less than 20, and Fn2 is higher than 21 and less than 50. Fn1=177.84+11.12Si-24.36Mn-8.11Cu-1.61Cr-1.78Ni-2.68Mo Fn2=(Sn+Zn+Pb+Sb+As+Bi)×103
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
C22C 30/04 - Alloys containing less than 50% by weight of each constituent containing tin or lead
C22C 30/06 - Alloys containing less than 50% by weight of each constituent containing zinc
C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
47.
BATTERY CASE OF AUTOMOBILE AND METHOD FOR MANUFACTURING THE SAME
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
48.
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.
232232322, 0-10.00% MnO, and 0-10.00% metallic Cr, the remainder comprising impurities. A method for manufacturing a welded joint according to another embodiment of the present invention comprises a step for submerged-arc-welding a steel material using the abovementioned baked flux.
This slag amount estimation method includes: capturing, with a single imaging device, an image of a slag flow which flows out from an outlet of a refining vessel and expands in width in the upstream rather than in the downstream; finding the width of the slag flow from the captured image and then finding a volume flow rate or mass flow rate; and estimating an amount of slag on the basis of the found volume flow rate or mass flow rate.
[Problem] To maintain the corrosion resistance of the outer surface of a lithium ion battery even if an electrolyte solution has adhered to the outer surface of the lithium ion battery. [Solution] The present invention relates to a lithium ion battery in which a battery unit that comprises a positive electrode, a negative electrode and a separator and an electrolyte solution that contains a lithium salt are housed in a housing case that has a main body part and a cover part, wherein: an Ni-plated steel sheet or a laminated steel sheet is used as the material of the housing case; at least either a first sealing part which seals the main body part and the cover part or a second sealing part which seals the cover part and a liquid injection port cover for sealing a liquid injection port that is provided in the cover part and is for injecting the electrolyte solution into the housing case; and the first sealing part or the second sealing part has a film part which contains at least one of a Ca compound, an Al compound and an La compound on a portion that has an Fe content of 80% by mass or more.
H01M 50/103 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
H01M 50/122 - Composite material consisting of a mixture of organic and inorganic materials
H01M 50/126 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
H01M 50/128 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers with two or more layers of only inorganic material
H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
H01M 50/167 - Lids or covers characterised by the methods of assembling casings with lids by crimping
H01M 50/169 - Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
H01M 50/184 - Sealing members characterised by their shape or structure
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.
(Problem) The purpose of the present invention is to provide a method for recovering rare-earth elements comprising, while recovering scandium from iron and steel slag, crudely separating scandium and a rare-earth element other than scandium. (Solution) The method is characterized by multiple leaching at different pH ranges of rare-earth elements including scandium from iron and steel slag. The present invention is characterized by further combining a leachate obtained by the method with an element separation step to allow highly efficient recovery of scandium.
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
A wheel (100) comprises a boss part (10), a rim part (20), and a plate part (30). The boss part (10) includes a contour line (14) extending from the plate part (30) to an end face (12) in the axial direction of the boss part (10) when viewed in a longitudinal cross-section of the wheel (100). The contour line (14) includes curves (141, 142). The first curve (141) is continuous with the plate part (30). The first curve (141) has a first curvature radius (R1). The second curve (142) is positioned on the side of the end face (12) in the axial direction of the boss part (10) with respect to the first curve (141). The second curve (142) has a second curvature radius (R2). The second curvature radius (R2) is larger than the first curvature radius (R1). The length of the second curve (142) is longer than that of the first curve (141).
Provided is a plated steel sheet having high LME resistance. A plated steel sheet according to the present invention is characterized by having a prescribed chemical composition and is characterized in that: when the C-concentration is measured by GDS in the depth direction of a base steel sheet starting from the interface between the base steel sheet and a plating layer, the depth at which the C-concentration is 0.05% or less is 10 μm or more; the thickness of a layer where the area percentage of a ferrite phase is 90% or more is at least 20 μm in the depth direction from the surface of the base steel sheet; and the roughness expressed as Ra of the interface between the base steel sheet and the plating layer is 3.0 μm or less.
The present invention addresses the problem of providing a steel sheet and a plated steel sheet that have high LME resistance and hydrogen desorption. This steel sheet and plated steel sheet are characterized: by having prescribed chemical components; in that the depth in the depth direction from the surface of the steel sheets at which the C concentration as measured by GDS is no more than 0.05% is at least 10 μm; in that the thickness in the depth direction from the surface of the steel sheets of a layer that has a ferrite phase area fraction of at least 90% is at least 20 μm; and in that the Ra surface roughness of the steel sheets is no more than 3.0 μm.
This hot-rolled steel sheet has a specific chemical composition; the metal structure of this hot-rolled steel sheet at a position where the depth from the surface is 1/4 in the sheet thickness direction comprises, in area%, less than 3.0% of residual austenite, not less than 15.0% but less than 60.0% of ferrite and less than 5.0% of pearlite, while having an E value of 10.7 or more, an I value of 1.020 or more, a CS value of -8.0 × 105to 8.0 × 105, and a standard deviation of the Mn concentration of 0.60% by mass or less; the average solid solution Cr concentration in the outermost layer region is 0.10% by mass or more; and the average number density of Cr oxides having a sphere equivalent radius of 0.1 µm or more in the surface is 1.0 × 104per cm2 or less.
A laminated core 10 is formed by alternately laminating electromagnetic steel sheets 1 and adhesive insulating films 2. After completion of reaction of the adhesive insulating films 2, the tensile adhesive strength in a laminating direction D of the laminated core 10 is 20 MPa or higher when measured under a condition at 25°C. A method for manufacturing the laminated core 10 comprises: a punching step for punching electromagnetic steel sheets coated with the adhesive insulating films 2 and forming the electromagnetic steel sheets 1; a storage step for laminating and storing the electromagnetic steel sheets 1 in a mold after the punching step; a low-pressure adhesion step for heating the electromagnetic steel sheets 1 in the mold at a surface temperature of 60-200°C, applying pressure on the electromagnetic steel sheets at 3.0 MPa or lower, and bonding the adjacent electromagnetic steel sheets 1 to each other, to thereby form the laminated core 10; and a taking-out step for taking out the laminated core 10 from the mold after the low-pressure adhesion step.
H01F 3/02 - Cores, yokes or armatures made from sheets
H01F 27/245 - Magnetic cores made from sheets, e.g. grain-oriented
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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
This laminated iron core manufacturing method comprises: a step for pressing electromagnetic steel sheets each having a coating containing an adhesive agent which exhibits adhesiveness via heating provided to a sheet surface thereof with a mold (2) and converting the same into unit iron cores (1); and a step for layering the unit iron cores (1) pressed with the mold (2), heating a plurality of partial regions of the sheet surface of the unit iron core (1) of the uppermost layer, and partially bonding the same to the unit iron core (1) of a lower layer thereto in the plurality of regions. Thereby, pressing machining and laminating are performed substantially simultaneously as a series of operations, and it is possible to increase the efficiency of laminated iron core manufacturing without increasing person-hours.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
The present invention addresses the problem of providing a welded joint inhibited from having undergone LME cracking during the production. This welded joint is characterized in that: the welded joint is configured of plated steel plates having given chemical components; in the non-heat-affected portion of each plated steel plate, the depths at which the concentration of C as determined by GDS is 0.05% or less are 5 μm or greater from the interface as a starting point between the plating layer and the base steel plate along the base depth direction; in a cross-section of the non-heat-affected portion of the steel plate, the interface between the plating layer and the base steel plate has a roughness of 3.0 μm or less in terms of Ra; and in the range of 0-100 μm from each edge of the bead of the weld in the direction opposite from the weld, the concentration of C in the base steel plate at a depth of 5 μm from the interface as a starting point between the plating layer and the base steel plate is 0.05% or less.
The present invention addresses the problem of providing a welded joint in which LME cracking during manufacturing is suppressed. A welded joint according to the present invention is characterized in that: a plated steel sheet forming the welded joint has a prescribed chemical composition; when the C-concentration is measured by GDS in a thermally non-affected portion of the welded joint in the depth direction of a base steel sheet starting from the interface between the base steel sheet and a plating layer of the plated steel sheet, the depth at which the C-concentration is 0.05% or less is 10 μm or more; the roughness expressed as Ra of the interface between the base steel sheet and the plating layer of the plated steel sheet in the thermally non-affected portion is 3.0 μm or less; and, at a position 500 μm apart from an end of a pressure welded portion of the welded joint, the thickness of a layer where the area percentage of a ferrite phase is 90% or more is at least 15 μm in the depth direction of the base steel sheet starting from the interface between the base steel sheet and the plating layer of the plated steel sheet.
Provided is a steel plate characterized by having a predetermined chemical composition and having a metal structure including, in terms of area percentage, 80-95% of ferrite, 5-20% of martensite, and a total of 0-10% of at least one of bainite, pearlite, and retained austenite, and having the average grain spacing of martensite of 2.5 μm or less, and the standard deviation of 1.5% or less in the area ratio of martensite in the direction perpendicular to the rolling direction and the sheet thickness direction.
This steel sheet has a base steel sheet that has a prescribed chemical composition and a galvanization layer that is formed on the surface of the base steel sheet, wherein: where the sheet thickness of the base steel sheet is t, the metallographic structure of the base steel sheet at a t/4 location, which is a location at a depth of t/4 from the surface in a cross section in the sheet thickness direction, includes at least 85% of tempered martensite, at least 7% of retained austenite, and 0-8% of at least one substance selected from ferrite, pearlite, bainite, and fresh martensite by volume; the metallographic structure in a surface region, which is the range up to a location 50 μm from the surface in the cross section in the sheet thickness direction, includes at least 30% of bainite by volume, where the remainder is at least one substance selected from ferrite, pearlite, tempered martensite, fresh martensite, and retained austenite; and prior austenite grains in the surface region have a diameter in the sheet thickness direction of no more than 10.0 μm and a tensile strength of at least 1,470 MPa.
The present invention provides a plated steel material and a method for manufacturing same, the plated steel material comprising a base steel material and a plating layer, wherein the plating layer includes a Zn-Al-Mg alloy layer disposed on a surface of the base steel material and a Mg-rich layer disposed on a surface of the Zn-Al-Mg alloy layer, and the thickness of the Mg-rich layer is 0.8 μm or more and is equal to or less than [the thickness of plating layer × 1/2].
bMbMtMtMbMbM in formula (1) and formula (2) is the concentration, in mass%, of the metal element M at a position of 0.95H from the surface of the surface treatment film.
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
B32B 9/00 - Layered products essentially comprising a particular substance not covered by groups
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
C21D 1/18 - Hardening; Quenching with or without subsequent tempering
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
This hot-rolled steel sheet has a desired chemical composition; the metal structure of this hot-rolled steel sheet at a position where the depth from the surface is 1/4 in the sheet thickness direction comprises, in area%, less than 3.0% of residual austenite, not less than 15.0% but less than 60.0% of ferrite and less than 5.0% of pearlite; alloy carbides in the ferrite has an average sphere equivalent radius of not less than 0.5 nm but less than 10.0 nm, and an average number density of not less than 0.10 × 1016per cm3but less than 1.45 × 1016per cm3; the E value that indicates the periodicity of the metal structure is 10.7 or more; the I value that indicates the uniformity of the metal structure is 1.020 or more; and the standard deviation of the Mn concentration is 0.60% by mass or less.
222/Zn ternary eutectic structure is 0% to 65%, with the remainder being 0% to 5.0%, and the total area ratio of the Al phase and the Zn-Al phase with respect to the Al-Zn phase ([Al]+[Zn-Al])/[Al-Zn]) is 0.8 or more.
Provided is a surface-treated steel sheet with which it is possible to obtain exceptional corrosion resistance, adhesion with respect to an adhesive, and blackening resistance, and furthermore to obtain exceptional condensation discoloration resistance. In a surface-treated steel sheet according to the present embodiment, a plating layer contains, in terms of mass%, more than 5.0% and less than 25.0% of Al, and more than 3.0% and less than 12.5% of Mg, the balance being 65.0% or more of Zn and impurities. A chemical conversion coating formed on the plating layer contains Zr, V, P, and Co, and an acrylic resin. The mass [V]mg/m2of V and the mass [P]mg/m2of P in the chemical conversion coating satisfy relationship (1), and the mass [V]mg/m2 of V and the Mg content [Mg]b mass% of the plating layer satisfy relationship (2). [Relationship (1)] 0.60≤[V]/[P]≤2.80; [Relationship (2)] 0<[V]/[Mg]b≤20.00
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
C23C 2/06 - Zinc or cadmium or alloys based thereon
C23C 22/60 - 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 alkaline aqueous solutions with pH > 8
78.
MIXED POWDER, MGO PARTICLES, METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR PRODUCING MGO PARTICLES, AND METHOD FOR PRODUCING MIXED POWDER
A mixed powder for an annealing separating agent having MgO as a main ingredient, wherein the average particle diameter of the mixed powder is 0.10 to 8.50 µm, the mixed powder contains B, the content of B in the entire mixed powder is 0.005 mass% or more and less than 0.040 mass%, the proportion of 3-coordinate boron among the B is 5 mass% or more and less than 70 mass%, and the ratio of circumference to thickness of primary particles containing the MgO is 6.0 or more.
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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
On the basis of measured sensor information obtained from some bogies, of a railway vehicle, having sensors mounted thereon, this inference device makes inference on the condition of a bogie of another railway vehicle that has the same condition as the bogies of said railway vehicle but has no sensor mounted thereon.
This steel material has an average chemical composition containing 18.00-36.00% of Ni and 5.50-12.00% of Si and has a metal structure that includes an austenite phase and an ordered phase. This automobile component comprises the steel material.
A plated checkered steel plate comprising, on one plate surface, a base checkered steel plate provided with protruding parts having a height of 3 mm or less and flat parts, a plating layer including a zinc-based alloy layer arranged on the plate surface of the base checkered steel plate where the protruding parts and flat parts are provided, and a chemical conversion coating layer provided on the surface of the plating layer, wherein the film thickness of the chemical conversion coating layer on the flat parts of the base checkered steel plate is 0.10 to 5.00 μm per side, and the film thickness ratio of the chemical conversion coating layer on the protruding parts and the flat parts of the base checkered steel plate (film thickness of the chemical conversion coating layer on the flat parts/film thickness of the chemical conversion coating layer on the protruding parts) is 0.2 to 5.0.
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
83.
MIXED POWDER, MGO PARTICLES, METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR PRODUCING MGO PARTICLES, AND METHOD FOR PRODUCING MIXED POWDER
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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.
This manufacturing method for a press-formed product comprises: sandwiching a blank (10) between a support surface (140) of a first press mold (100) and a support surface (340) of a third press mold (300); and pushing a second press mold (200) into the first press mold (100) to draw-form the blank (10). A ridgeline (130) at an edge of a press hole (123) of the first press mold (100) is provided with a curved region (131) that extends in a curved manner. When a prescribed corner end (11) is defined, the corner end (11) between an intersection M and an intersection N of the blank (10) includes all of a line segment MO and all of a line segment NO, and a portion of the corner end (11) is outside an area between the line segment MO and the line segment NO.
[Problem] The purpose of the present invention is to provide: an iron and steel slag modification method which is capable of modifying iron and steel slag so that a specific mineral phase of the iron and steel slag contains a rare earth element-enriched phase, wherein a rare earth element is concentrated, when the rare earth element in the iron and steel slag is recovered; and iron and steel slag which has a rare earth element-enriched phase. [Solution] An iron and steel slag modification method which comprises a step for melting iron and steel slag that contains a rare earth element, and a step for adding a phosphate to the iron and steel slag; and iron and steel slag which has a rare earth element-enriched phase.
C22B 9/10 - General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor
The present invention comprises bringing heating units (212a to 212l, 222a to 222l) into contact with regions to be heated (11a to 11l) of outermost electromagnetic steel sheets (10a, 10b) of an electromagnetic steel sheet group (100) to pressurize and heat the regions to be heated (11a to 11l) at once.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
The present invention provides a duplex stainless steel material which has excellent intergranular corrosion resistance. A duplex stainless steel material according to the present disclosure is composed of, in mass%, 0.030% or less of C, 0.50% or less of Si, 2.00% or less of Mn, 0.040% or less of P, 0.0010% or less of S, 26.0% to 28.0% of Cr, 6.0% to 10.0% of Ni, 0.20% to 1.70% of Mo, more than 2.00% but not more than 3.00% of W, more than 0.30% but not more than 0.40% of N, 0.020% or less of O and 0.050% or less of Al, with the balance being made up or Fe and impurities; and if the longitudinal direction and the thickness direction of three rectangular regions thereof are respectively defined as direction L and direction T, and five line segments that divide each region into six equal parts in direction L are defined as line segments LS, the average thickness TF of ferrites overlapping with 15 line segments LS is 2.50 µm to 4.50 µm, the sample standard deviation ∆TF of the ferrite thickness is 0.50 µm or less, and the average thickness TA of austenites overlapping with the line segments LS is 2.50 µm to 4.50 µm.
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C21D 9/08 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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.
[Problem] To provide a coated metal sheet which can be produced in a simpler manner, can further improve an anti-viral function, and has durability. [Solution] The present invention relates to a coated metal sheet having a metal sheet and a coating layer located on at least one surface of the metal sheet, in which the metal sheet has a zinc-containing metal layer containing at least zinc on at least one surface thereof, and also has, as the coating layer, a first coating layer located on the outermost surface of the coated metal sheet and containing at least a compound having a photocatalytic activity, the average thickness of the first coating layer is 0.05 to 5.00 μm, the total thickness from the surface of the zinc-containing metal layer to the outermost surface of the first coating layer is 15.00 μm or less, and the concentration of zinc ions eluted into a virus-containing solution is 0.60 to 5.00% by mass when the anti-virus test prescribed in JIS R1756:2020 is performed for 4 hours.
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
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
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%.
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
Provided is a steel plate characterized by having: a specific chemical composition; an average Vicker's hardness Hs, in a region spanning from at least one surface to 10% of the plate thickness, that is no greater than 0.60 times the average Vicker's hardness Hc at a position of 1/2 the plate thickness; a ratio of macroscopic brittle fracture surface of 35.0% or less as determined by a Charpy impact test at room temperature; and a tensile strength of 1500 MPa or greater.
