Method of welding overlapped portion, method of manufacturing overlap-welded member, overlap-welded member, and automotive part
US10549388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2013 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Mar 18, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12347
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
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 portion; 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.