A liquid material supply system for suspension cold spraying process

Abstract

The invention provides a liquid material supply system for a suspension cold spraying process, comprising: a compressed gas unit, at least two suspension containers, an oscillating device arranged under any one of the suspension containers, an atomizing nozzle and Spraying spray gun, the compressed gas unit includes at least three gas outlets, the first gas outlet of the compressed gas unit is connected to the gas inlet of the atomizing nozzle through a gas pipeline, and the remaining gas output of the compressed gas unit is Ports are connected to the liquid inlet of any one of the suspension containers respectively; the liquid outlet of any one of the suspension containers is connected with the liquid inlet of the atomizing nozzle through a liquid pipeline; the atomized steam outlet of the atomizing nozzle passes through The pipeline is connected to the spray gun, and the liquid material supply system for the suspension cold spraying process provided by the present invention adopts a pressure-based liquid material delivery method to solve the problem that the ultrafine powder cannot be transported, so that the ultrafine powder can be used for cold spraying. The technology has been better applied, and the performance of ultra-thin coatings prepared by cold spray technology has been improved.

Description

technical field [0001] The invention relates to the technical field of cold spraying, in particular to a liquid material supply system for a suspension cold spraying process of the cold spraying process. Background technique [0002] Cold spraying technology uses high-pressure gas as the acceleration medium to drive powder particles to hit the substrate at a very high speed and combine with it, thereby forming a coating on the basic surface. Because cold spraying has the characteristics of low temperature and high speed, the coating prepared by it has the characteristics of no oxidation, no phase change, and low porosity. It is suitable for temperature sensitive (amorphous, nanocrystalline, etc.), phase change sensitive (cermet, etc.), Preparation of oxygen and nitrogen sensitive (Cu, Ti, etc.) material coatings. [0003] When cold spraying is used for coating preparation, the particle size of the powder used is generally 5-50 μm, and the thickness of the prepared coating i...

AI Technical Summary

Problems solved by technology

[0004] The existing suspension spraying is mainly used in plasma spraying and supersonic flame spraying. However, due to insufficient feeding pressure and large differences in feeding methods in the liquid material supply system used in the suspension cold spraying process, it cannot meet the requirements of the suspension. Feed requirements for cold spray

And due to the difference in density of the suspensions prepared by different powders, the current suspension spraying can only realize the coating preparation of a single material, and it is impossible to use the suspension spraying to prepare composite coatings or multi-gradient coatings.

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