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<p>The control of macrosegregation in large-section continuous casting round blooms has a crucial influence on bloom quality. In this study, the combination of the electromagnetic swirling flow in the nozzle (EMSFN) and the mold electromagnetic stirring (M-EMS) is employed to investigate the effect of macrosegregation control on Φ650mm round blooms, and the coupling mechanism of EMSFN and M-EMS is analyzed through numerical simulation of multi-physical field coupling. The results reveal that for high-carbon XTD10 steel with the cross-section of <i>Φ</i>650 mm, the combined use of EMSFN and M-EMS significantly reduces the degree of carbon segregation, with a maximum reduction rate reaching 86.57&#xa0;pct. Numerical simulation reveals that EMSFN can maintain the stability of the molten steel flow in the mold by reducing its impact depth, thereby allowing newly entered molten steel to accumulate in the mold for better mixing and reducing solute enrichment at meniscus generated by M-EMS. Additionally, EMSFN promotes faster solidification in the secondary cooling zone, inhibits solute diffusion, and effectively reduces macrosegregation levels in round blooms.</p>

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Suppression of Macrosegregation in Round Blooms by Coupling Electromagnetic Swirling Flow in the Nozzle with Mold Electromagnetic Stirring

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Zeyi Liu,
  • Siyuan Zhang,
  • Yanwen Sun,
  • Meijia Sun,
  • Xiaoming Liu,
  • Lijia Zhao,
  • Tie Liu,
  • Qiang Wang

摘要

The control of macrosegregation in large-section continuous casting round blooms has a crucial influence on bloom quality. In this study, the combination of the electromagnetic swirling flow in the nozzle (EMSFN) and the mold electromagnetic stirring (M-EMS) is employed to investigate the effect of macrosegregation control on Φ650mm round blooms, and the coupling mechanism of EMSFN and M-EMS is analyzed through numerical simulation of multi-physical field coupling. The results reveal that for high-carbon XTD10 steel with the cross-section of Φ650 mm, the combined use of EMSFN and M-EMS significantly reduces the degree of carbon segregation, with a maximum reduction rate reaching 86.57 pct. Numerical simulation reveals that EMSFN can maintain the stability of the molten steel flow in the mold by reducing its impact depth, thereby allowing newly entered molten steel to accumulate in the mold for better mixing and reducing solute enrichment at meniscus generated by M-EMS. Additionally, EMSFN promotes faster solidification in the secondary cooling zone, inhibits solute diffusion, and effectively reduces macrosegregation levels in round blooms.