Abstract: Based on the industrial manufacture of non-oriented silicon steel sheets, the influence of shear gap size, sample size, sample direction, and the ratio of yield and tensile on the magnetic properties were studied. The results show that with the increase of shear gap, the proportion of shear plane in thickness direction decreases gradually. Thus, the iron loss and magnetic induction will deteriorate by different degree, and the iron loss degradation rate is much higher than the magnetic induction degradation rate. Moreover, the iron loss degradation rate in the L direction is much higher than that in the C direction. With the decrease of sheared sample size, the iron loss and magnetic inductance will also deteriorate and are affected by the yield ratio of the material. The deterioration rate of magnetic properties is obvious increase with the increase of yield ratio for the sheared sample.

Key words: non-oriented silicon steel sheet, mechanical shearing, stress, microstructure, yield ratio, magnetic properties