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Electrochemical micromachining on titanium using the NaCl-containing ethylene glycol electrolyte
Journal of Materials Processing Technology ( IF 6.3 ) Pub Date : 2018-05-01 , DOI: 10.1016/j.jmatprotec.2018.01.009
Weidong Liu , Hui Zhang , Zhen Luo , Chunfeng Zhao , Sansan Ao , Feng Gao , Yubo Sun

Abstract Titanium has been widely applied in industry owing to its excellent properties such as low density, high strength, and corrosion resistance. Compared with traditional mechanical methods, electrochemical micromachining (EMM) has some inherent advantages for the shaping of hard metallic materials; therefore, it is a promising method for the micromachining of titanium. However, the high corrosion resistance of titanium owing to its stable oxide film is a drawback during EMM. To overcome this limitation, a novel electrolyte, NaCl-containing ethylene glycol (EG) solution, was applied in this study. The polarization behavior of titanium in the NaCl water-based and ethylene-glycol-based solutions was comparatively analyzed. In contrast to that in the water-based solution, no oxide film was formed during anodization in the NaCl-containing EG solution. This characteristic could potentially improve the machining performance of the EMM of titanium. Subsequently, the effect of the main process parameters on the machining performance was investigated. Accordingly, peak voltage of 40 V, pulse width of 25 μs, and feeding rate of 1 μm s−1 were selected as the optimum parameters. Using the optimum parameters, a high-quality microhole with 149.5 μm average diameter, 300 μm depth, and 7.6° taper angle was successfully EMM machined on titanium.

中文翻译:

使用含 NaCl 的乙二醇电解液对钛进行电化学微加工

摘要 钛以其密度低、强度高、耐腐蚀等优异性能在工业上得到广泛应用。与传统的机械方法相比,电化学微加工(EMM)在硬质金属材料的成形方面具有一些先天优势;因此,它是一种很有前途的钛微加工方法。然而,钛由于其稳定的氧化膜而具有高耐腐蚀性是 EMM 过程中的一个缺点。为了克服这一限制,本研究采用了一种新型电解质,即含 NaCl 的乙二醇 (EG) 溶液。比较分析了钛在NaCl水基溶液和乙二醇基溶液中的极化行为。与水性溶液相比,在含 NaCl 的 EG 溶液中阳极氧化过程中没有形成氧化膜。这种特性可能会提高钛金属 EMM 的加工性能。随后,研究了主要工艺参数对加工性能的影响。因此,40 V 的峰值电压、25 μs 的脉冲宽度和 1 μm s-1 的进料速率被选为最佳参数。使用最佳参数,在钛上成功地加工出平均直径为 149.5 μm、深度为 300 μm、锥角为 7.6° 的高质量微孔。和 1 μm s-1 的进料速率被选为最佳参数。使用最佳参数,在钛上成功地加工出平均直径为 149.5 μm、深度为 300 μm、锥角为 7.6° 的高质量微孔。和 1 μm s-1 的进料速率被选为最佳参数。使用最佳参数,在钛上成功地加工出平均直径为 149.5 μm、深度为 300 μm、锥角为 7.6° 的高质量微孔。
更新日期:2018-05-01
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