Hot-pressed member, steel sheet for hot pressing, and methods for producing the hot-pressed member and the steel sheet for hot pressing
US12157924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/48
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot-pressed member, a steel sheet for hot pressing, and methods for producing the hot-pressed member and the steel sheet for hot pressing. The hot-pressed member includes a steel sheet and a Zn-based alloy coated layer disposed on at least one surface of the steel sheet. The Zn-based alloy coated layer includes a solid solution phase including Zn with the balance being Fe and incidental impurities, an intermetallic compound phase including Fe with the balance being Zn and incidental impurities, and an oxide layer including Zn. The oxide layer serves as an uppermost layer of the Zn-based alloy coated layer and splits the intermetallic compound phase. The split density in at least one cross-section of the oxide layer per unit cross-section is 10 split positions/mm or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.