靜電感應電化學加工法於哈氏合金內管壁拋光特性之研究;Study on the Polishing Characteristics of the Inner Wall of Hastelloy Tubes Using Electrostatic Induction Electrochemical Machining

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题名:	靜電感應電化學加工法於哈氏合金內管壁拋光特性之研究;Study on the Polishing Characteristics of the Inner Wall of Hastelloy Tubes Using Electrostatic Induction Electrochemical Machining
作者:	吳承彥;Wu, Chang-Yen
贡献者:	機械工程學系
关键词:	靜電感應電化學加工法;電解拋光;內孔拋光;鈍化;表面粗糙度;哈氏合金;Electrostatic Induction Electrochemical Machining;Electrolytic polishing;Internal hole polishing;Passivation;Surface Roughness;Hastelloy
日期:	2025-02-19
上传时间:	2025-04-09 18:31:55 (UTC+8)
出版者:	國立中央大學
摘要:	哈氏合金是一種具有高強度和耐腐蝕性的金屬材料，廣泛應用於航空、航太、能源和汽車工業等領域。然而，哈氏合金的表面粗糙度常常需要進行進一步的處理，以滿足特定的應用要求。電解拋光（Electropolishing, EP）是一種利用電化學反應移除材料表面微小凸起的加工方法，能有效改善表面光滑度與減少粗糙度。然而，EP過程中材料移除量較大，對薄壁結構的加工可能導致壁厚過薄的風險。相比之下，靜電感應電化學加工法（Electrostatic Induction Electrochemical Machining, EIECM）是一種新穎的加工技術，通過靜電場輔助進一步最佳化電化學反應，實現均勻的材料移除與更小的材料損耗。這兩種電化學加工方法均能有效提升哈氏合金的表面品質，同時避免了傳統加工方法中的高機械應力及熱影響，適用於要求高精度與高表面品質的應用。因此，本研究欲探討這兩種加工法的差異性與優劣勢，從中提供精密加工有效的解決方案。本研究探討靜電感應電化學加工法在哈氏合金內管壁拋光中的應用特性。相比於EP，EIECM能有效控制材料移除量，並且達到內管壁的拋光，同時減少材料損耗。研究重點包括加工參數如電壓、加工時間、電解液流速、電解液溫度，對表面粗糙度、材料移除率、粗糙度均勻性和鈍化層厚度的影響，並通過實驗測試評估不同條件下的拋光效果。結果顯示，EIECM與EP均能顯著的改善內管壁的表面品質，有效的改善表面粗糙度，而EIECM的材料保留特性優於EP。此方法在薄壁結構加工中表現出更高的加工均勻性與經濟性，適用於高性能合金材料的內壁拋光。 ;Hastelloy is a metal material with high strength and excellent corrosion resistance, widely used in aerospace, energy, and automotive industries. However, the surface roughness of Hastelloy often requires further treatment to meet specific application requirements. Electropolishing (EP) is a chemical reaction-based process that removes surface asperities, effectively improving surface smoothness and reducing roughness. However, during the EP process, significant material removal may occur, posing risks of excessive thinning for thin-walled structures. In contrast, Electrostatic Induction Electrochemical Machining (EIECM) is an innovative technique that utilizes electrostatic fields to optimize electrochemical reactions, achieving uniform material removal with lower material loss. Both methods enhance the surface quality of Hastelloy effectively while avoiding the high mechanical stress and thermal effects associated with conventional processing methods, making them suitable for applications requiring high precision and surface quality. This study aims to explore the differences, advantages, and disadvantages of these two electrochemical processing methods, providing effective solutions for precision machining. This research investigates the application characteristics of EIECM in polishing the inner walls of Hastelloy tubes. Compared to EP, EIECM can effectively control material removal, achieve inner wall polishing, and reduce material loss. The study focuses on processing parameters such as voltage, processing time, electrolyte flow rate, and electrolyte temperature, analyzing their effects on surface roughness, material removal rate, roughness uniformity, and passivation layer thickness. Experimental evaluations under various conditions reveal that both EIECM and EP significantly improve the surface quality of inner tube walls, effectively reducing surface roughness. However, EIECM demonstrates superior material retention properties compared to EP. This method shows higher processing uniformity and cost-effectiveness in thin-walled structure machining, making it well-suited for polishing the inner walls of high-performance alloy materials.
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