Surface micro-pit self-lubricating coating and preparation method thereof

Abstract

The invention discloses a surface micro-pit self-lubricating coating and a preparation method thereof. The self-lubricating coating comprises that a nickel-based coating is arranged on a base material surface in a laser cladding mode; a micro-pit texture is machined on the surface of the nickel-based coating through electric spark machining; and a solid lubricant and resin are mixed and then are filled into the micro-pit texture. According to the surface micro-pit self-lubricating coating and the preparation method thereof, three antifriction wear-resistant methods, namely the high hardness performance of the nickel-based coating, the antifriction performance of the surface micro-pit texture and the lubricating performance of the lubricant, are combined, so that the obtained coating has better acting time efficiency, the service life is also prolonged, and the coating has excellent lubricating performance, wear resistance, self-repairability and stability; and according to the structure, the surface friction resisting and antifriction performance is improved, meanwhile, surface self-lubrication is achieved, and the use requirements of parts under harsh working conditions are met.

Description

technical field

[0001] The invention belongs to the field of surface engineering, and in particular relates to a micropit self-lubricating coating on the surface and a preparation method thereof. Background technique

[0002] During the service process of mechanical parts, the friction and wear behavior between the contacting surface interfaces directly affects the service life, working efficiency, bearing capacity and safety factor of the entire equipment. Therefore, how to improve its surface wear resistance has always been the focus of research. The study found that the use of surface modification technology can further enhance its anti-wear and anti-friction performance on the basis of maintaining the original advantages of the substrate. As an advanced surface modification technology, laser cladding utilizes the characteristics of extremely high focusing energy of high-energy laser beams to instantly completely melt the powder preset on the surface of the substrate or ...

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