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Aluminum alloy surface modification method

A technology of aluminum alloy surface and aluminum alloy plate, applied in the field of material surface treatment and strengthening, can solve the problems of cracking, combined interface cracks, etc., to achieve good wear resistance, improve surface strength, improve wear resistance and corrosion resistance. Effect

Inactive Publication Date: 2015-02-04
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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Examples

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Effect test

Embodiment 1

[0037] Example 1, see figure 1 , figure 2 , Weigh Cr, Ti, Si, V and Al powders with electronic balance FA2004N, the molar ratio of each powder is: 23% Cr, 28% Ti, 21% Si, 27% V, 1% Al, And put the weighed powder in the ball mill and mix well, the mixing time is 4 hours. Then configure 4% polyvinyl alcohol as an adhesive, and heat it in a water bath for about 10 minutes to completely dissolve it. Polish the aluminum alloy plate with metallographic sandpaper to remove the oxide film on the surface, and clean it with acetone. Blend the mixed powder into a viscous shape with the prepared adhesive, and pre-coat it on the cleaned aluminum alloy plate with a coating thickness of 0.5mm, and dry it for about 3 hours. The UW-600A YAG laser is used to irradiate the prefabricated coating on the aluminum alloy, and the high-purity argon gas is used for protection. 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...

Embodiment 2

[0039] Embodiment 2, weigh Cr, Ti, Si, V and Al powder with electronic balance FA2004N, molar ratio is: 21% Cr, 25% Ti, 23% Si, 28% V, 3% Al, And put the weighed powder into the ball mill and mix well, the mixing time is 5 hours. Then configure 4% polyvinyl alcohol as an adhesive, and heat it in a water bath for about 10 minutes to completely dissolve it. Polish the aluminum alloy plate with metallographic sandpaper to remove the oxide film on the surface, and clean it with acetone. Blend the mixed powder into a viscous shape with the prepared adhesive, and pre-coat it on the cleaned aluminum alloy plate with a coating thickness of 0.5mm, and dry it for about 3 hours. The UW-600A YAG laser is used to irradiate the prefabricated coating on the aluminum alloy, and the high-purity argon gas is used for protection. 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. Combined with...

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Abstract

The invention discloses an aluminum alloy surface modification method which comprises the following steps: (1) respectively weighing Cr, Ti, Si, V and Al powder; (2) mixing the powder weighed in the step (1); (3) preparing a polyvinyl alcohol solution of which the concentration is 4%; (4) grinding the surface of an aluminum alloy plate and washing; (5) blending the powder mixed in the step (2) into paste by using the solution prepared in the step (3), and pre-coating the paste on the aluminum alloy plate treated in the step (4); and (6) radiating the preformed coating on the aluminum alloy plate. The method disclosed by the invention can be used for preparing a coating which is high in hardness, good in wear resistance and oxidation resistance and high in metallurgical binding force on an 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 modifying the surface of an aluminum alloy; through the method, an alloyed layer with high hardness, high wear resistance and high corrosion resistance is formed on the surface of the aluminum alloy. [0002] Background technique [0003] 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 specific strength. It has been widely used in daily production and life, as well as aviation, automobiles, high-speed rail, engine pistons, optical instruments, missile mosaic structures and other fields. However, with the further development of industrial production, higher requirements are put forward for the surface properties o...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 黄灿喻文新邓家飞罗肖肖何展航刘焱
Owner CHONGQING UNIV OF TECH
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