Effect of pulsed magnetic field on precipitation of carbides during spheroidizing annealing of GCr15 steel

doi:10.13251/j.issn.0254-6051.2023.04.019

Abstract

Abstract: Carbide precipitation behavior of the GCr15 bearing steel during the divorced eutectoid transformation process of spheroidizing annealing under single temperature field and magnetic-thermal coupling field was studied. The morphology of carbide precipitated under different conditions was observed by using scanning electron microscope, as well as the hardness was tested by Rockwell hardness tester. The results show that the pulsed magnetic field is beneficial to the formation of carbides during the divorced eutectoid transformation of the GCr15 bearing steel, and the equivalent diameter of the precipitated carbide grows from 0-0.2 μm to 0.6-0.8 μm. Kinetic analysis shows that the magnetic-thermal coupling field promotes the diffusion of carbon atoms and accelerates the precipitation of carbides.

Key words: GCr15 bearing steel, magnetic-thermal coupling field, divorced eutectoid transformation, precipitation of carbides

CLC Number:

TH142.1

Xie Gangsheng, Xing Shuqing, Shen Lijuan, Ma Yonglin, Liu Yongzhen, Chen Zhongyi. Effect of pulsed magnetic field on precipitation of carbides during spheroidizing annealing of GCr15 steel[J]. Heat Treatment of Metals, 2023, 48(4): 118-122.

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