发明名称 |
METHOD FOR WELDING OVERLAPPED PART, METHOD FOR MANUFACTURING LAP WELD MEMBER, LAP WELD MEMBER, AND COMPONENT FOR AUTOMOBILE |
摘要 |
A method of welding an overlapped portion according to the present invention in which a plurality of steel sheet members are joined at an overlapped portion, and at least one of the plurality of steel sheet members contains martensite, includes: forming a spot-welded portion having a nugget in the overlapped potion; and emitting a laser beam to form a melted and solidified portion crossing an end of the nugget and located between the nugget and a position externally spaced apart from an end of the nugget by not less than 3 mm, this melted and solidified portion being formed in the steel sheet member containing the martensite so as to have a depth of not less than 50% of the thickness of the steel sheet member containing the martensite at a position externally spaced apart from the end of the nugget by 1 mm. |
申请公布号 |
KR20150023898(A) |
申请公布日期 |
2015.03.05 |
申请号 |
KR20157002212 |
申请日期 |
2013.08.08 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
FUJIMOTO HIROKI;OKADA TOHRU;YASUYAMA MASANORI |
分类号 |
B23K11/11;B23K11/16;B23K26/00 |
主分类号 |
B23K11/11 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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