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Microstructure Simulation of the Nonuniform Shell for the Round Billet Continuous Casting

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Abstract

To study the effect of nonuniform heat transfer on the grain structure of shells in molds, a micro and macroscopic model coupling heat transfer with dendritic growth was established based on the measured heat flux. Dendritic growth was modeled by using a cellular automaton technique and by considering solutal transport. The quasi-instantaneous nucleation model was introduced to address heterogeneous nucleation, which might occur at the mold wall and in the bulk of the liquid. The temperature field of the billet under the measured heat flux in the mold was calculated, and the initial solidification process and grain structure evolution of four domains at different angles from the inner arc were simulated. The effect of circumferential nonuniform heat transfer on the grain structure of the chill zone and columnar grains of the shell was discussed in detail. The relationship between the distribution of the primary dendrite spacings in different domains and locally measured heat flux was analyzed.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (51974056/51474047/51704073); the Fundamental Research Funds for the Central Universities and the Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) are also gratefully acknowledged. Part of this work was performed using computational resources from Supercomputing Center of Dalian University of Technology.

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, China

    JingJing Wei, XuDong Wang, LaiQiang Cai & Man Yao

  2. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), Dalian, 116024, Liaoning, China

    JingJing Wei, XuDong Wang, LaiQiang Cai & Man Yao

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  1. JingJing Wei
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  2. XuDong Wang
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  3. LaiQiang Cai
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  4. Man Yao
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Correspondence to XuDong Wang.

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Manuscript submitted July 31, 2021; accepted October 22, 2021.

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Wei, J., Wang, X., Cai, L. et al. Microstructure Simulation of the Nonuniform Shell for the Round Billet Continuous Casting. Metall Mater Trans B 53, 273–283 (2022). https://doi.org/10.1007/s11663-021-02364-7

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  • DOI: https://doi.org/10.1007/s11663-021-02364-7

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