Recrystallization and inhibitor precipitation behavior in high temperature ferrite zone of oriented silicon steel containing rare earth

doi:10.13251/j.issn.0254-6051.2023.01.013

Abstract

Abstract: Recrystallization and inhibitor precipitation behaviors of oriented silicon steel containg are earth hot rolled at 1200 ℃ in the ferrite zone with 30% deformation, held for different time and then cooled in water were analyzed by using Gleeble 1500D, SEM, TEM, ICP. The results show that after hot rolling at high temperature in the ferrite zone, only dynamic recovery occurs, no dynamic recrystallization occurs, and the amount of precipitated phase in the steel does not increase significantly. After hot rolling and holding for about 20 s, static recrystallization occurs, and the inhibitor precipitated phase starts to precipitate and grows. The higher the recrystallization rate, the faster the volume fraction increasing of precipitated phase. After deformation, the amount of Cu₂S and MnS in the precipitated phase is similar. When the recrystallization rate is 64%, MnS increases by about 7.4% and Cu₂S increases by about 19.34%. At the same time, most of the precipitated phases are precipitated in the grains, and with the prolongation of holding time, the precipitated phase nucleates and grows up gradually on the grain boundaries.

Key words: rare earth, oriented silicon steel, inhibitors, recrystallization

CLC Number:

TG142.1

Hu Shuai, Jin Zili, Wu Zhongwang, Li Tao, Li Wei, Hu Yuqing, Bai Jin. Recrystallization and inhibitor precipitation behavior in high temperature ferrite zone of oriented silicon steel containing rare earth[J]. Heat Treatment of Metals, 2023, 48(1): 75-79.

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