The life time of rollers in the hot rolling of steel was studied by analyzing the initiation and propagation of vertical short cracks due to rolling contact fatigue(RCF) in the backup roller steel.

• 采用光学显微镜跟踪测量法研究了支承辊钢滚动接触疲劳垂直短裂纹的形成和不扩展特性。结果表明:这种短裂纹生成很快、初始扩展速率非常高,但很快就停止扩展;