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某航空发动机工作到大寿命时,一级涡轮导向器隔热屏NiCr-Cr3C2涂层裂纹故障率高达80%,因此研究热端部件NiCr-Cr3C2涂层修复技术成为目前一项急待解决的问题。为提高航空发动机热端部件抗腐蚀、抗高温氧化、抗磨损等能力,延长机件使用寿命,通常采取在发动机热端部件喷涂具有耐蚀、高温抗氧化、耐磨损等功能的防护涂层[1]。由于设计原因,某航空发动机在工作过
When an aeroengine works to a long service life, the failure rate of the NiCr-Cr3C2 coating in the first-stage turbine guide heat shield reaches as high as 80%, so it is an urgent issue to study the repairing technology of NiCr-Cr3C2 coating on the hot end part . To improve the aeroengine hot end parts corrosion resistance, high temperature oxidation, anti-wear and other capabilities to extend the service life of the parts, usually taken in the hot end of the engine parts spray coating with corrosion resistance, high temperature oxidation resistance, wear resistance and other protective coating [1]. Due to design reasons, aeroengine is at work