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Portable cold-air dynamic spraying device

A technology of power spraying and cold gas, which is applied in the direction of surface coating liquid device, coating, heating inorganic powder coating, etc., which can solve the problems of waste of resources, waste of raw materials and environment, increase of process cost, etc., and achieve reduction of carrier gas The effects of reducing pressure, reducing preparation costs, and improving utilization efficiency

Inactive Publication Date: 2009-05-06
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment involved requires high process pressure and special gas supply equipment, which makes the equipment huge, which is not conducive to on-site construction and engineering application
Due to the low deposition efficiency of powder, it leads to a large waste of raw materials and environmental pollution
The cold spraying equipment involved in the above-mentioned patents is mostly used for the repair of small components and parts, and the surface is functionalized, which has played a very good role. However, due to structural reasons, it is impossible to quickly prepare metal protective coatings on a large scale, which limits the use of the above-mentioned cold spraying equipment. Applications in the field of corrosion protection
Therefore, the existing cold spraying equipment is relatively large, which is inconvenient for on-site construction and engineering application, which limits the application and development of cold spraying technology in the field of metal corrosion protection
In addition, raw materials have not been strictly screened and designed, and their deposition efficiency is not high, resulting in waste of resources and increased process costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The base material is Q235 steel, the surface is treated by sandblasting and degreasing, and the sandblasting treatment is 15 minutes; the powder is pure aluminum prepared by ion atomization method, sieved through a standard sieve of 300 mesh to 500 mesh, and dried at 120°C for 30 minutes before use ; Spraying process parameters are: carrier gas type, N2; carrier gas inlet pressure, 0.8MPa; carrier gas temperature, 240°C; spraying distance, 25mm, powder temperature, 200°C. The scanning rate is 20mm / s; the number of scanning channels is 4.

[0023] It is found that the deposition rate of aluminum powder is >90%, the porosity of the side metallographic observation is <2%, the oxygen content is <2%, the bonding force between the coating and the substrate is 8.3MPa, and the thickness of the coating deposited by 4 passes is About 1mm.

Embodiment 2

[0025] The base material is Q235 steel, the surface is treated by sandblasting and degreasing, and the sandblasting treatment is 15 minutes; the powder is a mixture of pure aluminum and pure zinc powder prepared by ion atomization method, the content ratio of zinc and aluminum in the powder is 85:15, and it is passed through 300 mesh ~800 mesh standard sieve, dry at 120°C for 30 minutes before use; spraying process parameters are: carrier gas type, N2; carrier gas inlet pressure, 0.8MPa; carrier gas temperature, 240°C; spraying distance, 25mm, powder Temperature, 200°C. The scanning rate is 20mm / s; the number of scanning channels is 2.

[0026] It was found by measurement that the deposition rate of the mixed powder was >85%, the lost powder was mainly zinc powder, the porosity of the obtained side metallographic observation was <2%, the oxygen content was <2%, and the bonding force between the coating and the substrate was 10MPa, the coating thickness deposited by 2 layers i...

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Abstract

The invention relates to a device for carrying out antiseptic treatment to a material surface, in particular to a portable cold-gas-powered spraying device which adopts cold gas power to spray metal antiseptic coating. A plant gas source is connected by an adjusting valve and divided into two paths by a gas controlling and dividing unit in a tee manner; one path of the gas enters a gas heater through a main gas flow and pressure control valve, and the gas enters a gas-powder mixing chamber through a flexible metal pipe after being preheated; and the other path of the gas enters a scraper type powder supplier through the main gas flow and pressure control valve to control the amount of powder supplied in a powder heater, and then enters a nozzle through the flexible metal pipe. The surface coating deposition is realized after the speed-up of the gas and the powder. The device has compact structure and reliable principle and is easy to be carried and used, the deposition efficiency is high, the utilization rate of the gas and the powder is good, and the coating cost is low.

Description

Technical field: [0001] The invention relates to a process equipment for carrying out anti-corrosion treatment on the surface of materials, in particular to a miniaturized portable cold gas power spraying device which uses cold gas power to spray metal anticorrosion coatings. Background technique: [0002] The cold spraying process was originally called cold gas dynamic spraying method (CGSM: Cold gas-dynamic sprayMethod), and its discovery came from an accidental opportunity. In the mid-1980s, the Institute of Theoretical and Applied Mechanics of the Russian Academy of Sciences in Novorossibirsk, Siberia, conducted observations of spacecraft erosion during experiments on supersonic air ducts loaded with particle flow. Prof. A.N. PAPYRIN, who led this work, made a surprising discovery: when the particle velocity exceeds a certain value, the abrasive effect of the particles is transformed into a strong adhesive force. With this realization, A.N. PAPARIN immigrated to the Uni...

Claims

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Application Information

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IPC IPC(8): B05C19/04C23C24/08
Inventor 黄国胜王洪仁李相波
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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