温度变化对ZM5镁合金表面扩渗层组织的影响  

Effect of different diffusion temperature on the microstructure of surface diffusion layer of ZM5 magnesium alloy

作　　者：马幼平[1] 温维新[2] 刘鹏飞[2] 徐可为[1] 

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

出　　处：《兵器材料科学与工程》2004年第2期33-35,49,共4页Ordnance Material Science and Engineering

基　　金：陕西省科技厅攻关项目 ( 2 0 0 1K0 7-G1);陕西省教育厅项目 ( 0 1ZC17);西安市科技局项目 (GG2 0 0 3 46)

摘　　要：研究了温度变化对ZM 5镁合金表面扩渗层组织特征的影响。研究结果表明 :在实验的温度范围内 ,表面扩渗层由Mg -Al-Zn固溶体和Mg -Al-Zn金属间化合物组成 ;扩渗层的组织形貌随着温度的变化而改变。随扩散温度的升高 ,扩渗层中Mg -Al-Zn固溶体区域层逐渐变宽 ,Mg -Al-Zn金属间化合物的析出量明显增加 ,且分布形貌有由不连续向连续、条状向网状变化的趋势。较低温度时 ,Mg -Al-Zn金属间化合物仅沿试样表面析出 ;较高温度时 ,Mg -Al-Zn金属间化合物不仅沿试样表面析出 ,并以网状分布的形式向基体内部延伸。In this study, under given experimental condition, different diffusion temperature have been taken out to explore the effect of different diffusion temperature on the microstructure character of surface diffusion layer of ZM5 Magnesium alloy. The results shown that the Mg-Al-Zn solid solution and the Mg-Al-Zn intermetallic compounds consist of the surface diffusion layer. The microstructure morphology of the surface diffusion layer would vary with the change of diffusion temperature. With the rise of diffusion temperature, the width of the transition zone was wider and wider; the quantities of the Mg-Al-Zn intermetallic compounds increased and its distribution morphology had the tendencies from discontinue to continue and from strip-like to netlike. At lower temperature, the Mg-Al-Zn intermetallic compounds only precipitated along the surface; at higher temperature, the Mg-Al-Zn intermetallic compounds not only precipitated along the surface but also stretched into the substrate by the way of netlike.

关 键 词：温度变化 ZM5镁合金 温度 组织 表面扩渗层 

分 类 号：TG146.22[一般工业技术—材料科学与工程]