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WO/2023/032225A1 |
This hot-rolled steel sheet has a specific chemical composition; and the metal structure of the inner region of this hot-rolled steel sheet contains, in area ratios, a total of 40% to 80% of martensite and/or bainite, and 20% to 60% of f...
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WO/2023/026819A1 |
Provided is a high-strength steel sheet having a tensile strength of 1180 MPa or above and an excellent component strength, stretch flangeability, bendability, and delayed fracture resistance The high-strength steel sheet comprises a ste...
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WO/2023/026465A1 |
This steel plate has: a chemical composition containing, by mass, 0.040-0.100% of C, 1.00-2.00% of Mn, 0.005-1.500% of Si, 0.100% or less of P, 0.0200% or less of S, 0.005-0.700% of Al, 0.0150% or less of N, and 0.0100% or less of O, the...
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WO/2023/026903A1 |
A rack portion (21) comprises a hardened layer (26) provided over the entire circumference in a radially outer portion including rack teeth (20). A depth (tb) of a portion of the hardened layer (26) located on the opposite side of the ra...
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WO/2023/027129A1 |
The present invention addresses the problem of providing: a ferritic stainless steel which has a wide adequate quenching temperature range, while having high hardness and excellent corrosion resistance after quenching, and which serves a...
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WO/2023/026621A1 |
To provide a roller bearing capable of suppressing the occurrence of white etching area flaking. A roller bearing comprising a structure in which the dissolved carbon content in the martensite structure after heat treatment is 0.35-0.65 ...
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WO/2023/027778A1 |
A steel sheet has a chemical composition containing a predetermined amount of C, Si, Mn, Cu, P, S, Al, and N, and optionally a predetermined amount of one or more selected from the group consisting of Ti, B, Nb, Cr, V, Mo, Ni, As, Sb, Sn...
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WO/2023/026582A1 |
Provided is a hot-rolled steel plate that has a prescribed chemical composition, the microstructure thereof being, in terms of surface area ratio, at least 70% pearlite, 0 to 30% ferrite, and 0 to 30% bainite. The perlite has, per 10 μm...
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WO/2023/026774A1 |
The present invention addresses the problem of suppressing unevenness in the shape of a metal sheet, generated when performing quench hardening thereof.　A metal-sheet quench-hardening apparatus (1) cools a metal sheet (S) while conveyi...
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WO/2023/026773A1 |
The present invention suppresses shape variation of a metal sheet which occurs at the time of quenching.　This metal sheet quenching device (1) is for cooling a metal sheet while conveying the metal sheet and comprises a cooling device ...
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WO/2023/022044A1 |
This gearbox shaft (1) is used for a gearbox and has a raceway surface on which needle rollers (2) roll. The gearbox shaft (1) comprises a base material (11) and a ferrosoferric oxide coating (12). The base material (11): is formed from ...
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WO/2023/020931A1 |
The invention relates to a flat steel product for hot working, a worked steel sheet part, a process for manufacturing the flat steel product and a process for manufacturing the worked steel sheet product, the flat steel product and the s...
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WO/2023/022134A1 |
The present disclosure provides a configuration by which a motor core can be degreased prior to stress-relief annealing without the provision of a heating device or a vacuum device dedicated for degreasing. A heat treatment furnace accor...
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WO/2023/022129A1 |
The present invention provides a precipitation-hardening martensitic stainless steel that: contains, by mass, 0.01-0.07% of C, 1.0-2.5% of Si, 0.1-2.5% of Mn, 0.04% or less of P, 0.0020% or less of S, 4.0-10.0% of Ni, 11.0-17.0% of Cr, 0...
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WO/2023/020932A1 |
The invention relates to a flat steel product for hot working, a worked steel sheet part, a process for manufacturing the flat steel product and a process for manufacturing the worked steel sheet product, the flat steel product and the s...
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WO/2023/018101A1 |
The present invention relates to high-hardness bulletproof steel having excellent low-temperature toughness, and a manufacturing method therefor. More specifically, the present invention relates to high-hardness bulletproof steel having ...
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WO/2023/018270A1 |
The present invention relates to a steel sheet having high strength and high toughness, and a manufacturing method therefor, and, more specifically, to a steel sheet, which has high strength and high toughness and can be used for a vehic...
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WO/2023/017844A1 |
This joined part includes: a first steel member; a second steel member; and a joined portion that is formed at a portion where the first steel member adjoins the second steel member and that includes a welding metal and a thermally affec...
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WO/2023/018028A2 |
Disclosed in the present specification are steel and a steel wire, which are for a spring, and manufacturing methods therefor, the steel and the steel wire having excellent resistance to permanent deformation by having increased in-mater...
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WO/2023/015131A1 |
A method is provided for determining whether post-weld heat treatments should be required for external attachment welds in applications where stress corrosion cracking is a possibility. According to the method, residual stress values are...
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WO/2023/012881A1 |
The present invention addresses the problem of imparting a stainless steel sheet having good corrosion resistance with magnetic properties sufficient to enable said sheet to be held or swung by magnetic forces. To this end, a stainless s...
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WO/2023/013372A1 |
Provided is a high-strength steel sheet including a plate thickness center section and a surface layer soft section formed on one or both sides of the plate thickness center section, wherein: the plate thickness center section has a pres...
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WO/2023/013174A1 |
This steel wire for a spring is provided with a steel main body that has a linear shape, and an oxide layer that covers the outer peripheral surface of the main body. The steel constituting the main body contains 0.6-0.7 mass% C, 1.7-2.5...
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WO/2023/013956A1 |
An aluminum alloy extruded material and an electronic device housing comprising same are disclosed. According to various embodiments, the aluminum alloy extrusion material comprises aluminum, zinc, magnesium, and copper, and the amounts ...
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WO/2023/008002A1 |
Provided is a steel sheet which has high strength and excellent delayed fracture resistance. Also provided is a method for producing this steel sheet.　The steel sheet includes, in terms of mass%, C: 0.15% to 0.45%; Si: 1.5% or less; Mn...
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WO/2023/007833A1 |
Provided is a galvanized steel sheet that has a tensile strength of at least 590 MPa and less than 980 MPa, has excellent ductility, hole expandability, and local ductility, has excellent work-hardening properties, and has excellent dime...
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WO/2023/007876A1 |
This hot-rolled steel sheet has a prescribed chemical composition and metallographic structure, Pi/Ps is 1.2-2.0 in a region in which a sheet-thickness cross section parallel to the rolling direction is divided into three portions in the...
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WO/2023/006732A1 |
Steel sheet in hot rolled condition wherein the steel has a composition in millipercent or where so indicated in ppm: C: 1-50 ppm; Mn: max. 200; Si: max. 100; Al: 10-200; Ti: 46-100; Nb: max. 100; V: max. 100; P: max. 20; S: max. 20; N: ...
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WO/2023/008516A1 |
This steel sheet has a prescribed chemical composition and a tensile strength of at least 780 MPa and exhibits a ferrite area ratio of at least 5%, a ferrite + bainite total area ratio of 10-90%, a martensite + tempered martensite total ...
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WO/2023/007932A1 |
Provided is a quenching device which is excellent in metal sheet cooling effect, allows easy switching between a condition for carrying out quenching and a condition for not carrying out quenching, and is capable of suppressing thermal d...
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WO/2023/008413A1 |
The purpose of the present invention is to provide a hot work tool steel having excellent high-temperature strength and toughness The present invention provides a hot work tool steel comprising, in mass%: 0.20% to 0.60% of C; 0.10% or mo...
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WO/2023/006442A1 |
The present invention relates to a tubular stabilizer bar (1) for a vehicle chassis, produced from a metal tubular body, the tubular stabilizer bar comprising: - a torsion spring portion (2); - two legs (3, 3') bent from the torsion spri...
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WO/2023/008003A1 |
Provided are a steel sheet having high strength and excellent delayed fracture resistance, and a method for producing the same.　The steel sheet contains, in terms of mass%, 0.15-0.45% C, no more than 1.5% Si, more than 1.7% Mn, no more...
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WO/2023/001829A1 |
The invention relates to a component with a part (1) which is made of steel, said part being at least partly coated with a nickel diffusion layer (10), and the layer thickness of the nickel diffusion layer (10) equals 1 – 500 µm. The ...
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WO/2023/001869A1 |
The invention relates to a component with a part (1) which is made of low-alloy steel and/or heat-treatable steel. The part (1) is at least partly coated with an aluminum diffusion layer (10), and an aluminum oxide layer (14) is applied ...
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WO/2023/000520A1 |
The present invention relates to a low-consumption high-efficiency silicon steel normalizing acid pickling process and an acid pickling apparatus. Residual heat at an outlet of a normalizing furnace is effectively used as a medium for he...
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WO/2023/002741A1 |
Provided are a metal sheet-quenching apparatus, a continuous annealing facility, a metal sheet-quenching method, a cold-rolled steel sheet production method, and a plated steel sheet production method that prevent shape defects generated...
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WO/2023/002910A1 |
This cold-rolled steel sheet has a prescribed chemical composition, and when a range from 1/8 to 3/8 of the sheet thickness in a sheet thickness direction from a surface is defined as a t/4 section, and a range of 20 µm from the surface...
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WO/2023/001835A1 |
The invention relates to a high strength cold rolled steel strip or sheet having a steel composition comprising (in wt. %) 0.15 – 0.25 C, 0.3 – 0.5 Si, 2.0 – 3.0 Mn, 0.5-1.0 Al, 0.005 – 0.5 Cr, a thermal stability θ > 0, where Î...
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WO/2023/001382A1 |
The invention relates to a component of a rolling bearing, in particular a rolling track element with a rolling track, on which rolling elements of a rolling bearing are provided for rolling, and/or a rolling element of a rolling bearing...
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WO/2023/284187A1 |
Provided in the present invention is a method for laser strengthening and toughening treatment of a steel rail welding joint, relating to the field of railway steel rail maintenance. The method is: using an area with a lower hardness tha...
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WO/2023/286501A1 |
The purpose of the present invention is to provide a method for producing a hot-dip galvanized steel sheet which makes it possible to achieve high plating adhesion and a good plating appearance even when hot-dip galvanization is performe...
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WO/2023/286440A1 |
Provided is a continuous annealing apparatus capable of manufacturing a steel sheet having excellent hydrogen embrittlement resistance characteristics. This continuous annealing apparatus (100) has: a pay-off reel (10) for feeding a cold...
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WO/2023/284393A1 |
The present invention relates to an automobile wheel steel which has high strength and toughness, and which is characterized in that the components thereof comprise, according to mass percentage: 0.1% to 0.25% C, 1.5% to 2.5% Mn, 0.8% to...
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WO/2023/285747A1 |
The invention relates to a cooling chamber (2) for cooling a metal strip (1) running vertically in a continuous treatment line, said chamber comprising an upper cooling zone (3) in which a cooling liquid is sprayed onto the strip, and an...
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WO/2023/286441A1 |
To provide a steel sheet dehydrogenation device, a system for manufacturing a steel sheet, and a method for manufacturing a steel sheet, whereby it is possible to manufacture a steel sheet having exceptional hydrogen embrittlement resist...
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WO/2023/286771A1 |
Provided is a vehicle wheel bearing device that makes it possible to stabilize the orientation of a vehicle when turning by suppressing deformation of the raceway surface of an outer member. The vehicle wheel bearing device comprises: an...
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WO/2023/284905A1 |
A multi-zone heating process for sheet-steel blanks (2) comprising the following steps: 1.1. A sheet-steel blank (2) is heated to a temperature above the Ac3 temperature of the steel material of the sheet-steel blank (2) for austenitizin...
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WO/2023/281808A1 |
This hot-rolled steel sheet has a specific chemical composition and a metal structure that comprises less than 3.00% by area of residual austenite; and this hot-rolled steel sheet has a tensile strength of 980 MPa or more and an Rcf valu...
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WO/2023/283467A1 |
In some embodiments, a coating applied to steel reinforcement bar (e.g., steel rebar) that could considerably extend the lifetime of concrete structures by reducing steel rebar corrosion is disclosed. The coating includes a thin, passiva...
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