Cold-rolled steel sheets

Details Cold-rolled steel sheets Cold-rolled steel sheets

1985-07-15

1988-06-14

Yee, Deborah

Metal treatment

Stock

Ferrous

148330, 420126, C22C 3814

Patent

active

047509520

ABSTRACT:
A cold-rolled steel sheet for deep drawing having an improved bake hardenability, which comprises 0.005-0.015 wt % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, not more than 0.15 wt % of P, 0.005-0.10 wt % of Al, not more than 0.003 wt % of S and not more than 0.004 wt % of N provided that S+N is not more than 0.005 wt %, and Ti satisfying 1.ltoreq.Ti*/C.ltoreq.20, in which Ti*(%)=Ti(%)-(48/14)N(%)-(48/32)S(%). Such a cold-rolled steel sheet is obtained by continuously annealing the steel sheet after the cold rolling, provided that a residence time over a temperature region above recrystallization temperature is within 300 seconds.

REFERENCES:
patent: 4331488 (1982-05-01), Sudo et al.
Japanese Laid Open Appln. No. 59-31,828-Intl. Cl. C 21 D 9/48, English Abstract, Publication Date: Feb. 21, 1984.
Japanese Laid Open Appln. No. 59-31,827-Intl. Cl. C 21 D 9/48, C 21 D 9/48, C 21 D 8/04, C 22 C 38/14, English Abstract, Publication Date: Feb. 21, 1984.

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