连退过程中带钢缩颈预报模型及其影响因素研究  

Research on a strip shrinkage forecasting model and its influential factors during the continuous annealing process

作　　者：王彦辉 杨永辉 牛百草 谭海龙 李学通 WANG Yanhui;YANG Yonghui;NIU Baicao;TAN Hailong;LI Xuetong(Cold Rolling Plant,Zhanjiang Iron and Steel Co.,Ltd.,Zhanjiang 524072,China;National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]湛江钢铁有限公司冷轧厂,广东湛江524072 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《轧钢》2025年第1期113-118,共6页Steel Rolling

基　　金：河北省科学技术研究与发展计划—科技支撑计划项目(23280101Z);河北省高等学校科学技术研究项目(CXY2023012);河北省重大科技成果转化专项项目(22281001Z);辽宁省教育厅高等学校基本项目(LJKZZ20220040);中央引导地方科技发展资金项目(236Z1024G)。

摘　　要：在连退过程中,根据带钢尺寸精度的要求,需要对其宽度进行精确预报。为此,建立了连退过程中带钢缩颈量的预报模型。介绍了带钢缩颈的概念;针对单对炉辊,将带钢沿横向划分成多个条元,分析了单个条元上带钢在总张力、温度不均匀、来料板形、炉辊辊形综合作用下产生的横向不均匀变形,并计算了单个条元在各因素综合作用下在纵向上产生的变形量,其减去带钢最大弹性变形量,即为带钢在纵向的塑性变形量,再根据体积不变原理即可求出单对炉辊单个条元带钢的缩颈量,通过叠加不同条元、不同炉辊带钢的缩颈量即可求出带钢在连退过程中的总缩颈量。根据缩颈量模型,采用控制变量法,定量分析了各因素对带钢缩颈量的影响,结果表明:带钢总张力和带钢表面温度对缩颈量的影响较大;将本模型应用到现场,模型预报精度达到了95%以上,可以满足实际生产的需求。During the continuous annealing process,it is necessary to accurately predict the width of the strip according to its dimensional accuracy requirements.Therefore,a forecasting model for the shrinkage amount of strip during the continuous annealing process was established.The concept of strip shrinkage is introduced.For a single pair of furnace rollers,the strip is divided into multiple strip elements along the transverse direction.The transverse non-uniform deformation of the strip on a single strip element under the combined effects of total tension,temperature non-uniformity,incoming plate shape,and furnace roller shape is analyzed.The deformation amount of a single strip element in the longitudinal direction under the combined effects of various factors is calculated.Subtracting the maximum elastic deformation of the strip is the plastic deformation amount of the strip in the longitudinal direction.Then,based on the principle of volume invariance,the shrinkage amount of the strip in a single pair of furnace rollers can be calculated.By superimposing the shrinkage amounts of different strip elements and furnace rollers,the total shrinkage amount of the strip in the continuous annealing process can be obtained.According to the shrinkage amount model,the influence of various factors on the shrinkage amount of the strip was quantitatively analyzed using the control variable method.The results showed that the total tension and surface temperature of the strip had a significant impact on the shrinkage amount.The application of this model to on-site practice has achieved a prediction accuracy of over 95%,which can meet the needs of actual production.

关 键 词：冷轧带钢 连续退火 缩颈量 张力 温度 预报模型 

分 类 号：TG3[金属学及工艺—金属压力加工]