Effects of Bending Deformation on the Domain Structure and Magnetic Properties of Non-oriented Silicon Steel

The evolution of magnetic domain and magnetic properties of B35 AV1900 non-oriented silicon silicon steel had been studied under the condition of small deformation amplitude in this paper.Soft magnetic ac/dc tester,bitter pattern,residual stresses the X-ray detector and hardness tester had been used to acquire the variation characteristics of magnetic domain structure,bending stress,hardness and the effect laws of magnetic properties.The results show that the ac/dc performances of the silicon steel have been significantly worsen as the bending angle increases.When the bending angle is increased from 0° to 18°,iron loss of silicon steel deteriorates by 23.2%,coercive force increases,magnetic permeability and residual magnetic induction intensity decreases.The bending stress increases with the angle,hardness of the silicon steel also shows a slight increase.At the same time,when the deformation increases,the kinds of magnetic domain increases,magnetic wall width and the spacing between adjacent magnetic wall become narrow as well.