Influence of heating rate of bell annealing process on texture and properties of non-oriented silicon steel

doi:10.13251/j.issn.0254-6051.2022.10.020

Abstract

Abstract: Effect of heating rate on microstructure, texture and magnetic properties of 0.8%Si non-oriented silicon steel during bell annealing process was studied. The results show that after annealing with different heating rates, the recrystallized texture of the non-oriented silicon steel is mainly {111} texture, accompanied by {110} and {100} texture. With the increase of heating rate, the grain size gradually increases, the {111} texture appears to be significantly weakened, the {110} texture appears to increase significantly, and the {100} texture does not change significantly, meanwhile, the iron loss P_1.5/50 gradually decreases, and the magnetic induction intensity B₅₀₀₀ gradually increases. However, when the heating rate is increased from 80 ℃/h to 100 ℃/h, the {111} texture appears to be strengthened to a certain extent, the {110} texture appears to weaken, and the {100} texture does not change obviously, moreover, the iron loss P_1.5/50 increases and the magnetic induction intensity B₅₀₀₀decreases. When the heating rate of bell annealing process is 80 ℃/h, the optimum magnetic properties can be obtained as P_1.5/50=4.249 W/kg, B₅₀₀₀=1.715 T.

Key words: non-oriented silicon steel, heating rate, texture, magnetic properties

CLC Number:

TG142.6

Su Zhihe, Jin Zili, Wu Zhongwang, Cui Yuanlin, Ren Huiping, Zhao Xiaolong, Luo Xiaoyang, Di Yanjun. Influence of heating rate of bell annealing process on texture and properties of non-oriented silicon steel[J]. Heat Treatment of Metals, 2022, 47(10): 124-128.

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