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Generation mechanism of quarter buckle in hot-rolled temper rolling
Journal of Iron and Steel Research International ( IF 2.5 ) Pub Date : 2022-04-12 , DOI: 10.1007/s42243-022-00762-y
Hui Li , Guan-yu Zhou , An-rui He , Zhi-hong Zhang , Chi-huan Yao , Chao Liu , Jian-wei Zhao , Wei-gang Li , Jian Shao

To reveal the generation mechanism of the quarter buckle in the process of hot-rolled temper rolling, the elastic–plastic finite element method is used to calculate the deformation of the roll and the strip during the temper rolling. The change of the cross section of the strip and the distribution of the longitudinal stress are analysed under different bending forces to obtain the boundary conditions of the quarter buckle. The generation of the quarter buckle is further analysed from the bending and contact flattening of the roll system and the elastic recovery of the strip after rolling. We found that the quarter buckle is closely related to the high-order distribution of the contact flattening between the work roll and the strip and is less affected by the bending deformation of the roll and the contact flattening between the rolls. Finally, a new work roll contour of the locally variable crown is proposed to change the distribution of contact flattening between the work roll and the strip. It is verified through theoretical calculations and industrial applications that the new contour can effectively improve the quarter buckle.



中文翻译:

热轧平整轧制四分之一扣的产生机理

为揭示热轧平整轧制过程中四分之一弯的产生机理,采用弹塑性有限元法计算平整轧制过程中轧辊和带钢的变形。分析了不同弯曲力下带材截面的变化和纵向应力分布,得到了四分之一扣的边界条件。从轧辊系统的弯曲和接触压扁以及轧制后带钢的弹性恢复等方面进一步分析了四分之一扣的产生。我们发现,四分之一屈曲与工作辊与带钢接触压扁的高阶分布密切相关,受轧辊弯曲变形和辊间接触压扁的影响较小。最后,提出了一种新的局部可变凸度工作辊轮廓,以改变工作辊和带钢之间的接触压扁分布。通过理论计算和工业应用验证,新轮廓可以有效改善四分之一扣。

更新日期:2022-04-12
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