Analysis and Countermeasures of Defects in Cast Mg Alloy Housing Casting in Squeezing Casting

Li Dongnan  Luo Jirong  Xiao Zehui  Mao Youwu  Song Xiangjun

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Analysis and Countermeasures of Defects in Cast Mg Alloy Housing Casting in Squeezing Casting
Issue 5, Pages: 36-37(2003)
Published： 2003 ，
DOI：

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[1]李东南,罗吉荣,肖泽辉,毛有武,宋象军.挤压铸造镁合金壳体件缺陷分析及对策[J].特种铸造及有色合金,2003(05):36-37+67.

Li Dongnan Luo Jirong Xiao Zehui Mao Youwu Song Xiangjun. Analysis and Countermeasures of Defects in Cast Mg Alloy Housing Casting in Squeezing Casting. [J]. Special Casting & Nonferrous Alloys (5):36-37(2003)
[1]李东南,罗吉荣,肖泽辉,毛有武,宋象军.挤压铸造镁合金壳体件缺陷分析及对策[J].特种铸造及有色合金,2003(05):36-37+67. DOI：

Li Dongnan Luo Jirong Xiao Zehui Mao Youwu Song Xiangjun. Analysis and Countermeasures of Defects in Cast Mg Alloy Housing Casting in Squeezing Casting. [J]. Special Casting & Nonferrous Alloys (5):36-37(2003) DOI：

摘要

针对镁合金壳体件试模生产中出现的各种缺陷的特征

从形成机理、影响因素等进行分析

提出了相应的改进措施

最终生产出合格的铸件。试验时发现镁液浇注温度、铸型温度、比压、开始加压时间和保压时间是镁合金挤压铸造的关键工艺参数。适宜的挤压成形工艺参数为 :镁液浇注温度 690～ 72 0℃

铸型温度 2 0 0～ 2 5 0℃

开始加压时间 3～ 5s

保压时间 10～ 2 0s。

Abstract

Aimed at the features of various defects encountered in trial-production of cast Mg alloy housing

the corresponding countermeasures were given to produce qualified casting through analyzing the formation mechanism and influencing factors. The experiment showed that the key processing parameters of Mg alloy in squeezing casting depended on pouring temperature

mould temperature

specific pressure

initially pressurized time after pouring and holding pressure time. The proper processing parameters were specified as follows: pouring temperature of 690～720 ℃

mould temperature of 200～250 ℃

initially pressurized time of 3～5 s after pouring and holding pressure time of 10～20 s.