Mathematical Model and Theoretical Research of Flow Shear Constitutive Relation during Rheo-rolling of Semisolid Alloy  

作　　者：赵占勇 管仁国 WEI Qing ZHANG Yang XU Guangming LI Yuandong 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University [2]School of Materials Science and Engineering, Lanzhou University of Technology [3]Binxin Jiang Su Province Special Steel Material Co., Ltd.

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2015年第5期1049-1055,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation for Outstanding Young Scholars of China(No.51222405);National Natural Science Foundation of China(No.51474063)

摘　　要：The mathematical model of flow shear constitutive relation during rheo-rolling process has been established. The distribution of velocity and shear stress in rolling cavity was investigated, and the effects of process parameters on shear stress of Sn-15 Pb alloy during rheo-rolling process were studied. In rolling cavity, the nearer the roll is, the bigger the velocity and shear stress are. The shear stress increases with the increment of the roll speed and the roll radius during rheo-rolling process, but deceases with the increment of the thickness of the strip. When the solid fraction of Sn-15 Pb alloy increases from 0.3 to 0.5, the shear stress increases slowly, but when the solid fraction increases from 0.5 to 0.6, the shear stress rapidly.The mathematical model of flow shear constitutive relation during rheo-rolling process has been established. The distribution of velocity and shear stress in rolling cavity was investigated, and the effects of process parameters on shear stress of Sn-15 Pb alloy during rheo-rolling process were studied. In rolling cavity, the nearer the roll is, the bigger the velocity and shear stress are. The shear stress increases with the increment of the roll speed and the roll radius during rheo-rolling process, but deceases with the increment of the thickness of the strip. When the solid fraction of Sn-15 Pb alloy increases from 0.3 to 0.5, the shear stress increases slowly, but when the solid fraction increases from 0.5 to 0.6, the shear stress rapidly.

关 键 词：SEMISOLID rheo-rolling flow shear mathematical model 

分 类 号：TG339[金属学及工艺—金属压力加工]