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.
出处
《失效分析与预防》
2010年第1期35-38,共4页
Failure Analysis and Prevention
关键词
涡轮叶片
失效分析
振动疲劳
控制措施
turbine blade
failure analysis
vibration fatigue
control measures
