Wear Part Repairing of Aircraft Refueling Probe Guide Rail by High-Velocity Oxygen Fuel Sprayed WC-17Co Alloy Coating
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摘要: 某型飞机燃油接受探管外筒导轨镀铬层发生磨损剥落，采用超音速火焰（HVOF）喷涂WC-17Co合金涂层对其进行修复，研究了HVOF涂层的微观形貌、力学性能和耐磨性能，并对导轨修复的燃油接受探管进行了20次全行程收放转换模拟试验、30次地面运行试验和50次空中飞行运行试验。结果表明：HVOF涂层的硬度高达1 041 HV，与导轨基体的结合强度大于85.4 MPa，涂层韧性良好，耐磨性能优于电镀铬层的，且与化学镀镍磨轮配对时的对磨表面磨损程度很小；修复导轨组装的探管在收放转换模拟试验和运行试验后，其HVOF涂层均未见磨损现象，修复导轨的使用状态良好。
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关键词:
- 超音速火焰喷涂 /
- 燃油接受探管 /
- 损伤修复 /
- WC-17Co合金涂层
Abstract: A certain type aircraft refueling probe was subjected to wear and spalling in the chrome-plated layer of the extenal guide rail. WC-17Co alloy coating by high-velocity oxygen fuel (HVOF) spraying was used to repair the guide rail. The micromorphology, mechanical properties and wear resistance of the HVOF coating was studied. The refueling probe with the repaired guide rail was subjected to 20 full-stroke extending and retracting simulation tests, 30 ground running tests and 50 air flight running tests. The results show that the hardness of the HVOF coating was up to 1 041 HV and the bonding strength with the guide rail substrate was greater than 85.4 MPa. The toughness of the coating was good, the wear resistance was higher than that of electroplated chrome layer, and the wear degree of the grinding surface was small when paired with the electroless nickel plated wheel. After extending and retracting simulation tests and running tests of the probe assembled with the repaired guide rail, the HVOF coating on the guide rail showed no wear features and the repaired guide rail was in good condition. -
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