固态扩渗锌处理对纯镁表面组织和性能的影响  

Effect of Solid Diffusion Zinc Treatment on Microstructure and Properities of Alloyed Layer of Pure Magnesium

作　　者：马幼平[1] 刘鹏飞[2] 温维新[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：《有色金属》2005年第2期29-31,共3页Nonferrous Metals

基　　金：西安市科技局项目(GG200346);陕西省教育厅项目(01ZC17);陕西省科技厅项目(2004E;11)

摘　　要：采用固态扩渗锌粉方法,对纯镁进行表面合金化改性工艺处理,研究合金层组织结构、硬度及其腐蚀行为。结果表明,固态扩渗实验在纯镁表面形成了MgZn合金层,MgZn合金层主要由MgZn固溶体和Mg7Zn3金属间化合物组成,合金层提高镁的表层硬度并明显改善耐盐水腐蚀性能。Surface modification treatment of pure magnesium by solid diffusion zinc treatment is conducted, and the microstructure, microhardness and corrosion behavior of alloying layer are investigated. It is shown by the test results that the alloyed layer has formed near the surface of pure magnesium after the treatment of diffusing zinc. The alloyed layer is mainly composed of the Mg-Zn solid solution and the Mg_7Zn_3 intermetallic compounds. The microhardness of the specimen surface layer is increased by the alloying treatment, and the corrosion resistance for NaCl solution is obviously improved.

关 键 词：组织和性能 纯镁 固态 渗锌 金属间化合物 表面合金化 合金层 工艺处理 组织结构 腐蚀行为 腐蚀性能 固溶体 扩渗 硬度 

分 类 号：TG161.8[金属学及工艺—热处理] TF549.9[金属学及工艺—金属学]