微弧氧化提高铝合金耐磨性能的研究

发布时间：2018-11-23 07:54

【摘要】：目的改善铝合金的综合性能,尤其是耐磨性。方法采用微弧氧化技术,在铝合金表面制备具有自润滑效果的微弧氧化陶瓷膜层。通过分析电解参数(电流密度、频级和能级)对微弧氧化陶瓷膜耐磨性的影响,以及添加剂石墨对陶瓷膜厚度、表面形貌、相组成、耐磨性和耐蚀性的影响,探索可以提高铝合金表面微弧氧化陶瓷膜综合性能的电解参数,研究石墨在铝合金微弧氧化中所起的作用。结果确定了最佳电解参数。添加剂石墨不仅降低了铝合金陶瓷膜的摩擦系数,同时也提高了铝合金的耐蚀性。结论在铝合金微弧氧化中,石墨的自润滑特性和超高的导电性促进了铝合金在微弧氧化过程中成膜反应的进行,增加了陶瓷膜层的厚度,同时对试样表面有光滑、整平的作用。
[Abstract]:Objective to improve the comprehensive properties of aluminum alloy, especially the wear resistance. Methods Self-lubricating ceramic coatings were prepared on the surface of aluminum alloy by micro-arc oxidation. The effects of electrolysis parameters (current density, frequency level and energy level) on wear resistance of ceramic membrane were analyzed, and the effect of additive graphite on the thickness, surface morphology, phase composition, wear resistance and corrosion resistance of ceramic film was studied. The electrolytic parameters of ceramic film on aluminum alloy surface can be improved by micro-arc oxidation, and the role of graphite in micro-arc oxidation of aluminum alloy is studied. Results the optimum electrolysis parameters were determined. The additive graphite not only reduces the friction coefficient of aluminum alloy ceramic film, but also improves the corrosion resistance of aluminum alloy. Conclusion in the process of micro-arc oxidation of aluminum alloy, the self-lubricating property and ultra-high conductivity of graphite promote the film forming reaction of aluminum alloy in the process of micro-arc oxidation, increase the thickness of ceramic film, and have the function of smoothing and leveling the surface of the sample at the same time.
【作者单位】：长春师范大学;中国科学院长春应用化学研究所;
【基金】：长春市科技局项目(13KG40)~~
【分类号】：TG174.4

【参考文献】