大型镁合金铸件的充型模拟及缺陷分析  

Numerical Simulation and Defect Analysis of Large-size Magnesium Alloy Castings

作　　者：宋和谦 王玉凤 王悦博 张高龙 孙剑飞[1] 曹福洋[1] 宁志良[1] Song Heqian;Wang Yufeng;Wang Yuebo;Zhang Gaolong;Sun Jianfei;Cao Fuyang;Ning Zhiliang(School of Materials Science and Engineering,Harbin Institute of Technology;Tianjin Institute of Aerospace Electromechanical Equipment)

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [2]天津航天机电设备研究所

出　　处：《特种铸造及有色合金》2020年第6期587-590,共4页Special Casting & Nonferrous Alloys

基　　金：装备预研领域基金重点资助项目(61409230407)。

摘　　要：采用FLOW-3D软件模拟了某大型镂空薄壁Mg-6Gd-3Y-0.5Zr合金铸件的充型过程,采用自由液面模拟追踪方法,研究截面突变和液流前沿汇接对合金液液面上升平稳度的影响,阐述了表面膜缺陷的形成机制,并对浇注系统提出改进措施。The filling process of large-size hollow thin-walled Mg-6Gd-3Y-0.5Zr alloy castings was analyzed,and the FLOW-3Dsoftware was applied with combination of the method of free surface simulation tracking.The influence of abrupt changes in the cross section and the convergence of the front of the liquid flow on the stability of the liquid surface rise was investigated,and the formation mechanism of the surface film defects was also described.Finally,some improvements of the gating system were presenetd.

关 键 词：大型镂空薄壁铸件 镁合金 数值模拟 缺陷分析 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TG146.22[自动化与计算机技术—计算机科学与技术]