High Magnetic Electrical Steel Coil Non Grain Oriented Strips 0.2mm

High Magnetic Electrical Steel Non Grain Oriented Strips 0.2mm

Ferrosilicon alloys with very low carbon content.The grain orientation distribution is irregular in the deformed and annealed steel plate.The silicon content of the alloy is 1.5% ~ 3.0%, or the sum of silicon and aluminum content is 1.8% ~ 4.0%.The products are usually cold-rolled sheet or strip, with nominal thickness of 0.35 and 0.5mm, and are mainly used in the manufacture of electric motors and generators.

Different brands, the content requirements of these elements are also different.Aluminum improves strength and hardness and reduces ductility of electrical steel.But aluminum does not have the same effect on ductility as silicon, and has a similar effect.Therefore, with the increase of grade, silicon content can be increased to about 3% without changing, and aluminum content can be gradually increased to 1%.General grade aluminum content is 0.3% ~ 0.6%.The content of carbon, sulfur and manganese decreases with the increase of brand.High grade impurity content is: S<0.002%, C<0.003%, N2<0.002%, O2<0.002%, after annealing without decarbonization, to prevent the formation of internal oxidation layer and internal nitriding layer.In addition, Ti<0.005% and Zr<0.002% are required to prevent the formation of fine TiN, ZrN and TiC and hinder the growth of grains.