(1. 空軍工程大學 工程學院， 西安 710038;
2. 西安建筑科技大學 機電學院， 西安 710055;
3. 西安交通大學 金屬材料強度國家重點實驗室， 西安 710049)
摘 要: 分別在NiCrSiB和CuNiSiB自熔合金粉末中添加WC顆粒，利用氧乙炔焰粉末噴焊工藝制備覆層。用超聲波振動氣蝕儀研究覆層的耐氣蝕性能，用掃描電鏡觀察覆層表面氣蝕破壞形貌。結果表明：復合覆層的耐氣蝕能力比基體材料強。探討了覆層的氣蝕破壞機理。
關鍵字: 氣蝕；噴焊；復合材料；表面防護
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
