大型镁合金铸件的充型模拟及缺陷分析

宋和谦; 王玉凤; 王悦博; 张高龙; 孙剑飞; 曹福洋; 宁志良

doi:10.15980/j.tzzz.2020.06.002

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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
2020年40卷第6期页码：587-590
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.06.002

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[1]宋和谦,王玉凤,王悦博,张高龙,孙剑飞,曹福洋,宁志良.大型镁合金铸件的充型模拟及缺陷分析[J].特种铸造及有色合金,2020,40(06):587-590.

Song Heqian, Wang Yufeng, Wang Yuebo, et al. Numerical Simulation and Defect Analysis of Large-size Magnesium Alloy Castings[J]. Special Casting & Nonferrous Alloys, 2020,40(6):587-590.
[1]宋和谦,王玉凤,王悦博,张高龙,孙剑飞,曹福洋,宁志良.大型镁合金铸件的充型模拟及缺陷分析[J].特种铸造及有色合金,2020,40(06):587-590. DOI： 10.15980/j.tzzz.2020.06.002.

Song Heqian, Wang Yufeng, Wang Yuebo, et al. Numerical Simulation and Defect Analysis of Large-size Magnesium Alloy Castings[J]. Special Casting & Nonferrous Alloys, 2020,40(6):587-590. DOI： 10.15980/j.tzzz.2020.06.002.

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。

Abstract

The filling process of large-size hollow thin-walled Mg-6Gd-3Y-0.5Zr alloy castings was analyzed

and the FLOW-3 Dsoftware 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.