摘要
目的探究TiAlSiN涂层经过不同热震次数后,其组织结构及性能的变化规律及机制。方法采取电弧离子镀技术在单晶硅和M2高速钢(W6Mo5Cr4V2)表面沉积TiAlSiN涂层,采用加热-水淬循环的方法进行热震试验。采用3D表面轮廓仪、扫描电子显微镜(SEM)表征涂层显微形貌,用金相显微镜测定膜/基结合力,用能谱仪(EDS)分析涂层元素含量变化,用X射线衍射仪(XRD)表征物相结构,用划痕仪和硬度计测量涂层力学性能,用摩擦磨损试验仪、光学显微镜探究涂层摩擦学性能及摩擦磨损机制。结果随着热震次数的增加,涂层表面产生的TiO颗粒尺寸增大,含量增多,粗糙度增加。XRD衍射峰向小角度发生偏移,但仍保持立方结构。涂层的力学性能变差,硬度值由2066HV0.025下降至1447HV0.025,结合力由常温的71.8 N下降至33.9 N,结合力等级由常温的HF1降至HF4。此外,30、40、50次热震后,涂层展现出比常温下更优异的耐磨性能,摩擦系数由常温的0.571分别降低至0.427、0.389、0.273,磨损率由常温时的1.4×10^-14 m^3/(N·m)分别降至1.01×10^-14、0.93×10^-14、0.71×10^-14m^3/(N·m),磨损类型主要为粘着磨损与氧化磨损。结论 TiAlSiN涂层在600℃下具备优异的抗热震性能,多次冷-热循环后仍为立方结构。随着热震次数的增加,TiAlSiN涂层表面质量及力学性能下降,但摩擦磨损试验中,由于涂层表面多次热震形成的氧化物起到润滑效果,有效减缓了涂层与摩擦球的剧烈接触,使TiAlSiN涂层的耐磨减摩性能提高。
The work aims to investigate the change rules and mechanism on microstructure and properties of TiAl Si N coating after different thermal shock times. Arc ion plating was used to deposit TiAlSiN coating on the surface of monocrystalline silicon and M2 high-speed steel(W6 Mo5 Cr4 V2) and thermal shock test was carried out by heating-water quenching cycle. The microstructure of the coating was characterized by 3 D surface profilometer and scanning electron microscopy(SEM). Metallographic microscope was used to determine coating adhesion, EDS was used to analyze the change of coating element content, X-ray diffractometer(XRD) to characterize the phase structure and scratch tester and hardness tester to measure the mechanical properties of the coating. The tribological properties and mechanism of coatings were studied by friction wear tester and optical microscope. With the increase of thermal shock times, TiO particles produced on the surface of the coating became larger in size, content and roughness. The XRD peak shifted to small angle, but it was still cubic structure. The mechanical properties of the coating became worse, and the hardness value decreased from 2066 HV0.025 to 1447 HV0.025, the binding force decreased from 71.8 N to 33.9 N at room temperature, and the binding force level decreased from HF1 to HF4 at room temperature. In addition, after 30, 40, 50 thermal shock tests, the coating exhibited more excellent wear resistance than that at normal temperature and the friction coefficient decreased from 0.571 to 0.427, 0.389, 0.273. The wear rate decreased from 1.4×10^-14 m^3/(N·m) to 1.01×10^-14 m^3/(N·m), 0.93×10^-14 m^3/(N·m), 0.71×10^-14 m^3/(N·m) at room temperature and the main wear types were adhesive wear and oxidation wear. TiAlSiN coatings show excellent thermal shock resistance at 600 ℃ and can maintain cubic structure after repeated cold-heat cycles. With the increase of thermal shock times, the surface quality and mechanical properties of TiAlSiN coating decrease. However, in the fric
作者
宋智辉
代明江
李洪
林松盛
石倩
韦春贝
郭朝乾
苏一凡
SONG Zhi-hui;DAI Ming-jiang;LI Hong;LIN Song-sheng;SHI Qian;WEI Chun-bei;GUO Chao-qian;SU Yi-fan(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China;National Engineering Laboratory of Modern Materials Surface Engineering Technology,Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangdong Institute of New Materials,Guangzhou 510651,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2019年第11期297-304,319,共9页
Surface Technology
基金
国家重点研发计划项目(2016YFB0300400)
广东省科技计划项目(2017A050506037)
广东省科技厅项目(2017A070701027)
2017年广东省科学院科技提升项目(2017GDASCX-0111,2017GDASCX-0202)
广东省工业技术研究院创新能力建设项目(2014B070705007)~~
关键词
离子镀
TiAlSiN
热震
高温
结合力
耐磨性
arc ion plating
TiAlSiN
thermal shock
high temperature
adhesion
wear resistance
