Die-casting Process Design and Optimization of Thin-Walled Magnesium Alloy Based on Numerical Simulation

Ming Yue; You Guoqiang; Li Yang; Ma Xiaoli; Xiang Dongxia; Yang Minghua

doi:10.15980/j.tzzz.2014.10.010

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Die-casting Process Design and Optimization of Thin-Walled Magnesium Alloy Based on Numerical Simulation
Vol. 34, Issue 10, Pages: 1047-1050(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.10.010

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[1]明玥,游国强,李阳,马小黎,向冬霞,杨明华.薄壁镁合金件压铸工艺优化[J].特种铸造及有色合金,2014,34(10):1047-1050.

Ming Yue, You Guoqiang, Li Yang, et al. Die-casting Process Design and Optimization of Thin-Walled Magnesium Alloy Based on Numerical Simulation. [J]. Special Casting & Nonferrous Alloys 34(10):1047-1050(2014)
[1]明玥,游国强,李阳,马小黎,向冬霞,杨明华.薄壁镁合金件压铸工艺优化[J].特种铸造及有色合金,2014,34(10):1047-1050. DOI： 10.15980/j.tzzz.2014.10.010.

Ming Yue, You Guoqiang, Li Yang, et al. Die-casting Process Design and Optimization of Thin-Walled Magnesium Alloy Based on Numerical Simulation. [J]. Special Casting & Nonferrous Alloys 34(10):1047-1050(2014) DOI： 10.15980/j.tzzz.2014.10.010.

摘要

针对镁合金特殊的凝固特性

借助AnyCasting软件

对镁合金笔记本外壳充型凝固过程进行数值模拟。分析压铸过程中金属液的流动过程

以及造成卷气和缩孔、缩松的原因。通过采取降低浇注温度、提高快压射速度的方法

充型过程中的回流行为得到一定程度的改善

但缩孔、缩松没有明显减少。通过在凝固过程中对压铸件施加压力

促进金属液凝固

缩孔、缩松缺陷明显减少。

Abstract

Numerical simulation of filling and solidification process for the magnesium alloy notebook shell was carried out with the help of AnyCasting according to magnesium alloy solidification characteristics.The flow of liquid metal in the die casting process

and the origination of entrapped gas and shrinkage in the shell were analyzed.Results indicate that the backflow in the filling process is improved to some extent

however

the decrease of shrinkage porosity（holes）can not be observed by decreasing temperature and increasing the fast injection speed

However

the shrinkage porosity（holes）can be significantly improved by applying pressure on die castings to promote the metal solidification.