Case-hardening of stainless steel
US7431778B2 · kind B2 · utility
3Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2003 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Oct 23, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to case-hardening of a stainless steel article by means of gas including carbon and/or nitrogen, whereby carbon and/or nitrogen atoms diffuse through the surface into the article. The method includes activating the surface of the article, applying a top layer on the activated surface to prevent repassivation. The top layer includes metal which is catalytic to the decomposition of the gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.