| FENG Xiao-he.Optimization of Surface Treatment of Alumunium Alloy Catenary Parts in Sandstorm Area[J],45(3):84-88 |
| Optimization of Surface Treatment of Alumunium Alloy Catenary Parts in Sandstorm Area |
| Received:October 26, 2015 Revised:March 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.03.014 |
| KeyWord:aluminum alloy, overhead contact line, sandy area, abrasion, anodic aluminum oxide, micro arc oxidation. |
| Author | Institution |
| FENG Xiao-he |
China Railway Construction Electrification Bureau Group Rail Transit Equipment Co. Ltd, Changzhou , China |
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| Abstract: |
| Objective To improve the abrasion resisting property of part surface of aluminum alloy catenary ,with a view to enhancing the capability of abrasion resistance in wind drift sand regions. Methods The incised parts of aluminum alloy catenary are adopted to making samples needed. Micro-arc oxidation films on the surface of samples is formed in silicate based electrolyte under 20KW DC pulse foe 30minutes.Nss are used to evaluate their corrosion resistance. At the same time, anodic oxidation simples are generated for a contrastive analysis. Results The text results about hardness and abrasive resistance of parts of MAO and anodic oxidation, and the further SEM shows the distinction of the two films. The results come to be that the surface parts through anodic oxidation and MAO can both on a higher level of abrasion resistance. The anodic oxidation film is 350.3Hv in hardness, however, the hardness of MAO film is1510.8Hv, four times higher than the anodic oxidation film. After a 30 minutes’ test in HT-600 high temperature wear and abrasion test machine, the MAO losses its weigh by only 0.15mg, comparing to 0.8mg of anodic oxidation film and 2g of aluminum alloy base. By the way , the MAO films show a better corrosion resistance. Conclusion In the comparative test between micro arc oxidation and anodic aluminum oxide, the result comes out that micro arc oxidation on aluminum alloy surface suites better in the windy and dusty area.
Key words: aluminum alloy, overhead contact line, sandy area, abrasion, anodic aluminum oxide, micro arc oxidation. |
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