Performance of a Carburizing Bearing Steel After Surface Nanosized

摘要

Nanobainite and dispersed carbides were gained on surface layer of a modified carburizing 23Cr2Ni2SilMo bainitic bearing steel based on carbur-ization,tempering at high temperature,and succedent low-temperature isothermal quenching.As compared with the conventional carburizing 20Cr2Ni4 martensitic bearing steel,the novel carburizing 23Cr2Ni2SilMo nanobainitic bearing steel showed a much higher wear-resisting performance and rolling contact fatigue performance.The excellent properties suggest that the novel carburizing 23Cr2Ni2Si1Mo nanostructured bainitic steel is very promising to manufacture heavy-duty bearing,especially for bearings that bear impact load and need high wear-resisting performance and high rolling contact fatigue performance during their service life.