Hot-formed previously welded steel part with very high mechanical resistance and production method
US11426820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2017 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2251/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welded steel part with a very high mechanical strength is provided. The welded steel part is obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet. The at least one first and second sheets including, at least in part, a steel substrate and a pre-coating which includes an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. A method for the fabrication of a welded steel part and the fabrication of structural or safety parts for automotive vehicles are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.