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<p>Based on a self-developed mold axial self-rotation bifilar electroslag remelting system, the regulatory mechanisms of mold axial rotation on the solidification quality of M2 high-speed steel ingots were systematically investigated. Through comprehensive metallographic microscopy, metal original position analysis, and numerical simulation, the relationships between axial self-rotation rate and secondary dendrite morphology evolution and elemental segregation characteristics were revealed. The results demonstrated that axial self-rotation of mold significantly improves the metallurgical performance of the electroslag remelting process by enhancing heat transfer, but its effectiveness exhibits a nonlinear variation pattern with axial self-rotation rate. Increasing axial self-rotation rate effectively reduces metal pool depth and refines secondary dendritic structures (exhibiting a 18.18% decrease in dendritic arm spacing at 19&#xa0;r/min compared to static conditions). However, exceeding the 13&#xa0;r/min threshold induces qualitative transformation in melt flow patterns: below 13 r/min, mechanical stirring predominates in homogenizing slag pool temperature field, promoting uniform element distribution and enhancing compactness. At higher rotation rate (19&#xa0;r/min), turbulent sorting effects destabilize solidification fronts, triggering dendrite fragmentation and localized solute aggregation that exacerbate elemental segregation while reducing compactness.</p>

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Solidification process of high-speed tool steel based on axial self-rotation of electroslag mold

  • 期刊论文

  • 发表日期：

    2026年1月23日

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  • Xiao-Fang Shi,
  • Shou-Yin Min,
  • Shu-Hao Mei,
  • Ye-Liang He,
  • Li-Zhong Chang

摘要

Based on a self-developed mold axial self-rotation bifilar electroslag remelting system, the regulatory mechanisms of mold axial rotation on the solidification quality of M2 high-speed steel ingots were systematically investigated. Through comprehensive metallographic microscopy, metal original position analysis, and numerical simulation, the relationships between axial self-rotation rate and secondary dendrite morphology evolution and elemental segregation characteristics were revealed. The results demonstrated that axial self-rotation of mold significantly improves the metallurgical performance of the electroslag remelting process by enhancing heat transfer, but its effectiveness exhibits a nonlinear variation pattern with axial self-rotation rate. Increasing axial self-rotation rate effectively reduces metal pool depth and refines secondary dendritic structures (exhibiting a 18.18% decrease in dendritic arm spacing at 19 r/min compared to static conditions). However, exceeding the 13 r/min threshold induces qualitative transformation in melt flow patterns: below 13 r/min, mechanical stirring predominates in homogenizing slag pool temperature field, promoting uniform element distribution and enhancing compactness. At higher rotation rate (19 r/min), turbulent sorting effects destabilize solidification fronts, triggering dendrite fragmentation and localized solute aggregation that exacerbate elemental segregation while reducing compactness.