Processing technology for lubricating wear-resistant coating of bearing bush of engine

Abstract

The invention discloses a processing technology for a lubricating wear-resistant coating of a bearing bush of an engine. The processing technology comprises the steps of (1) pretreatment, wherein thesurface of the bearing bush is cleaned, after sand blasting treatment, the bearing bush is placed in a passivation pond for passivation treatment, and after passivation, the bearing bush is cleaned and dried; (2) pre-heating treatment, wherein after pretreatment, the bearing bush is placed in a drying oven and hated to 40-60 DEG C, and the temperature is preserved for 10-30 min; (3) spraying treatment, wherein the bearing bush is taken from the drying oven, and thermal spraying is conducted on the surface of the bearing bush by adopting the wear-resistant lubricating coating; (4) solidifying treatment, wherein the bearing bush is placed in the drying oven and heated to 120-160 DEG C for solidifying, and the solidifying time is 20-30 min; (5) packaging checking. According to the processingtechnology, a spraying mode is adopted for replacing a bearing bush electroplating mode, the environmentally friendly problem is solved, and the production cost is reduced; the processed lubricating wear-resistant coating of the bearing bush of the engine greatly improves the running reliability of the bearing bush of the engine, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of engine bearing coatings, in particular to a processing technology for lubricating and wear-resistant coatings of engine bearings. Background technique [0002] The engine bearing bush is the part where the sliding bearing and the journal are in contact. It is shaped as a tile-like semi-cylindrical surface and is very smooth. It is generally made of bronze, alloy and steel-backed composite copper or aluminum. The bearing bush and the journal adopt a clearance fit or intermittent contact, and generally do not rotate with the shaft. The traditional bearing pad is coated with a layer of protective layer on the inner surface of the bearing pad by electroplating process, which plays the role of lubrication, wear resistance, anti-corrosion and aesthetics. For example, in order to meet the operating conditions of the engine bearing pad, a layer of lubricious Lubricating and wear-resistant coatings with wear resi...

AI Technical Summary

Problems solved by technology

[0005] With the development of society and the higher and higher requirements for engine power and speed, the performance requirements for engine bearings, bushings and other wear-resistant parts are getting higher and higher, and the requirements for the service life of engine bearings are also greatly improved. The above-mentioned existing patents CN103710116A, CN104120001A and CN103216530A disclosed bearing coating can no longer meet the requirements of wear resistance and service life

For example, the patent CN103710116A uses oil film lubrication, which is a supplement to the original lubrication defects. The main component of the lubrication is lubricating oil, which cannot achieve self-lubrication; the patent CN104120001A uses a lubricant containing molybdenum disulfide to greatly improve the lubrication properties, but Its wear resistance is poor. Although lubrication and wear resistance are two concepts, they always exist together. The quality of lubrication affects the effect of wear resistance, but it cannot determine the result of wear resistance. Therefore, it needs to be added to its formula design. Appropriate wear-resistant materials to truly achieve the ideal effect of both lubrication and wear resistance

And although the patent CN103216530A lists all the components that may be used, and occasionally also states the proportions, it is not easy to realize in the actual formula design, and the antifriction coating disclosed by it has gradually been unable to meet the requirements of engine bearing bushes and bushings. Use requirements for lubricity and wear resistance of wear-resistant parts

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