超音速等离子喷涂WC-Co涂层的冲蚀磨损机理研究  

Study on Erosion Wear Mechanisms of WC-Co Coatings Prepared by Supersonic Plasma Spraying

作　　者：蔡江[1] 魏伟[1] 王海军[2] 

机构地区：[1]北京矿冶研究总院,北京100045 [2]装甲兵工程学院装备再制造国防科技重点试验室,北京100072

出　　处：《有色金属（冶炼部分）》2006年第z1期57-61,73,共6页Nonferrous Metals（Extractive Metallurgy)

摘　　要：用超音速等离子喷涂(HEPJet)和两种进口高速氧燃气火焰喷涂设备(JP-5000和DJ-2700)制备WC-Co涂层,进行了30(°)和90(°)攻角的冲蚀磨损对比试验,分析了涂层的SEM磨损形貌。结果表明超音速等离子喷涂WC-Co涂层抗冲蚀性能与JP-5000相当,要优于DJ-2700;在30(°)冲蚀磨损条件下,WC-Co涂层的失效行为表现为疲劳剥落和微切削2种特征;在90(°)冲蚀磨损时,涂层的失效主要是垂直表面的磨粒冲击力导致涂层疲劳剥落。The WC-12Co coatings were sprayed by different super-sonic thermal spraying processes of Supersonic Plasma Spraying(HEPJet) and two kind of HVOF(JP5000,DJ-2700).The contrast test erosion of 30(°) or 90(°) jet angle are carried out,and the surface SEM morphology of coatings is also analyzed.The results showed that the WC-Co coatings' main properties by the Super-sonic Plasma Spray was equivalent to JP-5000,and better than DJ-2700.At 30(°) jet angles,erosion wear behavior of WC-Co coating present the characteristics of micro-cutting and scale exfoliation;At 90(°) jet angles,the coatings present the fatigue desquamate due to the upright wallop of particles on the coating surface.

关 键 词：超音速等离子喷涂 HVOF WC-CO涂层 冲蚀磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]