Method and device for joint oxydation and heat treatment of workpieces
US6383297B1 · kind B1 · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Feb 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a method for joint oxydation and heat treatment of workpieces at temperatures ≦1300° in the treatment chamber of an oven containing a neutral or reactive gas in a temperature range above 570°. In order for the process to be reproducible and to produce homogeneous oxide layers, the PH2O/PH2 ratio is adjusted after transformation of the workpiece structure such as found at the ambient temperature into the structure wanted during the heat treatment in such a way that the line FeO+H2=Fe+H2O is exceeded and an oxide layer is formed from FEO<10 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.