Li Xiaoxue, Xu Jingli
School of Mechanical and Electronic Engineering, Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China
School of Mechanical and Traffic Engineering, Ordos Institute of Technology 1 Ordos Avenue East Ordos 017000 China.
RSC Adv. 2018 Apr 17;8(25):14129-14137. doi: 10.1039/c7ra12756a. eCollection 2018 Apr 11.
In order to increase the service life and operational reliability of a 20CrMnTi-steel-based gearing system, the friction and wear behavior of 20CrMnTi needs to be further improved. In this study, the sliding friction and wear properties of 20CrMnTi, 20CrMnTi-1.50 wt% graphene (20-Gr), 20CrMnTi-15.00 wt% SnAgCu (20-Sn), and 20CrMnTi-15.00 wt% SnAgCu-1.50 wt% graphene (20-Gr-Sn) were examined on a ball-on-disk tribometer. The friction and wear properties at 0-85 min of 20-Gr-Sn were significantly better compared to those of 20CrMnTi, 20-Gr, and 20-Sn. Metallic oxides appeared on the smooth wear scar of 20-Gr-Sn, which were tightly combined with the 20CrMnTi-based material. This caused a lubrication film with low hardness (approximately 1.25 GPa) to form on the grain-refined layer with high hardness (approximately 5.92 GPa). Graphene and SnAgCu in the lubrication film exhibited excellent coordinating lubrication to result in a low friction coefficient and lower wear rate. The obtained results can provide a good reference for increasing the service life of 20CrMnTi-steel-based gear systems.
为了提高基于20CrMnTi钢的齿轮系统的使用寿命和运行可靠性，20CrMnTi的摩擦磨损行为需要进一步改善。在本研究中，在销盘摩擦磨损试验机上考察了20CrMnTi、20CrMnTi-1.50 wt%石墨烯（20-Gr）、20CrMnTi-15.00 wt% SnAgCu（20-Sn）和20CrMnTi-15.00 wt% SnAgCu-1.50 wt%石墨烯（20-Gr-Sn）的滑动摩擦磨损性能。与20CrMnTi、20-Gr和20-Sn相比，20-Gr-Sn在0-85分钟时的摩擦磨损性能显著更好。20-Gr-Sn光滑磨损表面出现金属氧化物，其与20CrMnTi基材料紧密结合。这使得在高硬度（约5.92 GPa）的细化晶粒层上形成了低硬度（约1.25 GPa）的润滑膜。润滑膜中的石墨烯和SnAgCu表现出优异的协同润滑作用，从而导致低摩擦系数和较低的磨损率。所得结果可为提高基于20CrMnTi钢的齿轮系统的使用寿命提供良好参考。
