Sb对Mg-4Al-2Si合金显微组织和力学性能的影响

宋佩维; 郭学锋; 井晓天; 葛利玲

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Sb对Mg-4Al-2Si合金显微组织和力学性能的影响
Effects of Sb on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy
2007年第2期页码：88-91
纸质出版日期： 2007 ，
DOI：

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[1]宋佩维,郭学锋,井晓天,葛利玲.Sb对Mg-4Al-2Si合金显微组织和力学性能的影响[J].特种铸造及有色合金,2007(02):88-91+77.

Song Peiwei~ 1, 2, Jing Xiaotian~1, et al. Effects of Sb on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(2):88-91.
[1]宋佩维,郭学锋,井晓天,葛利玲.Sb对Mg-4Al-2Si合金显微组织和力学性能的影响[J].特种铸造及有色合金,2007(02):88-91+77. DOI：

Song Peiwei~ 1, 2, Jing Xiaotian~1, et al. Effects of Sb on Microstructure and Mechanical Properties of Mg-4Al-2Si Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(2):88-91. DOI：

摘要

研究了合金元素Sb对Mg-4Al-2Si合金显微组织和力学性能的影响。结果表明

加入少量的Sb（0.25%

.75%）能有效细化汉字状Mg2Si相颗粒和α（Mg）基体组织

并在合金中形成Mg3Sb2相

提高合金的力学性能:当Sb含量为0.25%时

Mg2Si颗粒显著细化;当Sb含量为0.75%时

α（Mg）基体组织的细化效果最佳

形成了细小、均匀的α（Mg）等轴晶组织

此时合金的抗拉强度和屈服强度达到最大值;当Sb含量大于0.75%时

Mg2Si相颗粒向晶界大量偏聚并粗化

导致材料力学性能迅速下降。

Abstract

The effects of Sb addition on the microstructure and mechanical properties of Mg-4Al-2Si alloy have been examined. The results show that 0.2%

.75% Sb addition can obviously refine Chinese script Mg

Si particles and matrix α-Mg phase

and create Mg

phase in the alloy

improving the mechanical properties of the alloy

where Mg

Si particles can be greatly refined with 0.25%Sb addition and fine and homogeneousα-Mg equiaxed grain can be generated with 0.75% Sb addition to obtain maximum tensile strength and yield strength. With Sb addition more than 0.75%

the mechanical properties can be dramatically deteriorated

which is as a result of segregation and coarse of amounts of Mg

Si particles towards grain boundary.