铁路车辆钩舌故障分析  

Failure Analysis on Coupler Knuckle of Railway Vehicle

作　　者：朱成九[1] 朱爱华[2] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013 [2]华东交通大学机电工程学院,江西南昌330013

出　　处：《华东交通大学学报》2012年第3期80-82,共3页Journal of East China Jiaotong University

摘　　要：通过对某铁路车辆故障钩舌进行断口分析、钩舌钢中非金属夹杂物检测、补焊处金相组织检测、断面金相组织检测、钩舌基体组织检测以及钩舌基体硬度检测,结果表明:钩舌原始组织中非金属夹杂物晶粒粗大,热处理不良,补焊后存在微裂纹,抗裂纹能力较差是导致钩舌发生断裂的原因。Aiming at the fault coupler knuckle of a railway vehicle, the paper conducts a fracture analysis, and makes some detection including coarse grains of nonmetallic impurities in the original structure of the coupler knuckles, metallographic structure of the repaired welds and cross section, matrix structure and hardness of the coupler knuckles. The results show that coarse grains of nonmetallic impurities in the original structure of the coupler knuckles are so large without good treatment; and that tiny cracks exist even after welding, with unsatisfying ability to resist cracks, which is the main reason of cracks.

关 键 词：钩舌 检测 故障 

分 类 号：U270.34[机械工程—车辆工程]