Abstract
To improve the insufficient lubrication of slewing bearing, this study investigates the tribological properties of 42CrMo bionic textured composite surface (BTCS) with different densities under MXenes-Ti3C2 lithium composite grease (MLCG). Inspired by the micro-texture characteristics of the clamshell, BTCS is composed of 42CrMo and Sn-Ag-Cu (SAC) alloy. The results indicate that the tribological performance of BTCS (ρ = 38%) is improved most significantly, the average friction coefficient (0.056) and wear rate (6.4 ×10−8 mm3N−1m−1) of the counterpart ball reach the minimum, and the worn surface is fine and smooth. This is mainly attributed to the synergistic self-repairing effect of MXenes-Ti3C2 and SAC on the worn surface. Furthermore, SAC particles act as submicron rolling bearings, transforming the friction form into rolling-sliding.
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