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Micro-arc oxidation process method for pre-treating aluminum alloy based on solution and aging

A technology of micro-arc oxidation and solid solution aging, which is applied in anodic oxidation and other directions, can solve the problems of reducing the performance of the oxide film layer and increasing the roughness of the oxide film layer, and achieves uniform and fine distribution of the strengthening phase, good bonding, and improved surface performance effect

Pending Publication Date: 2015-09-30
NANJING INST OF TECH
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Problems solved by technology

Increasing the applied voltage is limited by the performance of the micro-arc oxidation equipment on the one hand, and on the other hand, the excessively high applied voltage will reduce the performance of the oxide film; at the same time, the longer the micro-arc oxidation is, the longer the roughness of the oxide film will be. Spend

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  • Micro-arc oxidation process method for pre-treating aluminum alloy based on solution and aging
  • Micro-arc oxidation process method for pre-treating aluminum alloy based on solution and aging
  • Micro-arc oxidation process method for pre-treating aluminum alloy based on solution and aging

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Embodiment 1

[0039] In order to better illustrate the effect of the process method provided by the present invention, the 6063 aluminum alloy is subjected to solution treatment: 515°C, heat preservation for 55min, furnace cooling; aging treatment: 215°C, heat preservation for 4h, air cooling. The concentration of each component in the electrolyte is, Na 2 SiO 3 : 6g / L; NaOH: 1g / L; NaF 1.0g / L; CoSO 4 0.6g / L. Electrical parameter setting: positive voltage 44V 0; positive voltage frequency 280Hz; positive voltage duty cycle 55%; negative voltage 100V; negative voltage frequency 110Hz; negative voltage duty cycle 30%; ~90μm, mainly composed of α-Al 2 o 3 phase and γ-Al 2 o 3 Dense ceramic membranes composed of phases, such as Figure 1-2 shown.

[0040] Through experimental observation, without solution aging treatment, the thickness of aluminum alloy micro-arc oxidation ceramic layer is relatively thin, but the thickness of the aluminum-impregnated layer obtained after the process of ...

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Abstract

The invention relates to surface treatment of aluminum alloys, in particular to a wear-resisting and anti-corrosion surface treatment method used for an aluminum alloy component, specifically a micro-arc oxidation process method for pre-treating an aluminum alloy based on solution and aging. A micro-arc oxidation technology is adopted for the aluminum alloy component to prepare a wear-resisting and anti-corrosion ceramic layer on an aluminum alloy surface. The micro-arc oxidation process method comprises the following steps: carrying out solution treatment, carrying out ageing treatment, grinding, polishing and carrying out micro-arc oxidation treatment; and after carrying out the micro-arc oxidation treatment, obtaining the ceramic layer which is 80-90 [mu]m in thickness. The micro-arc oxidization ceramic layer prepared by the process method is relatively large in thickness and relatively short in preparation time; the process method has the characteristics of being simple and convenient in process, low in cost, green and environmentally-friendly, high in ceramic layer binding force, suitable for mass production and the like, and can improve the wear resistance and the corrosion resistance of the aluminum alloy surface.

Description

technical field [0001] The invention relates to the surface treatment of aluminum alloys, in particular to a wear-resistant and corrosion-resistant surface treatment method for aluminum alloy parts, specifically, a micro-arc oxidation process based on solid solution aging pretreatment of aluminum alloys. Background technique [0002] Aluminum and its alloys have become the main materials for lightweight manufacturing due to their advantages such as light weight, high specific strength, and good electrical conductivity (thermal). Due to the lack of wear resistance and corrosion resistance of aluminum and its alloys, its wider application is limited. [0003] Microarc Oxidation (Microarc Oxidation), also known as Plasma Microarc Oxidation (Microplasma Oxidation), is a green and environmentally friendly surface treatment technology with good effects. The method of generating spark discharge spots on the surface of the material to form a ceramic film layer under the combined ac...

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Application Information

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IPC IPC(8): C25D11/06C22F1/04
Inventor 王红星毛向阳薛亚军殷俊张成煜朱宏强张月沈彤李博
Owner NANJING INST OF TECH
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