外磁场对改进型电渣重熔制备复合轧辊工艺的影响

侯志文; 董艳伍; 姜周华; 胡志豪; 刘礼猛; 田坤杰

doi:10.1007/s12613-021-2277-3

Volume 29 Issue 8

Aug. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(8): 1511-1521

Zhiwen Hou, Yanwu Dong, Zhouhua Jiang, Zhihao Hu, Limeng Liu, and Kunjie Tian, Effect of an external magnetic field on improved electroslag remelting cladding process, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1511-1521. https://doi.org/10.1007/s12613-021-2277-3

Cite this article as:

Zhiwen Hou, Yanwu Dong, Zhouhua Jiang, Zhihao Hu, Limeng Liu, and Kunjie Tian, Effect of an external magnetic field on improved electroslag remelting cladding process, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1511-1521. https://doi.org/10.1007/s12613-021-2277-3

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研究论文封面文章

外磁场对改进型电渣重熔制备复合轧辊工艺的影响

1)
东北大学冶金学院, 沈阳 110819
2)
东北大学轧制技术及连轧自动化国家重点实验室, 沈阳 110819

通讯作者:
董艳伍 E-mail: dongyw@smm.neu.edu.cn

文章亮点

(1)揭示了棒状电极电渣重熔制备复合轧辊工艺温度场非均匀的原因。

(2)阐明了外磁场对棒状电极电渣重熔制备复合轧辊工艺多物理场的作用机理。

(3)分析了环形电流对外磁场强度、流动及界面温度的影响规律。

中文摘要

界面温度周向均匀性对复合轧辊的界面结合质量至关重要。本文提出一种施加外磁场的改进型电渣重熔制备复合轧辊工艺以改善复合轧辊界面结合质量的周向均匀性，该工艺包含基于导电结晶器的传统电渣重熔制备复合轧辊供电回路和外线圈供电回路。提出了包含多物理场的全面3D模型以研究外磁场对多物理场和界面温度均匀性的影响规律。模拟结果表明非均匀的焦耳热场和流场是传统电渣重熔制备的复合轧辊界面不均匀的根本原因。因此，在改进型电渣重熔制备复合轧辊工艺中，外线圈内逆时针方向的电流产生了沿z轴方向的磁场感应强度 B _coil，该轴向 B _coil与渣池内径向电流共同产生旋转电磁力。旋转电磁力推动渣池进行旋转流动，改善了渣池的有效热导率的周向均匀性，最终温度场和界面温度的周向均匀性得到显著改善。此外，物理模型的模拟结果与实验结果具有良好的一致性，证实了改进型工业电渣重熔制备复合轧辊模型的准确性。因此，改进型工艺十分适合工业生产界面结合质量均匀的复合轧辊。

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Research Article

Effect of an external magnetic field on improved electroslag remelting cladding process

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Abstract

Abstract

Obtaining a uniform interface temperature field plays a crucial role in the interface bonding quality of bimetal compound rolls. Therefore, this study proposes an improved electroslag remelting cladding (ESRC) process using an external magnetic field to improve the uniformity of the interface temperature of compound rolls. The improved ESRC comprises a conventional ESRC circuit and an external coil circuit. A comprehensive 3D model, including multi-physics fields, is proposed to study the effect of external magnetic fields on the multi-physics fields and interface temperature uniformity. The simulated results demonstrate that the non-uniform Joule heat and flow fields cause a non-uniform interface temperature in the conventional ESRC. As for the improved ESRC, the magnetic flux density ( B _coil) along the z-axis is produced by an anticlockwise current of the external coil. The rotating Lorentz force is generated from the interaction between the radial current and axial B _coil. Therefore, the slag pool flows clockwise, which enhances circumferential effective thermal conductivity. As a result, the uniformity of the temperature field and interface temperature improve. In addition, the magnetic flux density and rotational speed of the simulated results are in good agreement with those of the experimental results, which verifies the accuracy of the improved ESRC model. Therefore, an improved ESRC is efficient for industrial production of the compound roll with a uniform interface bonding quality.
- improved ESRC;
- external magnetic field;
- multi-physics fields;
- rotating Lorentz force;
- interface temperature uniformity

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