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材料工程  2019, Vol. 47 Issue (5): 72-78    DOI: 10.11868/j.issn.1001-4381.2018.000409
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
激光熔覆原位自生碳化物增强自润滑耐磨复合涂层的高温摩擦学性能
王勇刚1, 刘和剑1, 回丽2, 职山杰1, 刘海青1
1. 苏州大学 应用技术学院, 江苏 苏州 215325;
2. 沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室, 沈阳 110136
High temperature tribological properties of laser cladding in-situ carbide reinforced self-lubricating wear resistant composite coating
WANG Yong-gang1, LIU He-jian1, HUI Li2, ZHI Shan-jie1, LIU Hai-qing1
1. Applied Technology College of Soochow University, Suzhou 215325, Jiangsu, China;
2. Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang 110136, China
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摘要 利用激光熔覆技术在TC11合金表面成功制备NiCrBSi-Ti3SiC2-CaF2-WC耐磨自润滑涂层。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)分析熔覆层的物相及微观组织;利用显微硬度仪对其硬度进行了测量。分别在室温(25℃),300℃和600℃条件下对涂层进行干滑动摩擦磨损实验,并分析其磨损机理。结果表明:涂层主要由γ-Ni共晶相,M23C6,TiC,(Ti,W)C,Ti5Si3硬质相以及少量的Ti3SiC2,CaF2,TiF3润滑相组成。激光熔覆层的显微硬度大幅度提高,显微硬度平均值为863.63HV0.2,约为基体的2.46倍,熔覆层总体摩擦因数和磨损率明显低于基体,在300℃条件下,涂层具有最低的摩擦因数(0.275)和磨损率(4.8×10-5mm3·N-1·m-1)。
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王勇刚
刘和剑
回丽
职山杰
刘海青
关键词 激光熔覆TC11涂层高温摩擦磨损    
Abstract:The NiCrBSi-Ti3SiC2-CaF2-WC self-lubricating anti-wear composite coating was fabricated on TC11 alloy substrate by laser cladding. The phase compositions and microstructure were invest-igated by X-ray diffractometer (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Microhardness was measured with a microhardness tester. Tribological proper-ties of the fabricated composite coatings were evaluated under dry sliding condition at room-temper-ature (25℃), 300℃ and 600℃, and the wear mechanism was analyzed. The results show that the mi-crostructure of the composite coatings consists of γ-Ni eutectic phase, M23C6,TiC, (Ti,W)C,Ti5Si3 hard phase and some Ti3SiC2,CaF2,TiF3 lubricating phase. The microhardness of laser cladding layer is improved greatly. The average microhardness of the laser cladding coating is 863.63HV0.2, which is 2.46 times of the matrix. The friction coefficient and wear rate are lower than that of the substrate. The lowest friction coefficient and wear rate are 0.275 and 4.8×10-5mm3·N-1·m-1 at 300℃, respectively.
Key wordslaser cladding    TC11    coating    high temperature friction and wear
收稿日期: 2018-04-13      出版日期: 2019-05-17
中图分类号:  TG665  
通讯作者: 回丽(1965-),女,博士,教授,主要从事金属材料性能研究,联系地址:辽宁省沈阳市道义南大街37号沈阳航空航天大学航空制造工艺数字化国防重点学科实验室(110136),E-mail:syhuili@163.com     E-mail: syhuili@163.com
引用本文:   
王勇刚, 刘和剑, 回丽, 职山杰, 刘海青. 激光熔覆原位自生碳化物增强自润滑耐磨复合涂层的高温摩擦学性能[J]. 材料工程, 2019, 47(5): 72-78.
WANG Yong-gang, LIU He-jian, HUI Li, ZHI Shan-jie, LIU Hai-qing. High temperature tribological properties of laser cladding in-situ carbide reinforced self-lubricating wear resistant composite coating. Journal of Materials Engineering, 2019, 47(5): 72-78.
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