SUS304 オーステナイト系ステンレス鋼の冷間圧延および再結晶集合組織

概要

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The cold-rolling and annealing textures of SUS304 stainless steel strip has been investigated. The results obtained are as follows. 1) The deformation texture of a strip rolled at room temperature can be described as a mixture of the ferritic type (α′martensite) and the brass type (retained austenite). 2) The α′martensitic phase transforms reversely into austenitic phase at 700℃. The two components {111}<112>α′and {100}<011>α′can be related to the {110}<112>γ brass type texture by Kurdjumov-Sachs and Nishiyama relations, and the {112}<110>α′can be related to the {110}<001>γ. 3) The recovery of internal stress accumlated by cold-rolling is faster in the {112}γ and {113}γ components than in the {110}γ component. The {110}<112>γ component of the deformation texture decreases for the annealing temperature above 800℃. The strong components of annealing texture above 900℃ are consissted mainly of the near {112}<111>γ and near {113}<332>γ. These results suggest that the grains of the {112}∿{113} components recrystallize at lower temperature and absorb eventually yet unrecrystallized region of the {110} component. These structure changes during recrystallization process were confirmed by transmission electron microcopy.
1991-04-01