高壓渦輪葉片表面起皮故障分析

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Abstract：The working blades ofacertain engine's high-pressure turbine are made of nickel-based single crystal superalloy.To enhance their high-temperature corrosionresistance，theblade surface iscoated withaNiCrAlY + AINiY composite coating using arc ion plating technology.After the engine testrun，peeling occurred on the surface of the blade body.Through macroscopic and microscopic inspections，combined with the engine disassembly，an analysis was conducted onthe peling failure of the high-pressure turbine working blade surface.The cause of the failure was found to be wear and tear of the sealing coating on the inner side of the compressor working ring.The peeled coatingadhered to the blade's suction side after high-temperature oxidation，forming a grayish-black deposit.

Keywords： single-crystal turbine blade; arc ion plating coating; composite coating

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鎳基高溫合金具有優(yōu)越的高溫力學(xué)及抗蠕變性能，已被廣泛應(yīng)用于航空航天、艦船及動(dòng)力發(fā)電等領(lǐng)域，用以制造先進(jìn)航空發(fā)動(dòng)機(jī)、地面燃?xì)獍l(fā)動(dòng)機(jī)渦輪葉片等高溫部件。（剩余4938字）