Research on quarter-wave control in DP980 steel during cold rolling based on multi-pass simulation
Research on quarter-wave control in DP980 steel during cold rolling based on multi-pass simulation
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DOI：
10.1007/s00170-022-10055-z
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
L. Chen;Wen-quan Sun;A. He;Chaoan Liu;Qiang Yi;Jianwei Zhao;Guanyu Zhou;Tieheng Yuan
中科院分区：
文献类型：
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作者：
L. Chen;Wen-quan Sun;A. He;Chaoan Liu;Qiang Yi;Jianwei Zhao;Guanyu Zhou;Tieheng Yuan
DP980冷轧过程中经常出现四分之一波平直度缺陷，严重影响产品质量。为了找出这种板形缺陷产生的原因，建立了基于2130UCM轧机的多道次有限元模型，并用三种方法验证了模型的准确性。对S3和S4机架的模拟结果表明，当工作辊弯曲力接近正极限值时，可以减小模拟板形与理论板形之间的偏差；随着工作辊弯曲力的减小，带钢四分之一位置的缩减量显著增加。对S5机架在不同轧制力条件下进行了模拟，当接近实际轧制力时，板带塑性变形只存在于中心区效应，不能解决四分之一部位厚度异常的问题。系统分析了S3型机架的单元前向张力、进给型面和弯曲力的控制效果。结果表明，实际设定值会产生四分之一波，提高WRB力有助于减少板形缺陷，但不能消除板形缺陷，这一点得到了实验的验证。为消除板形缺陷，设计了工作辊补偿曲线，实验结果表明，工作辊补偿曲线对四分之一波有明显的控制效果。
Quarter-wave flatness defect often appears in the DP980 cold rolling process, seriously affecting product quality. To find the causes of this kind of flatness defect, a multi-pass finite element model (FEM) based on a 2130 UCM mill was established, and the accuracy of the model was verified by three methods. The simulation results of the S3 and S4 stands show that the deviation between the simulated and theoretical profiles can be reduced when the work roll bending (WRB) force approaches the positive limiting value; as the WRB force decreases, the reduction in the quarter position of the strip increases significantly. The S5 stand is simulated under different rolling force conditions, and when near the real rolling force, the strip plastic deformation exists only in the central area effect, which is unable to solve the abnormal thickness in quarter position. The control effect of unit forward tension, entry profile, and bending force of the S3 stand was analyzed systematically. The results show that the actual setting value will cause a quarter wave, and improving the WRB force is useful to reduce but cannot eliminate the flatness defect, which is verified by experiments. The work roll compensation curve is designed to eliminate the flatness defect, and the experiment results show that the work roll compensation curve has an obvious control effect on the quarter wave.