闸片托断裂原因分析及预防  

Fracture Analysis and Prevention of Brake Pad Holder

作　　者：刘鹏[1] 张晓宇[1] 张海军[1] 

机构地区：[1]中国铁道科学研究院机车车辆研究所,北京100081

出　　处：《机械工程师》2013年第2期183-185,共3页Mechanical Engineer

摘　　要：针对闸片托使用过程中突然断裂的现象,进行了金相分析。结果表明,失效是由于在闸片托表层存在大量未被球化的片状石墨组织,在受力时,表层片状石墨处萌生裂纹并扩展,最终造成部件在工作状态中突然断裂。根据片状石墨产生的机理,提出了预防措施。Metallographic analysis of the brake pad holder fracture is carried out. The re, suits indicate that the failure is caused by the considerable unspheroidizing flake graphite organization exists in the surface of the brake pad holder. The surface flake graphile begins to crack and then the cracks expand which finally leads to a sudden fracture of the break pad holder under working state. A preventive measure is proposed according to the forming mechanism of flake graphite.

关 键 词：闸片托 球墨铸铁 片状石墨 金相分析 断裂 预防 

分 类 号：U262.6[机械工程—车辆工程]