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<p>Electromagnetic stirring (EMS) has become one of the main methods for producing semi-solid slurries. However, the observation of aluminum alloy melt during EMS preparation and the influence of fluid flow are not yet well understood. By combining numerical simulations with verification experiments, a three-dimensional simulation model coupled with multiple physical fields was constructed and combined with experiments to investigate the influence of EMS input parameters on the liquid level fluctuation and defects of semi-solid melt. In research, the degree of liquid level fluctuation increases as the input current and frequency increase, resulting in the formation of a liquid hole on the melt surface. By increasing the input current, the number of vortex zones in the molten metal is reduced and air entrainment defects are effectively mitigated. The input frequency’s effect on vortex distribution is less pronounced, but at 10 Hz, the vortex area is more extensive, with more compact streamlines, indicating a higher risk of air entrainment defects. In addition, higher current and frequency can achieve a more uniform temperature distribution, which contributes to the reduction of temperature defects.</p>

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Effect of Process Parameters on the Liquid Level Fluctuation and Defects of Semi-Solid A356 Aluminum Alloy Melt Prepared by Electromagnetic Stirring Method

  • 期刊论文

  • 发表日期：

    2025年4月23日

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  • Hao Luo,
  • Xun Zhang,
  • Ye Wang,
  • Kaijiao Kang,
  • Zhaoxue Deng,
  • Jiaoyue Liu

摘要

Electromagnetic stirring (EMS) has become one of the main methods for producing semi-solid slurries. However, the observation of aluminum alloy melt during EMS preparation and the influence of fluid flow are not yet well understood. By combining numerical simulations with verification experiments, a three-dimensional simulation model coupled with multiple physical fields was constructed and combined with experiments to investigate the influence of EMS input parameters on the liquid level fluctuation and defects of semi-solid melt. In research, the degree of liquid level fluctuation increases as the input current and frequency increase, resulting in the formation of a liquid hole on the melt surface. By increasing the input current, the number of vortex zones in the molten metal is reduced and air entrainment defects are effectively mitigated. The input frequency’s effect on vortex distribution is less pronounced, but at 10 Hz, the vortex area is more extensive, with more compact streamlines, indicating a higher risk of air entrainment defects. In addition, higher current and frequency can achieve a more uniform temperature distribution, which contributes to the reduction of temperature defects.