Method for optimizing high-temperature friction performance of high-entropy alloy

The invention relates to the technical field of performance optimization of high-entropy alloys, and particularly discloses a method for optimizing high-temperature friction performance of a high-entropy alloy, which comprises the following steps: determining the mass of Co, Ni, Al and Nb elements according to the molar ratio of the Co 39.2, Ni 39.2, Al 15.6 Nb6 high-entropy alloy added with the Nb element, and weighing the Co, Ni, Al and Nb elements; metal raw materials prepared according to the component ratio are smelted and then cooled along with a furnace; putting a cast ingot obtained by smelting into a quartz tube, vacuumizing and sealing the tube; placing the quartz tube sealed with the cast ingot in a muffle furnace, heating to 1150 DEG C along with the furnace at a heating rate of 10 DEG C/min, keeping the temperature for 2 hours, taking out and quenching; and placing the quenched quartz tube sealed with the cast ingot in the muffle furnace again, heating to 650 DEG C along with the furnace, preserv