汽车制动鼓的失效分析  

Failure Analysis on Brake Drum of Automobile

作　　者：苏勇[1] 叶天汉[2] 陈翌庆[1] 黄光伟[2] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]合肥江淮铸造有限责任公司,安徽合肥231137

出　　处：《铸造技术》2004年第5期349-350,352,共3页Foundry Technology

基　　金：合肥市重点科研项目资助 ;编号 :合科工 2 0 0 3 1 7

摘　　要：随着汽车载重和速度的增加 ,使得所需要的制动鼓材料应当发展同时具有高强度、高抗热疲劳性和良好的硬度。通过对失效的江淮某汽车制动鼓取样分析 ,其失效原因 :①材料强度、硬度过低 ,制动鼓出现磨痕台阶和轴向裂纹 ;②在制动时发生组织转变 ,进一步促使网状裂纹的产生。With increase of automobile’s load and speed, it is stressed that material of brake drum has been developing and has high strength, anti-fatigue, good hardness. Through analysis on the failure specimen of automobile brake drum the reasons to failure are as follows: (1) The hardness and strength of brake drum is not high enough so that grinding trace and crack of axis direction appear. (2) The reticulation crack is caused by the phase transformation during braking.

关 键 词：制动鼓 显微组织 失效 

分 类 号：U463[机械工程—车辆工程]