35CrMo高强度连接螺栓杯锥状断口失效分析  

Failure Analysis of Cup-cone Fracture of 35CrMo High Strength Bolt

作　　者：王德宝[1] 张峰[1] 浦红[1] 宋祖峰[1] 杨丽珠[1] 方政[1] 

机构地区：[1]马鞍山钢铁股份有限公司

出　　处：《安徽冶金》2014年第3期22-25,共4页Anhui Metallurgy

摘　　要：针对35CrMo高强度连接螺栓在装配过程中发生杯锥状断裂事故,采用化学分析、金相、硬度和扫描电镜等试验手段对失效件进行了检验分析。结果表明:螺栓芯部明显的马氏体带状组织以及沿纵向集中分布的大量夹杂物是造成35CrMo高强度连接螺栓装配过程中突然断裂的主要原因。Cup-cone fracture failure occurred on the 350rMo high strength bolt during assembly process; the failed bolt was inspected and analyzed by means of chemical analysis, metallographic, hardness and SEM examination. Re- sults showed that martensite banded structure at the centre region and lots of longitudinally distributed inclusions had been the main cause of the sudden fracture of the 35CrMo high strength bolt.

关 键 词：高强螺栓 锥杯状断口 失效分析 马氏体带状组织 

分 类 号：TG133[一般工业技术—材料科学与工程]