The requirements for the performance of silicon steel are mainly:
1. Low iron loss, which is the most important indicator of the quality of silicon steel sheets. All countries divide the grades according to the iron loss value. The lower the iron loss, the higher the grade.
2. The magnetic induction intensity (magnetic induction) is high under the strong magnetic field, which reduces the volume and weight of the iron core of the motor and the transformer, and saves silicon steel sheets, copper wires and insulating materials.
3. The surface is smooth, flat and uniform in thickness, which can improve the filling factor of the iron core.
4. Good punching performance is more important for the manufacture of micro and small motors.
5. The surface insulating film has good adhesion and weldability, and can prevent corrosion and improve punching properties.
