【摘要】 利用反应氮弧熔覆技术,以Ti粉、石墨粉作为Ti源和C源,以N2兼作保护气和反应气体,在Q235试件基体上制备了厚度为2mm的TiCN/Fe金属陶瓷涂层。利用KYKY-2800B型扫描电镜、D/max-RA型X射线衍射仪、HSR-2M型往复式摩擦磨损试验机和MH-6型显微硬度计等分析了不同氮气流量对涂层显微组织、物相组成、显微硬度和耐磨性的影响。结果表明:氮气流量为20L/min时熔覆层的显微组织成型良好,TiCN增强相颗粒连续均匀的分布在枝晶上或枝晶之间,涂层最大显微硬度为HV0.51610,约为基体硬度的4倍左右,涂层摩擦性能优异。更多还原

【Abstract】 TiCN/Fe metal ceramic coating was prepared on the surface of Q235steel substrate by reaction nitrogen arc cladding technology which takes Ti powder,graphite powder as Ti source and C source,and N2 gas as protective and reactive gas.Influence of nitrogen flow on the microstructure and properties of Ti(CN)ceramic coating were studied.The microstructure,phase composition,micro hardness and wear resistance were investigated by scanning electron microscope(SEM),X-ray diffraction(XRD),microhardness tester and reciprocating friction testing machine.The results show that the composite coating is metallurgically bonded to the substrate,the maximum microscopic hardness of the coating is HV0.5 1610,which is about 4times of the substrate hardness and friction performance of the coating is good,when the nitrogen flow is 20L/min.更多还原