孙荣禄,牛伟,雷贻文

• 1:天津工业大学机械工程学院
• 2:天津市现代机电装备技术重点实验室

摘要(Abstract)：

以Al-Si共晶合金粉末为熔覆材料,在AZ91D镁合金表面进行了激光熔覆试验,利用光学显微镜(OM)、扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)对激光熔覆层的组织、成分和相组成进行了分析,测试了激光熔覆层的显微硬度和磨损性能。结果表明,激光熔覆层由α-Mg过饱和固溶体和Mg17Al12、Mg2Si、Al3Mg2金属间化合物等相组成,且与基材之间形成了良好的冶金结合。由于激光熔覆层中存在金属间化合物析出相强化、细晶强化和固溶强化等多种强化作用,熔覆层的硬度比AZ91D合金提高了3#4倍,磨损量比AZ91D合金降低了72%。

关键词(KeyWords)： 激光熔覆;镁合金;Al-Si合金;微观组织;磨损性能

Abstract:

Keywords:

基金项目(Foundation): 天津市应用基础及前沿技术研究计划(11JCZDJC21400);; 教育部博士点基金(20091201110002)

作者(Author): 孙荣禄,牛伟,雷贻文

DOI: 10.13289/j.issn.1009-6264.2012.11.028

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