臺灣博碩士論文加值系統

目前國內AA6105鋁合金等材料國內並無生產而全由國外進口，且因合金元素規範為範圍，故進口的合金元素變異程度大，導致成分之不穩定性而使製程不易控制以符合性能且良率偏低。另一方面，為呼應近代工業在節能減碳製程上的追求，探討是否能全面以T5製程以減化重複加熱程序而達到AA6105各規範性能，並探討材料因成分差異與時效時間不同對其機械性質的影響。
本研究選擇三種不同成分的之AA6105鋁合金，並進行相同之T5製程處理條件：(1) 均質化：565℃持溫6小時；(2) 擠型：505℃持溫2小時之預熱、2.9 mm/sec擠速；(3)擠製後，立即進行在線淬火；(4)人工時效：175℃之8、10、12、14小時持溫，並將各種條件之試樣進行拉伸試驗與微觀組織觀察。透過機械性能與微觀組織分析，三種材料皆可透過T5製程達到AA6105規範性能，亦即T6處理製程中之固溶程序是可以併入擠製預熱程序中而減化且不至影響材料最終可達規範性能。只是隨著原始材料的化性與組織差異，均質化與時效參數需搭配作調整，以使材料達特定之抗拉強度需求。

The raw materials of aluminum alloy 6105 all are imported presently, and hence have variance in chemical components due to the ranges of the chemical composition limit. The instability of the chemical composition leads to difficulty in controlling the processing for the requirement and yield loss. On the other hand, for responding low-carbon economy in modern industry, we discuss whether the T5 treatment could be applied comprehensively to reduce the reheating for solution process of the T6 treatment and still meet any requirements in the standard specification, and also discuss the influences of the components and aging time on mechanical properties.
In this study, three aluminum alloy 6105s with variance in chemical composition were treated via the same T5 processes: first, homogenized at 565⁰C for 6 hr; second, preheated at 505⁰C for 2 hr and extruded at 2.9 mm/sec; third, quenched on line immediately; fourth, artificial aged at 175⁰C for 8, 10, 12, 14 hr, respectively. The specimens of these conditions were prepared for tension testing and microstructure observation. Through the analyses, these three aluminum alloy 6105s could conform the requirements of the standard specification via T5 treatment, i.e., the solution process in T6 treatment could be accomplished in the preheating process before extrusion process in T5 treatment for reducing purpose and without influence on mechanical properties. For the variance of the chemical composition and microstructure, the parameters of homogenization and aging processes need to be considered in coordination for a specific tensile strength.

目錄
摘要
Abstract
誌謝
目錄
表目錄
圖目錄
一、緒論
1.1 前言
1.2 文獻回顧
1.2.1 鋁合金概述
1.2.2 鑄造鋁合金代號
1.2.3 鍛造鋁合金種類
1.2.4 合金元素添加的影響
1.2.5 鋁合金熱處理代號
1.2.6 均質化對鋁合金之影響
1.3 研究動機與目的
1.4 論文架構
二、研究理論
2.1 Al-Mg-Si 合金簡介
2.2 合金強化機構
2.2.1 固溶強化 (solid solution hardening)
2.2.2 應變硬化(strain hardening)
2.2.3 析出硬化(precipitation hardening)
2.3 析出硬化理論
2.3.1 Al-Mg-Si合金析出硬化
2.3.2 Al-Mg-Si合金析出序列及影響
三、實驗方法與設備
3.1 實驗流程
3.2 試片準備
3.2.1 鋁錠的準備
3.2.2 光譜分析化學成分
3.2.3 擠製成型
3.2.4 均質化處理
3.2.5 時效處理
3.3 機械性質測量
3.3.1 拉伸試驗
3.4 材料組織觀察
3.4.1微觀組織觀察試片
3.4.2 電解拋光
3.5 實驗設備
四、結果與討論
4.1 機械性質
4.1.1 抗拉強度與伸長率分析
4.2 微觀組織
4.2.1 OM金相觀察
4.2.2 XRD分析
4.2.3 SEM與EDS分析
五、結論
5.1 結論
參考文獻
表格
圖片
簡歷

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