摘要:
A ferritic stainless steel sheet exhibiting small increase in strength after aging heat treatment in the present invention contains, by mass %, C: 0.020% or less, Cr: 10.0% to 25.0%, N: 0.020% or less, Sn: 0.010% to 0.50%, and one or more of Ti: 0.60% or less, Nb: 0.60% or less, V: 0.60% or less, and Zr: 0.60% or less so as to satisfy the following Equation (1), in which the difference between stress σ1 (N/mm2) after prestrain imparting tensile deformation with 7.5% of strain, and upper yield stress σ2 (N/mm2) when the steel sheet is subjected to heat treatment at 200° C. for 30 minutes and then to tension again after the tensile deformation is 8 or less. (Ti/48+V/51+Zr/91+Nb/93)/(C/12+N/14)≧1.0 (1)
摘要翻译:本发明的时效热处理后的强度稍小的铁素体系不锈钢板以质量%计含有C:0.020%以下,Cr:10.0〜25.0%,N:0.020%以下,Sn:0.010% 至0.50%,Ti:0.60%以下,Nb:0.60%以下,V:0.60%以下,Zr:0.60%以下的一种以上,满足下式(1),其中 在钢板在200℃下进行热处理后,预应变赋予拉伸变形与应变的7.5%之间的应力σ1(N / mm2)与上屈服应力σ(2 / N / mm2)之间的差异 30分钟后拉伸变形8次以后再次拉伸。 (Ti / 48 + V / 51 + Zr / 91 + Nb / 93)/(C / 12 + N / 14)≥1.0(1)