%A QIAN Sheng, ZHANG Wen-jun, LIN Wei, GU Qing, BAI Zhen-hua %T Formation mechanism and prediction model for C-warping defect of strip steel in continuous annealing process of hot galvalume unit %0 Journal Article %D 2021 %J Iron and Steel %R 10.13228/j.boyuan.issn0449-749x.20210051 %P 88-95 %V 56 %N 9 %U {http://www.chinamet.cn/Jweb_gt/CN/abstract/article_153086.shtml} %8 2021-09-15 %X 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.