Production of a base steel sheet to be surface-treated which is

Details Production of a base steel sheet to be surface-treated which is Production of a base steel sheet to be surface-treated which is

1985-05-31

1986-05-06

Stallard, Wayland

Metal treatment

Compositions

Heat treating

C21D 946

Patent

active

045869650

ABSTRACT:
Disclosed herein is a method of manufacturing a base steel sheet, which method comprises combined steps of: not rolling a steel slab containing not more than 0.0070% by weight of C (hereinafter referred to briefly as "%"), not more than 0.1% of Si, not more than 0.5% of Mn, 0.010 to 0.080% of Al, not more than 0.0050% of N, not more than 0.030% of S provided that the ratio of Mn/S is not less than 10, and not more than 0.030% of P while the hot rolling being terminated at a finish temperature of not less than 800.degree. C.; cold rolling thus obtained hot rolled steel sheet in an ordinary manner; continuously annealing the cold rolled steel sheet in which heating is done up to a temperature from a recrystallization temperature to 800.degree. C., followed by cooling; and then temper rolling the annealing steel sheet at a reduction of not less than 7% by using two or more stand rolling mill, whereby the thus obtained base sheet, to be surface-treated may be utilized for a tinplate or a tin free steel in which no stretcher strain is formed even after baking treatment.

REFERENCES:
patent: 3947294 (1976-03-01), Asamura et al.
patent: 4350538 (1982-09-01), Imai et al.
patent: 4368084 (1983-01-01), Irie et al.
patent: 4517031 (1985-05-01), Takasaki et al.

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