半固态挤压铝／镁合金双金属复合管的有限元模拟  

FEM simulation on extrusion of double-layer tube of aluminum and magnesium alloys

作　　者：杜艳梅[1] 王开坤[1,2] 张鹏[1] 马春梅[1] 徐锋[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]清华大学机械工程系,北京100084

出　　处：《中国有色金属学报》2009年第2期208-216,共9页The Chinese Journal of Nonferrous Metals

基　　金：北京市自然科学基金资助项目(2072012);国家高技术研究发展计划(863)资助项目(2007AA03Z119);中电集团第四十三研究所创新基金项目

摘　　要：为了研究双金属复合管挤压参数及其结合面的情况与挤压参数的关系,基于热力耦合的有限元原理,采用ABAQUS有限元软件,通过建立合理的有限元分析模型,对Al/Mg双层复合管在半固态多坯料挤压工艺下进行数值模拟研究,得到变形体在不同变形温度下的温度场和应力、应变分布,确定界面比为3:7时的挤压速度和初始温度,优化挤压模具,同时,结合速度分析结合界面的结合情况。In order to study the extrusion parameters of the double-layer tube and the interaction between the interface and the extrusion parameters. The process of bonding for the double-layer tube of Al/Mg by thixo-co-extrusion was analyzed by ABAQUS FEM microsoft based on the thermal-mechanical coupling finite element method （FEM） theory and finite model. The temperature field and the distribution of the stress and the equivalent strain in the sample on the process of binding by thixo-co-extrusion were also achieved. The velocity laws of component metal on the deforming process of the extrusion were analyzed with three kinds of bonding proportions. The extrusion speed and the initial temperature at the bonding proportion of 3：7 are available. And the extrusion die is also optimized. At the same time the varying of the interface between inner and outer metal along with the velocity is obtained.

关 键 词：半固态成形 多坯料挤压 双层复合管 有限元模拟 热力耦合 

分 类 号：TG249[金属学及工艺—铸造]