Zr对亚共晶Mg-Si合金组织和性能的影响

周维; 张磊; 龙超

doi:10.15980/j.tzzz.2015.10.026

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Zr对亚共晶Mg-Si合金组织和性能的影响
Effect of Zr on Microstructure and Properties of Mg-0.9Si Alloy
2015年35卷第10期页码：1094-1096
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.10.026

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[1]周维,张磊,龙超.Zr对亚共晶Mg-Si合金组织和性能的影响[J].特种铸造及有色合金,2015,35(10):1094-1096.

Zhou Wei, Zhang Lei, Long Chao. Effect of Zr on Microstructure and Properties of Mg-0.9Si Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(10):1094-1096.
[1]周维,张磊,龙超.Zr对亚共晶Mg-Si合金组织和性能的影响[J].特种铸造及有色合金,2015,35(10):1094-1096. DOI： 10.15980/j.tzzz.2015.10.026.

Zhou Wei, Zhang Lei, Long Chao. Effect of Zr on Microstructure and Properties of Mg-0.9Si Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(10):1094-1096. DOI： 10.15980/j.tzzz.2015.10.026.

摘要

研究了Zr对亚共晶Mg-0.9Si合金铸态组织、力学性能和阻尼性能的影响。结果表明

Zr对Mg-0.9Si合金中的初生α-Mg相和共晶Mg2Si相具有较好的细化和变质作用。从成本因素考虑

Zr的最优加入量为0.6%左右

此时

合金的抗拉强度和伸长率分别为187.2MPa和6.8%

相比未变质合金提高了约43.4%和64.3%。在整个测试的温度范围内

加入0.6%的Zr变质Mg-0.9Si合金的阻尼值要显著高于未变质合金的阻尼值。

Abstract

Effects of Zr on microstructure

mechanical properties and damping capacity of Mg-0.9Si alloy were investigated.The results show that the solidified microstructure of Mg-0.9Si alloy can be refined significantly with Zr addition.The optimized Zr addition is 0.6%.With 0.6% Zr addition

the tensile strength and elongation of the as-cast Mg-0.9Si alloy reach 187.2MPa and 6.8%

respectively

increased by 43.4% and by 64.3%

compared with those of the unmodified alloy.Mg-0.9Si-0.6Zr alloy exhibits much higher damping capacity than that of the unmodified alloy.