热轧板坯头部翘曲的热力耦合仿真  

Coupled thermal-mechanical simulation of front end bending in hot rolling

作　　者：李顺华[1] 吕勇[1] 李友荣[1] 覃军世[1] 游细桥[1] 

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,武汉430081

出　　处：《塑性工程学报》2011年第3期43-47,共5页Journal of Plasticity Engineering

基　　金：湖北省高等学校中青年创新团队资助项目(T200905);武汉科技大学冶金设备与控制教育部重点实验室开放基金资助项目(2009A10)

摘　　要：根据某热轧厂R1轧机的轧制过程工艺参数,建立板坯在轧制过程中的三维动态非对称轧制的有限元模型,分析热轧板坯在轧制过程中头部翘曲的产生机理。通过仿真,分别探究轧辊辊径差、轧制线中心高度及板坯上下表面温差对轧件头部翘曲的单作用的影响规律,板坯头部翘曲的翘曲量随着非对称轧制条件程度的增加而增大。根据实际生产情况对R1轧机的轧制过程进行热力耦合仿真,综合考虑轧辊辊径差、轧制线中心高度和板坯上下表面温度差3个因素对板坯头部翘曲共同作用的影响,由仿真结果得到了有利于生产的"雪橇"式头部弯曲的轧制规程,从而对实际生产予以指导。According to the practice on R1 mill,the three-dimensional simulation model for the asymmetrical rolling has been constructed to analyze the mechanism of front end bending during the Hot Strip rolling using the rigid-plastic finite element method（FEM）,based on previous theory analysis.The proposed model is used to analyze the causes and influential factors,such as the diameter radio of rollers,rolling line height and different surface temperatures.The study shows that curvature of front end bending is caused by the diameter difference of rollers,rolling line height and different surface temperatures.Further conclusion states clearly that the curvature of front end bending increases as the degree of asymmetric rolling increases.Therefore,it＇s necessary to obtain the ＂sled＂ type front end bending considering the above factors.

关 键 词：头部翘曲 非对称轧制 热力耦合 有限元法 

分 类 号：TG335.11[金属学及工艺—金属压力加工]