Fe-19%Cr フェライト合金の熱間圧延による変形帯の形成とその後の静的再結晶挙動(熱間加工と再結晶)(<特集>再結晶・粒成長)

概要

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The effects of initial grain size (1000μm and 430μm), rolling temperature and reduction on the deformation structure and recrystallization behavior of a hot rolled Fe-19%Cr ferritic alloy were investigated. The characteristics of the deformation band formed by hot rolling and its effect on recrystallization were crystallographically studied. The main results are as follows. (1) Above 1000℃ well defined subgrain substructures are observed. With increasing temperature, the subgrain size increases. In specimens hot rolled below 1100℃, deformation bands are observed preferentially near grain boundary. (2) The number of deformation bands increases with increasing rolling reduction or decreasing grain size. The deformation band and the matrix are correlated with a rotation in the range of 35°-55° around a <110> common axis. The orientations of deformation band and matrix are nearly <100>⫽N.D and <211>⫽N.D, or <211>⫽N.D and <100>⫽N.D The subgrain size of <100>⫽N.D orientation is coarse, compared with those of other orientations. (3) The recrystallization occurs preferentially in the boundary area containing deformation bands. Recrystallized grains have almost the same orientation as the matrix or the deformation band. Decreasing the rolling reduction retards recrystallization, especially in coarse grained specimens. The retardation is attributed to the decrease of deformation bands.
社団法人日本鉄鋼協会の論文
1984-11-01