(1. 北京科技大學 材料科學與工程學院，北京 100083；
2. 清華大學 機械工程系，北京 100084)
摘 要: 為了研究雙金屬復合管擠壓參數(shù)及其結(jié)合面的情況與擠壓參數(shù)的關(guān)系，基于熱力耦合的有限元原理，采用ABAQUS有限元軟件，通過建立合理的有限元分析模型，對Al/Mg雙層復合管在半固態(tài)多坯料擠壓工藝下進行數(shù)值模擬研究，得到變形體在不同變形溫度下的溫度場和應(yīng)力、應(yīng)變分布，確定界面比為3׃7時的擠壓速度和初始溫度，優(yōu)化擠壓模具，同時，結(jié)合速度分析結(jié)合界面的結(jié)合情況。
關(guān)鍵字: 半固態(tài)成形；多坯料擠壓；雙層復合管；有限元模擬；熱力耦合
aluminum and magnesium alloys
（1. School of Materials Science and Engineering, University of Science and Technology Beijing,
Beijing 100083, China;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China）
Abstract: 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.
Key words: semi-solid forming; thixo-co-extrusion; double-layer tube; FEM simulation; thermal-mechanical coupling
