热连轧粗轧调宽轧制过程边角部金属流动三维数值模拟  

Three-dimensional numerical simulation of the edger and corner metal's flow on edging rolling on roughing of hot continuous rolling process

作　　者：王晓南[1] 邸洪双[1] 梁冰洁[1] 夏小明[1,2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110004 [2]上海梅山钢铁股份有限公司热轧板厂,上海210039

出　　处：《物理学报》2009年第F06期84-88,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2006CB605208)资助的课题~~

摘　　要：以梅山钢铁股份有限公司热轧机组的粗轧板坯边部出现"黑线"为背景,对孔型立辊的5道次可逆立-平轧制过程进行了数值模拟.模拟结果表明:孔型立辊轧制能更有效地纠正双鼓变形,避免产生边部夹层;轧件的边角部金属在轧制过程中逐渐流动到轧件的上下表面;在相同轧制工艺条件下,随着孔型内倒角半径的增加翻平量逐渐增大;轧制过程中,低温、高应力应变状态的金属在轧件边部的累积最终可能导致轧件边部沿长度方向产生"黑线"缺陷;合理地设计立辊的形状和优化立轧压下制度可以避免边部夹层的产生,并减少"黑线"缺陷甚至消除该缺陷.Based on the seam-defect appearing on the plate edge of rough-rolling medium billet in the Meishan Iron and Steel Company＇s hot-rolling units, the five-pass reversible vertical-horizontal rolling of different vertical roll shapes process is simulated numerically. The results show that groove vertical rolls rolling can inhibit double bulging deformation better. On the same rolling process conditions, the value of side tumbling on groove vertical rolling is larger than that on flat vertical rolling, and the value of side tumbling increases with the groove fillet radius increasing. During the rolling process, that the metal at low temperature, high strain and high stress cumulates on the edge of the workpiece may bring the seam-defect along the length of the workpiece. The edge interlayers could be avoided by reasonably designing the vertical roll shape and optimizing the vertical roll＇s screw system, thereby reducing or avoiding the occurrence of seam-defects.

关 键 词：热连轧 数值模拟 “黑线”缺陷 

分 类 号：TG331[金属学及工艺—金属压力加工]