| 摘要: |
| 利用激光熔覆技术在不锈钢基材表面原位合成了Ni3Al金属间化合物覆层。用XRD和SEM分析了覆层的相组成和组织结构。在CSM栓盘摩擦磨损试验机上对覆层的高温摩擦磨损性能进行了测试。结果表明：覆层由单相Ni3Al金属间化合物组成；覆层与基材呈良好的冶金结合；覆层的摩擦因数和磨损率在500 ℃时具有最低值，分别为0.51和1.38×104mm3/Nm。 |
| 关键词: Ni3Al 激光熔覆 摩擦磨损 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(51045004)；高校博士点专项基金(20050736001) |
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| High Temperature Tribological Properties of Ni3Al Intermetallic Compound Coating Produced by Laser Cladding |
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YANG Lian-bin, YU You-jun, ZHAO Jie-rong, ZHOU Jian-song, LEI Zi-qiang, CHEN Jian-min1,2,3
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1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070;2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000;3. Graduate University of Chinese Academy of Sciences, Beijing 100049
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| Abstract: |
| Ni3Al intermetallic compound coating was successfully insitu synthesized by laser cladding on stainless steel surface. Crystalline phase composition and microstructure of the coating were characterized by Xray diffraction and scanning electron microscopy. It is found that the coatings are composed of Ni3Al singlephase and exhibit good metallurgical bonding between Ni3Al coatings and stainless steel substrats. The tribological properties of the coatings at high temperature are evaluted using pinondisk tester. Results show that the coatings have the lowest friction coefficient 0.51 and wear rate 1.38×104mm3/Nm at 500 ℃. |
| Key words: Ni3Al laser cladding friction and wear |
