In this article, Baowu will show you what silicon steel is.

Silicon alloy steel with silicon content of 1.0 to 4.5% and carbon content of less than 0.08% is called silicon steel. It has the characteristics of high permeability, low coercivity, and large resistivity, so hysteresis loss and eddy current loss are small. Mainly used as magnetic materials in motors, transformers, electrical appliances and electrical instruments. In order to meet the needs of punching and shearing when manufacturing electrical appliances, a certain degree of plasticity is also required. In order to improve the magnetic induction performance and reduce the hysteresis loss, it is required that the content of harmful impurities is as low as possible, and the plate shape is required to be flat and the surface quality is good.

According to the manufacturing process and use, electrical steel is divided into three categories: hot-rolled silicon steel, cold-rolled electrical steel and special-purpose silicon steel.

Among them, hot-rolled silicon steel, also known as non-oriented silicon steel, has a silicon content of 1.0% - 4.5% and a nominal thickness of 0.35mm and 0.5mm. It is mainly used in transformers, household motors and micro motors.

Cold-rolled electrical steel is divided into cold-rolled non-oriented electrical steel and cold-rolled oriented silicon steel. The silicon content is less than or equal to 3.3%. Among them, cold-rolled non-oriented electrical steel is mainly used for large and medium-sized motors, generators, transformers and ballasts, while cold-rolled grain-oriented silicon steel is mainly used for large and medium-sized transformers and ballasts.

The silicon content of cold-rolled grain-oriented silicon steel is 2.9% - 3.3%, and the nominal thickness is mainly 0.18mm, 0.23mm, 0.27mm, 0.3mm, 0.35mm, mainly used for large, medium and small transformers and ballasts.

In addition, silicon steel has its unique properties, mainly the following points.

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.

The above is the relevant content of silicon steel products. If you want to know more, please feel free to contact me.