摘要
采用反应等离子喷涂技术在ZL104合金基体上依次沉积NiCrAl黏结层和TiN复相涂层,通过X射线衍射、组织观察、硬度测试、拉伸及磨损试验等方法研究了涂层的物相组成、微观形貌、结合强度、硬度及耐磨性能,并探讨了磨损机制。结果表明:复相涂层由TiN、TiN0.3和少量TiO2组成,其组织致密,存在少量孔隙和微裂纹;涂层与ZL104合金结合良好,结合强度达17.7MPa;TiN复相涂层的平均显微硬度为1330HV,约为基体的22倍,磨损量随载荷的增加而增加,且远小于基体的;ZL104合金的磨损机制为微切削磨粒磨损和微疲劳磨损,TiN复相涂层的为微切削磨粒磨损。
NiCrAl alloy adhisive coating and TiN composite coating were in turn deposited by reactive plasma spraying on ZL104alloy substrate.The phase composition,microstructure,bonding strength,micro-hardness and wear resistance of the coating were studied by X-ray diffraction,structure observation,hardness test and tensile and wear test,and the wear mechanism was also discussed.The results show that the composite coating consisted of TiN,TiN0.3and a small amount of TiO2phases,and its structure was dense with a few cavities and microcracks.The coating and ZL104alloy was well bonded,and the bonding strength was 17.7MPa.The average hardness of the TiN composite coating was 1330HV,which was about 22times of the substrate;the wear mass loss of the TiN composite coating increased with the load,and was much smaller than that of the substrate.The wear mechanism of ZL104alloy was micro-cutting abrasive wear and micro-fatigue wear,while that of the TiN composite coating was micro-cutting abrasive wear.
作者
石颖
王泽华
张宇
邵延凡
顾宸瑜
SHI Ying;WANG Zehua;ZHANG Yu;SHAO Yanfan;GU Chenyu(College of Mechanics and Materials,Hohai University,Nanjing 211100,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2020年第4期72-77,共6页
Materials For Mechanical Engineering
基金
中央高校基本科研业务费专项资金资助项目(2019B77014)
江苏省研究生实践创新计划项目(SJCX19-0148)。
关键词
反应等离子喷涂
铝合金
TiN复相涂层
耐磨性
reactive plasma spraying
aluminum alloy
TiN composite coating
wear resistance
