HT200制动鼓的失效分析及其新材质的研制  

Failure Analysis of HT200 Wear Brake Drum and Improvement of Its Material

作　　者：程和法[1] 黄笑梅[1] 陈翌庆[1] 苏勇[1] 

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

出　　处：《机械工程材料》2001年第10期36-38,共3页Materials For Mechanical Engineering

摘　　要：通过对HT2 0 0汽车制动鼓宏观及微观失效形式的分析 ,认为引起制动鼓失效的原因是制动时的强烈摩擦而使制动面上产生拉应力及反复受热 ,其失效机制是在拉应力和热疲劳共同作用下表层产生裂纹并不断扩展 ,以及由摩擦造成的热磨损。通过加入Cu、Cr元素进行微合金化处理改善了制动鼓显微组织和力学性能 ,以提高制动鼓的工作寿命。Through macro and micro examination of the damaged wear brake drum of HT200, it was believed that the cause for the failure of wear brake drum was frequent creation of tensile stress and heating in the surface because of strong friction during braking. The mechanism resulting in the failure of wear brake drum was that the cracks in the surface were initiated and extended by tensile stress combined with thermal fatigue, and heavy wear of the working face at elevated temperature resulted from friction. The microstructrue and mechanical properties of wear brake drum were improved by means of microalloying with Cu and Cr to increase its service life.

关 键 词：制动鼓 失效分析 微合金化 汽车 研制 灰口铁 

分 类 号：U463.55[机械工程—车辆工程]