表面扩渗Al,Zn处理对ZM5镁合金性能的影响  

Effect of Solid Diffusion Metallic Cementation on Properties of ZM5 Magnesium Alloy

作　　者：马幼平[1] 徐可为[1] 潘希德[1] 温维新[2] 刘鹏飞[2] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]西安建筑科技大学,陕西西安710055

出　　处：《稀有金属材料与工程》2005年第3期433-435,共3页Rare Metal Materials and Engineering

基　　金：西安市科技局项目(GG200346);陕西省科技厅攻关项目(2001K07-G1);陕西省教育厅项目(01ZC17)

摘　　要：通过铝锌(Al, Zn)混合粉对ZM5 镁合金进行了表面固态扩渗铝锌(Al, Zn)处理,在衬底形成了Mg-Al-Zn合金层。研究结果表明:Mg-Al-Zn 合金层主要由Mg-Al-Zn 固溶体和Mg-Al-Zn 金属间化合物(Al6Mg10Zn,Al5Mg11Zn4)组成,该合金层不仅使ZM5 镁合金表面合金层显微硬度显著提高,而且在盐水浸泡腐蚀过程中,在衬底与腐蚀介质之间起到了良好的屏障作用,从而赋予试样良好的腐蚀性能。Metallic cementation treatment about Al, Zn elements on ZM5 magnesium alloy was conducted by solid diffusion. It was shown that the solid diffusion layer was mainly composed of Mg-Al-Zn intermetallic compounds and Mg-Al-Zn solid solution transition zone that had more Zn and Al elements than standard ZM5 magnesium substrate did. The test indicated that the microhardness values of Mg-Al-Zn intermetallic compounds were much higher than that of the substrate, and this would greatly contribute to the enhancement of wear resistance. The diffusion alloying layer was an effective corrosion barrier to decrease the corrosion rate for ZM5 magnesium alloy when exposed to 3.0% NaCl solutions.

关 键 词：镁合金 表面 腐蚀性能 渗铝 AL-ZN合金 显微硬度 金属间化合物 处理 研究结果 影响 

分 类 号：TG174.4[金属学及工艺—金属表面处理]