复合涂层摩擦学特性
( 1. 上海交通大学 材料学院， 上海 200030；
2. 装甲兵工程学院 装备再制造技术国防科技重点实验室， 北京 100072；
3. 中国科学院 兰州化学物理研究所 固体润滑国家重点实验室， 兰州 730000)
摘 要: 使用THT07-135高温磨损实验机对高速电弧喷涂FeAl, Fe-Al/Cr3C2，FeAlCr/Ni包Cr3C2复合涂层进行了滑动摩擦特性的研究，并用SEM、TEM、XRD等手段观察分析了磨痕的形貌和成分、涂层截面的组织和相结构。 结果表明：FeAlCr/Ni包Cr3C2复合涂层具有典型的层状结构和较高的结合强度和硬度；从室温到250 ℃，涂层的抗磨损性能下降；从250 ℃到550 ℃，涂层磨损性能变化不大；550 ℃以后，涂层的耐磨损性能重新增强；剥层磨损是FeAlCr/Ni包Cr3C2涂层高温磨损的主要机理；Cr3C2增强相的加入，大大提高了涂层的耐磨损性能；Ni的加入一定程度提高了涂层的结合强度和抗磨损性能。
关键字: 高速电弧喷涂； 摩擦学特性； FeAlCr/Ni包Cr3C2复合涂层
（ 1. School of Materials Science and Engineering， Shanghai Jiaotong University，Shanghai 200030, China;
2. National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China;
3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences, Lanzhou 730000, China）
Abstract: THT07-135 high temperature wear machinery was used to analyse tribological properties of high velocity arc sprayed FeAl, Fe-Al/Cr3C2, FeAlCr/Ni wrapped Cr3C2 composite coatings. The wear scar morphologies and compositions of coatings were analyzed by SEM, TEM and XRD methods. Results show that FeAlCr/Ni wrapped Cr3C2 composite coatings have typically layer shaped structure and relatively high bonding strength and hardness. The wear resistance of coatings decreases in the range from room temperature to 250 ℃, and it changes little in the range from 250 ℃ to 550 ℃, then wear resistance of coatings rises again after 550 ℃.Shell tribology behavior is mainly the high temperature wear mechanism of coatings. The addition of Cr3C2 can improve the wear resistance of coatings highly; the addition of Ni can also relatively enhance bonding strength and wear properties of coatings.
Key words: high velocity arc spray； tribological characteristic; FeAlCr/Ni wrapped Cr3C2 composite coating
