Cold Rolling and Annealing Texture of 1% Carbon Steel

概要

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1% carbon steel was cold-rolled to 50〜98.4% reduction by adhering ductile materials to the sheet edges. Globular cementite particles (Fe_3C) were formed on annealing the cold-rolled sheet below A_1 point. The effect of these particles on the annealing process and texture was studied. The results obtained are summarized as follows : (1) The cold rolling texture consists of three preferred orientations, (001) [110], (112) [110] and (111) [211], as in the case of iron and low carbon steels, but with increasing reduction. (111) [211] component disappears, while (001) [110] and (112) [110] components become dominant. (2) The mean inter-spacing of Fe_3C particles is smaller than the critical size of the recrystallization nuclei at the annealing 700℃×10 hr and becomes nearly equal to at 700℃×hr, that is, the nucleation of recrystallization is remarkably retarded by Fe_3C particles. (3) Even after a prolonged annealing (700℃×100 hr), the annealing textures are similar to the rolling texture, but at 98.4% reduction the (112) [110] component which has a higher growing rate of its subgrains than that of (001) [110] component becomes very dominant. From these results the recrystallization mechanisms are discussed.
東北大学の論文