冷轧机轴承的失效分析  

Failure Analysis of Bearing for Cold Rolling Mill

作　　者：孙国雄[1] 徐勇[1] 尹海[1] 沈虹[1] 

机构地区：[1]上海机动车检测中心,上海201805

出　　处：《热加工工艺》2015年第17期247-248,共2页Hot Working Technology

摘　　要：冷轧机使用一段时间后第四滚子组的销子发生断裂失效现象。采用扫描电镜、金相、硬度、化学成分测试对失效件进行了综合分析。结果表明,滚子与外圈不良接触导致其接触部位产生磨损,滚子内的固定销承受较高的扭转应力并使其发生疲劳断裂。The pins in the fourth roller group of the cold rolling mill fractured after servicing for a period of time. The failure part was synthetically analyzed by using scanning electron microscope, metallographic test, and hardness test, chemical composition measurement. The results indicate that bad contact between roller and outer ring causes the wear of its contact site, and then fixed pins in roller encounters high torsional stress, which leads to fatigue fracture of pins.

关 键 词：冷轧机 固定销 磨损 扭转应力 

分 类 号：TG333.17[金属学及工艺—金属压力加工]