超音速等离子喷涂WC-Co涂层性能研究

Study on the Performance of Supersonic Plasma Sprayed WC-12Co Coatings

用超音速等离子喷涂（HEPJet）和2种进口高速氧燃气火焰喷涂设备（HVOF：JP-5000和DJ-2700）制备WC—Co涂层，进行了孔隙率、显微硬度、结合强度及30°和90°攻角的冲蚀磨损对比试验，用XRD分析了粉末和涂层的相结构，用SEM分析了粉末和涂层的表面和断面形貌。结果表明3种工艺制备的WC-Co涂层与粉末的相结构类似，均无明显氧化、失碳；超音速等离子喷涂WC-Co涂层综合性能与JP-5000相当，要优于DJ-2700。

WC-Co coatings are prepared by using the supersonic plasma spray （ HEPJet ） and two kinds of imported high speed oxygen burn equipment of flame spraying （ HVOF： JP-5000 and D J-2700） ; Comparison tests are carried out on hole rate, microscopically hardness, combination strength and 30° with 90° attack angle rush ; the appearance structure of powder and coatings are analyzed with XRD ; and the section shape, surface of powder and coating are analyzed with SEM. The results show that the surface structures of powder and the WC-Co coatings of 3 kinds of technology preparation are similar without obvious oxidize and carbon lose. The integral performance of supersonic plasma spray WC - Co coating matches with that of JP - 5000 and is fairly better than DJ-2700.