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AZ31B/Al扩散连接界面扩散溶解层的结构及性能

发表时间:2009-11-30  浏览量:1288  下载量:594
全部作者: 刘奋军,杜正良,陈少平,孟庆森
作者单位: 太原理工大学材料科学与工程学院
摘 要: 通过AZ31B真空扩散焊工艺,在AZ31B/Al结合界面形成了扩散溶解结构。利用金相显微镜、扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射(X-ray diffraction,XRD)、显微硬度计等仪器分析了扩散溶解层的结构、相组成及性能。研究表明:恒温条件下,随着保温时间的延长,在AZ31B/Al界面可以形成不同宽度的、与基材呈“锯齿”状结合的扩散溶解层;扩散溶解层由过渡层和共晶区组成,其平均显微硬度比AZ31B/Mg合金基体提高了约98%;扩散溶解层的自腐蚀电流比AZ31B/Mg合金基体提高了约77%.
关 键 词: 材料合成与加工工艺;AZ31B/Mg合金;铝;扩散连接;扩散溶解层;耐蚀性
Title: Study on the structure and properties of the AZ31B aluminium alloy diffusion joint
Author: LIU Fenjun, DU Zhengliang, CHEN Shaoping, MENG Qingsen
Organization: College of Materials Science and Engineering, Taiyuan University of Technology
Abstract: The diffusion-dissolution structure was formed in the interface of AZ31B/Al diffusion joint. The microstructure, phase composition and properties of the diffusion-dissolution layer were analyzed by means of metalloscope, scanning electron microscope (SEM), X-ray diffraction (XRD), microhardness tester and so on. It was found that the diffusion-dissolution layer with different width and zigzag combined with substrate was formed in the interface of AZ31B/Al.The diffusion-dissolution layer was composed by the solid solution and eutectic phases. Its average microhardness was improved about 98% and its self-corrosion current was improved about 77%.
Key words: material synthesizing and processing;AZ31B magnesium alloy; aluminium; diffusion welding; diffusion dissolution layer; erosion resistance
发表期数: 2009年11月第22期
引用格式: 刘奋军,杜正良,陈少平,等. AZ31B/Al扩散连接界面扩散溶解层的结构及性能[J]. 中国科技论文在线精品论文,2009,2(22):2358-2363.
 
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