極低炭素鋼のフェライト域熱延-再結晶焼鈍過程における集合組織形成におよぼす熱延ひずみ速度の影響

概要

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The effect of strain rate during hot-rolling below Ar_3 transformation temperature on the formation of recrystallization textures of Ti-added extra-low-carbon sheet steel has been investigated. The intensity of {222} component of recrystallized sheet steel increased with the increase of the strain rate. Textures of hot-rolled sheet steels, which were similar to those of cold-rolled sheet steels, didn't depend on the strain rate. The {222} residual strain of specimens hot-rolled at high strain rate was higher than that of low strain rate specimens while {211}, {200} and {110} residual strains were independent of the strain rate. {111} oriented grains of the high strain rate specimen recovered faster than those of the low strain rate specimen while no change in recovery rate of {100} oriented grains was observed. Based on the above results, it is concluded that high strain rate hot-rolling at the ferrite region provides high stored energy only in {111} oriented grains, with the result that {111} oriented grains recover swiftly and intense {111} recrystallization texture is formed.
社団法人日本鉄鋼協会の論文
1988-12-01