(1. 空军工程大学 工程学院， 西安 710038;
2. 西安建筑科技大学 机电学院， 西安 710055;
3. 西安交通大学 金属材料强度国家重点实验室， 西安 710049)
摘 要: 分别在NiCrSiB和CuNiSiB自熔合金粉末中添加WC颗粒，利用氧乙炔焰粉末喷焊工艺制备覆层。用超声波振动气蚀仪研究覆层的耐气蚀性能，用扫描电镜观察覆层表面气蚀破坏形貌。结果表明：复合覆层的耐气蚀能力比基体材料强。探讨了覆层的气蚀破坏机理。
关键字: 气蚀；喷焊；复合材料；表面防护
WC/nickel-based and WC/copper-based
composite coatings
（1. School of Engineering，Air Force Engineering University，
Xi′an 710038, China;
2. School of Mechanics and Electronics Engineering，
Xi′an University of Architecture and Technology，Xi′an 710055, China;
3. State Key Laboratory for Mechanical Behavior of Material，
Xi'an Jiaotong Uni versity，Xi′an 710049, China）
Abstract:The coatings were made by flame spray welding with self-fluxing alloy powder, NiCrSiB and CuNiSiB, in which WC particle was added. The coating's cavitation erosion was investigated with ultrasonic vibration cavitation instrument. The coating's cavitation erosion morphology was observed with SEM. Results show that the cavitation erosion resistance of composite coatings is better than that of base alloy. Cavitation erosion mechanism of the test coatings was also discussed.
Key words: cavitation erosion; spray welding; composite; surface protection
