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| Formation mechanism and prediction model for C-warping defect of strip steel in continuous annealing process of hot galvalume unit |
| QIAN Sheng1,2, ZHANG Wen-jun1, LIN Wei1, GU Qing1, BAI Zhen-hua1,3 |
1. National Cold Rolling Strip Equipment and Process Engineering Technology Research Center, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. College of Mechanical and Electrial Engineering, Huangshan University, Huangshan 245041, Anhui, China;
3. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract In order to effectively reduce the risk of C-warping of the strip steel and improve the uniformity of its surface coating, the formation mechanism of C-warping in continuous annealing process of hot dip galvanizing were studied. In view of equipment and process characteristics of continuous annealing process of hot galvalume unit, the forming mechanism of C-warping defects is analyzed in detail from the point of elastic-plastic mechanics, and then the mechanical model of C-warping is deduced. The strip element method is used to establish the prediction model of strip C-warping in the process of the unit. Based on this, the optimization recursion method is used to solve the difficulty of the prediction model of strip C-warping successfully. Finally, based on this, the software, which predicts for C-warping defects of the strip in the continuous annealing process of the galvalume unit, is formulated and applied to the scene. The model used to forecast the shape of two typical specifications strip steel in different processes of the furnace. The analysis results show that the deviation between the forecasted and measured values of unit outlet strip shape can meet the requirements of product precision. The model can predict the strip shape of the process in the furnace in real-time, and provide theoretical guidance for the subsequent process parameter optimization. So the model has the value of further popularization and application.
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Received: 25 January 2021
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[1] 林海海,于孟,文杰,等.镀锡板开平线矫直机插入量对板形控制的影响[J].中国冶金,2019,29(1):14.(LIN Hai-hai,YU Meng,WEN Jie,et al.Influence of insertion depth of straightener in tinplate's blanking line on strip shape[J].China Metallurgy,2019,29(1):14.)
[2] 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 plat[J].China Metallurgy,2018,28(4):57.)
[3] 董强,刘慧慧,张建水.横向温度分布对无取向电工钢热轧板形的影响[J].中国冶金,2019,29(8):14.(DONG Qiang,LIU Hui-hui,ZHANG Jian-shui.Effect of transverse temperature distribution on strip shape of non-orientation electrical steel in hot rolling process[J].China Metallurgy,2019,29(8):19.)
[4] 昝现亮,王凤琴,刘子英,等. 热轧带钢残余应力相关板形缺陷机理分析及攻关措施[J].中国冶金,2020,30(5):35.(ZAN Xian-liang, WANG Feng-qin, LIU Zi-ying, et al. Mechanism analysis and research measures of residual stress-related plate shape defects in hot rolled strip[J]. China Metallurgy, 2020, 30(5):35.)
[5] 昝现亮,孙翼洲,王凤琴,等.热轧平整带钢C翘机理分析及措施[J].轧钢,2020,37(5):21.(ZAN Xian-liang, SUN Yi-zhou, WANG Feng-qin,et al.Mechanism analysis of C warp defects of hot rolled strip in temper and its countermeasures[J]. Steel Rolling, 2020, 37(5):21.)
[6] 张勃洋,卢兴福,张立元,等. 冷轧极薄带钢复杂板形翘曲变形行为研究[J].机械工程学报,2018,54(12):184.(ZHANG Bo-yang, LU Xing-fu, ZHANG Li-yuan, et al. Analysis of complex warping deformation for cold-rolled strip[J].Journal of Mechan Ical Engineering,2018,54(12):184.)
[7] 唐伟,杜凤山,文杰,等.镀锡板翘曲控制策略研究与应用[J].钢铁,2019,54(12):55. (TANG Wei, DU Feng-shan,WEN Jie,et al. Research and application of warping control strategy on tinplate[J].Iron and Steel,2019,54(12):55.)
[8] Masui T,Kaseda Y,Ando K. Warp control in strip processing plant[J]. ISIJ International,1991,31(3):262.
[9] Nicolas Guelton, Catherine Lope' S, Henri Sordini. Cross coating weight control by electromagnetic strip stabilization at the continuous galvanizing line of arcelormittal florange[J].Metallurgical and Materials Transactions B,2016,47,2666.
[10] 许秀飞. 钢带热镀锌技术问答[M].北京:化学工业出版社,2007.(XU Xiu-fei. Hot Dip Galvanizing Technology for Steel Strip[M]. Beijing:Chemical Industry Press,2007)
[11] 中华人民共和国公安部. GB 51249-2017 建筑钢结构防火技术规范[S].北京:中国计划出版社,2018. (Ministry of Public Security of the People's Republic of China,et al.GB 51249-2017 Code for Fire Safety of Steel Structures in Buildings[S].Beijing:China Planning Publishing House,2018.)
[12] 徐秉业. 弹塑性力学及其应用[M].北京:机械工业出版社,1984.(XU Bing-ye. Elastoplastic Mechanics and Its Applications[M]. Beijing:China Machine Press,1984.) |
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| [3] |
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2021, Vol. 56 
