Patent ID: 6410163
Filing Date: 2002-06-25
Classification: C22C,C23C,Y10S,Y10T

Abstract:
A manufacturing method of a high strength thin steel sheet excellent in workability and galvanizability, comprising the steps of hot-rolling a slab having a composition comprising:C: from 0.01 to 0.20 wt. %, Si: up to 1.0 wt. %, Mn: from 1.0 to 3.0 wt. %, P: up to 0.10 wt. %, S: up to 0.05 wt. %, Al: up to 0.10 wt. %, N: up to 0.010 wt. %, Cr: up to 1.0 wt. %, Mo: from 0.001 to 1.00 wt. %, and the balance Fe and incidental impurities, coiling the hot-rolled steel sheet at a temperature of up to 750Â° C., and then, after heating the steel sheet to a temperature of at least 750Â° C., cooling the same.