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研究生： 張志鴻
Chih-Horng Chang
論文名稱： 銀含量對於Ａ201鑄造鋁合金Ω相析出影響
指導教授： 李勝隆
Sheng-long Lee
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 88
語文別： 中文
論文頁數： 35
中文關鍵詞： A201鑄造鋁合金 、Ω相 、Al-Cu-Mg-Ag合金
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    • 實驗設計四種銀含量試片，分別為0 wt% Ag 、0.3 wt% Ag、0.6 wt% Ag與0.9 wt% Ag含量的Al-5Cu-0.3Mg合金，經過T7熱處理後，以光學顯微鏡（OM）、電子微探儀（EPMA）、導電度（%IACS）、微差掃描熱分析（DSC）與穿透式電子顯微鏡（STEM）分析微結構變化。另外施以T7處理和185℃×90小時之長時效處理，進行拉伸強度與硬度之試驗，以暸解不同銀含量對於Ω相析出的影響。
    由ＤＳＣ試驗中各析出、回溶反應來看，塊狀A201合金中的強化相的析出順序為：
    過飽和固溶體→GP(I)→GP(II)→Ω相→θ''相→θ相
    由ＤＳＣ與硬化曲線中可得知Ω相在高溫下較θ''相安定。此外整體實驗結果顯示出T7熱處理之下，合金成份含銀量0.3 wt% 即能有效地促使Ω相析出，銀含量0.6 wt%時效果最佳，含銀量達0.9 wt%時卻無法促使Ω相更大量地析出。

    誌謝 ……………………………………………………………… I 摘要 ……………………………………………………………… II 總目錄 …………………………………………………………… III 圖目錄 …………………………………………………………… V 表目錄 …………………………………………………………… VI 壹、 前言 ………………………………………………………… 1 一．A201鑄造鋁合金簡介 ……………………………………… 1 二．A201合金之熱處理與析出強化作用 ……………………… 2 三．Ω相的特性及對機械性質之影響 ………………………… 3 貳、 研究方法與步驟 ………………………………………… 5 一．合金配製 …………………………………………………… 5 二．合金熱處理 ………………………………………………… 5 三．微結構分析 ………………………………………………… 6 1. ＯＭ金相觀察 ………………………………………………… 6 2. EPMA 及 TEM 分析 ………………………………………… 6 3. 導電度量測 ………………………………………………… 6 4. 微差掃描熱分析 …………………………………………… 6 四．機械性質分析 …………………………………………… 7 參、 結果與討論 ……………………………………………… 10 ㄧ．微結構分析 ……………………………………………… 10 1. 金相觀察及電子微探儀分析 ……………………………… 10 2. 導電度量測（%IACS） …………………………………… 11 3.微分掃瞄熱分析（DSC）…………………… ……………… 12 二．機械性質分析 …………………………………………… 16 1. 硬度量測 …………………………………………………… 16 2. 拉伸試驗 …………………………………………………… 18 肆、 結論 ……………………………………………………… 31 伍、 參考文獻 ………………………………………………… 32

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