Sn对Mg-Nd-Zn-Zr合金组织和耐蚀性能的影响

刘俊峰; 姜文勇; 王晨; 李轶楠; 赵思聪

doi:10.15980/j.tzzz.2017.01.030

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Sn对Mg-Nd-Zn-Zr合金组织和耐蚀性能的影响
Effect of Sn on Microstructure and Corrosion Resistance of Mg-Nd-Zn-Zr Alloys
2017年37卷第1期页码：110-113
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.01.030

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[1]刘俊峰,姜文勇,王晨,李轶楠,赵思聪.Sn对Mg-Nd-Zn-Zr合金组织和耐蚀性能的影响[J].特种铸造及有色合金,2017,37(01):110-113.

Liu Junfeng, Jiang Wenyong, Wang Chen, et al. Effect of Sn on Microstructure and Corrosion Resistance of Mg-Nd-Zn-Zr Alloys[J]. Special Casting & Nonferrous Alloys, 2017,37(1):110-113.
[1]刘俊峰,姜文勇,王晨,李轶楠,赵思聪.Sn对Mg-Nd-Zn-Zr合金组织和耐蚀性能的影响[J].特种铸造及有色合金,2017,37(01):110-113. DOI： 10.15980/j.tzzz.2017.01.030.

Liu Junfeng, Jiang Wenyong, Wang Chen, et al. Effect of Sn on Microstructure and Corrosion Resistance of Mg-Nd-Zn-Zr Alloys[J]. Special Casting & Nonferrous Alloys, 2017,37(1):110-113. DOI： 10.15980/j.tzzz.2017.01.030.

摘要

通过金相显微镜、扫描电镜、X射线衍射仪等设备分析了Sn对铸态Mg-2.7Nd-0.4Zn-0.5Zr合金显微组织和腐蚀性能的影响。结果表明

铸态Mg-2.7Nd-0.4Zn-0.5Zr-xSn（x=0.5、1.0、1.5、2.0）合金的组织是由α-Mg基体、Mg

Nd相、点状或杆状的Mg

Sn相组成。随着Sn含量的增加

Sn相逐渐增多。铸态合金的腐蚀速率随着Sn含量的增加呈现先减小后增大的趋势

其中当Sn含量为1.0%时合金具有最佳的耐腐蚀性能。Sn的加入能够细化Mg

Nd相

同时析出更稳定性的Mg

Sn相

并在Sn含量为1.0%时分布较为均匀。

Abstract

By metallographic microscope

scanning electron microscopy（SEM）

X-ray diffraction and other equipment and analysis

influences of Sn on microstructure and corrosion resistance of the as-cast Mg-2.7Nd-0.4Zn-0.5Zr-xSn were investigated.The results reveal that as-cast Mg-2.7Nd-0.4Zn-0.5ZrxSn（x=0.5

1.0

1.5

2.0）alloys are composed ofα-Mg matrix

Nd phase

particulate or rod-like Mg

Sn phase.With increasing in Sn content

Sn phase is increased gradually.The corrosion rate of as-cast alloy presents a trend of decreasing firstly and then increasing with Sn content increase.When Sn content is 1.0%

the alloy has the desirable corrosion resistance.The addition of Sn can refine Mg

Nd phase

and generate more stable Mg

Sn phase with more uniform distribution with 1.0%Sn content.