电渣重熔工艺对GCr15轴承钢凝固组织的影响

doi:10.11896/cldb.20060203

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Abstract Based on the CAFE method (Cellular automaton-finite element model), the microstructure of a GCr15 bearing steel ingot produced by the electroslag remelting was simulated by using ProCAST to analyze the grain growth process. The simulation has obtained the shape of the molten pool and the distribution of the crystal region of the electroslag steel ingot, and analyzed the effect of different process parameters on the shape of the molten pool and the solidification microstructure. The depth of the molten pool became deeper and deeper as the solid phase zone of ingot expanded. When the ingot reached a certain height, the depth of the molten pool and the direction of grain growth no longer changed. The results show that the greater the cooling strength of the mold, the lower the temperature of the molten pool and the smaller the ratio of molten pool depth to ingot radius (h/R), and the average grain size increases and the number of columnar crystals increases; the higher the temperature of the slag pool, the larger the value of h/R, the larger the average grain size. The remelting speed is the most significant influencing factor. With the melting speed increasing, the value of h/R increases significantly, and the size and number of columnar crystals are larger. After the solidification structure observation experiment on the ingot, it is found that the simulation results are in good agreement with the experimental results.

Key words： cellular automaton-finite element model (CAFE) electroslag remelting GCr15 bearing steel metal molten pool microstructure

Published: 25 December 2021 Online: 2021-12-27

CLC number:

U270.4+1

About author: Bin Lyustudied for a master's degree in vehicle engineering at Beijing Jiaotong University in 2018. His research direction is mainly on the relationship between casting technology and quality performance of high-speed rail bearing steel.

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	LYU Bin
	LI Zhiqiang
	YANG Zhiyong
	LIU Xiaolong
	LI Weijing
	HAN Jianmin

Cite this article:

LYU Bin,LI Zhiqiang,YANG Zhiyong, et al. Effect of ESR Process on the Solidification Structure of GCr15 Bearing Steel[J]. Materials Reports, 2021, 35(24): 24134-24141.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20060203 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24134

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