Effect of Cold Rolling by Grooved Rolls upon the Formation of Recrystallization Texture of 3% Silicon Steels

Abstract

In this experiment, effects of groove-rolling developed by the present authors on the mechanism of recrystallization, on grain growth and on the formation of texture during annealing were studied. The experimental results are as follows.
When the specimens groove-rolled under high rolling reduction were annealed, their (100) [011] texture was favorably maintained in the entire process of annealing, except that a temporary decrease in (100) texture was noted during primary recrystallization. At a 60% groove-rolling reduction or above, a grain size reduction and increase in the fraction of (100) grains were noticed. The reduction by groove-rolling applied during cold rolling is exceedingly effective in the development of annealed texture. In fact, (110) [001] texture was observed to develop at a grooved roll reduction of 40-50%; (100) [hkl] texture at 50-60% reduction; and (100) [011] texture at 70% or above, each on annealing for twenty hours at 1170°C. The (100) [011] texture first formed during cold rolling was further developed on annealing into a higher level of the same texture.