Si-Ca合金对AM60镁合金凝固过程及显微组织的影响

张保丰; 蒋爱云; 刘德波; 陈小伟

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Si-Ca合金对AM60镁合金凝固过程及显微组织的影响
Effects of Si-Ca Alloy on Solidification and Microstructure of AM60 Magnesium Alloy
2011年31卷第5期页码：464-467
纸质出版日期： 2011 ，
DOI：

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[1]张保丰,蒋爱云,刘德波,陈小伟.Si-Ca合金对AM60镁合金凝固过程及显微组织的影响[J].特种铸造及有色合金,2011,31(05):464-467+391.

Zhang Baofeng, Jiang Aiyun, Liu Debo, et al. Effects of Si-Ca Alloy on Solidification and Microstructure of AM60 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(5):464-467.
[1]张保丰,蒋爱云,刘德波,陈小伟.Si-Ca合金对AM60镁合金凝固过程及显微组织的影响[J].特种铸造及有色合金,2011,31(05):464-467+391. DOI：

Zhang Baofeng, Jiang Aiyun, Liu Debo, et al. Effects of Si-Ca Alloy on Solidification and Microstructure of AM60 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(5):464-467. DOI：

摘要

在AM60镁合金中加入Si-Ca合金后

借助OM和SEM进行了显微组织观察。结果表明

适量的Si-Ca合金加入后

合金中形成了弥散分布的呈规则多边形状的Mg2Si颗粒

晶粒明显细化

Mg17Al12相更容易独立生长形成离异共晶

且分布也更加弥散。另外

探讨了Si-Ca合金对AM60镁合金凝固过程的影响

分析了合金显微组织改善的原因。

Abstract

Effects of Si-Ca alloy on microstructure of AM60 magnesium alloy were observed by OM（optical microscope） and SEM（scanning electron microscope）.The results indicate that with approximate Si-Ca alloy addition

grain size in the alloy is obviously refined

which is attributed to the generation of dispersedly distributed regular polygonal type Mg2Si phase

meanwhile

β-Mg17Al12 phase more easily form divorced eutectic structure with more dispersedly distribution.Effects of Si-Ca alloy on solidification of AM60 alloy were approached

and improvement mechanism of microstructure in the alloy was analyzed.