Abstract: The effects of annealing temperature on microstructure and texture and magnetic properties of 3.1 % Si non-oriented silicon steel were investigated in this paper. The results showed that, when the annealing temperature increased from 940 ℃ to 1 000 ℃, the average grain size of metallographic structure increased from 98 μm to 145 μm, the iron loss value P1.5/50 decreased from 2.576 W/kg to 2.408 W/kg. And as the annealing temperature increased, the strength of the unfavorable texture component γ gradually decreased, the strength of the {111}〈112〉 texture component decreased by about 16 %, so that the magnetic induction B50 gradually increased,and the magnetic properties was improved.

Key words: non-oriented silicon steel, annealing temperature, microstructure, texture, magnetic properties