Method for producing a steel sheet having remarkably excellent t

Details Method for producing a steel sheet having remarkably excellent t Method for producing a steel sheet having remarkably excellent t

1977-08-22

1979-02-06

Stallard, W.

Metal treatment

Compositions

Heat treating

148 12F, C21D 714

Patent

active

041382781

ABSTRACT:
A method for producing a steel sheet having excellent low-temperature toughness, comprising a step of heating to a temperature not higher than 1150.degree. C., a steel slab containing 0.01 - 0.13% C, 0.05 - 0.8% Si, 0.8 - 1.8% Mn, 0.01 - 0.08% total Al, 0.08 - 0.40% Mo and not more than 0.015% S with the balance being iron and unavoidable impurities, and a step of hot rolling the steel slab thus obtained by at least three passes with a minimum reduction percentage not less than 2% by each rolling pass in a temperature range of 900 - 1050.degree. C, a total reduction percentage not less than 50%, and with a finishing temperature not higher than 820.degree. C.

REFERENCES:
patent: RE28645 (1975-12-01), Aoki et al.
patent: 3960612 (1976-06-01), Kaku et al.
patent: 3997372 (1976-12-01), Matas et al.

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