Self-lubricating composite coating, preparation method, joint bearing using the coating and preparation method of joint bearing

Abstract

The invention discloses a self-lubricating composite paint and a preparation method. The self-lubricating composite paint comprises the following raw materials: phosphoric acid, aluminium hydroxide, zinc oxide, a surfactant, molybdenum disulfide and graphite. The preparation method comprises: 1) adding phosphoric acid, aluminium hydroxide and zinc oxide into water, stirring and heating, and then adding the surfactant to prepare an inorganic binder; 2) performing crushing and sieving on molybdenum disulfide and graphite, and grinding to obtain a mixed powder; and 3) adding the mixed powder into the inorganic binder, stirring and diluting to obtain the self-lubricating composite paint. The invention also discloses a knuckle bearing employing the self-lubricating composite paint and a preparation method of the knuckle bearing. A solid lubricating coating formed by the self-lubricating composite paint provided by the invention has good wear resistance, corrosion resistance, self-lubrication property and high-temperature resistance; and the self-lubricating composite paint has relatively low friction coefficient, wear extent and friction temperature, is capable of substantially improving the tribological property of the knuckle bearing.

Description

technical field [0001] The invention belongs to the technical field of solid lubricants, and in particular relates to a self-lubricating composite coating, a preparation method, a joint bearing using the coating and a preparation method of the joint bearing. Background technique [0002] Solid lubrication uses solid lubricating substances (such as solid powder, film and composite materials, etc.) to reduce the friction and wear of two surfaces in relative motion, and protect the surface from damage. Solid lubricant materials include inorganic compounds such as graphite, molybdenum disulfide, boron nitride, etc., organic compounds such as wax, polytetrafluoroethylene, phenolic resin, etc., and metals such as Pb, Sn, Zn, etc. Solid lubricants have a wide range of applications, from white-hot high temperatures above 1000°C to cryogenic low temperatures of liquid hydrogen. They can effectively lubricate chemical machinery working in severely corrosive gas environments or aerospa...

AI Technical Summary

Problems solved by technology

However, the preparation process of existing solid lubricating coatings is complicated, and the cost is high, and most of them exist in the form of organic bonded solid lubricating coatings

In the prior art, the patent CN100572599C discloses a method for preparing a molybdenum disulfide-based lubricating coating. Although the coating has a certain effect of reducing friction and wear, the curing process of this method is relatively simple, which directly affects the coating. Excellent film-forming effect and service life, and the organic adhesive is insoluble in water, and the dispersion of the solid lubricant in the polymer resin matrix is ​​poor, which directly leads to the film-forming effect of the coating, heavy pollution, poor high temperature resistance and corrosion resistance, Not suitable for mass production