Method of producing formable thin steel sheets

Details Method of producing formable thin steel sheets Method of producing formable thin steel sheets

1991-05-07

1992-10-20

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148651, 148240, C21D 802

Patent

active

051566940

ABSTRACT:
A formable thin steel sheet such as hot rolled sheet, cold rolled sheet or surface treated sheet comprises not more than 0.003 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, not more than 0.020 wt % of S, not more than 0.0045 wt % of O, not more than 0.0020 wt % of N, not more than 0.15 wt % of Al provided that a ratio of Al/N is not less than 30, and the balance being Fe and inevitable impurities, and has not only improved formability for press forming, deep drawing or the like but also improved fatigue resistance as a welded joint.

REFERENCES:
patent: 4586965 (1986-05-01), Obara et al.

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