Effect of temper rolling on texture formation in a low loss cold-rolled magnetic lamination steel

The dependence of magnetic properties such as core loss and peak permeability on the temper rolling process has been studied in a semiprocessed, cold-rolled magnetic lamination (CRML) steel. The results indicate that temper rolling parameters such as temper mill extension and roll roughness have a significant influence on the magnetic properties. Material processed with high temper mill extension and smooth work rolls shows a sharper texture, which results in highly anisotropic peak permeability values between the rolling direction and the transverse direction. Texture analysis suggests that temper rolling with both high extension and smooth work rolls may concentrate strain at the surface, which would explain the development of the rolling texture at the surface.