Through process texture evolution and magnetic properties of high Si non-oriented electrical steels

A detailed understanding of microstructural changes in a sequence of thermomechanical processing allows the improvement of magnetic properties in FeSi strips. The current contribution considers the texture evolution in non-oriented electrical steels of high Si content. Hot band strips of various textures were subjected to cold rolling and recrystallization annealing. The findings suggest that the crystallographic orientations observed after cold rolling are correlated with the hot band texture. In contrast, the evolution of recrystallization textures was more likely affected both by the hot and cold rolling microstructural features. The evolution of recrystallization textures is discussed on the basis of crystal plasticity calculations while the magnetic properties are correlated with the crystalline anisotropy energy density.

► Low stored energy grains ensure improved magnetic properties (MP) in BCC metals.
► Texture randomization of magnetically unfavorable orientations improves the MP.
► Magnetically favorable texture of hot band improves the MP after recrystallization.