【摘要】 用微弧氧化技术对铝合金表面进行强化处理,利用正交试验设计优化试验方案,按五因素(Na2SiO3浓度、KOH浓度、H3BO3浓度、H2O2浓度、微弧氧化电压)、四水平得到正交表,合理安排微弧氧化试验,达到优化微弧氧化工艺条件的目的;并用综合平衡法评价各因素对陶瓷膜硬度和厚度影响的主次顺序和可能最优水平。结果表明,铝合金微弧氧化陶瓷膜的硬度和厚度受各因素水平的影响显著,其中Na2SiO3的浓度对陶瓷膜硬度和厚度两指标的影响最大;在最优工艺条件下(Na2SiO3浓度6 g/L、H3BO3浓度1.5 g/L、KOH浓度0.5 g/L、H2O2浓度X4、微弧氧化电压340V),陶瓷膜致密层硬度达到1 700 HV,膜层总厚度约200μm。更多还原

【Abstract】 Applying the technology of micro-arc oxidation to strengthen handling the surface of aluminum alloy,optimal experiments were designed by orthogonal experimental and the orthogonal table was gained according to five elements(concentration of Na2SiO3,concentration of KOH,concentration of H3BO3,concentration of H2O2,micro-arc oxidation voltage) and four levels,carry out the micro-arc oxidation experiments appropriately,for the aim to obtain conditions in which micro-arc oxidation technics can be optimized,using the integral balanceable method to estimate the possibly optimal level and evaluate the primary and secondary order of effect to the hardness and thickness of ceramic coating caused by different elements.The results show that the hardness and thickness of micro-arc oxidation ceramic coating on aluminum alloy are effected observably by each element,especially by the concentration of Na2SiO3.In the optimal technics condition(6 g/L Na2SiO3,1.5 g/L H3BO3,0.5 g/L KOH,X4H2O2,340 V micro-arc oxidation voltage),ceramic coating can reach 1 700 HV in hardness and 200 μm in thickness approximately.更多还原