Effect of {110}<229> and {110}<112> Grains on Texture Evolution during Cold Rolling and Annealing of Electrical Steel

Abstract

In this study, the electrical steel samples containing different-sized {110}<229> and {110}<112> oriented grains are cold rolled and annealed to investigate the effect of these grains on deformation and recrystallization texture evolution, and the origins and evolution of {110}<229> and {110}<112> grains in recrystallized samples are paid special attention. After rolling, initial {110}<229> and {110}<112> grains lead to γ-fiber deformation texture and γ-fiber as well as {112}<110> deformation textures respectively, and the crystal rotations show combined effects of initial orientation, surface shear and surrounding matrix. After annealing, in the case of large initial grains, preferred {hk0}<001> nucleation occurs in initial {110}<229> grains and lead to {hk0}<001> recrystallization texture accordingly. Compared to initial {110}<001> grains, the lower intensity of {hk0}<001> texture, spreading to cube component, is attributed to the deviation of deformed orientation from {111}<112>. In contrast, coarse recrystallized microstructure and weak recrystallization texture are obtained in initial {110}<112> grains. Similarly, small {110}<229>-<112> grains in annealed hot bands also contribute to {hk0}<001> recrystallization texture, meanwhile {112}<110> deformed matrix induced by initial {110}<112> grains affect texture and microstructure evolution. With respect to {110}<229> and {110}<112> grains in recrystallized samples, the majority of them nucleate in α-fiber deformed matrix, and larger size than {110}<001> recrystallized grains is illustrated.