The influence of chemical composition: Hebei silicon steel sheet components generally include three types of elements. The first type is based on alloy elements such as silicon, aluminum, manganese, and other impurity elements. The second type is C, S, N, O, and the third type is trace elements such as Sb, Sn, etc.

The influence of the first element

Silicon, aluminum, and manganese alloy elements are very useful in reducing the magnetic anisotropy constant K1 and low saturation hysteresis stretching constant λ of iron. With simple magnetization, the pH value decreases, and these elements can also carry high electrical resistivity, reducing Pe. Therefore, improving the content of the first element can reduce iron loss. However, when the content of these elements is too high, they are all cold hard and brittle materials.

The influence of the second type of element

C、S、N、O、 The presence of harmful elements, such as sulfides, nitrides, carbides, and oxides, can cause small-scale dispersion in steel and hinder the growth of product grains during annealing, resulting in poor magnetic function. Therefore, the requirements for the content of these elements in steel should be as low as possible.

The influence of the third type of element

Adding a small amount of Sb and Sn to non oriented silicon steel can improve the structure of non oriented silicon steel sheets after recrystallization annealing, reduce iron loss, and enhance magnetic induction. Adding a small amount of these elements can also suppress the formation of oxide and nitride layers, improving magnetism.

Grain size

The movement resistance of grain boundaries and domain walls with large particle size and low quantity is small, and the hysteresis loss decreases. On the other hand, with larger particle size and increased magnetic domain volume, eddy current losses and abnormal losses are added. Therefore, there is a suitable critical grain size for reducing total iron.

Impurities, inclusions, and internal pressure

The inclusions and impurity elements in non oriented silicon steel sheets should be minimized as much as possible, which is a more important measure to improve magnetism. They not only hinder the hysteresis loss and high coercivity of domain wall motion, but also create a closed domain to reduce the difficulty of magnetization in static magnetic energy. They have a negative impact on both grain growth and structural components. Any silicon steel plate with internal pressure and added coercive force.

crystal structure

Oriented towards silicon steel, improving B8 significantly reduces hysteresis loss. Silicon steel sheets without orientation (100) have high surface texture, lower hysteresis loss and P15 (110), and the texture (111) is found to be the worst.

Article source: Transformer silicon steel sheethttp://www.cheungshun.com/