Patent ID: 6063214
Filing Date: 2000-05-16
Classification: C21D,C22C

Abstract:
A method of producing a high-strength steel sheet having excellent workability used for can making comprising:hot rolling a slab at a temperature within the range of about the Ar.sub.3 transformation temperature to about 950.degree. C. to provide a rolled steel strip;coiling the rolled steel strip at a temperature range of about 400.degree. C. to 600.degree. C. to provide a hot-rolled steel strip;pickling and cold rolling the hot-rolled steel strip to provide a cold-rolled steel strip;continuously annealing the cold-rolled steel strip at a temperature higher than its recrystallization temperature;and then temper rolling the annealed cold-rolled steel strip at a reduction of about 5% or more;wherein said slab comprises:C: about 0.0005 to 0.01 wt %,N: about 0.001 to 0.04 wt %,the total amount of C and N being about 0.008 wt % or more and at least a majority of the components C and N being present as a solid solution,Mn: about 0.05 wt % to 2.0 wt %,Al: about 0.005 wt % or less,O: about 0.01 wt % or less, andthe balance consisting of Fe and impurities.