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Preparation method of light metal surface compound coating

A technology of light metals and compounds, applied in heating inorganic powder coating and other directions, to achieve the effect of reducing forming temperature, improving surface properties, and high processing flexibility

Active Publication Date: 2014-04-09
苏州仁和商用设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the existing methods, and to provide a method for preparing a compound coating on the surface of light metals, by means of laser melting and medium-temperature laser peening to accelerate the diffusion reaction between the preset powder and the metal matrix, and to promote the surface compound coating. The formation of the coating, and refine the surface compound coating to form a layer of high-performance surface compound coating with uniform composition, dense and fine structure, and large thickness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Grind and polish the metal aluminum surface, and then perform ultrasonic cleaning in alcohol;

[0024] 2) The surface of metal aluminum is subjected to laser melting treatment, the laser power is 1KW, the scanning speed is 5mm / s, the spot diameter is 2mm, and the overlap rate is 20%, so as to refine the surface grains;

[0025] 3) Pre-place 10nm metal nickel powder on the surface of metal aluminum after laser melting treatment;

[0026] 4) Use 40μm aluminum foil as the absorbing layer and plastic coating layer, and cover the metal aluminum pre-prepared with nickel powder as a whole. While serving as the laser absorbing layer, the aluminum foil plays the role of restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;

[0027] 5) Fix the metal aluminum coated with pre-coated nickel powder on the heating workbench, use high temperature resistant glass as the constraining layer, heat it to 400°C and use a nanosecond pulse laser ...

Embodiment 2

[0030] 1) Grinding and polishing the surface of the AZ31 magnesium alloy, and then ultrasonic cleaning in alcohol;

[0031] 2) The magnesium alloy surface is subjected to laser melting treatment, the laser power is 2KW, the scanning speed is 15mm / s, the spot diameter is 3mm, and the overlap rate is 30%, so as to refine the surface grains;

[0032] 3) Pre-place 10 μm metal aluminum powder on the surface of aluminum alloy after laser melting treatment;

[0033] 4) Use 20μm aluminum foil as the absorbing layer and the plastic coating layer, and wrap the magnesium alloy pre-prepared with aluminum powder as a whole. While serving as the laser absorbing layer, the aluminum foil plays a role in restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;

[0034] 5) Fix the pre-coated magnesium alloy with aluminum powder on the heating workbench, use high-temperature resistant glass as the constrained layer, heat it to 500°C and perform laser pee...

Embodiment 3

[0037] 1) Grind and polish the surface of the ZL101 aluminum alloy, and then perform ultrasonic cleaning in alcohol;

[0038]2) The aluminum alloy surface is subjected to laser melting treatment, the laser power is 5KW, the scanning speed is 50mm / s, the spot diameter is 5mm, and the overlapping rate is 50%, so as to refine the surface grains;

[0039] 3) Pre-place 100 μm metal zinc powder on the surface of aluminum alloy after laser melting treatment;

[0040] 4) Use 30μm aluminum foil as the absorbing layer and plastic coating layer, and wrap the aluminum alloy with zinc powder pre-prepared as a whole. While serving as the laser absorbing layer, the aluminum foil plays a role in restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;

[0041] 5) Fix the coated aluminum alloy with pre-coated zinc powder on the heating workbench, use high-temperature resistant glass as the constrained layer, heat it to 600°C and perform laser peening w...

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Abstract

The invention discloses a preparation method of a light metal surface compound coating, and relates to the technical field of a material surface. The method is characterized by comprising the following steps: firstly, processing a light metal surface by using a laser fused method, and then putting the alloying metal powder on the laser-fused light metal surface; finally processing the light metal surface with preset powder in a laser peening manner under the condition of medium temperature; accelerating diffusion reaction of the preset powder and metal matrix, so as to prepare the surface compound coating. By adopting the preparation method of the light metal surface compound coating, the formation temperature of the compound coating is reduced, the thickness of the surface compound coating is increased, a microstructure of the surface compound coating is refined, and the light metal surface performance is significantly improved. The preparation method is simple in craft process, easy to operate, and applicable to large-scale mass production.

Description

technical field [0001] The invention relates to the technical field of material surfaces, in particular to a method for preparing a compound coating on a light metal surface. Background technique [0002] Light metals and their alloys have been widely used or have shown broad application prospects because of their excellent properties. However, they still have some shortcomings of their own, such as poor wear resistance of aluminum and aluminum alloys, poor corrosion resistance of magnesium and magnesium alloys, etc., which seriously limit their applications. Surface modification can overcome the disadvantages of poor wear resistance and corrosion resistance while maintaining the overall performance of the material, which has attracted the attention of many researchers at home and abroad. [0003] Compound coatings usually have excellent properties such as wear resistance, corrosion resistance, and high temperature oxidation resistance, so the preparation of compound coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08C23F17/00C22F3/00
Inventor 崔承云崔熙贵周建忠许晓静张朝阳
Owner 苏州仁和商用设备有限公司
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