Effects of surface nanocrystallization on tribological properties of 316L stainless steel under MoDTC/ZDDP lubrications

摘要

In this paper, 316L stainless steel (316LSS) is treated by a ultrasonic cold forging technology (UCFT) which is one of the methods of surface nanocrystallization. The tribological properties of UCFT sample are investigated by a SRV tribometer under lubrications with MoDTC and ZDDP. The chemical analysis of tribofilms is performed using X-ray photoelectron spectroscopy (XPS). The results show that the UCFT sample exhibits the lowest coefficient of friction (0.066) under MoDTC lubrication and the lowest wear rate under ZDDP lubrication, indicating that surface nanocrystallization has synergistic effects on low friction and antiwear performances of both MoDTC and ZDDP. The obviously synergistic effects between UCFT steel and MoDTC/ZDDP may be attributed to the higher hardness and surface reactivity of the UCFT surface.