The requirements for the performance of silicon steel are mainly:
1. Silicon steel requires 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. Silicon steel requires high magnetic induction (magnetic induction) under a strong magnetic field, which reduces the volume and weight of the iron core of motors and transformers, and saves silicon steel sheets, copper wires and insulating materials.
3. Silicon steel requires smooth, flat surface and uniform thickness, which can improve the filling factor of the iron core.
4. Silicon steel requires good punchability, which is more important for the manufacture of micro and small motors.
5. Silicon steel requires good adhesion and weldability of the surface insulating film, which can prevent corrosion and improve punching properties.
6. The basic non-magnetic aging of silicon steel.
Generally, with the increase of silicon content, the iron loss, punchability and magnetic induction of silicon steel sheet decrease. The higher the hardness, the higher the working frequency and the greater the eddy current loss. The thinner the silicon steel sheet should be.
