Investigation on the primary and secondary recrystallization textures of rare earth micro-alloyed grain-oriented silicon steel

Abstract

The primary and secondary recrystallization textures of rare earth micro-alloyed grain-oriented electrical steel was examined by using electron backscattered diffraction (EBSD) techniques. The results show that the primary recrystallization texture comprises {111} < 112 >, {111}<110 >, {411}<148>, and {012} < 001> components. The benefiting texture components of primary recrystallization increase with increasing rare earth addition after decarburizing annealing. During secondary recrystallization, the proportion of Σ9 boundaries are reduced. The sample containing 5ppm rare earth starts secondary recrystallization at 900°C, and the sample containing of 17ppm rare earth starts secondary recrystallization at 950°. The addition of rare earth can delay the process of secondary recrystallization.