摘要
针对抽油泵泵筒与柱塞存在着严重的磨损和腐蚀失效问题,采用激光熔覆原位合成技术,制备了耐磨减磨耐蚀的金属陶瓷TiC/Ni复合涂层。借助于EPMA分析和磨损试验,研究了Mo对TiC/Ni涂层磨损性能的影响。研究结果表明,涂层中加入5%Mo,TiC晶粒细化,组织的均匀性改善,硬度和耐磨性提高,摩擦因数降低;加入10%Mo,TiC晶粒粗大,硬度和耐磨性下降。在TiC/Ni涂层中,Mo分别与TiC相和γ-Ni相扩散固溶,在TiC颗粒周围形成(Ti,Mo)C固溶体环形相,可以提高陶瓷相的界面结合力。熔覆层的耐磨机制为增强相的抗磨作用,磨损形貌为短而浅的犁沟。
According to the problem of serious partial wear between oil well pump plunger and barrel,metal ceramic coatings with more superior performance of wear resistance and reduction are prepared by in-situ fabrication through laser cladding.The effect of Mo on the interface microstructure and wear properties of the coating is investigated by means of EPMA and wear tests.The results show that adding 5% Mo into the coating improves uniformity,rigidity,wear resistance,refines TiC grains and reduces friction coefficients.TiC grains become bigger,the rigidity and wear resistance of coating decrease with the content of 10% Mo.In TiC/Ni coating there is a way of Mo diffusion and solid solution with TiC phase and bonding phase separately,so the(Ti,Mo)C solid surrounding structure around TiC grain forms and improves the combining force of ceramic phases.The wear mechanism of the coating is anti-wear action of reinforcing phases.The wear morphology is short and shallow furrows.
出处
《石油机械》
北大核心
2008年第12期7-10,84,共4页
China Petroleum Machinery
关键词
抽油泵
柱塞
激光熔覆
原位合成
TiC/Ni复合涂层
耐磨
减磨
oil well pump,plunger,laser cladding,in-situ fabrication,TiC/Ni composite coating,wear resistance,wear reduction
