摩托车刹车毂失效分析
Failure Analysis of Brake Drum in Motorcycle
李成明，谭莹，莫明珍
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作者单位：广东出入境检验检疫局检验检疫技术中心
中文关键字：刹车毂；弹簧；失效分析
英文关键字：Brake drum;Spring ;Failure analysis
中文摘要：运用宏观分析、显微组织检查、断口分析、化学成份与硬度测试等手段对摩托车上的刹车毂进行了失效分析，结果表明摩托车刹车毂断裂是由弹簧最先断裂引起，而弹簧材料牌号错误及硬度过高，表面质量差，是导致该弹簧早期疲劳断裂的主要原因。
英文摘要：By means of macroscopic and microstructure examination, fractography, Chemical composition testing,hardness testing and so on, the failure of the brake drum in motorcycle was analyzed. The results show that brake drum fracture was caused by spring first fracture. The wrong steel grades of spring material and high hardness and poor of the surface quality are the main reasons for fatigue fracture of spring.