【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。更多还原

【Abstract】 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.更多还原