发动机涡轮导向器叶片掉块分析  

Fracture Failure Analysis of Aero-Engine Turbine Guide-vane

作　　者：李权[1] 张栋[1] 王洪伟[1] 

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《失效分析与预防》2006年第4期23-26,共4页Failure Analysis and Prevention

摘　　要：某发动机试车后,检查发现一片高压涡轮导向叶片排气边掉块。应用扫描电镜、光学显微镜等,对掉块叶片断口及其金相组织进行了系统地分析与检验。结果表明,该叶片掉块性质为烧蚀掉块,烧蚀掉块的原因是叶片排气边局部出现瞬时高温。A piece of the first class high pressure turbine guide-vane fractured in exhaust edge after the engine test. Fracture characteristics and metallurgical structure of the vane were analyzed by means of SEM and optical microscope. The results show that the fracture was resulted by ablating. High temperature of the local exhaust edge of the vane led the vane to ablate and fracture.

关 键 词：涡轮导向器叶片 烧蚀 断裂 高温 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]