Ultra high strength, secondary hardening steels with superior toughness and weldability
US5876521A · kind A · utility
13Cited by
4References
7Claims
0Family size
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
High strength steel is produced by a first rolling of a steel composition, reheated above 1100.degree. C., above the austenite recrystallization, a second rolling below the austenite recrystallization temperature, water cooling from above Ar.sub.3 to less than 400.degree. C. and followed by tempering below the Ac.sub.1 transformation point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.