Furnace for the heat treatment of scale-covered steel
US4397451A · kind A · utility
24Cited by
4References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 17, 1982 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Feb 17, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/82
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A scale-covered, hot-rolled steel work is heated under a reducing atmosphere and is then allowed to slowly cool while placed under the reducing atmosphere. Thereafter the work is maintained at a predetermined temperature under an oxidizing atmosphere to cause the scale to be re-oxidized. The work with the re-oxidizing scale is then allowed to stand to cool quickly, imparting fine cracks to the scales. The scales can readily be removed from the work during the subsequent pickling step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.