孙荣禄,牛伟,雷贻文,唐英

• 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Ni60+Ni/MoS2混合粉末为熔覆材料,采用Nd:YAG激光器在TC4合金表面进行了激光熔覆试验,利用OM、SEM、EDS、XRD等分析了激光熔覆层的微观组织,测试了激光熔覆层的显微硬度和摩擦磨损性能。结果表明,在激光熔覆过程中MoS2发生了分解,分解出的S与Cr反应形成了CrxSy不定比化合物,Ni60合金中的C与基材表层熔化的Ti反应形成了TiC。反应形成的CrxSy化合物呈近球状颗粒形态,TiC呈树枝晶形态,二者均匀地分布在熔覆层中。由于TiC的硬质强化作用和CrxSy的润滑作用,激光熔覆层不仅具有较高耐磨性能,而且具有低而平稳的摩擦系数。

关键词(KeyWords)： 钛合金;激光熔覆;原位自生;TiC+CrxSy/Ni复合涂层;摩擦磨损性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51371125);; 天津市应用基础及前沿技术研究计划项目(11JCZDJC21400)

作者(Author): 孙荣禄,牛伟,雷贻文,唐英

DOI: 10.13289/j.issn.1009-6264.2014.06.029

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