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The International Journal of Advanced Manufacturing Technology

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20-08-2022 | ORIGINAL ARTICLE

Numerical simulation of DC casting of large-size rare earth magnesium alloy ingot under low-frequency electromagnetic field

Authors: Zhongliang Zhou, Yiqiang Yang, Wenchao Duan, Zhiqiang Zhang, Jianzhong Cui

Published in: The International Journal of Advanced Manufacturing Technology | Issue 3-4/2022

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Abstract

For studying the changes of macro-physical field in the casting process of large-scale rare earth magnesium alloy, through the numerical simulation method, a two-dimensional axisymmetric multi-physical field coupling model was established by using the multi-physical simulation software COMSOL Multiphysics. The changes of temperature field, flow field, Lorentz force, and liquid fraction of large-size rare earth magnesium alloy with diameter of 750 mm under different electromagnetic parameters (magnetic field frequency and current intensity) in steady state of direct-chill (DC) casting were studied. The results reveal that using a magnetic field can reduce the temperature gradient and greatly accelerate the melt flow, the depth of the sump is reduced by about 50 mm. As the current intensity rises, the flow rate in the melt becomes accelerated, the sump depth becomes shallower, while the melt area with a liquid fraction of 0.5 to 0.63 increases. The Lorentz force rises as the magnetic field frequency increases, but the skin depth of the magnetic field decreases from 64.9 to 36.4 mm.

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Title: Numerical simulation of DC casting of large-size rare earth magnesium alloy ingot under low-frequency electromagnetic field
Authors: Zhongliang Zhou
Yiqiang Yang
Wenchao Duan
Zhiqiang Zhang
Jianzhong Cui
Publication date: 20-08-2022
Publisher: Springer London
Published in: The International Journal of Advanced Manufacturing Technology / Issue 3-4/2022
Print ISSN: 0268-3768
Electronic ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-022-09891-w

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