【摘要】 采用反应氮弧熔覆技术在Q235A钢试件表面原位合成了Ti(CN)/Fe金属陶瓷复合涂层。利用扫描电镜、XRD射线衍射仪、显微硬度计、摩擦磨损试验机、电化学工作站分析了涂层形貌、涂层物相、涂层显微硬度及其耐磨耐蚀性能,并与Q235A钢进行了硬度、耐磨耐蚀对比试验。结果表明:涂层主要由Ti(CN)、Fe及少量的TiO2相组成,Ti(CN)呈细小颗粒状,涂层为良好的冶金结合;与Q235A钢相比,硬度提高了约3倍,摩擦系数约为Q235A的2/3,磨损量约为Q235A的1/2;在5%H2SO4溶液中,Ti(CN)涂层的腐蚀速率约为Q235A的1/3,在3.5%NaCl溶液中,Ti(CN)涂层的腐蚀速率约为Q235A钢的1/4。更多还原

【Abstract】 The in-situ synthesis of Ti( CN) /Fe composite coating was prepared on Q235A steel specimen by reaction nitrogen arc cladding technique. The morphology,phase,microhardness and wear and corrosion resistance of the Ti( CN) / Fe coating were analyzed by scanning electronic microscope,X-ray diffractometer,microhardness tester,abrasion machine and electrochemical workstation. Contrast test of microhardness,wear and corrosion resistance behavior had been done between Q235A steel and the coating. The results show that the coating is composed of Ti( CN) / Fe and small amount of TiO2. Ti( CN) is showed fine granular shape,and good metallurgical bonding can be obtained. Compared with Q235A steel,the microhardness of the coating is improved by about 3 times,the frictional coefficient is about 2 /3 times and the wear loss is about 1 /2 times of the Q235A steel. The corrosion rate of Ti( CN) coating is about 1 /3 times in 5% H2SO4solution and about 1 /4 times in 3. 5% NaCl solution of the Q235A steel.更多还原