Numerical simulation of vacuum centrifugal casting Incoloy825 alloy pipe

Xiaodong DU, Wei YU, Xue YANG, Haojie WANG, Guohuai LIU, Zhaodong WANG

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (6) : 117-125. DOI: 10.11868/j.issn.1001-4381.2023.000265
RESEARCH ARTICLE

Numerical simulation of vacuum centrifugal casting Incoloy825 alloy pipe

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Abstract

To investigate the solidification behavior and microstructure characteristics of Incoloy825 alloy pipe by using the vacuum centrifugal casting （VCC） process， a simulation model of VCC is established using ProCAST software to simulate and calculate the filling and solidification process of the alloy. The results show that the metal liquid exhibits good forming effects at pouring temperatures between 1480 ℃ and 1520 ℃. When the mold rotation speed exceeds 800 r/min， the metal liquid can be uniformly distributed along the mold wall. The pouring temperature above 1480 ℃ reduces the shrinkage rate to 0%-1.33%. At the pouring temperature of 1520 ℃ and the mold rotation speed of 800 r/min， the initial solidification time for the lower， middle， and upper parts of the casting is 9.61， 12.53 s， and 14.32 s， respectively. Based on the simulation results， optimal process parameters are determined and casting experiments are conducted. Microstructure analysis of the castings reveals that the average length of dendrites from the center to the outer layer of the casting gradually decreases from 271 μm to 121 μm， indicating a significant grain size gradient along the cooling direction of the microstructure.

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vacuum centrifugal casting / Incoloy825 / numerical simulation / filling process / as-cast structure / free dendrite

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Xiaodong DU , Wei YU , Xue YANG , et al . Numerical simulation of vacuum centrifugal casting Incoloy825 alloy pipe. Journal of Materials Engineering. 2025, 53(6): 117-125 https://doi.org/10.11868/j.issn.1001-4381.2023.000265

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