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Basic knowledge of silicon steel lamination and material performance requirements
Mar 03, 2018

Silicon steel lamination is a ferrosilicon soft magnetic alloy material, which contains very little carbon. The amount of silicon is usually 0.5 to 4.5%. The addition of silicon to steel lamination can significantly improve the resistivity and maximum permeability of iron, reducing coercivity, core loss (iron loss) and magnetic aging.


Overview of the basic knowledge of silicon steel lamination

   Considering the current processing and production situation,the processing technology used on producing silicon steel lamination is more complicated and its process window is narrow, also the production is more difficult, which is known as handicrafts among the steel products.


Introduction of silicon steel lamination

   From the point of view of output, the output of silicon steel account for about one percent of the total steel. At present, it is mainly used to produce a variety of transformers, motors and generators of iron core.


The performance requirements of silicon steel lamination

   For silicon steel, the most basic of its quality requirements is a low iron loss. Currently in production it is mainly based on the classification of iron loss grades, the lower the iron loss is, the higher the grade is. The second requirement is the high magnetic induction in a strong magnetic field, because it can reduce the core volume and weight of the motor and transformer, saving the amount of material. The third point is that the surface is smooth and uniform thickness, can improve the core filling factor. In addition, it should also have good punching properties, which is more important for the manufacture of miniature and small motors. At the same time the surface insulating film adhesion and weldability should be achieved well which can prevent erosion and improve punching properties.

   Under normal circumstances, when the silicon content increases, the silicon steel lamination loss, punching and magnetic induction will be reduced, while the hardness is increasing. The higher the frequency of work is, the greater the eddy current loss is, the smaller the thickness of the selected silicon steel lamination should be.

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