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公开(公告)号：US20230407443A1
公开(公告)日：2023-12-21
申请号：US18037473
申请日：2021-10-29
申请人： POSCO Co., Ltd
发明人： Kyung-hun Kim , Hak Kim , Manjin Ha , Jisoo Kim
IPC分类号： C22C38/44 , C22C38/42 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/50 , C22C38/54 , C21D8/02 , C21D9/46
CPC分类号： C22C38/44 , C22C38/42 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/002 , C22C38/06 , C22C38/50 , C22C38/54 , C21D8/0226 , C21D8/0273 , C21D9/46 , C21D2211/001
摘要： Disclosed is a high-strength austenitic stainless steel having excellent hot workability. The high-strength austenitic stainless steel having excellent hot workability according to the present disclosure includes, in percent by weight (wt %), 0.01 to 0.035% of C, 0.5% or less of Si, 0.5 to 1.5% of Mn, 17 to 22% of Cr, 6 to 11% of Ni, 1% or less of Mo, 1% or less of Cu, 0.1 to 0.22% of N, and the balance of Fe and inevitable impurities, wherein a value of Formula (1) below 1.9 or more, or a precipitation temperature of chromium nitride satisfies a value represented by Formula (2) below or less.
3×(Cr+Mo)+5×Si−2×Ni−Mn−70×(C+N)−27 (1)
1180+36×C+12×Mo+17×Cu+411×N−35×Mn (2)-
公开(公告)号：US20230407428A1
公开(公告)日：2023-12-21
申请号：US18036253
申请日：2022-01-19
发明人： Shinichiro TABATA , Kazuhisa KUSUMI , Yuki SUZUKI
IPC分类号： C21D9/46 , C22C38/60 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/38 , C22C38/34 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C33/04 , C21D8/02 , C21D6/00 , C21D1/18 , B32B15/01 , C23C2/06 , C23C2/12 , C23C2/40
CPC分类号： C21D9/46 , C22C38/60 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/38 , C22C38/34 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/008 , C22C38/005 , C22C38/002 , C22C38/001 , C22C33/04 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D1/18 , B32B15/013 , C23C2/06 , C23C2/12 , C23C2/40 , C21D2261/00 , C21D2211/008
摘要： This steel has a steel sheet substrate and a protective film formed on at least a part of a surface of the steel sheet substrate, the chemical composition of the steel sheet substrate is, by mass %, C: 0.25% to 0.65%, Si: 0.05% to 2.00%, Mn: 0.30% to 3.00%, P: 0.050% or less, S: 0.0100% or less. N: 0.010% or less, O: 0.010% or less, Cr: 0.05% to 1.00%, and Cu: 0.10% to 1.00%, in an X-ray analysis in which measurement is carried out using a CuKα radiation, in a case where a peak intensity at a diffraction angle (2θ) position of 36.6±0.5° is regarded as 100%, the protective film has a peak having a peak intensity of more than 250% at a diffraction angle (2θ) position of 35.5±0.5° and a tensile strength is more than 1,500 MPa.
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公开(公告)号：US20230399727A1
公开(公告)日：2023-12-14
申请号：US18271138
申请日：2022-03-14
IPC分类号： C22C38/38 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/02 , C21D6/00 , C21D1/84 , C23C2/06 , C23C2/40
CPC分类号： C22C38/38 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/005 , C22C38/002 , C22C38/001 , C21D9/46 , C21D8/0278 , C21D8/0263 , C21D8/0226 , C21D8/0236 , C21D8/0205 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D1/84 , C23C2/06 , C23C2/40
摘要： High strength steel sheet and plated steel sheet having high plateability, LME resistance, and hydrogen embrittlement resistance, that is, steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50%, having an internal oxidation layer including fine granular oxides, coarse granular oxides, and grain boundary oxides in a surface layer of the steel sheet, a number density of fine granular oxides in the internal oxidation layer being 4.0/μm2 or more, a number density of coarse granular oxides in the internal oxidation layer being 4.0/25 μm2 or more, having a Ratio A of the length of the grain boundary oxides projected on the surface of the steel sheet to the length of the surface of the steel sheet when examining a cross-section of the surface layer of the steel sheet being 50% or more and 100% or less, and including a surface depleted layer with a steel composition not including oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% at a depth of ½ of the average depth of the internal oxidation layer calculated from the cross-sectional SEM image of the steel sheet, and a plated steel sheet using the same.
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公开(公告)号：US20230383392A1
公开(公告)日：2023-11-30
申请号：US18250774
申请日：2021-12-24
IPC分类号： C23C2/06 , C22C18/04 , C22C38/02 , C22C38/04 , C21D9/46 , C21D8/02 , C21D6/00 , C21D1/74 , C23C2/40 , B32B15/01
CPC分类号： C23C2/06 , C22C18/04 , C22C38/02 , C22C38/04 , C21D9/46 , C21D8/0205 , B32B15/013 , C21D8/0278 , C21D6/005 , C21D6/008 , C21D1/74 , C23C2/40 , C21D8/0236
摘要： A plated steel sheet for automobile structural members has a steel sheet, a plating layer formed on at least a part of a surface of the steel sheet, and an oxide layer formed on at least a part of a surface of the plating layer, the plating layer has a predetermined chemical composition, and when measurement by XPS is performed at a position 5.0 nm below a surface of the oxide layer in a thickness direction. IMg/IMgOx, which is the ratio of a maximum detected intensity of Mg to a maximum detected intensity of an oxide or hydroxide of Mg, is 0.00 or greater and 1.20 or less.
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95.发明授权公开(公告)号：US11827996B2
公开(公告)日：2023-11-28
申请号：US17044678
申请日：2019-04-12
IPC分类号： C25D5/50 , C21D9/46 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C25D3/12 , C25D7/00 , H01M50/145
CPC分类号： C25D5/50 , B32B15/015 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C25D3/12 , C25D7/00 , H01M50/145
摘要： A Ni diffusion-plated steel sheet of the present invention includes a base steel sheet and a Fe—Ni diffusion alloy-plating layer positioned on at least one surface of the base steel sheet, a Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 35 g/m2, a Fe concentration Cs of an outermost layer of the Fe—Ni diffusion alloy-plating layer is 10 to 55 mass %, the base steel sheet has a predetermined chemical composition, and a ferrite grain size number specified by JIS G 0551 (2013) of the base steel sheet is 10.0 or more.
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公开(公告)号：US20230374639A1
公开(公告)日：2023-11-23
申请号：US18250979
申请日：2021-11-05
发明人： Shunsuke YAMAMOTO , Katsutoshi TAKASHIMA , Yusuke OKUMURA , Tomomi KANAZAWA , Katsuya HOSHINO , Takashi KAWANO , Takako YAMASHITA , Hiroshi MATSUDA , Yoichi MAKIMIZU
IPC分类号： C23C2/40 , C21D8/02 , C21D9/46 , C23C2/06 , C22C38/02 , C22C38/00 , C22C38/04 , C22C38/06 , C25D3/20 , C25D5/36 , C25D5/50 , C25D7/06 , C23C28/02
CPC分类号： C23C2/40 , C21D8/0236 , C21D9/46 , C23C2/06 , C22C38/02 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C25D3/20 , C25D5/36 , C25D5/50 , C25D7/0614 , C23C28/021
摘要： To provide a steel sheet with excellent resistance to cracking in resistance welding at a welded portion. Disclosed is a galvanized steel sheet including: a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface of 5.0 g/m2 or more; and a galvanized layer formed on the Fe-based electroplating layer, in which in an intensity profile measured by glow discharge optical emission spectrometry, ISi,Fe/ISi,bulk is 0.50 or more, and an average value of C concentration in a region ranging from 10 μm to 20 μm from an interface between the galvanized layer and the Fe-based electroplating layer towards the Fe-based electroplating layer is 0.10 mass % or less.
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公开(公告)号：US20230357900A1
公开(公告)日：2023-11-09
申请号：US18246042
申请日：2021-09-22
IPC分类号： C22C21/02 , H01M50/224 , C21D8/02 , C21D9/46
CPC分类号： C22C21/02 , H01M50/224 , C21D8/0226 , C21D8/0236 , C21D8/0278 , C21D9/46 , H01M2220/20
摘要： The invention relates to battery trays for electric or hybrid vehicles. The bottoms of the battery trays are made of a thin sheet of aluminum alloy having a modulus of elasticity higher than 77 GPa in order to optimize thickness thereof while ensuring resistance to intrusion. The invention also relates to a thin sheet of 4xxx series aluminum alloy whose modulus is higher than 77 GPa and whose yield strength Rp 0.2 is higher than 295 MPa.
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98.发明公开公开(公告)号：US20230357883A1
公开(公告)日：2023-11-09
申请号：US18004880
申请日：2021-05-07
发明人： Yuki TOJI , Kazuki ENDOH , Hidekazu MINAMI
IPC分类号： C21D10/00 , C21D9/46 , C21D8/02 , C21D6/00 , C22C38/60 , C22C38/40 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/20 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
CPC分类号： C21D10/00 , C21D9/46 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C22C38/60 , C22C38/40 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/20 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/008 , C22C38/005 , C22C38/002 , C22C38/001 , C23C2/40
摘要： Provided are a steel sheet dehydrogenation apparatus, a steel sheet production system, and a steel sheet production method capable of producing a steel sheet excellent in hydrogen embrittlement resistance without changing the mechanical properties of the steel sheet. A dehydrogenation apparatus comprises: a housing configured to house a steel sheet coil obtained by coiling a steel strip; and a sound wave irradiator configured to irradiate the steel sheet coil housed in the housing with sound waves to obtain a product coil.
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公开(公告)号：US20230349017A1
公开(公告)日：2023-11-02
申请号：US17907897
申请日：2021-03-08
发明人： Mutsumi SAKAKIBARA , Hiroshi SHUTO , Hiroshi TANEI , Takaaki TSUTSUMI , Shota ISHITSUKA , Shinsuke KAI , Akifumi SAKAKIBARA
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
CPC分类号： C21D8/0226 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/005 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , C21D2211/002 , C21D2211/008 , C21D2211/001 , C21D2211/005 , C21D2211/009
摘要： This hot-rolled steel sheet has a predetermined chemical composition, the number % of crystal grains of bainite that are in contact with both tempered martensite and residual austenite is 80% or more of all crystal grains of the bainite, a C concentration in the residual austenite is 0.80 mass % or more, an average crystal grain size of the residual austenite is 0.70 μm or less, and a standard deviation of Vickers hardness is 25 HV0.01 or less.
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100.发明公开公开(公告)号：US20230347444A1
公开(公告)日：2023-11-02
申请号：US18206979
申请日：2023-06-07
发明人： Chang Wook Lee , Yeon Jung Hwang
CPC分类号： B23K26/21 , B21D22/022 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/46 , C22C38/002 , C22C38/02 , C22C38/32 , C22C38/38 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A hot-stamped article and a method of manufacturing same use a tailor welded blank (TWB) method capable of controlling the microstructure of a weld portion to prevent fracture of the weld portion. The method includes: preparing a first sheet and a second sheet having different upper austenite transformation temperatures (A3 temperatures); welding the first sheet and the second sheet using a TWB method to prepare a welded sheet obtained as a result of the first sheet and the second sheet being welded to each other via a weld portion; and hot-stamping the welded sheet heated within a temperature range between an A3 temperature of the first sheet and an A3 temperature of the second sheet.
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