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<p>In order to reduce the central deformation degree of thick Q345R steel plates used in pressure vessels, the influence of differential temperature rolling on the thickness-direction deformation of the steel plates was studied. Based on the ANSYS finite element software, a rolling model of differential temperature and the combined effect of differential temperature asymmetry was established. The spatial distribution of the temperature field and the impact of key process parameters on deformation uniformity and head warping were rigorously analyzed. The results indicate that, for 50-mm-thick plates, an elevated heat transfer coefficient or prolonged cooling duration increases the central strain by 67.85% and 68.08%, respectively. A Linear temperature gradient exerts a significantly stronger influence on deformation than a polynomial profile, yielding curvature and head-warp magnitudes 4.1- and 4.3-fold higher, respectively. Furthermore, differential temperature rolling effectively suppresses head warping induced by asymmetrical rolling, achieving an 85.67% reduction in maximum curvature.</p>

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The Effect of Differential Temperature Rolling on the Deformation of Large Thickness Q345R Steel Plate for Pressure Vessel

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Suwen Chen,
  • Hangyu Xu,
  • Wenjie Ding,
  • Jianliang Sun,
  • Yunfei Liu

摘要

In order to reduce the central deformation degree of thick Q345R steel plates used in pressure vessels, the influence of differential temperature rolling on the thickness-direction deformation of the steel plates was studied. Based on the ANSYS finite element software, a rolling model of differential temperature and the combined effect of differential temperature asymmetry was established. The spatial distribution of the temperature field and the impact of key process parameters on deformation uniformity and head warping were rigorously analyzed. The results indicate that, for 50-mm-thick plates, an elevated heat transfer coefficient or prolonged cooling duration increases the central strain by 67.85% and 68.08%, respectively. A Linear temperature gradient exerts a significantly stronger influence on deformation than a polynomial profile, yielding curvature and head-warp magnitudes 4.1- and 4.3-fold higher, respectively. Furthermore, differential temperature rolling effectively suppresses head warping induced by asymmetrical rolling, achieving an 85.67% reduction in maximum curvature.