Abstract: Microstructure, texture and magnetic properties of cold rolling and annealing non-oriented silicon steel for high efficiency motor with normalizing and without normalizing were investigated through scanning electron microscope, EBSD and Epstein frame. The results showed that after normalizing, the cold rolling samples are featured by shear bands and deformation bands. Comparing to the samples without normalizing, the grain size of the samples with normalizing after annealing is bigger, the γ and α* fiber texture are weakened, while the ηfiber texture is enhanced. The iron loss of the samples with normalizing after annealing is lower and the magnetic induction intensity is higher.

Key words: high efficiency motor, non-oriented silicon steel；normalizing；microstructure；magnetic properties