Preparation technology for self-lubricating coating with wide temperature range of room temperature to 800 DEG C

The invention discloses a preparation technology for a self-lubricating coating with a wide temperature range of room temperature to 800 DEG C. An arc ion plating method is employed for preparing a chrome oxide coating, and the prepared chrome oxide coating has relatively small friction coefficient (0.15-0.4) and relatively low wear rate at the wide temperature range of room temperature to 800 DEG C, especially at 800 DEG C, the friction coefficient is about 0.15 and the wear rate is about 10-7 mm /Nm. Because of the good mechanical properties and tribology performances, the chrome oxide coating is applied to sealing of foil sheets of aero-engines, gas bearings and other friction moving parts working at the wide temperature range of room temperature to 800 DEG C.