作　　者： ; ; ; ;

机构地区： 东北大学材料与冶金学院

出　　处： 《材料与冶金学报》 2006年第1期68-72,共5页

摘　　要： 以半固态挤压扩展成形A2017铝合金扁型材为研究对象,采用有限元方法对半固态挤压扩展成形过程热流耦合场进行三维数值模拟,建立了热流耦合数学模型,确定了计算模型的边界条件以及所研究合金的热物性参数,获得了不同工艺参数和模具设计参数下合金动态凝固过程的温度场和速度场,特别是模具设计参数对模腔内合金流动规律的影响,从而为合理设计成形模具,调整成形工艺,提高制品质量找到依据. A2017 flat bars made by semi-solid extruding extending forming process were taken as specimens and the thermal-fluid multiple fields during the process was simulated by three-dimensional finite element method. A mathematical model of thermal-fluid was set up, with boundary condition of calculation model and physical parameters of A2017 alloy all being determined. The velocity and temperature fields in dynamic solidification process were obtained in different process and moulds designed with different parameter, in particular the effects of mould design parameters on the metal flow behavior in the extending cavity were obtained. It will provide a reference for designing mould rationally, adjusting process parameters and taking measures to improve the quality of products.

关 键 词： 半固态金属 挤压扩展成形 数值模拟 有限元方法 铝合金

领　　域： [金属学及工艺]