Effects of alloying elements and annealing process on coercivity of electromagnetic iron

doi:10.13251/j.issn.0254-6051.2020.01.026

Abstract

Abstract: In order to make the electromagnetic pure iron obtain lower coerce force, the influence of alloying elements and annealing process on coercitive force of electromagnetic pure iron was studied by using Thermo-Calc software to calculate phase change temperature, serial temperature annealing, optical microstructure observation and analysis, dc magnetic property detection and other methods. The results show that the addition of 1.4%Si and 1.0%Mn can reduce the coercibility value of electromagnetic pure iron, while the continuous increase of the content of Si and Mn will deteriorate the magnetism and the coercibility will increase. The addition of 0.1%P has almost no effect on the coercibility. When the transformation temperature of pure iron is A ₁ (880 ℃), the coercivity is the lowest when annealing at A ₁ -10 ℃. When there is no phase change temperature, the coercivity is lowest at high temperature (1100-1200 ℃). H _c value (16.85 A/m) is the lowest after annealing at 1100 ℃ with 1.4%Si of pure electromagnetic iron, which meets the coercive force requirements of super-pure electromagnetic iron DT4C.

Key words: alloying elements, annealing process, temperature, average grain size, coercivity

CLC Number:

TG156

Duan Meiqi, Wang Ruizhen, Cao Jianchun, Cai Mengru, Ge Xin. Effects of alloying elements and annealing process on coercivity of electromagnetic iron[J]. HTM, 2020, 45(1): 130-134.

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