一种高强度加长螺栓断裂失效分析  

Failure Analysis on High Strength and Enlarged Bolts

作　　者：许宏飞[1] 张永信[1] 薛跃军[1] 张大江[1] 张书田[1] 

机构地区：[1]中国兵器工业第五二研究所烟台分所,山东烟台264003

出　　处：《物理测试》2008年第5期33-36,共4页Physics Examination and Testing

摘　　要：针对一起高强度加长螺栓在装配过程中发生突然断裂事故,从螺栓断口宏、微观形貌特征入手,通过逐步深入分析,确定螺栓断裂失效的主要模式为氢脆延迟断裂,断裂成因是由于冶炼或浇铸控制存在问题所造成。Be aimed at the crack on the high strength and enlarged bolts, the macro fracto graphy and micro fractography were observed and analysed primarily. By thoughfully analyzing, the results showed that the primary failure mode on bolt was the H2-induced brittleness originated from metallurgical process.

关 键 词：高强度螺栓 失效分析 扫描电镜 金相 沿晶断裂 

分 类 号：TG115.2[金属学及工艺—物理冶金]