Welding structural part and welding method of the same
US9498840B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2010 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Dec 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12965
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding structural part 1 is manufactured by overlapping the surfaces of steel sheets 2, and forming a weld zone by spot welding. The weld zone 3 includes: a weld nugget 4; and a heat affected zone 5 surrounding the weld nugget 4, wherein the hardness in the weld zone increases along an exterior region 6 of the heat affected zone 5 toward the heat affected zone 5, and then decreases along the heat affected zone 5 toward the central region of the weld nugget 4. In the boundary region between the weld nugget 4 and the heat affected zone 5, the weld nugget 4 may have a convex portion 4A bulging into the heat affected zone 5 along the overlapped portion. The steel sheets 2 contain carbon in 0.15 mass % or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.