| 초록 |
Recently, because of safety and environmental concerns, there has been a tendency to introduce solid self-lubricating composite for bearing materials. In this paper, Fe-Cr-C-Mn-Cu cast composite alloys was been chosen as a self-lubricating composite and investigated with respect to the role of Cu-rich 2nd phase particles which smeared on the wear surface during sliding. The wear resistance of the material is improved with increasing copper concentration up to 15 wt. %. It is thought that the improved wear resistance was obtained by forming protective tribo-film preventing metal-to-metal contact through the smearing of the embedded Cu-rich 2nd phase particles. This self-formation of protective oxide films is likely to improve the wear resistance of austenitic Fe-Cr-C-Mn-Cu cast composite alloys. |
