The Influence of Normalization Temperatures on Different Texture Components and Magnetic Properties of Nonoriented Electrical Steels

Abstract

The effects of normalization on different texture components and magnetic properties in G50W600 nonoriented electrical steel are studied by electron backscatter diffraction (EBSD). The results show that normalization can coarsen surface {110}‐oriented grains and recrystallized rotated cube or {114}<481>‐oriented grains in the center. Moreover, the highest texture intensity change from original rotated cube texture to the {114}<481> texture with the increase of normalization temperature. Just after the completion of recrystallization in final sheets corresponding to hot‐rolled samples, {111}<112> is the main texture component, while that in final sheets corresponding to normalized samples is {114}<481>. The final sheets normalized at 920 and 980 °C have a higher iron loss and higher magnetic induction than the final sheets corresponding to hot‐rolled samples, which is caused by the fact that normalized samples show finer final grain size, higher volume faction of {100} and {110}, and lower volume fraction of γ‐fiber than hot‐rolled samples. With the increasing of annealing temperature and time, the magnetic induction and iron loss of normalized samples decrease. Furthermore, the final sheets normalized at 940 °C have the best magnetic properties. During final high temperature annealing, the non γ‐fiber oriented grains show a higher growth ability than γ‐fiber oriented grains.