| WANG Ying-cai,CHEN Sui-yuan,LIU Ping-ping.Preparation and Characterization of Hard Anodic Oxidation Film on LC4 Aluminum Alloy Surface[J],43(4):37-42 |
| Preparation and Characterization of Hard Anodic Oxidation Film on LC4 Aluminum Alloy Surface |
| Received:March 17, 2014 Revised:June 30, 2014 |
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| DOI： |
| KeyWord:LC4 aluminum alloy anodic oxide film positive and negative pulse waveform hardness |
| Author | Institution |
| WANG Ying-cai |
Shenyang Hangtian Xinle Co. Ltd, Shenyang , China |
| CHEN Sui-yuan |
Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University, Shenyang , China |
| LIU Ping-ping |
Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University, Shenyang , China |
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| Abstract: |
| Objective The hard anodic oxidation films were prepared on the surface of the LC4 aluminum alloy and the effects of different parameters on the thickness and hardness of the films were discussed. Methods By optimizing parameters of the anodic oxidation time, temperature, current density and the positive and negative pulse time ratio, the thickness, hardness and microstructure of the films were studied by means of OM, SEM, XRD, and hardness tester. Results The optimized parameters were: a temperature of-2 ~ 0 ℃ , a positive pulse current density of 4 A / dm3 , a negative pulse current density of 1 A / dm3 , a positive and negative pulse current time ratio of 6 : 1, and an oxidation time of 50 min. The structure of the oxide film on LC4 aluminum alloy was composed of a series of tubular cells with a diameter of 50 nm, the thickness of anodic oxidation film was 36 μm, and the hardness was 420HV. Conclusion The anodic oxidation film had fine structure and high hardness. |
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