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Wear-resistant aluminum alloy and preparation method thereof

A technology of aluminum alloy and aluminum powder, applied in metal material coating process, coating and other directions, can solve the problems of high friction coefficient and wear rate of aluminum alloy, not much help in wear resistance of aluminum alloy, and increased filling, etc. Achieve the effect of solving poor adhesion, broadening the scope of use, increasing extreme pressure resistance and oxidation resistance

Inactive Publication Date: 2019-02-12
湖南恒佳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aluminum alloy has been widely used in modern industry due to its excellent thermal conductivity, electrical conductivity, high specific strength and small specific gravity, but its further application is limited due to its soft quality, high friction coefficient and high wear rate.
At present, the hardness and wear resistance of the aluminum alloy surface can be improved after anodic oxidation treatment, and some scholars have tried to fill the porous structure formed after anodic oxidation with self-lubricating materials, hoping to obtain self-lubricating materials on the aluminum alloy surface. Composite materials, but the pore size of the film layer formed by anodic oxidation is generally only a dozen nanometers, which adds great difficulty to the filling. Even if it is filled, only a very thin self-lubricating layer can be obtained. Grinding performance doesn't help much

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Sandblast the aluminum alloy base material, spray with deionized water to remove impurities in the base material, mix 50 parts of aluminum powder, 5 parts of silicon powder, and 20 parts of tungsten disulfide uniformly in parts by mass to form a slurry, and then mix the mixed slurry The material is coated on the aluminum alloy surface by scraping to form a pre-coating, the pre-coating is fully dried at 110°C, and the pre-coating is scanned by laser beam irradiation. The laser beam power is 0.8kW, and the scanning speed is set to 15mm / s, after the molten pool is formed by the pre-coating layer, 20 parts of polyether ether ketone is evenly sprayed on the molten pool by high-pressure inert gas, the inert gas material is nitrogen, and the pressure is 0.8MPa, so as to obtain a Si-Al continuous phase skeleton structure on the surface of the aluminum alloy , tungsten disulfide and polyether ether ketone embedded in the skeleton material self-lubricating wear-resistant layer, t...

Embodiment 2

[0029] Grind the aluminum alloy base material, spray with deionized water to remove impurities in the base material, mix 60 parts of aluminum powder, 3 parts of silicon powder, and 25 parts of tungsten disulfide uniformly in parts by mass to form a slurry, and then pass the mixed slurry through Scratch coating is applied on the aluminum alloy surface to form a pre-coating, the pre-coating is fully dried at 100°C, and the pre-coating is scanned by laser beam irradiation. The laser beam power is 1.0kW, and the scanning speed is set to 20mm / s. After the molten pool is formed by the pre-coating layer, 15 parts of polyetheretherketone is evenly sprayed on the molten pool by high-pressure inert gas, the inert gas material is nitrogen, and the pressure is 0.9MPa, so as to obtain a Si-Al continuous phase skeleton structure on the surface of the aluminum alloy. Tungsten sulfide and polyether ether ketone are embedded in the self-lubricating wear-resistant layer of the skeleton material,...

Embodiment 3

[0031] Grind the aluminum alloy base material, remove impurities from the base material by spraying with deionized water, mix 60 parts of aluminum powder, 5 parts of silicon powder, and 23 parts of tungsten disulfide uniformly in parts by mass to form a slurry, and then pass the mixed slurry through Scratch coating is applied on the aluminum alloy surface to form a pre-coating, the pre-coating is fully dried at 90°C, and the pre-coating is scanned by laser beam irradiation. The laser beam power is 1.0kW, and the scanning speed is set to 15mm / s. After the molten pool is formed by the pre-coating layer, 18 parts of polyether ether ketone is evenly sprayed on the molten pool by high-pressure inert gas, the inert gas material is nitrogen, and the pressure is 0.9MPa, so as to obtain a Si-Al continuous phase skeleton structure on the surface of the aluminum alloy. The self-lubricating wear-resistant layer embedded in tungsten sulfide and polyether ether ketone in the framework materi...

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Abstract

The invention discloses a wear-resistant aluminum alloy. The wear-resistant aluminum alloy comprises an aluminum alloy base material and a self-lubricating composite material attached to the surface of the aluminum alloy base material, wherein the self-lubricating composite material is prepared from the following components in parts by weight: 50-60 parts of aluminum powder, 3-5 parts of silicon powder, 20-25 parts of tungsten disulfide powder and 15-20 parts of polyether-ether-ketone. The invention further discloses a preparation method for the wear-resistant aluminum alloy. According to thewear-resistant aluminum alloy and the preparation method thereof, by means of interface metallurgical bonding, a Si-Al continuous phase framework structure is obtained on the surface of the aluminum alloy, so that the adhesive force of a coating and the base material is improved, meanwhile, tungsten disulfide and the polyether-ether-ketone are inlaid in the framework material to form a self-lubricating wear-resistant layer, so that the friction coefficient of the surface of the aluminum alloy is greatly decreased, and the wear resistance of the aluminum alloy is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a wear-resistant aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloys are widely used in modern industry because of their excellent thermal conductivity, electrical conductivity, high specific strength and small specific gravity. However, the disadvantages of aluminum alloys such as soft quality, high friction coefficient and wear rate limit its further application. At present, the hardness and wear resistance of the aluminum alloy surface can be improved after anodic oxidation treatment, and some scholars have tried to fill the porous structure formed after anodic oxidation with self-lubricating materials, hoping to obtain self-lubricating materials on the aluminum alloy surface. Composite materials, but the pore size of the film layer formed by anodic oxidation is generally only a dozen nanometers, which adds great dif...

Claims

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Application Information

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IPC IPC(8): C23C26/02
CPCC23C26/02
Inventor 蒋继明蒋会阳林建华陈智斌谢芳
Owner 湖南恒佳新材料科技有限公司
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