Silicon steel, as a commonly used steel, has a wide range of uses and is widely used in industry. It can make the designed magnetic induction high, the iron core small, and the weight light. It can save silicon steel, wires, insulating materials, structural materials, etc., which not only reduces the loss and manufacturing cost of motors and transformers, but also facilitates assembly and transportation. It has the characteristics of high permeability, low coercivity and large resistance coefficient, so the hysteresis loss and eddy current loss are small. It is mainly used as magnetic material in motors, transformers, electrical appliances and electrical instruments.