Spot welded member
US12037665B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Jul 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B15/013
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A spot welded member includes a spot weld formed by holding a sheet stack of multiple steel sheets between a pair of electrodes and spot-welding the sheet stack, in which at least one of the multiple steel sheets is a high-strength zinc-based coated steel sheet having a tensile strength of 780 MPa or more, the high-strength zinc-based coated steel sheet having a coating with an Al content of 0.5% or more by mass, and in which the heat shock region of the spot weld outwardly extending from an edge of a corona bond area includes a coated layer including an FeAl alloy layer having an average thickness of 0.3 μm or more and a zinc-based coated layer having an average thickness of 2.0 μm or more on the FeAl alloy layer at the interface between the base steel sheet of the high-strength zinc-based coated steel sheet and the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.