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Preparation method for alloy sample surface wear-resisting protective layer

A protective layer and sample technology, applied in the direction of surface reaction electrolytic coating, coating, anodizing, etc., can solve the problem of reducing the lubricating ability and service life of the lubricating film, reducing the friction coefficient, lubricating phase particles and friction surface of aluminum alloy parts The pores cannot achieve the mutual anti-friction effect, etc., to achieve the effect of improving the lubricating performance, reducing the corrosion, and reducing the friction coefficient value.

Inactive Publication Date: 2018-05-11
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through the above means, the friction coefficient of aluminum alloy parts can be greatly reduced during the grinding process. However, due to the lack of consideration of the porous and pore characteristics of the micro-arc oxidation surface, during the friction process, the distance between the lubricating phase particles and the pores of the friction surface may reach Less than the best mutual anti-friction effect, thus reducing the lubricating ability and service life of the lubricating film

Method used

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  • Preparation method for alloy sample surface wear-resisting protective layer
  • Preparation method for alloy sample surface wear-resisting protective layer

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The surface of the aluminum alloy is polished, and the surface roughness is Ra0.8; after alkali washing, pickling and neutralization, the surface is dried to keep the surface clean.

[0044] Put the prepared sample into the electrolyte of the silicate system during micro-arc oxidation. The composition and concentration of the electrolyte are: 8g / LNaSiO 3 , 2g / LCH 3 COOHNa, 3g / LNa 5 P 3 o 10 , PH: 10~11 Put the dried aluminum alloy sample into the electrolyte, adopt the constant current method, the positive and negative current density is 30A / dm 2 , the frequency is 500Hz, and the time is 20min. After micro-arc oxidation treatment, the average pore diameter of the aluminum alloy surface is 3 μm, and the pores between 1 and 5 μm account for 35% of all pores.

[0045] Dissolve 3g / l polyimide powder completely in the ethanol solution, then add molybdenum disulfide powder with an average particle size of 1 μm into the PI / ethanol solution to make the solid phase content ...

Embodiment 2

[0061] The surface of the aluminum alloy is polished, and the surface roughness is Ra0.8; after alkali washing, pickling and neutralization, the surface is dried to keep the surface clean.

[0062] Put the prepared sample into the electrolyte of the silicate system during micro-arc oxidation. The composition and concentration of the electrolyte are: 8g / LNaSiO 3 , 2g / LCH 3 COOHNa, 3g / LNa 5 P 3 o 10 , PH: 10~11 Put the dried aluminum alloy sample into the electrolyte, adopt the constant current method, the positive and negative current density is 30A / dm 2 , the frequency is 500Hz, and the time is 25min. After micro-arc oxidation treatment, the average pore diameter of the aluminum alloy surface is 3 μm, and the pores between 1 and 5 μm account for about 30% of all pores.

[0063] Dissolve 3g / l polyimide powder completely in the ethanol solution, then add graphite powder with an average particle size of 0.7 μm into the PI / ethanol solution to make the solid phase content reac...

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Abstract

The invention relates to a preparation method for an alloy sample surface wear-resisting protective layer. Firstly, an alloy sample is subject to micro-arc oxidation treatment, and a multi-hole micro-arc oxidation layer is obtained on the alloy sample surface; and secondly, a sealant is applied to the alloy sample surface. According to the preparation method, through the technologies of micro-arcoxidation, sealant applying and the like, an even micro-arc oxidation layer and lubrication particle composite self-lubricating wear-resistant coating is prepared on the alloy sample surface, the characteristic that micropores and lubrication particles are organically bonded is effectively used, and the antiseptic, wear-resisting and lubricating properties are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and more specifically relates to a method for preparing a wear-resistant protective layer on the surface of an alloy sample. Background technique [0002] Metal materials are widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries due to their low density, good plasticity, excellent electrical conductivity and thermal conductivity. In actual production, aluminum, magnesium, titanium and other alloys are often used instead of heavier steel materials under the condition that the mechanical strength meets the requirements, so as to reduce the overall weight of the equipment and achieve the purpose of lightweight. However, some alloy parts are prone to friction damage, corrosion and mechanical occlusion, which seriously affect their normal use and even cause functional failure of devices and equipment. important means. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/02C25D11/24C25D11/26C25D11/30
CPCC25D11/026C25D11/246C25D11/26C25D11/30
Inventor 邱从章严雷鸣黄娅婷
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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