Preparation method for quick in-situ growth of ultrathin wear-resisting coating on surface of aluminum alloy irregular part

An in-situ growth and wear-resistant coating technology, applied in anodic oxidation and other directions, can solve the problems of easy wear of the film layer, and achieve the effects of environmental protection, improved friction performance, and high bonding strength
CN103526255AActive Publication Date: 2014-01-22HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2014-01-22

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Abstract

The invention discloses a preparation method for quick in-situ growth of an ultrathin wear-resisting coating on the surface of an aluminum alloy irregular part, relates to a preparation method of an aluminum alloy surface coating, and aims to solve the technical problem that the film obtained when parts of an LY12 aluminum alloy irregular part are treated by a micro-arc oxidation technology is easy to wear. The method comprises the following steps: I, surface pretreatment of the LY12 aluminum alloy irregular part; II, preparation of an electrolyte, wherein the electrolyte is prepared from a main film-forming agent, an auxiliary film-forming agent, potassium hydroxide, glycerol, polyethylene glycol 1000 and distilled water; III, micro-arc oxidation, wherein the ultrathin wear-resisting coating is quickly obtained on the surface of the LY12 aluminum alloy irregular part. The thickness of the film of the ceramic film is 5-15 mu m, the average friction coefficient of the film is 0.12-0.20, and the bonding strength of the film is 14-30MPa. The preparation method can be applied to structural connectors of spacecrafts.
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Description

technical field

[0001] The invention relates to a preparation method of an aluminum alloy surface coating. Background technique

[0002] With the development of spacecraft in the fields of military, science, and life, its design gradually changes from single-function to multi-function, which makes the payload of spacecraft continue to increase. Therefore, the lightweight of spacecraft structural components is proposed. Higher requirements, seeking light and wear-resistant materials and corresponding technical means to solve the problem of periodic wear and tear of spacecraft structural components, in order to cope with the development concept of lightweight and large-scale spacecraft today. High-strength, low-density materials are the first choice for the design concept of spacecraft structures, as a benchmark for improving the efficiency of spacecraft structures. Among all structural materials, aluminum alloy is a light and low-cost metal with a low density (1.82g / cm 3 ),...

Claims

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