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<p>Active elements improve coating performance by altering the surface tension characteristics of the molten pool. However, relying solely on the regulation of active elements to control the flow of the molten pool has limitations. Therefore, introducing an alternating magnetic field provides a new solution to this problem. In this paper, a numerical model for the iron-60 laser cladding process assisted by an alternating magnetic field was established. The influence of the surface tension and electromagnetic force of the molten pool under the S element on the molten pool was considered. Comparative analysis was conducted on the effects of different magnetic induction intensities and different S element contents on the temperature field and flow field of the laser cladding process. The results show that at 50&#xa0;Hz and 60&#xa0;mT magnetic field, the equilibrium temperature of the molten pool is negatively correlated with the S element content, while the melt flow velocity increases by 6.42% with the increase of S element content. When the S element content remains constant, the magnetic induction intensity and the molten pool temperature exhibit a significant positive correlation, and the convective velocity of the melt, driven by the Lorentz force, increases with the enhancement of the magnetic field. The S element regulates the flow of the molten pool by changing the surface tension, while the alternating magnetic field affects the flow of the molten pool through magnetic stirring. This study provides a theoretical basis for revealing the multifield coupling mechanism of the alternating magnetic field and the S element-containing molten pool.</p>

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Study on Multifield Coupling in the Process of Laser Cladding of Fe60 with Active Elements Assisted by Alternating Magnetic Field

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Jiabo Liu,
  • Chang Li,
  • Yuhao Wang,
  • Shuchao Li,
  • Xing Han

摘要

Active elements improve coating performance by altering the surface tension characteristics of the molten pool. However, relying solely on the regulation of active elements to control the flow of the molten pool has limitations. Therefore, introducing an alternating magnetic field provides a new solution to this problem. In this paper, a numerical model for the iron-60 laser cladding process assisted by an alternating magnetic field was established. The influence of the surface tension and electromagnetic force of the molten pool under the S element on the molten pool was considered. Comparative analysis was conducted on the effects of different magnetic induction intensities and different S element contents on the temperature field and flow field of the laser cladding process. The results show that at 50 Hz and 60 mT magnetic field, the equilibrium temperature of the molten pool is negatively correlated with the S element content, while the melt flow velocity increases by 6.42% with the increase of S element content. When the S element content remains constant, the magnetic induction intensity and the molten pool temperature exhibit a significant positive correlation, and the convective velocity of the melt, driven by the Lorentz force, increases with the enhancement of the magnetic field. The S element regulates the flow of the molten pool by changing the surface tension, while the alternating magnetic field affects the flow of the molten pool through magnetic stirring. This study provides a theoretical basis for revealing the multifield coupling mechanism of the alternating magnetic field and the S element-containing molten pool.