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在燃煤锅炉中 ,用于驱动排灰链条的轴承环 ,在运行过程中突然断裂。对此进行了现场调查和取样 ,并借助于光学和扫描电子显微镜 ,从材料成分、微观组织和性能角度 ,研究了轴承环破裂原因 ,是一种典型的过渡磨损和接触疲劳引起的破坏
In coal-fired boilers, the bearing rings used to drive the ash discharge chain suddenly break during operation. On-site investigation and sampling were carried out. With the help of optical and scanning electron microscopes, the causes of the fracture of the bearing ring were studied from the aspects of material composition, microstructure and properties. It is a typical transitional wear and tear caused by contact fatigue