复合添加Sc、Zr的Al-Zn-Mg-Cu合金挤压铸造数值模拟  

Numerical Simulation of Direct Squeeze Casting Al-Zn-Mg-Cu Alloy Containing Sc and Zr

作　　者：徐蕾[1] 张志峰[1] 徐骏[1] 李豹[1] 王志刚[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心

出　　处：《特种铸造及有色合金》2014年第4期397-400,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB606302);国家高技术研究发展计划(863计划)资助项目(2013AA030701);国家国际科技合作计划资助项目(2013DFA51370)

摘　　要：利用ProCAST软件对复合添加微量Sc、Zr元素的Al-Zn-Mg-Cu合金进行了挤压铸造数值模拟研究,考察了该合金的成形性能。结果表明,充型过程中,壁厚不同部位液体充填速度也不同,壁厚越大,充填速度越快;充填不平稳,容易在液流交汇处产生夹杂、卷气等缺陷,改进工艺可获得无夹杂、卷气缺陷的零件。Numerical simulation of direct squeeze casting AI-Zn-Mg-Cu alloy with compound trace Sc.Zr addition was conducted with the help of the ProcCAST software to understand the formability of the al- loy in a special design mold. The simulated results reveal that during filling process, different filling ve- locity can be observed at different thick location, where with increasing in thickness, the filling velocity is accelerated. The inclusion and entrapped-gas easily occurs in convergence of liquid metal as a result of un-stable filling. Through modifying design, the squeezing casting parts with inclusion-free and entrap- ment-gas free can be produced.

关 键 词：AL-ZN-MG-CU合金 挤压铸造 数值模拟 

分 类 号：TG249.2[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]