Galvanized or galvannealed silicon steel
US9206498B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 4, 2008 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/261
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention deals with a hot-dip galvanized or galvannealed steel sheet wherein, the composition of the steel sheet comprises, by weight: 0.01≦C≦0.22%, 0.50≦Mn≦2.0%, 0.2≦Si≦3.0%, 0.005≦Al≦2.0%, Mo<1.0%, Cr≦1.0%, P<0.02%, Ti≦0.20%, V≦0.40%, Ni≦1.0%, Nb≦0.20%, the balance of the composition being iron and unavoidable impurities resulting from the smelting, and the steel sheet comprises a layer of an internal nitride of at least one type of nitride selected from a Si nitride, Mn nitride, Al nitride, complex nitride comprising Si and Mn, or Al and Si, or Al and Mn, or complex nitride comprising Si, Mn and Al, said steel sheet comprising no further outer layer of iron nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.