Effect of traveling-wave magnetic field on dendrite growth of high-strength steel slab: Industrial trials and numerical simulation

Cheng Yao; Min Wang; Youjin Ni; Dazhi Wang; Haibo Zhang; Lidong Xing; Jian Gong; Yanping Bao

doi:10.1007/s12613-023-2629-2

Volume 30 Issue 9

Sep. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(9): 1716-1728

Cheng Yao, Min Wang, Youjin Ni, Dazhi Wang, Haibo Zhang, Lidong Xing, Jian Gong, and Yanping Bao, Effect of traveling-wave magnetic field on dendrite growth of high-strength steel slab: Industrial trials and numerical simulation, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1716-1728. https://doi.org/10.1007/s12613-023-2629-2

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Cheng Yao, Min Wang, Youjin Ni, Dazhi Wang, Haibo Zhang, Lidong Xing, Jian Gong, and Yanping Bao, Effect of traveling-wave magnetic field on dendrite growth of high-strength steel slab: Industrial trials and numerical simulation, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1716-1728. https://doi.org/10.1007/s12613-023-2629-2

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Research Article

Effect of traveling-wave magnetic field on dendrite growth of high-strength steel slab: Industrial trials and numerical simulation

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Corresponding author:
Min Wang E-mail: wangmin@ustb.edu.cn
Received: 9 January 2023; Revised: 11 March 2023; Accepted: 13 March 2023; Available online: 14 March 2023

Abstract

Abstract

The dendrite growth behavior of high-strength steel during slab continuous casting with a traveling-wave magnetic field was studied in this paper. The morphology of the solidification structure and composition distribution were analyzed. Results showed that the columnar crystals could deflect and break when the traveling-wave magnetic field had low current intensity. With the increase in current intensity, the secondary dendrite arm spacing and solute permeability decreased, and the columnar crystal transformed into an equiaxed crystal. The electromagnetic force caused by the traveling-wave magnetic field changed the temperature gradient and velocity magnitude and promoted the breaking and fusing of dendrites. Dendrite compactness and composition uniformity were arranged in descending order as follows: columnar-to-equiaxed transition (high current intensity), columnar crystal zone (low current intensity), columnar-to-equiaxed transition (low current intensity), and equiaxed crystal zone (high current intensity). Verified numerical simulation results combined with the boundary layer theory of solidification front and dendrite breaking–fusing model revealed the dendrite deflection mechanism and growth process. When thermal stress is not considered, and no narrow segment can be found in the dendrite, the velocity magnitude on the solidification front of liquid steel can reach up to 0.041 m/s before the dendrites break.
- high-strength steel;
- traveling-wave magnetic field;
- dendrite growth;
- numerical simulation

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