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Student Number 93323046
Author Cheng-Ting Tsai(蔡政廷)
Author's Email Address 93323046@cc.ncu.edu.tw
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Department Mechanical Engineering
Year 2005
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 有關汽車熱交換器用3003鋁合金擠製成形性及硬銲特性之研究
Date of Defense 2006-07-07
Page Count 76
Keyword
  • 3003 aluminum alloy
  • brazing
  • dispersoid
  • extrusion
  • Abstract The precipitation behavior of dispersoids isn’t the same by different homogenization conditions in AA3003 aluminum alloy. It has been found that fine dispersoids form during homogenization at 460℃x9h and lower density of forming dispersoids during homogenization at 600℃x9h. Homogenization at low temperature is inclined to precipitate grey particle Al6(Mn,Fe) and black particle α- Al12(Mn,Fe)3Si at high temperature. To raise homogenization temperature with time, the grey particle Al6(Mn,Fe) tends to solute into matrix and form black particle α- Al12(Mn,Fe)3Si.
      The extrusion pressure is determined both with the degree of solution and distribution of dispersoids after homogenization. If the density of dispersoid isn’t high enough, solution would play an important role for extrusion pressure. However, the influence of solution will be replaced by dispersoids when distribution of dispersoids is close. 
      The recrystallization will influent strength of material after extrusion. The position where recrystallization have lower strength. The results indicated that condition (a) 460℃x9h homogenization treatment could get the best strength after brazing, the next was the condition (b) and condition (d), and the worst was the condition (c)
    600℃x9h→460℃x9h due to happening of secondary recrystallization.
    Table of Content 摘要I
    謝誌III
    目錄Ⅳ
    表目錄Ⅶ
    圖目錄Ⅷ
    第一章 緒論1
    一.序言1
    二.理論基礎與論文回顧2
    2.1鑄造對3003鋁合金之影響2
    2.2均質化處理對3003鋁合金之影響3
    2.3擠型塑性加工法5
    2.3.1擠製過程中組織結構之變化6
    2.4擠型性之評估7
    2.4.1流變應力(Flow Stress)7
    2.4.2擠製壓力8
    2.4.3擠製速度8
    2.4.4擠製條件對擠型性之影響9
    2.5再結晶的機構10
    2.6二次再結晶(Secondary recrystallization)11
    第二章 本文12
    一.前言12
    二.實驗方法與步驟14
    2.1 均質化熱處理14
    2.2 擠型過程14
    2.3 硬銲處理15
    2.4 導電率測試15
    2.5 OM光學顯微鏡觀察16
    2.6 硬度量測16
    2.7 拉伸試驗17
    2.8 TEM穿透式電子顯微鏡觀察17
    三. 結果與討論19
    3.1均質化熱處理19
    3.1.1導電率量測19
    3.1.2光學顯微鏡觀察(OM)20
    3.1.3電子顯微鏡觀察(TEM)21
    3.2擠製塑性加工23
    3.2.1擠製突破壓力與導電率分析23
    3.2.2擠製途中晶粒組織與分散相粒子分析25
    3.2.3擠製件均勻度與強度探討27
    3.3硬銲處理28
    3.3.1硬銲後導電率變化29
    3.3.2硬銲後晶粒組織變化與強度探討29
    四.結論31
    五.參考文獻32
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    [7] 歐炳隆,劉實中,碩士論文”汽車熱交換器扁平冷凝管用鋁合金
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    [8] Wolf-Dieter Finkelnburg ,Günther Scharf : ET’92 vol II ,
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    [13] Lefstad, Martin & Reiso, Oddvin : Proceedings of Sixth
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    [14] 岡庭 茂 : 日本輕金屬學會., vol. 45. No. 8., (1995) , 471.
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    [16] Paul Robbins : Proceedings of Sixth International Aluminum
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    [18] T. Sheppard : Metal Technology., (1981) , 130.
    Advisor
  • Bin-Lung Ou(歐炳隆)
  • Files
  • 93323046.pdf
  • disapprove authorization
    Date of Submission 2006-07-18

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