17Crステンレス鋼の再結晶集合組織におよぼすCuおよびTiの影響

Abstract

Effect of the fine precipitates produced in the final annealing on the development of recrystallization texture of 17%Cr stainless steel has been investigated as part of a general study of variations in the recrystallization texture due to various minor elements contained in the steel. The hot rolled bands supersaturated with copper or some of titanium were cold rolled and annealed. The recrystallization kinetics and textures were observed as functions of cold reduction and heating rate in the final annealing. The results are as follows:(1) In both cases, the recrystallization textures mainly composed of the {111}〈112〉 and {111}〈110〉 orientations are found to develop more markedly with increasing cold reduction.(2) The heating rate has a slight effect on the recrystallization textures of the sheets at high cold reductions: sharp {111}〈112〉 type textures develop in both cases by the mechanism of “in situ” recrystallization.(3) At lower cold reductions, the recrystallization texture of the copper-bearing steel depends slightly on the heating rate, whereas that of the titanium-bearing steel markedly depends on the heating rate as in with low-carbon aluminum-stabilized or copper-bearing steels.