The microstructures and tribological properties of CoCrFeMoNi high entropy alloy (HEA) before and after sulfurization were compared and discussed in the present study. The results showed that the CoCrFeMoNi HEA was mainly composed of FCC solid solution. After being sulfurized at 260℃ for 2 h, the FeS/MoS₂ multisulfides solid lubricant films with a thickness of approximately 5.0 μm were successfully fabricated and well combined with the HEA. The stable friction coefficients and weight losses of the sulfurized HEA (0.15 and 4.25 mg) were decreased obviously than the original HEA (0.47 and 15.1 mg). At the beginning of the friction, the friction coefficient of the sulfurized HEA was easier to reach into stable stage. Because of the synergistic work of FeS and MoS₂ lubricant phases, the sulfides boundary lubricant films were formed in the later stage of friction under the wearing condition, which could help the friction system work for longer time under lower friction coefficient.

比较和讨论了硫化前后CoCrFeMoNi高熵合金（HEA）的显微组织和摩擦学性能。结果表明，CoCrFeMoNi HEA主要由FCC固溶体组成。在260℃硫化2 h后，成功制备了厚度约为5.0μm的FeS / MoS _2多硫化物固体润滑膜，并与HEA很好地结合。硫化HEA（0.15和4.25 mg）的稳定摩擦系数和失重明显低于原始HEA（0.47和15.1 mg）。在摩擦开始时，硫化HEA的摩擦系数更容易达到稳定阶段。由于FeS和MoS ₂的协同作用 在磨损阶段，在磨损的后期形成硫化物边界润滑膜，这有助于在较低的摩擦系数下使摩擦系统长时间工作。