Abstract: The effect of annealing temperature after cold rolling on the microstructure, texture evolution and magnetic properties of 0.5 % Si non-oriented silicon steel was investigated under laboratory conditions. The results showed that the increase of the annealing temperature from 675 ℃ to 725 ℃ was conducive to the increase of the recrystallization rate , and the recrystallization was completed at 725 ℃. The average grain size was increased from 18.2 μm to 40.2 μm with the increase of annealing temperature from 725 ℃ to 850 ℃. Therefore, P1.5/50 was decreased from 10.4 W/kg to 4.5 W/kg with the increase of annealing temperature from 675 ℃ to 850 ℃. When the annealing temperature increased from 675 ℃ to 725 ℃, the magnetic induction increased gradually due to the increase of recrystallization rate. By contrast, with the increase of annealing temperature from 725 ℃ to 850 ℃, the volume fraction of {111} grains was increased from 35.8 % to 40.4 %, and the beneficial {001} and that of the Goss grains was decreased from 14.8 % to 12.8 %, thus reducing B50 from 1.76 T to 1.74 T. Therefore, It is necessary to select the appropriate annealing temperature to obtain the properties of lower iron loss and higher magnetic induction.

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