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<p>Model calculations and laboratory experiments were conducted to investigate the influence of surface tension of the molten steel on the agglomeration trend of Al<sub>2</sub>O<sub>3</sub> inclusions. The agglomeration trends of inclusions were compared using the calculated attractiveness. When the S content in the steel increased from 2.7 × 10<sup>–6</sup> to 789 × 10<sup>–6</sup>, the surface tension of the molten steel decreased from 1.91 to 1.39 N/m, while the attractive force between inclusions increased from 5 × 10<sup>−18</sup> to 5 × 10<sup>−16</sup> N, and the critical collision distance of Al<sub>2</sub>O<sub>3</sub> inclusions gradually increased from 30 to 70&#xa0;μm. A model of the relationship between the capillary force of inclusions and S content in steel was established. It was found that the capillary force calculated by the model showed the same trend as the attractive force obtained from experiments, and an increase in the S content promoted the attraction between inclusions.</p>

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Influence of surface tension on collision of inclusions on surface of molten steel

  • 期刊论文

  • 发表日期：

    2025年8月31日

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  • Ming-hui Wu,
  • Li-mei Cheng,
  • Ying Ren,
  • Li-feng Zhang

摘要

Model calculations and laboratory experiments were conducted to investigate the influence of surface tension of the molten steel on the agglomeration trend of Al2O3 inclusions. The agglomeration trends of inclusions were compared using the calculated attractiveness. When the S content in the steel increased from 2.7 × 10–6 to 789 × 10–6, the surface tension of the molten steel decreased from 1.91 to 1.39 N/m, while the attractive force between inclusions increased from 5 × 10−18 to 5 × 10−16 N, and the critical collision distance of Al2O3 inclusions gradually increased from 30 to 70 μm. A model of the relationship between the capillary force of inclusions and S content in steel was established. It was found that the capillary force calculated by the model showed the same trend as the attractive force obtained from experiments, and an increase in the S content promoted the attraction between inclusions.