【摘要】 以飞机架构用7075合金为研究对象,通过正交试验法优化了7075合金在NaAlO₂、Na₂SiO₃、Na₂B₄O₇和Na₃PO₄四个电解液体系下的微弧氧化工艺参数最佳方案,并对微弧氧化膜层的厚度、硬度、表面形貌和截面形貌进行了表征。结果表明,7075合金微弧氧化的四种电解液的最佳配方为:NaAlO₂浓度为9g/L、Na₂SiO₃浓度为8 g/L、Na₂B₄O₇浓度为15 g/L、Na₃PO₄浓度为12 g/L,NaOH和三乙醇胺浓度分别为1 g/L和3 g/L;四种优化电解体系的微弧氧化陶瓷膜层的显微硬度的最大值出现在NaAlO₂体系（1091 HV0.1）而陶瓷膜层的最小值出现在Na₃PO₄体系（553 HV0.1）。更多还原

【Abstract】 Orthogonal experiment was carried out on 7075 alloy to optimize the microarc oxidation process in NaAl₀2,Na₂SiO₃,Na₂B4O₇ and Na₃ PO₄ electrolyte systems,respectively.The microarc oxidation film thickness,hardness,surface morphology and cross section morphologies were characterized.The results show that the optimum concentration of the four kinds of electrolyte systems for microarc oxidation of the 7075 alloy that are NaAlO₂（9 g/L）,Na₂SiO₃（8 g/L）,Na₂B₄O₇（15 g/L）,Na₃PO₄（12 g/L）,NaOH and triethanolamine（1 g/L and 3 g/L）,respectively.The maximum microhardness of the microarc oxidation ceramic coatings obtained in the optimized electrolysis system appears in the NaA1O₂ system（1091 HVO.1）,and the minimum value of the ceramic film in the Na₃PO₄ system（553 HVO.1）.更多还原