Ultra high strength, secondary hardening steels with superior toughness and weldability
US5900075A · kind A · utility
25Cited by
5References
7Claims
0Family size
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Key dates
| Filing date | Jul 8, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Jul 8, 2017 |
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.