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公开(公告)号：EP4242358A1
公开(公告)日：2023-09-13
申请号：EP21889287.5
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , TAKASHIMA, Katsutoshi , AOYAMA, Mai , OKUMURA, Yusuke , KANAZAWA, Tomomi , HOSHINO, Katsuya , MATSUDA, Hiroshi , OKUMURA, Ei , MAKIMIZU, Yoichi , KOBA, Masaki
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/m 2 , 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：EP4242359A1
公开(公告)日：2023-09-13
申请号：EP21889288.3
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , TAKASHIMA, Katsutoshi , OKUMURA, Yusuke , KANAZAWA, Tomomi , HOSHINO, Katsuya , KAWANO, Takashi , YAMASHITA, Takako , MATSUDA, Hiroshi , MAKIMIZU, Yoichi
IPC分类号： C25D5/26 , C25D5/50 , C22C38/00 , C22C38/02 , C22C38/60 , B23K11/00 , B23K11/11 , B23K11/16 , C23C2/02
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/m 2 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, I Si,Fe /I Si,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：EP4242342A1
公开(公告)日：2023-09-13
申请号：EP21889289.1
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , TAKASHIMA, Katsutoshi , OKUMURA, Yusuke , KANAZAWA, Tomomi , HOSHINO, Katsuya , KAWANO, Takashi , YAMASHITA, Takako , MATSUDA, Hiroshi , MAKIMIZU, Yoichi
IPC分类号： C23C2/28 , C21D9/46 , C22C18/00 , C22C38/00 , C22C38/02 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/26 , C23C2/40 , C23C28/00
摘要： To provide a galvannealed steel sheet with excellent resistance to cracking in resistance welding at a welded portion. 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, I Si,Fe /I Si,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：EP2752503A1
公开(公告)日：2014-07-09
申请号：EP12826944.6
申请日：2012-08-29
发明人： FUJIBAYASHI, Nobue , SASHI, Kazumichi , OKUMURA, Yusuke , OSHIMA, Yasuhide , KUBOTA, Takahiro , NAGOSHI, Masayasu
CPC分类号： H01F41/00 , C09D1/00 , C09D5/08 , C09D5/4476 , C23C18/122 , C23C18/1241 , C23C18/127 , C23C22/74 , C23C2222/20 , H01F1/18 , Y10T428/259 , Y10T428/31663
摘要： An electrical steel sheet with an insulation coating excellent in punchability, coating adhesion property and coating film property after annealing, even without containing any chromium compound in the insulation coating. The insulation coating is formed by applying a surface-treatment agent to at least one side of the electrical steel sheet and drying the surface-treatment agent. The surface-treatment agent contains trialkoxysilane and/or dialkoxysilane (A) in which a substituent bound to Si is constituted only by at least one non-reactive substituent selected from the group consisting of hydrogen, an alkyl group, and a phenyl group; and a silane coupling agent (B), at a mass ratio (A/B) of 0.05 to 1.0.
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公开(公告)号：EP4242356A1
公开(公告)日：2023-09-13
申请号：EP21889285.9
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , TAKASHIMA, Katsutoshi , AOYAMA, Mai , OKUMURA, Yusuke , KANAZAWA, Tomomi , HOSHINO, Katsuya , MATSUDA, Hiroshi , OKUMURA, Ei , MAKIMIZU, Yoichi , KOBA, Masaki
IPC分类号： C25D5/26 , C21D9/46 , C22C18/00 , C22C38/00 , C22C38/02 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/26 , C23C2/28 , C23C2/40 , C23C28/00
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/m 2 , 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：EP4242355A1
公开(公告)日：2023-09-13
申请号：EP21889284.2
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , TAKASHIMA, Katsutoshi , AOYAMA, Mai , OKUMURA, Yusuke , KANAZAWA, Tomomi , HOSHINO, Katsuya , MATSUDA, Hiroshi , OKUMURA, Ei , MAKIMIZU, Yoichi , KOBA, Masaki
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/m 2 , 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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7.发明授权ELECTROMAGNETIC STEEL SHEET HAVING INSULATING COATING 有权ELEKTROMAGNETISCHES STAHLBLECH MIT ISOLIERENDER BESCHICHTUNG
公开(公告)号：EP2752503B1
公开(公告)日：2017-03-22
申请号：EP12826944.6
申请日：2012-08-29
发明人： FUJIBAYASHI, Nobue , SASHI, Kazumichi , OKUMURA, Yusuke , OSHIMA, Yasuhide , KUBOTA, Takahiro , NAGOSHI, Masayasu
CPC分类号： H01F41/00 , C09D1/00 , C09D5/08 , C09D5/4476 , C23C18/122 , C23C18/1241 , C23C18/127 , C23C22/74 , C23C2222/20 , H01F1/18 , Y10T428/259 , Y10T428/31663
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8.发明公开
公开(公告)号：EP4317516A1
公开(公告)日：2024-02-07
申请号：EP22804683.5
申请日：2022-05-17
发明人： MAKIMIZU, Yoichi , YAMAMOTO, Shunsuke , OKUMURA, Yusuke , HOSHINO, Katsuya , OKUMURA, Ei , TAKASHIMA, Katsutoshi
IPC分类号： C23C2/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/60 , C23C2/06 , C23C2/40 , C23C28/00 , C25D5/26
摘要： A base steel sheet containing Si in an amount of 0.50 to 3.00 mass% is subjected to an Fe-based electroplating treatment using an Fe-based electroplating solution containing Fe ions and transition metal ions other than the Fe ions to form an Fe-based electroplated layer, and then to an annealing treatment. In the Fe-based electroplating solution, a content of the Fe ions is 1.0 mass% or more and a content of the transition metal ions is 10 to 1000 mass ppm. A coating amount of the Fe-based electroplated layer per one surface of the base steel sheet is 1.0 g/m 2 or more. Thus, a steel sheet having high strength and excellent resistance to resistance-weld cracking of a welded portion is obtained.
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9.发明公开
公开(公告)号：EP4242340A1
公开(公告)日：2023-09-13
申请号：EP21889290.9
申请日：2021-11-05
发明人： YAMAMOTO, Shunsuke , OKUMURA, Yusuke , TAKASHIMA, Katsutoshi , AOYAMA, Mai , KANAZAWA, Tomomi , HOSHINO, Katsuya , MAKIMIZU, Yoichi , KAWANO, Takashi , YAMASHITA, Takako , MATSUDA, Hiroshi
IPC分类号： C23C2/02 , C22C38/00 , C22C38/06 , C22C38/60 , C23C2/06 , C23C2/40 , C23C28/02 , C25D5/26 , C25D5/50
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/m 2 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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