Silicon steel sheets for electrical purposes are commonly known as silicon steel sheets or silicon steel sheets. It is a kind of ferrosilicon soft magnetic alloy with very low carbon content. Generally, the silicon content is 0.5~4.5%. It is made by hot and cold rolling. Generally, the thickness is less than 1mm, so it is called thin plate. Adding silicon can increase the resistivity and maximum permeability of iron, reduce coercivity, core loss (iron loss) and magnetic aging. Mainly used to make iron cores of various transformers, motors and generators. The world's silicon steel sheet production accounts for about 1% of the total steel (see precision alloys). The silicon steel sheet belongs to the plate class in a broad sense, and it is an independent branch due to its special purpose.
Classification of silicon steel sheet：
A. Silicon steel sheets can be divided into low silicon and high silicon according to their silicon content. Low silicon wafer contains less than 2.8% silicon, it has certain mechanical strength, it is mainly used to make motors, commonly known as motor silicon steel sheet; high silicon wafer contains 2.8%-4.8% silicon, it has good magnetic properties, but it is brittle, mainly used Used in the manufacture of transformer cores, commonly known as transformer silicon steel sheets. There is no strict boundary between the two in actual use, and high-silicon wafers are often used to manufacture large motors.
B. According to the production process, it can be divided into two types: hot rolling and cold rolling. Cold rolling can be divided into two types: non-oriented and oriented. Cold-rolled sheets have uniform thickness, good surface quality and high magnetic properties. Therefore, with the development of industry, hot-rolled sheets have a tendency to be replaced by cold-rolled sheets. "Replace heat with cold").
Silicon steel sheet performance index
A. Low iron loss. The most important indicator of quality, all countries in the world classify grades by iron loss value. The lower the iron loss, the higher the grade and the higher the quality.
B. High magnetic induction intensity. In the same magnetic field, a silicon steel sheet with higher magnetic induction can be obtained. The motor or transformer core made of it has a small volume and weight, and relatively speaking, it can save silicon steel sheet, copper wire and insulating materials.
C. High stacking factor. The surface of the silicon steel sheet is smooth, flat and uniform in thickness, and the stacking factor of the manufactured iron core is improved.
D. Good film development. This is even more important for the manufacture of small and micro motor cores.
E. The surface has good adhesion and solderability to the insulating film.
F. Magnetic aging
G. Silicon steel sheets must be delivered after annealing and pickling.
The price of silicon steel sheet continues to rise！
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