摩托车变档轴断裂原因分析  

Analysis on Fracture of Gear-shift Shaft of Motorcycles

作　　者：陈明[1] 谭莹[1] 曹标[1] 莫明珍[1] 周崎[1] 李小敏[1] 

机构地区：[1]广东出入境检验检疫局技术中心,广州510623

出　　处：《小型内燃机与摩托车》2007年第5期94-96,共3页Small Internal Combustion Engine and Motorcycle

摘　　要：对断裂的摩托车变档轴进行宏观、金相、化学及断口分析。结果表明变档轴由于调质处理不当致使基体中分布块状及网状分布的铁素体,导致变档轴的韧性及强度下降,在过载扭力的作用下发生扭转断裂。Analysis on macro, metallography, chemistry and fracture appearance were carried out on broken gear - shift shaft in motorbike. The results show that blocks and network of ferrite existed in the base of gear - shift shaft due to improper quenching - and - tempering. It reduces the toughness and intensity of the shaft, that leaded to the torsion fracture of gear - shift shaft under over - torsion stress.

关 键 词：变档轴 扭转断裂 调质处理 失效分析 

分 类 号：TH133.4[机械工程—机械制造及自动化]