| 摘要 |
PROBLEM TO BE SOLVED: To provide a stainless steel sheet having 250-300 Hv Vickers hardness without applying quench-and-temper treatment or quenching treatment. SOLUTION: A slab of a chromium stainless steel, having a composition containing, by mass, <=0.1% C, <=0.1% N and 10.0-20.0% Cr, is hot rolled. The resultant hot rolled steel plate is formed into a ferrite single phase structure and then cold rolled at 15-70% draft to regulate Vickers hardness (Hv) to 250-300. Further addition of 0.05-1.0% Nb can practically prevent softening even if the steel undergoes heating.
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