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公开(公告)号：US20230407484A1
公开(公告)日：2023-12-21
申请号：US18251242
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： C23C28/02 , C23C2/28 , C23C2/06 , C22C38/02 , C25D3/20 , C23C2/02 , C22C38/06 , C22C38/04 , C21D8/02
CPC分类号： C23C28/021 , C23C2/28 , C23C2/06 , C22C38/02 , C25D3/20 , C23C2/022 , C22C38/06 , C22C38/04 , C21D8/0236
摘要： Disclosed is a galvannealed 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; and a galvannealed 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 0.30 or more, and an average value of C concentration in a region ranging from 10 μm to 20 μm in the thickness direction from the interface between the galvannealed 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：US20240117517A1
公开(公告)日：2024-04-11
申请号：US18250978
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
CPC分类号： C25D3/20 , C21D8/0236 , C21D8/0257 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C25D7/0614
摘要： Disclosed is an Fe-based electroplated 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; and 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, in which in an intensity profile measured by glow discharge optical emission spectrometry, a peak of emission intensity at wavelengths indicating Si is detected within a range from a surface of the Fe-based electroplating layer to more than 0.2 μm in a thickness direction and not more than a thickness of the Fe-based electroplating layer, and an average value of C concentration in a region ranging from 10 μm to 20 μm in the thickness direction from the surface of the Fe-based electroplating layer is 0.10 mass % or less.
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公开(公告)号：US20230407485A1
公开(公告)日：2023-12-21
申请号：US18251269
申请日：2021-11-05
发明人： Shunsuke YAMAMOTO , Katsutoshi TAKASHIMA , Mai AOYAMA , Yusuke OKUMURA , Tomomi KANAZAWA , Katsuya HOSHINO , Hiroshi MATSUDA , Ei OKUMURA , Yoichi MAKIMIZU , Masaki KOBA
IPC分类号： C23C28/02 , C21D9/46 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D6/00 , C22C33/04 , C21D8/02 , C21D1/74 , C25D3/20 , C25D5/36
CPC分类号： C23C28/021 , C21D9/46 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/002 , C22C38/001 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C22C33/04 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D1/74 , C21D8/0278 , C25D3/20 , C25D5/36 , C21D2251/02 , C23C2/28
摘要： Provided is an alloyed galvanized steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if crystal orientations of an Fe-based electroplating layer and a cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the cold-rolled steel sheet. The alloyed galvanized steel sheet has a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % to 3.0 mass %; 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 exceeding 20.0 g/m2, and an alloyed galvanized layer formed on the Fe-based electroplating layer, where crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50% at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
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公开(公告)号：US20240124964A1
公开(公告)日：2024-04-18
申请号：US18546428
申请日：2022-03-18
CPC分类号： C23C2/06 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C23C2/40 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： Provided is a galvanized steel sheet having a TS of 980 MPa or more, high YS, excellent ductility, strain hardenability, and hole expansion formability. A base steel sheet has a defined chemical composition and a steel microstructure as follows: area ratio of ferrite: 65.0% or less (including 0%), area ratio of bainitic ferrite: 5.0% or more and 40.0% or less, area ratio of tempered martensite: 0.5% or more and 80.0% or less, area ratio of retained austenite: 3.0% or more, area ratio of fresh martensite: 20.0% or less (including 0%), SBF+STM+2×SMA: 65.0% or more, SMA1/SMA: 0.80 or less, and SMA2/SMA: 0.20 or more.
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公开(公告)号：US20230407447A1
公开(公告)日：2023-12-21
申请号：US18251422
申请日：2021-11-05
发明人： Shunsuke YAMAMOTO , Katsutoshi TAKASHIMA , Mai AOYAMA , Yusuke OKUMURA , Tomomi KANAZAWA , Katsuya HOSHINO , Hiroshi MATSUDA , Ei OKUMURA , Yoichi MAKIMIZU , Masaki KOBA
IPC分类号： C23C2/02 , C22C33/04 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/38 , C22C38/32 , C22C38/28 , C21D9/46 , C21D8/02 , C21D6/00 , C22C38/00 , C21D1/74 , C25D5/36 , C25D5/48 , C25D3/56 , C23C2/28 , C23C2/40 , C23F17/00 , C23C28/00
CPC分类号： C23C2/02 , C22C33/04 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/38 , C22C38/32 , C22C38/28 , C21D9/46 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D6/002 , C21D6/005 , C21D6/008 , C22C38/002 , C22C38/001 , C21D1/74 , C25D5/36 , C25D5/48 , C25D3/562 , C23C2/28 , C23C2/40 , C23F17/00 , C23C28/34 , C23C28/321 , C21D2251/02 , B23K11/166
摘要： Provided is a galvanized steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if crystal orientations of an Fe-based electroplating layer and a cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the cold-rolled steel sheet. The galvanized steel sheet has a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % to 3.0 mass %; 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 more than 20.0 g/m2, and a galvanized layer formed on the Fe-based electroplating layer, where crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50 % at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
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公开(公告)号：US20240318287A1
公开(公告)日：2024-09-26
申请号：US18579575
申请日：2022-03-18
发明人： Sho HIGUCHI , Yoshiyasu KAWASAKI , Tatsuya NAKAGAITO , Takako YAMASHITA , Tomomi KANAZAWA , Shunsuke YAMAMOTO
CPC分类号： C22C38/04 , C21D6/005 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C22C38/02 , C22C38/06 , C23C2/06 , C23C2/29 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A galvanized steel sheet combining high strength with excellent formability, specifically, excellent ductility, hole expansion formability, local ductility, strain hardenability, and dimensional accuracy when forming a member. The base steel sheet has a defined chemical composition and a steel microstructure as follows: ferrite area ratio: 35.0% or more and 95.0% or less, bainitic ferrite area ratio: 1.0% or more and 40.0% or less, tempered martensite area ratio: 50.0% or less (including 0%), retained austenite area ratio: 1.5% or more, fresh martensite area ratio: 20.0% or less (including 0 %), SBF+STM+2×SMA: 10.0% or more and less than 65.0%, SBF+STM: 3.0 % or more and 60.0% or less, SMA1/SMA: 0.40 or less, IDR [% Cγ]: 0.16% or more, and tensile strength: 590 MPa or more and less than 980 MPa.
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7.发明公开公开(公告)号：US20240009962A1
公开(公告)日：2024-01-11
申请号：US18251244
申请日：2021-11-05
发明人： Shunsuke YAMAMOTO , Yusuke OKUMURA , Katsutoshi TAKASHIMA , Mai AOYAMA , Tomomi KANAZAWA , Katsuya HOSHINO , Yoichi MAKIMIZU , Takashi KAWANO , Takako YAMASHITA , Hiroshi MATSUDA
IPC分类号： B32B15/01 , C22C38/02 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/00 , C21D9/46 , C22C33/04 , C21D8/02 , C21D6/00 , C22C38/32 , C22C38/28 , C22C38/38 , C25D3/20 , C25D5/50 , C23F17/00 , C23C2/02 , C23C2/28 , C23C2/06
CPC分类号： B32B15/011 , C22C38/02 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/002 , C22C38/001 , C21D9/46 , C22C33/04 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D6/001 , C21D6/005 , C21D6/008 , C22C38/32 , C22C38/28 , C22C38/38 , C21D6/002 , C25D3/20 , C25D5/50 , B32B15/01 , C23F17/00 , C23C2/02 , C23C2/28 , C23C2/06
摘要： To provide an Fe-based electroplated steel sheet that not only has excellent chemical convertibility or excellent coating appearance when subjected to hot-dip galvanizing, but also has excellent resistance to cracking in resistance welding. Disclosed is an Fe-based plated steel sheet including: a cold-rolled steel sheet having a chemical composition containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and an Fe-based electroplating layer formed on one or both surfaces of the cold-rolled steel sheet with a coating weight per surface of 1.0 g/m2 or more, in which a thickness of an internal oxidation layer is 2.00 μm or less, and an average value of C concentration in a range of 10 μm to 20 μm in a thickness direction from the surface of the Fe-based electroplating layer is 0.10 mass % or less.
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公开(公告)号：US20230407506A1
公开(公告)日：2023-12-21
申请号：US18251396
申请日：2021-11-05
发明人： Shunsuke YAMAMOTO , Katsutoshi TAKASHIMA , Mai AOYAMA , Yusuke OKUMURA , Tomomi KANAZAWA , Katsuya HOSHINO , Hiroshi MATSUDA , Ei OKUMURA , Yoichi MAKIMIZU , Masaki KOBA
IPC分类号： C25D3/20 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/04 , C21D8/02 , C23C22/78 , C25D5/36 , C23C28/02
CPC分类号： C25D3/20 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/04 , C21D8/0236 , C21D8/0273 , C23C22/78 , C25D5/36 , C23C28/02 , C21D2201/05
摘要： Provided is a steel sheet with excellent resistance to cracking in resistance welding at a welded portion, even if the crystal orientations of an Fe-based electroplating layer and a Si-containing cold-rolled steel sheet are integrated at a high ratio at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet. Provided is an Fe-based electroplated steel sheet having a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and 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 more than 20.0 g/m2, where the crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50% at the interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.
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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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