Effect of Strain Rate of Hot Rolling below Aγ₃ on Formation of Recrystallization Textures of an Extra-low-carbon Steel

Abstract

The effect of strain rate during hot-rolling below Aγ₃ 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 lowstrain 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.