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<p>Through a computational fluid dynamics dual-path heat source model, the slag thermal contribution in submerged arc welding is decoupled from hydrodynamic effects. Increasing slag thermal efficiency redistributes heat laterally. This broadens the surface high-temperature region and enhances weld width, leaving penetration depth unaffected due to invariant internal flows. In contrast to momentum-driven factors that dictate penetration, isolating this distinct thermal role provides a theoretical basis for synergistic flux design.</p>

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Influence of Slag Thermal Efficiency Upon Energy Redistribution and Weld Geometry in Submerged Arc Welding

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Hangyu Bai,
  • Yanyun Zhang,
  • Xiaoxi Song,
  • Cong Wang

摘要

Through a computational fluid dynamics dual-path heat source model, the slag thermal contribution in submerged arc welding is decoupled from hydrodynamic effects. Increasing slag thermal efficiency redistributes heat laterally. This broadens the surface high-temperature region and enhances weld width, leaving penetration depth unaffected due to invariant internal flows. In contrast to momentum-driven factors that dictate penetration, isolating this distinct thermal role provides a theoretical basis for synergistic flux design.