3Cr13不锈钢弹片断裂分析  

Failure Analysis of 3Cr13 Stainless Steel Reed

作　　者：王祺[1] 王大为[2] 赵文侠[1] 于洋[1] 

机构地区：[1]北京航空材料研究院中国航空工业集团公司失效分析中心试金石检测技术有限公司,北京100095 [2]成都飞机工业(集团)有限责任公司,成都610092

出　　处：《失效分析与预防》2011年第4期257-260,共4页Failure Analysis and Prevention

摘　　要：3Cr13马氏体不锈钢所制弹片在工作306 min后返厂复试,复试试验中发生断裂。利用微距照相机和扫描电镜对失效弹片断口和侧面、失效弹片人工断口、未失效弹片的人工断口进行宏观和微观观察,并用能谱仪对个别区域进行成分分析,利用显微硬度计对两种弹片进行了硬度检测。结果表明:弹片受到应力腐蚀作用,萌生沿晶裂纹,之后发生疲劳扩展,导致弹片断裂失效;建议加强弹片使用前的存放管理,避免受到腐蚀介质的侵蚀。A 3Cr13 stainless steel reed fractured after service for several hours.In order to find out the failure mode and cause, macro and micro observation on original and man-made fracture surfaces,energy spectrum analysis,and hardness testing were carried out.In addition,analysis of the man-made fracture surface and hardness testing of an intact reed was also carried out. The results show that inter-granular crack initiated due to stress corrosion,and then the crack propagated as a fatigue crack, resulting in the fracture.Keeping the parts away from corrosion media can effectively prevent the type of failure.

关 键 词：3Cr13 弹片 应力腐蚀 沿晶裂纹 

分 类 号：TS914.12[轻工技术与工程]