Non-oriented electrical steel is mainly used as the iron core of large and medium-sized motors, generators, household motors and micro-motors, ballasts and small transformers. The main magnetic performance requirements of non-oriented electrical steel are low specific total loss and high magnetic polarization. The low specific total loss can save a lot of electric energy and extend the working time of the motor. High magnetic polarization means that the magnetization ability is strong, the excitation current of the iron core is reduced, and the specific total loss and iron loss are reduced.