压铸Mg-5Al-xSi合金的组织与性能

张贇龙; 刘六法; 卫中山; 卢晨

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压铸Mg-5Al-xSi合金的组织与性能
Microstructure and Mechanical Properties of Die Casting Mg-5Al-xSi Alloy
2005年第10期
纸质出版日期： 2005 ，
DOI：

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[1]张贇龙,刘六法,卫中山,卢晨.压铸Mg-5Al-xSi合金的组织与性能[J].特种铸造及有色合金,2005(10):35-37+5.

Zhang Yunlong Liu Liufa Wei Zhongshan Lu Chen. Microstructure and Mechanical Properties of Die Casting Mg-5Al-xSi Alloy[J]. Special Casting & Nonferrous Alloys, 2005,(10).
[1]张贇龙,刘六法,卫中山,卢晨.压铸Mg-5Al-xSi合金的组织与性能[J].特种铸造及有色合金,2005(10):35-37+5. DOI：

Zhang Yunlong Liu Liufa Wei Zhongshan Lu Chen. Microstructure and Mechanical Properties of Die Casting Mg-5Al-xSi Alloy[J]. Special Casting & Nonferrous Alloys, 2005,(10). DOI：

摘要

研究了以AM50镁合金为基体

Si的质量分数分别为0.5%、0.93%和1.91%时的3种镁合金在压铸状态下的显微组织、流动性、力学性能和断裂特征。在含硅合金中观察到2种不同形貌的Mg2Si相

即多边形颗粒状与大块汉字状。Si元素能改善镁合金的流动性

提高合金硬度

但过高时（>0.93%）会导致合金的室温力学性能下降。拉伸试样断面表现为脆性的解理或准解理断裂。

Abstract

Effects of different Si contents

including 0.5%

0.93%

1.91%

on the microstructure

fluidity

mechanical properties and fracture of die casting AM50 Mg alloy were investigated.Two kinds of Mg

Si phases with different morphologies that are polygon particle and bulky Chinese script can be observed from the Mg alloy containing Si.Although the Si can improve the fluidity and hardness of the Mg alloy

it can result in the decrease of the mechanical properties with over 0.93% content.The fracture morphology exhibits brittle cleavage or quasi-cleavage.