理化检验-物理分册2024，Vol.60Issue(5)：66-69,4.DOI:10.11973/lhjy-wl202405017
轧机机架辊轴承外圈断裂原因
Reasons for outer ring fracture of rolling mill stand roll bearing
董登超 1王晓东 1张继明 1杨浩1
作者信息
- 1. 江苏省(沙钢)钢铁研究院,张家港 215625
- 折叠
摘要
Abstract
A fracture accident occurred on the outer ring of the roller bearing in the wide and thick plate workshop of a certain steel plant.The causes of bearing outer ring fracture were analyzed using methods such as macroscopic observation,chemical composition analysis,mechanical performance testing,metallographic examination and scanning electron microscopy analysis.The results show that the bearing seat was deformed,led to partial loading of the bearing.The bearing rollers were subjected to abnormal axial forces,and the edge of the outer ring raceway of the bearing was subjected to heavy loads from the rollers,resulting in stress concentration.The material of the outer ring of the bearing was brittle,causing microcracks to form in the material.The cracks extended towards the inside of the raceway,ultimately led to the fracture of the outer ring of the bearing.关键词
轴承外圈/断裂/GCr15SiMn钢/脆性/偏载/回火马氏体Key words
bearing outer ring/fracture/GCr15SiMn steel/brittleness/partial load/tempered martensite分类
通用工业技术引用本文复制引用
董登超,王晓东,张继明,杨浩..轧机机架辊轴承外圈断裂原因[J].理化检验-物理分册,2024,60(5):66-69,4.
