The invention provides a self-texturing HVOF / PVD
composite coating as well as a preparation method and application thereof, and relates to the technical field of surface coatings. The self-texturing HVOF / PVD
composite coating comprises a
metal matrix, a NiCr-Cr3C2
metal ceramic supporting layer, a Cr bonding layer, a Cr / CrxCy gradient
transition layer and a DLC thin film layer. The surface of the NiCr-Cr3C2
metal ceramic supporting layer is provided with a self-texture morphology formed through
corrosion. The self-texture micro-pit structure is formed on the surface of the NiCr-Cr3C2 metal
ceramic supporting layer, the self-texture micro-pits serve as an
oil storage pool and a
scrap storage pool, lubricating
oil can be effectively stored in an oil lubricating environment,
abrasive dust can be captured, secondary
scratching caused by accumulation of the
abrasive dust in a friction contact area is avoided, the
friction coefficient of the
composite coating is remarkably reduced, and the service life of the composite
coating is prolonged. The antifriction and antiwear properties of the
coating are improved, the service life of the
coating is prolonged, and good application prospects are achieved.