Process for producing a high tension steel sheet product having

Details Process for producing a high tension steel sheet product having Process for producing a high tension steel sheet product having

1980-11-14

1983-05-24

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 36, C21D 802

Patent

active

RE0312517

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.

REFERENCES:
patent: 3795506 (1974-03-01), Yamaguchi et al.
patent: 3857740 (1974-12-01), Gondo et al.
patent: 3904447 (1975-09-01), Gondo et al.
patent: 3960612 (1976-06-01), Kaku et al.
patent: 3976514 (1976-08-01), Matsukura et al.
patent: 4008103 (1977-02-01), Miyoshi et al.
patent: 4138278 (1979-02-01), Nakasugi

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