Improving the Properties of 50WG470 High Magnetic Induction Electrical Steel by Elevating Si Content and Reducing Mn Content

The experiment was conducted to improve the properties of the high magnetic induction 50 WG470 grade electrical steel by using the chemical composition design of elevating Si content and reducing Mn content based on the original composition 1.4%Si-0.3%Al-0.8%Mn.The composition of the experimental steel is 1.8%Si-0.3%Al-0.2%Mn.The same processing schedule was used for both steels.The results show that the magnetic induction B₅₀ of the experimental 50 WG470 is improved by about 0.003 T,the iron loss P_1.5/50 decreases by about 0.15 W/kg,the yield strength and tensile strength increase about 20 MPa.The grain size of experimental steel in normalizing coil is bigger than that of the comparative steel.The density of the experimental steel’s γ fibre texture is lower than that of the comparative steel.And the density of the experimental steel’s Goss texture is higher than that of the comparative steel.For non-oriented electrical steel,the grain size of the normalizing coil steel has little influence on the grain size of the final product.The grain size difference of the final product between the experimental steel and the comparative steel is not obvious.The solid solution enhancement effect of element Si oo non-oriented electrical steel is much bigger than that of element Mn.