热轧高强带钢纵切后侧弯缺陷及其内应力重分布

doi:10.3901/JME.2020.18.043

机械工程学报 ›› 2020, Vol. 56 ›› Issue (18): 43-50.doi: 10.3901/JME.2020.18.043

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热轧高强带钢纵切后侧弯缺陷及其内应力重分布

周兵营^1,2, 邵健^1,2, 何安瑞^1,2, 司小明³, 崔宇轩³, 闻成才³

1. 北京科技大学工程技术研究院北京 100083;
2. 北京科技大学高效轧制国家工程研究中心北京 100083;
3. 马鞍山钢铁股份有限公司第四钢轧总厂马鞍山 243000

收稿日期:2019-09-25 修回日期:2020-01-07 出版日期:2020-09-20 发布日期:2020-11-17
通讯作者: 邵健(通信作者),男,1980年出生,博士,副研究员,硕士研究生导师。主要研究方向为板带轧机高精度板形质量控制。E-mail:jianshao@ustb.edu.cn
作者简介:周兵营,男,1994年出生。主要研究方向为有限元建模与仿真。E-mail:s20171259@xs.ustb.edu.cn
基金资助:
国家自然科学基金（51674028）和创新方法工作专项（2016IM010300）资助项目。

Lateral Bending and Stress Redistribution of High Strength Steel Strip after Longitudinal Slitting

ZHOU Bingying^1,2, SHAO Jian^1,2, HE Anrui^1,2, SI Xiaoming³, CUI Yuxuan³, WEN Chengcai³

1. Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083;
2. National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083;
3. Fourth Steel Rolling Plant of Maanshan Iron and Steel Co., Ltd., Maanshan 243000

Received:2019-09-25 Revised:2020-01-07 Online:2020-09-20 Published:2020-11-17

摘要/Abstract

摘要： 控轧控冷技术已经普遍应用于高强钢的生产过程当中。由于细晶强化的需求，高强钢冷却速率快，横向温度的不均和冷却不同步明显，使得轧制和冷却过程中沿带钢横向分布的内应力差异控制难度大，在后续的纵切分条过程中易导致侧弯缺陷，这是高强钢生产中存在的共性难题。利用有限元软件ABAQUS结合FORTRAN子程序，建立热轧高强带钢纵切过程的有限元模型，并通过解析模型进行反向验证，研究带钢纵切后侧弯缺陷及其内应力重分布。结果表明，纵切后各分条侧弯与带钢内应力重分布紧密相关，纵切打破带钢初始内应力的平衡状态，各分条内应力重新分布并达到二次平衡状态，同时产生侧弯缺陷。结合研究结论，对某热轧厂高强钢平整过程进行工艺优化，解决了汽车大梁钢M510L纵切后第一、第四分条向外侧弯问题，验证了研究过程和结果的正确性。针对带钢纵切过程中内应力重分布的研究，可为今后纵切缺陷的预防提供理论指导。

关键词: 高强带钢, 纵切, 侧弯, 应力重分布, 有限元

Abstract: TMCP has been widely used in the production of high strength steel. Due to the demand for fine grain strengthening, high strength steel strip's fast cooling rate, uneven lateral temperature and unsynchronized cooling, make the control of the internal stress along the transverse during rolling and cooling difficult, and it is easy to cause lateral bending defect after longitudinal slitting, which is a common problem in the production of high strength steel strip. A finite element model is established by ABAQUS combined with FORTRAN subroutine, which is verified by analytical model. The results show that the relationship between the lateral bending and the stress redistribution after longitudinal slitting is closely related. The lo ngitudinal slitting breaks the equilibrium of the initial stress of the strip, and the stress redistributes and reaches the second equilibrium. Combined with the research conclusions, the process optimization of high strength steel levelling in rolling mill is applied, and the outer lateral bending defect of the first and fourth strips of the M510L is well solved, further verifying the validity of the rese arch process and results. The research on the stress redistribution during longitudinal slitting provides theoretical guidance for the prevention of slitting defects.

Key words: high strength steel strip, longitudinal slitting, lateral bending, stress redistribution, finite element method

中图分类号:

TG335

周兵营, 邵健, 何安瑞, 司小明, 崔宇轩, 闻成才. 热轧高强带钢纵切后侧弯缺陷及其内应力重分布[J]. 机械工程学报, 2020, 56(18): 43-50.

ZHOU Bingying, SHAO Jian, HE Anrui, SI Xiaoming, CUI Yuxuan, WEN Chengcai. Lateral Bending and Stress Redistribution of High Strength Steel Strip after Longitudinal Slitting[J]. Journal of Mechanical Engineering, 2020, 56(18): 43-50.

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热轧高强带钢纵切后侧弯缺陷及其内应力重分布

Lateral Bending and Stress Redistribution of High Strength Steel Strip after Longitudinal Slitting

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