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<p>CaF<sub>2</sub>–MnO–CaO–SiO<sub>2</sub> fluxes with varying CaO/SiO<sub>2</sub> ratios are designed and employed in submerged arc welding of EH36 shipbuilding steel. As the CaO/SiO<sub>2</sub> ratio enhances, the fraction of Al–Mn–Si–O inclusions increases at the expense of Al–Mn–Si–Ti–O inclusions. Meanwhile, the number density and average size of inclusions decrease from 5564 to 4491 mm<sup>−2</sup> and from 0.727 to 0.612 <i>μ</i>m, respectively. Such phenomenon demonstrates that the CaO/SiO<sub>2</sub> ratio is a critical parameter for controlling inclusion features.</p>

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Role of CaO/SiO2 Ratio Upon Inclusion Characteristics of EH36 Shipbuilding Steel Treated by CaF2–MnO–CaO–SiO2 Fluxes

  • 期刊论文

  • 发表日期：

    2025年10月25日

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  • Zimeng Wang,
  • Ming Zhong,
  • Imants Kaldre,
  • Ishwar Kapoor,
  • Cong Wang

摘要

CaF2–MnO–CaO–SiO2 fluxes with varying CaO/SiO2 ratios are designed and employed in submerged arc welding of EH36 shipbuilding steel. As the CaO/SiO2 ratio enhances, the fraction of Al–Mn–Si–O inclusions increases at the expense of Al–Mn–Si–Ti–O inclusions. Meanwhile, the number density and average size of inclusions decrease from 5564 to 4491 mm−2 and from 0.727 to 0.612 μm, respectively. Such phenomenon demonstrates that the CaO/SiO2 ratio is a critical parameter for controlling inclusion features.