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What are the factors affecting the performance of EI silicon steel sheet?
Dec 12, 2018

There are many factors affecting the performance of EI silicon steel sheet. Most of them are the influence of chemical composition. The basic composition of silicon steel is composed of three major factors. The first type is basic alloying elements such as Si, Al, Mn, which can reduce the magnetic anisotropy constant and saturation hysteresis constant and increase the resistivity; the second type is C, S, N, O, Ti, Zr and other impurities. The element can form small dispersed carbides, sulfides, nitrides and oxides in the steel, hindering the grain growth of the finished annealing, and the magnetic properties are unfavorable; the third type is the addition of a small amount of such elements such as Sb, Sn and the like to inhibit internal oxidation. Formation of the layer and nitride layer and improved magnetic properties.

The grain size also affects the performance of the EI silicon steel sheet, the grain size, the grain boundary amount is small, the domain wall motion resistance is small, and the hysteresis loss is reduced. On the other hand, the grain size is large, the domain size is increased, and eddy current loss and abnormal loss are increased. So there is a suitable critical grain size to reduce the total iron loss.

EI silicon steel sheet performance inclusions and impurity elements should be minimized, which is the most important measure to improve magnetic properties. They not only hinder the movement of the domain walls to increase the hysteresis loss and coercive force, but also make the magnetization difficult due to the decrease in the surrounding magnetostatic energy. They also have a poor effect on particle growth and texture components. Any internal stress in the silicon steel sheet increases the coercivity. 

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