Process for producing a high tension steel sheet product having an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher
US4105474A · kind A · utility
9Cited by
4References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 12, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Apr 12, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0263
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C after the hot rolling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.