Method of producing a part with very high mechanical properties from a rolled coated sheet
US9611530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2006 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Sep 30, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a steel part coated with a compound consisting, over more than 90% of its thickness, of at least one Fe/Zn-based phase, the iron weight content of which is equal to 65% or higher and the Fe/Zn ratio of which is between 1.9 and 4, said compound being formed by at least one heat treatment for alloying between said steel and a precoat, said precoat consisting of a zinc alloy comprising, the contents being expressed by weight, between 0.5 and 2.5% aluminum and, optionally, one or more elements chosen from: Pb≦0.003%; Sb≦0.003%; Bi≦0.003%; 0.002%≦Si≦0.070%; La<0.05%; Ce<0.05%, the balance consisting of zinc and inevitable impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.