发动机涡轮Ⅱ级叶片断裂原因分析  

Failure Analysis of Certain Model AeroengineⅡ Grade Turbine Blade

作　　者：张庆民[1] 张万秋[1] 王立波[1] 

机构地区：[1]中国航空工业集团公司第5711厂,柳河135301

出　　处：《失效分析与预防》2010年第1期35-38,共4页Failure Analysis and Prevention

摘　　要：某航空发动机涡轮Ⅱ级叶片在役其间发生断裂。通过断口宏微观观察、金相组织检查、化学成分及硬度检测等手段确定了叶片断裂性质和原因。结果表明:涡轮Ⅱ级叶片断裂性质为振动疲劳。工作应力、热应力、制造质量、外物损伤、环境损伤都将促进此类故障发生。根据上述结论及影响因素,提出了一系列在修理和使用过程中应采取的控制措施,取得了较好的成效。A grade Ⅱ turbine blade in an aeroengine fractured during service. The fracture mode and cause were analyzed and determined by fracture surface observation, metallurgical structure examination, chemical analysis and hardness testing. Additionally, the preventive measures of such faults were introduced. The results show that the fracture mode of the turbine blade is vibration fracture. Such faults may result from many factors, including working stress, thermal stress, manufacturing quality, foreign body damage and environmental damage. Based on the analysis above, some control measures were proposed, which turned out to be effective.

关 键 词：涡轮叶片 失效分析 振动疲劳 控制措施 

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]