Preparation method for molybdenum disulfide coating of brake pad for high-speed train

Abstract

The invention discloses a preparation method for a molybdenum disulfide coating of a brake pad for a high-speed train. The preparation method comprises the steps of deoiling and cleaning for a product to be sprayed, drying, spraying for a molybdenum disulfide self-lubricating coating, room-temperature dry curing, high-temperature curing and the like; and the molybdenum disulfide coating prepared by the preparation method is compact and uniform, good in bonding with a matrix, capable of meeting the actual use requirements of the product, good in anti-friction and anti-oxidation performances, and also capable of keeping long-time lubrication even if under high-pressure, intermittent-operation and dusty or high-temperature environments. The preparation method is simple in process, simple and convenient to operate, short in production period, high in controllability, and suitable for preparation for coatings with complex deposition shapes and large areas; and moreover, production equipment is extremely low in investment, and remarkable in economic benefits.

Description

technical field [0001] The invention relates to the technical field of rail transit equipment manufacturing, in particular to a method for preparing a molybdenum disulfide coating for brake pads used in high-speed trains. Background technique [0002] Some components in the braking system of high-speed trains have been subjected to slow-speed high-pressure, mechanical friction or smooth, rocking motion or intermittent work for a long time. Since the components are in an open environment, they are subjected to rain, snow, wind, sand, and high and low temperature environments, and most of the components are steel. The worn part will accelerate wear and oxidation, reducing service life and reliability. At present, wear-resistant steel parts are pre-plated with copper to prevent surface oxidation, but the wear resistance of the parts has not been improved. Therefore, after copper plating, parts need to be To prepare dry wear-resistant self-lubricating coatings for long-term main...

AI Technical Summary

Problems solved by technology

[0005] 1. Vacuum plasma sputtering technology has very strict requirements on the quality of sputtering targets. Generally, a new target needs to be replaced before producing high-quality coatings, which costs a lot;

[0006] 2. For substrates with special shapes, corresponding sputtering targets need to be configured, and the complex vacuum equipment and processes used to deposit coatings with complex shapes are quite expensive;

[0007] 3. The ideal preservation method for the coating prepared by the sputtering method is vulcanization treatment, but this will cause many small holes on the surface of the coating, which is susceptible to chemical erosion, resulting in a decrease in the performance of the coating;

[0008] 4. Not suitable for complex deposition shapes, large-area coating preparation, etc.

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