Al-killed cold-rolled steel sheet with excellent demagnetization

Details Al-killed cold-rolled steel sheet with excellent demagnetization Al-killed cold-rolled steel sheet with excellent demagnetization

1985-02-25

1986-09-02

Stallard, Wayland

Metal treatment

Compositions

Heat treating

148 121, 148320, C21D 952

Patent

active

046094121

ABSTRACT:
An Al-killed cold-rolled steel sheet with excellent demagnetization characteristics is provided which is substantially consisted of 0.005% or less C; from 0.05 to 0.50% Mn; 0.010% or less S; from 0.01 to 0.08% Sol.Al; 0.0050% or less N; wherein Mn %/S %.gtoreq.7 and (Sol.Al % - 0.003%)/N %.gtoreq.6; and the remainder iron and inevitable impurities. A shadow mask made of such Al-killed cold-rolled steel sheet and a color television receiver using the same exhibit a very excellent function. A preferred process for producing such an Al-killed cold-rolled steel is also provided, said process being characterized in first obtaining a steel or a specific composition by the use of a vacuum degassing apparatus and then subjecting the steel to sequential steps of hot rolling, cold rolling, decarburization-annealing, and cold rolling.

REFERENCES:
patent: 4325752 (1982-04-01), Suda et al.

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