Alloyed galvanized steel sheet, electrodeposition-coated steel sheet, automotive part, method of producing electrodeposition-coated steel sheet, and method of producing alloyed galvanized steel sheet

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United States of America

PATENT NO 12221705
APP PUB NO 20230407485A1
SERIAL NO

18251269

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aoyama, Mai Tokyo, JP 20 40
Hoshino, Katsuya Tokyo, JP 32 28
Kanazawa, Tomomi Tokyo, JP 13 0
Koba, Masaki Tokyo, JP 17 34
Makimizu, Yoichi Tokyo, JP 43 129
Matsuda, Hiroshi Tokyo, JP 474 5592
Okumura, Ei Tokyo, JP 4 0
Okumura, Yusuke Tokyo, JP 27 28
Takashima, Katsutoshi Tokyo, JP 73 236
Yamamoto, Shunsuke Tokyo, JP 61 74

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