提Si降Mn改善50WG470高磁感电工钢性能

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

采用提Si降Mn的成分设计,进行高磁感无取向电工钢50WG470性能改善试验。50WG470原成分为1.4%Si-0.3%Al-0.8%Mn,试验钢成分为1.8%Si-0.3%Al-0.2%Mn。两种成分钢采用相同的工艺制度。试验结果表明,成分调整后,50WG470磁感B_(50)提高0.003 T,铁损P_(1.5/50)降低0.15 W/kg,屈服、抗拉强度提升20 MPa左右。试验钢常化卷晶粒尺寸明显较对比钢大,从而导致其γ纤维织构相对较弱、高斯织构相对较强。无取向硅钢常化卷晶粒尺寸对成品卷晶粒尺寸的影响不大,试验钢较对比钢成品晶粒尺寸差异不明显。Si元素较Mn元素对无取向硅钢的固溶强化作用明显更大。

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 P1.5/50 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’sγfibre 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.