Post-processing method for improving anti-wear and friction-reducing properties of CrN coating

A post-processing method for CrN coating, which comprises:

• performing a thermal cycle treatment on the CrN coating in a temperature range of −20° C. to 60° C. under a humidity environment of 60% to 80% R.H,
• wherein, in the thermal cycle treatment, a single thermal cycle comprises a heating process from −20° C. to 60° C. and a cooling process from 60° C. to −20° C., a single thermal cycle time is 2 h, every 6 single thermal cycles is one period, a constant temperature is maintained between every two periods for 12 h, and the constant temperature has a fluctuation of ±0.5° C.,
• in the heating process, a heating rate is 2° C/min and a temperature deviation is less than or equal to ±2° C;
• and
• in the cooling process, a cooling rate is 1° C/min and a temperature deviation is less than or equal to ±2° C.