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.
吕斌, 李志强, 杨智勇, 刘小龙, 李卫京, 韩建民. 电渣重熔工艺对GCr15轴承钢凝固组织的影响[J]. 材料导报, 2021, 35(24): 24134-24141.
LYU Bin, LI Zhiqiang, YANG Zhiyong, LIU Xiaolong, LI Weijing, HAN Jianmin. Effect of ESR Process on the Solidification Structure of GCr15 Bearing Steel. Materials Reports, 2021, 35(24): 24134-24141.
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2021, Vol. 35 
