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<p>To study the potential influence of the dynamic stopper rod adjustment on slab surface oscillation mark formation in continuous casting, a coupled molten steel solidification model that incorporates both stopper rod and mold vibrations was established, and the model was validated using industrial experiments. Analysis of molten steel flow, liquid level fluctuations, and thermal–mechanical coupling reveals the coupled mechanism governing oscillation mark evolution under stopper rod vibration. Results indicate that increasing vibration amplitude deepens marks by 21.51%. When the stopper rod vibration frequency equals twice the mold frequency, it induces resonance and deepens oscillation marks. An 180° phase difference between the stopper rod and mold reduces mark depth by 9.7% compared with in-phase operation. Based on these findings, an effective vibration control strategy is proposed, emphasizing low vibration amplitude, avoidance of mold twice frequencies, and antiphase operation relative to mold motion. This strategy suppresses liquid level fluctuations, reduces oscillation mark depth, and improves slab quality.</p>

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Effect of stopper rod vibration on oscillation mark depth in continuous casting

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Zong-Qing Yan,
  • Shen Wang,
  • Xiao-Qiang Yan,
  • Peng Lan,
  • Chen Duan,
  • Yu Chen

摘要

To study the potential influence of the dynamic stopper rod adjustment on slab surface oscillation mark formation in continuous casting, a coupled molten steel solidification model that incorporates both stopper rod and mold vibrations was established, and the model was validated using industrial experiments. Analysis of molten steel flow, liquid level fluctuations, and thermal–mechanical coupling reveals the coupled mechanism governing oscillation mark evolution under stopper rod vibration. Results indicate that increasing vibration amplitude deepens marks by 21.51%. When the stopper rod vibration frequency equals twice the mold frequency, it induces resonance and deepens oscillation marks. An 180° phase difference between the stopper rod and mold reduces mark depth by 9.7% compared with in-phase operation. Based on these findings, an effective vibration control strategy is proposed, emphasizing low vibration amplitude, avoidance of mold twice frequencies, and antiphase operation relative to mold motion. This strategy suppresses liquid level fluctuations, reduces oscillation mark depth, and improves slab quality.