Zn对粉末冶金法制备Mg-Zn合金组织与性能的影响（英文）

发布时间：2018-01-20 10:07

本文关键词： 粉末冶金 Mg-Zn合金 Zn含量显微组织性能　出处：《稀有金属材料与工程》2016年11期 　论文类型：期刊论文

【摘要】：以Mg粉和Zn粉为初始原料,采用粉末冶金技术制备Mg-Zn合金。研究了Zn含量对Mg-Zn合金烧结密度、显微组织、物相组成、弯曲强度和显微硬度的影响。测量了Mg-Zn合金的耐腐蚀性,探讨了Zn元素在粉末冶金过程中的作用机理。结果表明,添加Zn元素后,烧结产物的晶粒细小,烧结密度提高。此外,随着Zn含量的增加,烧结产物的致密度持续增加。XRD分析表明Mg-3%Zn(质量分数)合金主要由α-Mg相组成,而Mg-4%Zn合金由α-Mg和MgZn_2两相组成。随着Zn含量的增加,Mg-Zn合金的抗弯曲强度先增加而后降低,但是显微硬度(HV)持续增加。Mg-3%Zn合金的抗弯强度为123.6 MPa,显微硬度为1017 MPa,分别比纯Mg样品高出58%和45%。耐腐蚀性能测试表明当添加Zn元素后,Mg-Zn合金的腐蚀速率降低,Mg-3%Zn合金具有最低的腐蚀速率和最佳的耐腐蚀性能。
[Abstract]:Mg-Zn alloy was prepared by powder metallurgy from mg powder and Zn powder. The sintering density, microstructure and phase composition of Mg-Zn alloy with Zn content were studied. The effect of bending strength and microhardness on the corrosion resistance of Mg-Zn alloy was measured and the mechanism of Zn in powder metallurgy process was discussed. The grain size of the sintered product is fine and the sintering density is increased, in addition, with the increase of Zn content. The density of the sintered product increases continuously. XRD analysis shows that the Mg-3Zn alloy is mainly composed of 伪 -Mg phase. The Mg-4%Zn alloy consists of 伪 -Mg and MgZn_2 phases. The bending strength of Mg-Zn alloy increases first and then decreases with the increase of Zn content. However, the bending strength and microhardness of Zn alloy were 123.6 MPA and 1017 MPa, respectively. The corrosion resistance of Mg-Zn alloy is 58% and 45 higher than that of pure mg sample, respectively. The corrosion rate of Mg-Zn alloy decreases with the addition of Zn. Mg-3%Zn alloy has the lowest corrosion rate and the best corrosion resistance.
【作者单位】：辽宁工业大学;东北大学;
【基金】：National High-Tech Research and Development Program of China("863" Program)(2011AA060102) National Science Fund for Young Scholars(51405215) Natural Science Foundation of Liaoning Province(2014020111) High School Development Plan for Distinguished Young Scholars of Liaoning Province Education Committee(LJQ2013067) Project of Higher Education Innovation Team of Liaoning Province(LT2013014) Basic Research Project of Provincial Key Laboratory of Liaoning Education Department(LZ2014031)
【分类号】：TF125.22
【正文快照】： Lightweight metals such as magnesium alloys are ofincreasing interests because of their potential applications in a lotof fields,such as transportation,aerospace and biomedicalareas[1].The need to reduce weight to increase payload,and tominimize fuel con

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