发动机防喘引接管断裂分析  

Fracture Analysis of Aero-engine Antisurge Lead Pipe

作　　者：郑真 陈星 张爽 

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]航空工业失效分析中心,北京100095 [3]航空材料检测与评价北京市重点实验室,北京100095 [4]材料检测与评价航空科技重点实验室,北京100095 [5]中国航发西安航空发动机有限公司,西安710021

出　　处：《失效分析与预防》2018年第2期124-129,共6页Failure Analysis and Prevention

摘　　要：飞机发动机在空中飞行时发生喘振现象,地面检查发现发动机防喘引接管断裂,该现象发生数次。通过宏微观观察、能谱分析、金相检查及显微硬度检测,对引接管的断裂性质和原因进行分析。结果表明:引接管断裂性质为应力腐蚀开裂,随后在交变应力下发生疲劳扩展,最终导致断裂。综合分析引接管的断裂情况,从引接管材质、应力状态和使用环境等方面寻找原因,并提出相应的改进建议。The gasping phenomenon occurs when the aircraft engine is flying in the air,inspection on ground shows that the engine's antisurge lead pipe is broken,and this phenomenon occurs several times.In order to find out the failure mode and cause,macro and micro observation,EDS analysis,microstructure examination and microhardness test were carried out on antisurge lead pipe.The results show that the fracture mode of antisurge lead pipe is stress corrosion cracking,following with fatigue expansion in alternating stresses,leading to failure fracture eventually.This study analyzes the fracture condition of the antisurge lead pipe,finds out the causes from the aspects of the material quality,the stress condition and the using environment.Based on the analysis results,the corresponding improvement suggestions are put forward.

关 键 词：防喘引接管 0CR18NI9钢 应力腐蚀 疲劳 焊接 

分 类 号：V233.95[航空宇航科学与技术—航空宇航推进理论与工程]