冯晓河.大风沙地区铝合金接触网零部件表面处理的优选[J].表面技术,2016,45(3):84-88.
FENG Xiao-he.Optimization of Surface Treatment of Alumunium Alloy Catenary Parts in Sandstorm Area[J].Surface Technology,2016,45(3):84-88 |
| 大风沙地区铝合金接触网零部件表面处理的优选 |
| Optimization of Surface Treatment of Alumunium Alloy Catenary Parts in Sandstorm Area |
| 投稿时间：2015-10-26 修订日期：2016-03-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.03.014 |
| 中文关键词: 铝合金 接触网 风沙地区 磨损 阳极氧化 微弧氧化 |
| 英文关键词:aluminum alloy, overhead contact line, sandy area, abrasion, anodic aluminum oxide, micro arc oxidation. |
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| 中文摘要: |
| 目的 提高铝合金接触网零部件表面耐磨损性能，以增加其在大风沙地区的使用寿命。方法 对接触网零件切割进行试样制备。在硅酸盐体系电解液中，采用20kW直流脉冲微弧氧化设备对试样表面进行微弧氧化处理，电解液为硅酸盐，氧化时间为30min。同时制备阳极氧化处理的平行试样。通过硬度测试、摩擦磨损试验以及扫描电子显微镜（SEM）测试，分别评价两种表面处理方式的表面硬度、耐磨性能，利用中性盐雾试验来评价其耐腐蚀性能。并通过扫描电子显微镜来观察两种膜层的差异。结果 通过对铝合金接触网进行阳极氧化和微弧氧化处理能明显提高表面耐磨性。阳极氧化膜层硬度为350.3Hv，微弧氧化膜层硬度约为阳极氧化膜硬度的4倍，达到1510.8Hv。经过HT-600高温摩擦磨损试验机30min的磨损试验，铝合金基体失重2mg，阳极氧化膜失重0.8mg，而微弧氧化膜的失重量只有0.15mg左右，且微弧氧化膜层表现出了更好的耐腐蚀性能。结论 通过试验数据的比较，结果表明微弧氧化膜层能表现出更加优异的耐磨及耐腐蚀性能。因此，相比之下，微弧氧化更适合大风沙地区铝合金零件的表面处理。 |
| 英文摘要: |
| 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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