臺灣博碩士論文加值系統

本研究以添加不同含量的鎳元素對灰鑄鐵的顯微組織、硬度及電化學特性進行分析；實驗採用真空感應熔煉方式配製成含有鎳的鑄錠，熔煉完成後進行熱處理。實驗結果顯示，隨著鎳含量的增加，石墨呈粗片狀轉變成細小片狀石墨；透過能量散佈光譜分析儀進行微區元素分析後，鎳在灰鑄鐵基地中分佈相當均勻；電化學加速腐蝕的測量結果來看，鎳元素能提高灰鑄鐵耐蝕性；經熱處理後硬度略有增加，片狀石墨也有細化的現象產生；此外，隨著鎳含量的增加，硬度會逐漸降低。

In the present study, the effect of varying nickel content on the microstructure, hardness, and electrochemical behavior of gray cast iron were investigated. The as-cast samples evaluated were produced by vacuum induction melting followed by heat treatment. The results of microstructural examination revealed that the morphology of the graphite flakes changed from coarse flakes to fine and small flakes as the amount of nickel increased. Elemental mapping analysis using energy dispersive spectroscopy indicated that the nickel was fairly evenly distributed in gray cast iron. Electrochemical measurements showed that the gray cast iron with high nickel content improved the corrosion resistance. After heat treatment the thickness of graphite flakes was decreased and hardness of gray cast iron samples showed slightly increase. Besides, the increasing nickel content caused to a progressive decrease in hardness.

摘要...i
Abstract...ii
誌謝...iii
目錄...iv
表目錄...v
圖目錄...vi
第一章 緒論...1
前言...1
第二章 理論基礎及文獻回顧...2
2.1 鑄鐵簡介...2
2.2 合金元素對鑄鐵的影響...7
2.3 石墨型態...9
2.4 鑄鐵熱處理...11
2.5 腐蝕與電化學特性...14
2.6 國內外相關研究...15
第三章 實驗方法...18
3.1 實驗流程...18
3.2 坩鍋製備...20
3.3 真空感應鑄造...21
3.4 熱處理實驗...23
3.5 顯微組織分析...25
3.6 硬度試驗...26
3.7 掃描式電子顯微鏡及能量光譜儀分析...27
3.8 X光繞射儀(X-Ray Diffraction, XRD)...28
3.9 電化學試驗...29
第四章 結果與討論...31
4.1 顯微組織分析...31
4.2 X-ray繞射分析...34
4.3 SEM及EDS相成分分析...36
4.4 微硬度分析...53
4.5 電化學分析...54
第五章 結論...70
參考文獻...71
Extended Abstract...74

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