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Method of hole sealing and modification on cold spraying coating on surface of light metal

A cold spraying, light metal technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of insufficient bonding strength, many holes, etc., achieve outstanding engineering value, increase the density of the coating, improve The effect of bond strength

Active Publication Date: 2018-11-13
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of many holes and insufficient bonding strength in the cold spray protective coating on the light metal surface in the prior art, and to provide a surface protection technology for sealing and modifying the cold spray coating on the light metal surface

Method used

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  • Method of hole sealing and modification on cold spraying coating on surface of light metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pore ​​sealing modification of cold sprayed pure titanium coating on the surface of 2024 aluminum alloy

[0025] (1) Sample pretreatment. The surface of the 2024 aluminum alloy surface was cold sprayed with pure titanium coating and cleaned with alcohol and dried.

[0026] (2) Put it into the double-glow diafiltration furnace. Place the pure titanium infiltration source and the 2024 aluminum alloy surface cold sprayed pure titanium coating workpiece, and adjust the pole spacing to 40mm.

[0027] (3) vacuuming. Close the air inlet, turn on the vacuum pump, and pump the air pressure in the furnace to 10 -1 Below Pa, then pass argon to the working pressure of 40Pa.

[0028] (4) Plasma cleaning the sample. Turn on the cooling water, start the power supply, first turn on the power supply of the 2024 aluminum alloy surface cold spray pure titanium coating workpiece, apply 500V voltage, and use the plasma beam generated by glow discharge to cold spray the pure titanium co...

Embodiment 2

[0034] Pore ​​sealing modification of cold sprayed pure copper coating on the surface of 2024 aluminum alloy

[0035] (1) Sample pretreatment. Clean the surface of the sample with alcohol and dry it, if necessary, polish it first and then clean it.

[0036] (2) Put it into the double-glow diafiltration furnace. Place the infiltration source of pure copper target material, cold spray pure copper coating workpiece on the surface of 2024 aluminum alloy, and adjust the pole spacing to 30mm.

[0037] (3) vacuuming. Close the air inlet, turn on the vacuum pump, and pump the air pressure in the furnace to 10 -1 Below Pa, then pass argon to the working pressure of 30Pa.

[0038] (4) Plasma cleaning the sample. Turn on the cooling water, start the power supply, first turn on the power supply of the 2024 aluminum alloy surface cold spray pure copper coating workpiece, apply 400V voltage, and use the plasma beam generated by glow discharge to cold spray the pure copper coating workp...

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Abstract

The invention relates to the technical field of light metal surface protection, in particular to a technological method of carrying out hole sealing and modification on a protective coating on the surface of light metal and discloses a plasma deposition thermal treatment technological method for carrying out hole sealing and diffusion on cold spraying coating on the surface of light metal based onthe double-deck glow plasma seepage plating technology. A light metal workpiece subjected to treatment of cold spraying coating is put in a double-deck glow furnace, a double hollow cathode glow discharging effect is utilized to heat the workpiece and a target, the target and the coating are made of the same texture, and the target is placed on a source electrode rack, is heated to form evaporation and sputtering so as to have deposition on the surface of the workpiece under the bombardment of the plasma generated through glow discharge; as the workpiece is heated and diffuses, hole sealing and diffusion treatment are carried out on cold spraying of the workpiece to eliminate holes in the surface and interior of the coating; and a diffusion layer is formed between the coating and the matrix workpiece to improve the defect that the bonding strength of the cold spraying coating and the matrix workpiece is not high.

Description

technical field [0001] The invention relates to the technical field of surface protection of shells and parts of aircraft, ships and automobiles, and in particular to a technical method for sealing and modifying light metal surface protective coatings. Background technique [0002] Cold spraying is a coating preparation technology in which compressed air accelerates metal particles to a critical speed (supersonic speed), and the metal particles directly hit the surface of the substrate and undergo physical deformation and accumulation to form a coating. The metal particles are flattened on the surface of the substrate and firmly attached, and the metal particles are not melted during the whole process. There is basically no working condition requirement for cold spraying, and the noise is less than 60 decibels. Cold spraying has no high temperature, no flame, no dangerous gas, no radiation and chemical waste. It can be operated by hand, with high safety, good orientation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/04C23C10/08
CPCC23C10/08C23C24/04
Inventor 徐一师鹏飞徐伟陈嘉源刘万辉周雪峰袁婷张黎伟
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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