Carbide dissolution behavior in GCr15 bearing steel during spheroidization annealing under condition of electromagnetic energy

doi:10.13251/j.issn.0254-6051.2022.08.006

Abstract

Abstract: Retained carbide dissolution behavior of the GCr15 bearing steel during holding stage of two-phase zone spheroidization annealing was investigated under traditional heat filed treatment and controllable pulse electromagnetic energy treatment. The morphology of retained carbide under different heat treatments was observed by means of scanning electron microscope. The results show that pulse electromagnetic energy has a great effect on shortening holding time of two-phase zone spheroidization annealing and reduces the number of retained carbide per unit area from 2.6460 μm^-2(traditional heat field spheroidization annealed for 60 min)to 0.7839 μm^-2(electromagnetic energy spheroidization annealed for 60 min). The kinetic analysis indicates that the applied magnetic field makes the G_tot decrease, and the growth rate of austenite increase, improves the dissolution of carbides, and reduces the spheroidization annealing time.

Key words: GCr15 bearing steel, controllable pulse electromagnetic energy, spheroidization annealing, carbide

CLC Number:

TH142.1

Shen Lijuan, Xie Gangsheng, Ma Yonglin, Xing Shuqing. Carbide dissolution behavior in GCr15 bearing steel during spheroidization annealing under condition of electromagnetic energy[J]. Heat Treatment of Metals, 2022, 47(8): 40-45.

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