杨森,王三军,龚涛,刘文今

• 1:内蒙古工业大学材料科学与工程学院
• 2:内蒙古工业大学材料科学与工程学院
• 3:清华大学机械工程系
• 4:清华大学机械工程系 内蒙古呼和浩特010051

摘要(Abstract)：

利用激光熔覆技术在铝合金表面制备MoSi_2/SiCp复合涂层,对涂层的微观组织形成规律及其主要工艺参数对涂层组织和性能的影响进行了研究。实验结果表明,对试样进行搭接预热和在熔覆粉末中添加助熔剂CaF_2是提高熔覆层质量的主要途径。采用多道搭接预热熔覆工艺和预置涂层法可以在铝合金表面获得具有完全冶金结合的原位自生SiC颗粒增韧的硅化钼陶瓷复合涂层,涂层组织主要由Mo(Si,Al)_2、SiC、α-Al、Mo_5Si_3等相组成。熔覆层显微硬度较基体材料的显微硬度有大幅度提高,涂层显微硬度最大可达850HV_(0.2)。

关键词(KeyWords)： 激光熔覆;原位自生;二硅化钼;SiC

Abstract:

Keywords:

基金项目(Foundation): 内蒙古自然科学基金(200508010704)

作者(Author): 杨森,王三军,龚涛,刘文今

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