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公开(公告)号：US11377702B2
公开(公告)日：2022-07-05
申请号：US17256002
申请日：2019-04-22
摘要： A ferritic stainless steel sheet comprises: a predetermined chemical composition, wherein a difference between a maximum value and a minimum value of Vickers hardness in a thickness direction is HV 50 or less.
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公开(公告)号：US11220732B2
公开(公告)日：2022-01-11
申请号：US16310956
申请日：2017-06-15
IPC分类号： C22C38/42 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60
摘要： Provided is a ferritic stainless steel sheet excellent in shape of weld zone and corrosion resistance of a weld zone with a material of a different kind formed by performing welding with austenitic stainless steel.
A ferritic stainless steel sheet having a chemical composition containing, by mass %, C: 0.003% to 0.020%, Si: 0.01% to 1.00%, Mn: 0.01% to 0.50%, P: 0.040% or less, S: 0.010% or less, Cr: 20.0% to 24.0%, Cu: 0.20% to 0.80%, Ni: 0.01% to 0.60%, Al: 0.01% to 0.08%, N: 0.003% to 0.020%, Nb: 0.40% to 0.80%, Ti: 0.01% to 0.10%, Zr: 0.01% to 0.10%, and the balance being Fe and inevitable impurities, in which relational expression (1) below is satisfied: 3.0≥Nb/(2Ti+Zr+0.5Si+5Al)≥1.5 (1), here, in relational expression (1), each of the atomic symbols denotes the content (mass %) of the corresponding chemical element.-
3.发明申请HIGH-STRENGTH GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME (AS AMENDED) 审中-公开高强度钢化钢板及其制造方法（如修改）公开(公告)号：US20160047011A1
公开(公告)日：2016-02-18
申请号：US14779772
申请日：2014-03-26
发明人： Hidetaka Kawabe , Takeshi Yokota
CPC分类号： C21D8/0247 , B32B15/013 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D9/46 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40 , C23F17/00
摘要： A high-strength galvanized steel sheet has a chemical composition containing, by mass %, C: 0.16% or more and 0.24% or less, Si: 0.8% or more and 1.8% or less, Mn: 1.0% or more and 3.0% or less, P: 0.020% or less, S: 0.0040% or less, Al: 0.01% or more and 0.1% or less, N: 0.01% or less, Ca: 0.0001% or more and 0.0020% or less, and the balance including Fe and incidental impurities, and a microstructure, in which the total area ratio of a ferrite phase and a bainite phase with respect to the whole microstructure is 30% or more and 70% or less, in which the area ratio of a tempered martensite phase with respect to the whole microstructure is 20% or more and 40% or less, in which the area ratio of a retained austenite phase with respect to the whole microstructure is 10% or more and 20% or less, and in which the area ratio of a martensite phase with respect to the whole microstructure is 2% or more and 20% or less.
摘要翻译： 高强度镀锌钢板具有以质量％计含有C：0.16％以上且0.24％以下，Si：0.8％以上且1.8％以下，Mn：1.0％以上3.0％以下的化学成分， 以下，P：0.020％以下，S：0.0040％以下，Al：0.01％以上且0.1％以下，N：0.01％以下，Ca：0.0001％以上且0.0020％以下， 余量包括Fe和杂质，以及相对于整个微观结构的铁素体相和贝氏体相的总面积比为30％以上且70％以下的微观结构，其中回火的面积比 相对于整个微观结构，马氏体相为20％以上且40％以下，残留奥氏体相相对于整个微观结构的面积比为10％以上且20％以下，其中 相对于整个微结构，马氏体相的面积比为2％以上且20％以下。
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公开(公告)号：US20200308677A1
公开(公告)日：2020-10-01
申请号：US16310956
申请日：2017-06-15
IPC分类号： C22C38/42 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60 , C21D9/46
摘要： Provided is a ferritic stainless steel sheet excellent in shape of weld zone and corrosion resistance of a weld zone with a material of a different kind formed by performing welding with austenitic stainless steel.A ferritic stainless steel sheet having a chemical composition containing, by mass %, C: 0.003% to 0.020%, Si: 0.01% to 1.00%, Mn: 0.01% to 0.50%, P: 0.040% or less, S: 0.010% or less, Cr: 20.0% to 24.0%, Cu: 0.20% to 0.80%, Ni: 0.01% to 0.60%, Al: 0.01% to 0.08%, N:. 0.003% to 0.020%, Nb: 0.40% to 0.80%, Ti: 0.01% to 0.10%, Zr: 0.01% to 0.10%, and the balance being Fe and inevitable impurities, in which relational expression (1) below is satisfied: 3.0≥Nb/(2Ti+Zr+0.5 Si+5 Al)≥1.5 (1), here, in relational expression (1), each of the atomic symbols denotes the content (mass %) of the corresponding chemical element.
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公开(公告)号：US10260133B2
公开(公告)日：2019-04-16
申请号：US14779783
申请日：2014-03-26
IPC分类号： C22C38/06 , C21D9/46 , C22C38/00 , C21D8/02 , C23C2/06 , C23C2/02 , C23C2/40 , C25D5/36 , C25D7/06 , C21D6/00 , C22C38/02 , C22C38/04 , C25D3/22 , C25D7/00 , C22C38/22
摘要： There is provided a high-strength steel sheet having a tensile strength (TS) of 900 MPa or more and excellent elongation, stretch flangeability, and bendability in a component system in which an expensive alloy element is not intentionally added. A high-strength steel sheet includes a composition including, on a mass % basis, C: 0.15 to 0.40%, Si: 1.0 to 2.0%, Mn: 1.5 to 2.5%, P: 0.020% or less, S: 0.0040% or less, Al: 0.01 to 0.1%, N: 0.01% or less, and Ca: 0.0020% or less, with the balance including Fe and incidental impurities. The high-strength steel sheet has a microstructure including 40% to 70% of a ferrite phase and a bainite phase in total, 20% to 50% of a martensite phase, and 10% to 30% of a retained austenite phase in terms of an area fraction relative to the entire microstructure.
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公开(公告)号：US12123070B2
公开(公告)日：2024-10-22
申请号：US17299308
申请日：2019-11-27
IPC分类号： C21D9/46 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60
CPC分类号： C21D9/46 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60 , C21D2211/005
摘要： A ferritic stainless steel sheet has a predetermined chemical composition and thickness, and has an area ratio of crystal grains of 45 μm or more in grain size of 20% or less.
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7.发明申请公开(公告)号：US20200377980A1
公开(公告)日：2020-12-03
申请号：US16636792
申请日：2018-09-21
IPC分类号： C22C38/60 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , C21D8/02 , C21D9/46 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： Provided is a hot-rolled and annealed ferritic stainless steel sheet excellent in surface quality after bending work has been performed.A hot-rolled and annealed ferritic stainless steel sheet has a thickness of 5.0 mm or more and a chemical composition containing, by mass %, C: 0.001% to 0.025%, Si: 0.05% to 0.70%, Mn: 0.05% to 0.50%, P: 0.050% or less, S: 0.01% or less, Cr: 10.0% to 18.0%, Ni: 0.01% to 1.00%, Al: 0.001% to 0.10%, N: 0.001% to 0.025%, Ti: 0.01% to 0.40%, and a balance of Fe and inevitable impurities, in which a difference between maximum and minimum values of an average crystal grain diameter determined by using measuring method 1 is 50 μm or less, and in which a difference between maximum and minimum values of a crystal grain elongation rate determined by using measuring method 2 is 5.0 or less.
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公开(公告)号：US10266906B2
公开(公告)日：2019-04-23
申请号：US14779772
申请日：2014-03-26
发明人： Hidetaka Kawabe , Takeshi Yokota
IPC分类号： C21D8/02 , C23C2/06 , C23C2/40 , C21D9/46 , C22C38/00 , C22C38/06 , B32B15/01 , C22C38/02 , C22C38/04 , C23C2/02 , C23C2/28 , C21D6/00 , C23F17/00
摘要： A high-strength galvanized steel sheet has a chemical composition containing, by mass %, C: 0.16% or more and 0.24% or less, Si: 0.8% or more and 1.8% or less, Mn: 1.0% or more and 3.0% or less, P: 0.020% or less, S: 0.0040% or less, Al: 0.01% or more and 0.1% or less, N: 0.01% or less, Ca: 0.0001% or more and 0.0020% or less, and the balance including Fe and incidental impurities, and a microstructure, in which the total area ratio of a ferrite phase and a bainite phase with respect to the whole microstructure is 30% or more and 70% or less, in which the area ratio of a tempered martensite phase with respect to the whole microstructure is 20% or more and 40% or less, in which the area ratio of a retained austenite phase with respect to the whole microstructure is 10% or more and 20% or less, and in which the area ratio of a martensite phase with respect to the whole microstructure is 2% or more and 20% or less.
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公开(公告)号：US10072316B2
公开(公告)日：2018-09-11
申请号：US14436685
申请日：2013-10-16
发明人： Hidetaka Kawabe , Takeshi Yokota , Reiko Sugihara , Daigo Itoh , Kazunori Tahara
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0263 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14
摘要： A cold-rolled steel sheet having a steel composition comprising, by mass %, 0.12% to 0.22% C, 0.8% to 1.8% Si, 1.8% to 2.8% Mn, 0.020% or less P, 0.0040% or less S, 0.005% to 0.08% Al, 0.008% or less N, 0.001% to 0.040% Ti, 0.0001% to 0.0020% B, 0.0001% to 0.0020% Ca, and Fe and incidental impurities. The steel sheet includes a microstructure in which ferrite and bainite phases are 50% to 70% of the total area, the average grain size of the ferrite and bainite phase is 1 to 3 μm, a tempered martensite phase is 25% to 45% of the total area, the average grain size of the tempered martensite phase is 1 to 3 μm, and a retained austenite phase is 2% to 10% of the total area.
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10.发明授权公开(公告)号：US11174540B2
公开(公告)日：2021-11-16
申请号：US16636792
申请日：2018-09-21
IPC分类号： C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/50 , C22C38/60 , C21D9/46 , C22C38/00 , C22C38/46 , C22C38/48 , C22C38/54
摘要： Provided is a hot-rolled and annealed ferritic stainless steel sheet excellent in surface quality after bending work has been performed.
A hot-rolled and annealed ferritic stainless steel sheet has a thickness of 5.0 mm or more and a chemical composition containing, by mass %, C: 0.001% to 0.025%, Si: 0.05% to 0.70%, Mn: 0.05% to 0.50%, P: 0.050% or less, S: 0.01% or less, Cr: 10.0% to 18.0%, Ni: 0.01% to 1.00%, Al: 0.001% to 0.10%, N: 0.001% to 0.025%, Ti: 0.01% to 0.40%, and a balance of Fe and inevitable impurities, in which a difference between maximum and minimum values of an average crystal grain diameter determined by using measuring method 1 is 50 μm or less, and in which a difference between maximum and minimum values of a crystal grain elongation rate determined by using measuring method 2 is 5.0 or less.
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