激光原位合成Ni_3Al金属间化合物覆层及其高温摩擦学性能  

High Temperature Tribological Properties of Ni_3Al Intermetallic Compound Coating Produced by Laser Cladding

作　　者：杨连斌[1] 俞友军[2,3] 赵杰荣[2,3] 周健松[2] 雷自强[1] 陈建敏[2] 

机构地区：[1]西北师范大学化学化工学院,兰州730070 [2]中国科学院兰州化学物理研究所,兰州730000 [3]中国科学院研究生院,北京100049

出　　处：《中国表面工程》2011年第3期28-32,共5页China Surface Engineering

基　　金：国家自然科学基金(51045004);高校博士点专项基金(20050736001)

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1.38×10-4mm3/Nm。Ni3Al intermetallic compound coating was successfully in-situ synthesized by laser cladding on stainless steel surface.Crystalline phase composition and microstructure of the coating were characterized by X-ray diffraction and scanning electron microscopy.It is found that the coatings are composed of Ni3Al single-phase and exhibit good metallurgical bonding between Ni3Al coatings and stainless steel substrats.The tribological properties of the coatings at high temperature are evaluted using pin-on-disk tester.Results show that the coatings have the lowest friction coefficient 0.51 and wear rate 1.38×10-4 mm3/Nm at 500 ℃.

关 键 词：NI3AL 激光熔覆 摩擦磨损 

分 类 号：TG115.58[金属学及工艺—物理冶金] TG174.44[金属学及工艺—金属学]