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<p>The prepared Fe-Si + CaO composite powder cored wire was fed into the molten steel to investigate the effects on the inclusion removal behaviors. The results indicate that the composite powder cored wire can be injected into the molten steel, in which the composite powder can diffuse into the molten steel and form Si-Ca-Al composite inclusions in molten steel. The composite inclusion is spherical, which is easy to accumulate and float up. The industrial trial results show that the composite powder cored wire can contribute to removing inclusions and purifying the molten steel without the element pick-up of the steel composition. The total oxygen content, inclusion area, and number density are decreased significantly, and the sizes of inclusions remaining in the slab are mostly less than 4&#xa0;μm, with no size larger than 10&#xa0;μm inclusions.</p>

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Investigation on Inclusion Removal Behavior via Feeding a Novel Fe-Si + (CaCO3 + CaO) Composite Powder Cored Wire

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • X. F. Wang,
  • Fei Ding,
  • Y. J. Zhang,
  • W Kang,
  • H. Li

摘要

The prepared Fe-Si + CaO composite powder cored wire was fed into the molten steel to investigate the effects on the inclusion removal behaviors. The results indicate that the composite powder cored wire can be injected into the molten steel, in which the composite powder can diffuse into the molten steel and form Si-Ca-Al composite inclusions in molten steel. The composite inclusion is spherical, which is easy to accumulate and float up. The industrial trial results show that the composite powder cored wire can contribute to removing inclusions and purifying the molten steel without the element pick-up of the steel composition. The total oxygen content, inclusion area, and number density are decreased significantly, and the sizes of inclusions remaining in the slab are mostly less than 4 μm, with no size larger than 10 μm inclusions.