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A method for preparing a high-hardness coating on the surface of an aluminum alloy

An aluminum alloy surface, high hardness technology, applied in the direction of metal material coating process, coating, etc., can solve problems such as cracking, bonding interface cracks, etc., achieve good wear resistance, improve surface strength, improve wear resistance and resistance erosive effect

Active Publication Date: 2017-01-18
四会市澳利铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of ceramic powder to improve the wear resistance of aluminum alloys cannot essentially solve the problem of cracks and cracks at the bonding interface caused by high melting point ceramic layers.

Method used

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  • A method for preparing a high-hardness coating on the surface of an aluminum alloy
  • A method for preparing a high-hardness coating on the surface of an aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: see figure 1 , figure 2 , Use electronic balance FA2004N to weigh Cr, Ti, Si, Ni and Al powder, the molar ratio is: 24% Cr, 27.5% Ti, 22% Si, 26% Ni, 0.5% Al, and will The weighed powder is thoroughly mixed in a ball mill, and the mixing time is 2-5 hours. Then configure 4% polyvinyl alcohol as an adhesive, and heat it in a water bath for about 10 minutes to completely melt it. Polish the aluminum plate with metallographic sandpaper to remove the oxide film on the surface and clean it with acetone. The mixed powder is mixed with a prepared adhesive into a viscous shape, and pre-coated on the cleaned aluminum plate with a coating thickness of 0.5 mm and dried for about 3 hours. The UW-600A YAG laser is used to irradiate the prefabricated coating on the aluminum alloy and protected by high-purity argon. The defocus of the laser focal spot is 3mm, the pulse width is 6ms, the laser peak power is 8kw, the frequency is 8HZ, and the scanning speed is 5mm / s. Cut ...

Embodiment 2

[0033] Example 2: Weigh Cr, Ti, Si, Ni and Al powder with electronic balance FA2004N, the molar ratio is: 21% Cr, 26% Ti, 24% Si, 28% Ni, 1% Al, And put the weighed powder in a ball mill to mix well, and the mixing time is 2-5 hours. Then configure 4% polyvinyl alcohol as an adhesive, and heat it in a water bath for about 10 minutes to completely melt it. Polish the aluminum plate with metallographic sandpaper to remove the oxide film on the surface and clean it with acetone. The mixed powder is mixed with a prepared adhesive into a viscous shape, and pre-coated on the cleaned aluminum plate with a coating thickness of 0.5 mm and dried for about 3 hours. The UW-600A YAG laser is used to irradiate the prefabricated coating on the aluminum alloy and protected by high-purity argon. The defocus of the laser focal spot is 3mm, the pulse width is 6ms, the peak laser power is 8kw, the frequency is 8HZ, the scanning speed is 5mm / s, and the average hardness of the coating is HV932; it...

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Abstract

The invention discloses a method for preparing a high-hardness coating on an aluminum alloy surface, which comprises the following steps: 1) respectively weighing Cr, Ti, Si, Ni and Al powders; 2) mixing the powders weighed in the step 1); 3) preparing a 4% polyvinyl alcohol solution; 4) sanding an aluminum alloy plate surface, and cleaning; 5) blending the powder mixture in the step 2) with the solution prepared in the step 3) to a viscous state, and precoating the viscous powder mixture on the aluminum alloy plate treated by the step 4); and 6) irradiating the preformed coating on the aluminum alloy plate. The method can manufacture a coating, which has the advantages of high hardness, favorable wear resistance, favorable oxidation resistance and high metallurgical bonding force, on the aluminum alloy surface.

Description

Technical field [0001] The invention relates to the technical field of material surface treatment and strengthening, in particular to a method for preparing a high-hardness coating on the surface of an aluminum alloy; by this method, an alloy with high hardness, high wear resistance and high corrosion resistance is formed on the surface of the aluminum alloy 化层。 The layer. Background technique [0002] Aluminum and aluminum alloys are one of the most widely used materials in non-ferrous metals. Aluminum alloys have many excellent properties such as low density, easy processing, low thermal expansion coefficient, high thermal conductivity, high specific stiffness and high specific strength. It has been widely used in daily production and life, aviation, automobiles, high-speed rail, engine pistons, optical instruments, missile inlay structures and other fields. However, with the further development of industrial production, higher requirements are put forward for the surface prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 黄灿李文博赵凤翔张悦罗肖肖邓家飞
Owner 四会市澳利铝业有限公司