Fabrication of high Cu on non-oriented electrical steel

Effects of high content Cu on microstructure of hot rolled plates and microstructure, texture and magnetic properties of annealed finish product plates of non-oriented electrical steel were examined by means of EBSD technique and optical microscope. The results show that surface segregation of Cu significantly hindered recrystallized grain growth of surface layer in hot rolled plate during the coiling, as a result, the surface grain sizes of the hot-rohed plates decrease with the increase of Cu content, while no sighificant change of grain size at the hot-rolled plate centre is observed. Element of Cu can obviously improve the texture types and intensity, it is found that the addition of Cu significantly increase the intensity of favorable texture and reduces, unfavorable texture in the annealed strips. The addition of 0.35%Cu can effectively improve the magnetic properties of non-oriented electrical steel, and the iron loss reaches 4.1 W/kg and the magnetic induction reaches 1.8 T.