基于热-力耦合的粗轧过程头部弯曲规律

doi:10.13228/j.boyuan.issn0449-749x.20220498

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (5445 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Head bending is a common defect in the process of hot rough rolling process. It affects the quality and rolling stability of strip products during the production process seriously. In actual production,due to the asymmetry of the temperature drop on the upper and lower surfaces of the rolled piece and the rolling process parameters,the rolled piece is prone to head bending after rough rolling. In order to realize the modeling description of the head bending law,based on the heat transfer theory and the rigid-plastic variational principle,the thermo-mechanical coupling finite element model is established by ABAQUS. In the case of misalignment of the rolling line,the effect of the temperature distribution of the rolled piece on the head bending,and the effect of roll speed ratio,reduction rate and entry thickness on the head bending under the condition of misalignment of rolling line and temperature difference between upper and lower surfaces of rolled piece were systematically analyzed. Finally,the effect of various process factors on the head bending was obtained by fitting,and the prediction of the head bending was realized. The simulation results show that with the increase of the temperature difference between the upper and lower surfaces,the downward bending of the rolled piece gradually increases;the roll speed ratio,the reduction rate and the entry thickness all have an effect on the head bending,and are coupled with each other;with the increase of the roll speed ratio,the bending angle gradually becomes larger,and the head the rolled piece changes from the downward bending to upward bending;with the increase of the thickness,the head of the rolled piece gradually tends to be straight;with the increase of the reduction rate,the bending angle fluctuates within a certain range. The field measurement data shows that based on the established prediction model,the proportion of the predicted angle deviation within ±5° is 90.10%,which verifies the validity of the established model and achieves accurate prediction of head bending. It can provide a reference for the process optimization of the rough rolling process.

Key words： hot rolling rough rolling thermo-mechanical coupling temperature distribution head bending model prediction

Received: 26 July 2022

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	PENG Wen
	WEN Hong-bo
	LI Xu-dong
	FAN Xing-guo
	SUN Jie
	ZHANG Dian-hua

Cite this article:

PENG Wen,WEN Hong-bo,LI Xu-dong等. Head bending law during rough rolling processbased on thermo-mechanical coupling[J]. Iron and Steel, 2023, 58(1): 116-124.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220498 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I1/116

[1] 李亮,杜凤山,郭振宇,等. 非对称板带热轧头部翘曲的分析与有限元模拟[J]. 冶金设备,2003,25(2):4.(LI Liang,DU Feng-shan,GUO Zhen-yu,et al. Analytical and FEM simulation of the front end bending in asymmetrical hot plate rolling[J]. Metallurgical Equipment,2003,25(2):4.)
[2] 闫晓强,张扶民,单为春,等. 中板轧制过程板坯弯曲生成与抑制之五——轧制线高度及轧辊偏移距对板坯弯曲的影响[J]. 北京科技大学学报,2001(5):463.(YAN Xiao-qiang,ZHANG Fu-min,SHAN Wei-chun,et al. Forming and curbing of plate bending in jobbing sheet rolling process(5)—Rolling line height and offset effecting plate bending[J]. Journal of University of Science and Technology Beijing,2001(5):463.)
[3] 胡衍生,程晓茹,李虎兴,等. 中厚板轧制头部弯曲机理的探讨[J]. 钢铁,2003,38(6):28.(HU Yan-sheng,CHENG Xiao-ru,LI Hu-xing,et al. Discussion on front end bending during plate rolling[J]. Iron and Steel,2003,38(6):28.)
[4] 田勇. 中厚板轧制头部弯曲及其控制的研究[D]. 沈阳:东北大学,2009.(TIAN Yong. Study on Head Warping and Control for Plate Rolling[D]. Shenyang:Northeastern University,2009.)
[5] SUN Ji-quan,ZHANG Hai-bin,YU Quan-cheng. Analysis of bending on the front end of sheet during hot rolling[J]. Journal of University of Science and Technology Beijing,2006,13(1):54.
[6] Salimi M,Kadkhodaei M. Slab analysis of asymmetrical plate rolling[J]. Journal of Materials Processing Technology,2004,150(3):215.
[7] Kiefer T,Kugi A. An analytical approach for modelling asymmetrical hot rolling of heavy plates[J]. Mathematical and Computer Modelling of Dynamical Systems,2008,14(3):249.
[8] Byon S M,Lee Y. An in-line model for predicting front end bending in hot plate rolling and its experimental verification[J]. Proceedings of the Institution of Mechanical Engineers Part B—Journal of Engineering Manufacture,2014,227(8):1111.
[9] Lee K,Han J,Park J,et al. Prediction and control of front-end curvature in hot finish rolling process[J]. Advances in Mechanical Engineering,2015,7(11):1.
[10] Anders D,Münker T,Artel J,et al. A dimensional analysis of front-end bending in plate rolling applications[J]. Journal of Materials Processing Technology,2012,212(6):1387.
[11] 陈彬,程晓茹,胡衍生,等. 中厚板头部弯曲的正交实验及分析[J]. 钢铁研究学报,2006,18(5):22.(CHEN Bin,CHENG Xiao-ru,HU Yan-sheng,et al. Orthogonal test and analysis of warping phenomenon in plate rolling process[J]. Journal of Iron and Steel Research,2006,18(5):22.)
[12] 黄少帅,王雪松,王坤,等. 轧制线高度对宽厚板翘头的影响与分析[J]. 中国冶金,2018,28(4):57.(HUANG Shao-shuai,WANG Xue-song,WANG Kun,et al. Influence and analysis of rolling line height on head warping of heavy plate[J]. China Metallurgy,2018,28(4):57.)
[13] 靳皓越,孙杰,魏臻,等. 基于有限元法的拉伸弯曲矫直过程板形控制分析[J]. 钢铁,2022,57(6):100.(JIN Hao-yue,SUN Jie,WEI Zhen,et al. Flatness control analysis of tension levelling process based on finite element method[J]. Iron and Steel,2022,57(6):100.)
[14] 于孟,王春海,张晓峰,等. 不锈钢/碳钢复合板平整轧制过程板形翘曲行为[J]. 钢铁,2022,57(7):106.(YU Meng,WANG Chun-hai,ZHANG Xiao-feng,et al. Shape warping behavior of stainless steel/carbon steel clab plate during temper rolling[J]. Iron and Steel,2022,57(7):106.)
[15] Lu J S,Harrer O K,Schwenzfeier W,et al. Analysis of the bending of the rolling material in asymmetrical sheet rolling[J]. International Journal of Mechanical Sciences,2000,42(1):49.
[16] Knight C W,Hardy S J,Lees A W,et al. Finite element modelling of strip curvature during hot rolling[J]. Ironmaking and Steelmaking,2002,29(1):70.
[17] Knight C W,Hardy S J,Lees A W,et al. Investigations into the influence of asymmetric factors and rolling parameters on strip curvature during hot rolling[J]. Journal of Materials Processing Technology,2003,134(2):180.
[18] Philipp M,Schwenzfeier W,Fischer F D,et al. Front end bending in plate rolling influenced by circumferential speed mismatch and geometry[J]. Journal of Materials Processing Technology,2007,184(1-3):224.
[19] 孙一康,周纪华,孙民生. 带钢热连轧数学模型基础[M]. 北京:冶金工业出版社,1979.(SUN Yi-kang,ZHOU Ji-hua,SUN Min-sheng. Mathematical Model Basis for Hot Strip Rolling[M]. Beijing:Metallurgical Industry Press,1979.)
[20] 刘相华,胡贤磊,杜林秀,等. 轧制参数计算模型及其应用[M]. 北京:化学工业出版社,2007.(LIU Xiang-hua,HU Xian-lei,DU Lin-xiu,et al. Rolling Parameter Calculation Model and Application[M]. Beijing:Chemical Industry Press,2007.)
[21] 马更生. 不锈钢带钢热连轧过程控制策略及热力耦合模型研究[D]. 沈阳:东北大学,2018.(MA Geng-sheng. Study on Control Strategy and Temperature and Rolling Force Coupling Models for Hot Rolling of Stainless Steel Strip[D]. Shenyang:Northeastern University,2018.)
[22] 彭文,陈树宗,马更生,等. 基于有限元分析的中间坯温度预报策略[J]. 中南大学学报(自然科学版),2017,48(11):2873.(PENG Wen,CHEN Shu-zong,MA Geng-sheng,et al. Temperature prediction strategy of intermediate slabs based on finite element method[J]. Journal of Central South University(Natural Science),2017,48(11):2873.)
[23] 李伟. 中厚板厚向不对称变形的数值模拟及头部弯曲控制研究[D]. 沈阳:东北大学,2019.(LI Wei. Numerical Simulation of Thick Asymmetric Deformation and Control Research on Head Bending of Medium Plates[D]. Shenyang:Northeastern University,2019.)