Silicon steel refers to a very low carbon ferrosilicon alloy with a silicon content of 0.5% to 4.5%. It is divided into non-oriented silicon steel and oriented silicon steel due to different structures and uses. Silicon steel is mainly used as the core of various motors, generators, compressors, motors and transformers. It is an indispensable raw material product in the electric power, home appliances and other industries.
Silicon steel sheets are roughly classified into hot-rolled silicon steel sheets (relevant departments have forced their elimination in recent years), cold-rolled oriented silicon steel sheets (the most important use is for transformer manufacturing), high magnetic induction cold-rolled oriented silicon steel sheets (mainly Used in the manufacturing of various transformers, chokes and other electromagnetic components in the telecommunications and instrumentation industries), cold-rolled non-oriented silicon steel sheets (the most important use is in motor manufacturing). This article will focus on cold-rolled non-oriented silicon steel sheets.
2. Density, maximum specific total loss, minimum magnetic polarization intensity, and minimum stacking coefficient of cold-rolled non-oriented silicon steel sheets
3. Thermal expansion coefficient of cold-rolled non-oriented silicon steel sheet
This article takes a silicon steel sheet containing 6.5% silicon content as an example. Its thermal expansion coefficient is 11.6*10^-6K. Please refer to the actual manufacturer for the specific value.
4. Chemical composition of cold-rolled non-oriented silicon steel sheets
Ferrosilicon alloy with very low carbon content. The grains in the deformed and annealed steel plate are randomly oriented. Also known as low silicon wafer, the silicon content of the alloy is 1.5% to 3.0%, or the sum of silicon and aluminum content is 1.8% to 4.0%. The products are usually cold-rolled plates or strips with nominal thicknesses of 0.35 and 0.5mm. The low silicon wafer contains less than 2.8% silicon. It has a certain mechanical strength and is mainly used to manufacture motors and generators.
5. Naming rules for silicon steel sheets
The grade of cold-rolled electrical steel is composed of English letters and numbers. The letters indicate orientation or non-orientation. The first number indicates the thickness of the steel (number/100), and the last number indicates the iron loss (number/100). For example, the grades of oriented steel are 30Q120, 30Q130, 30Q140, etc., and the grades of non-oriented steel are 50W470, 50W600, etc.