一九七九年十二月某发动机在工厂试车分解检查时,发现压气机一级转子叶片进气边缘有坑点。经目视检查该坑点与机械损伤点有明显区别。一、坑点的性质该发动机工作总时间为187分。试车前,我们对一级压气机叶片进行了全面外观检查,均无腐蚀。其故障叶片的宏观状态是:坑点集中分布在进气边缘叶根1/3以上处,坑点较致密, In December 1979, when an engine was decommissioned at a factory test run, it was found that there was a pit on the inlet edge of the compressor rotor blade. Visual inspection of the pit and the point of mechanical damage were significantly different. First, the nature of the pit The total working hours of the engine was 187 points. Before commissioning, we conducted a thorough visual inspection of the first-stage compressor blades with no corrosion. The failure of the macro state of the blade is: pits concentrated in the inlet edge of the root 1/3 at the pit point more dense,