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研究生： 郭威廷
Guo, Wei-Ting
論文名稱： 噴覆成型高矽量Al-Si-Cu-Mg-Ni及Al-Si-Zn-Fe-Mg合金之高溫機械性質與磨耗性質探討
Study of Elevated Temperature Mechanical Properties and Wear Properties of High Si-Containing Al-Si-Cu-Mg-Ni and Al-Si-Zn-Fe-Mg Alloys Synthesized by Spray Forming Process.
指導教授： 曹紀元
Tsao, Chi-Yuan
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學及工程學系
Department of Materials Science and Engineering
論文出版年： 2016
畢業學年度： 104
語文別： 中文
論文頁數： 119
中文關鍵詞： 鋁矽合金 、噴覆成型 、背向式擠型 、高溫機械性質 、磨耗性質
外文關鍵詞： Al-Si alloys, Spray-formed, Backward extrusion, Thermomechanical properties, Wear properties
相關次數： 點閱：162  下載：2 
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    • 機車引擎工作溫度約在150~250℃，且活塞與汽缸套之間劇烈地往復運動作用，其主要與汽缸套對磨的為活塞上之活塞環，活塞環須密封燃燒室內的可燃混合氣體以及刮除汽缸上多餘的機油，且活塞環材質通常為較硬之鋼材或球墨鑄鐵，因此汽缸套材料需有較好之高溫熱機性質及耐磨耗性質。
    一般鋁合金的耐磨耗性、高溫強度、熱膨脹係數等性質上不具有特殊優勢。但若在鋁合金中加入高量之矽元素，則可同時大幅改善以上問題。在傳統製程中，過共晶Al-Si 合金會有粗大初晶矽，造成其延展性下降，難以進行後續加工與成型。本研究即針對超高矽鋁合金進行開發，主要利用合金設計與先進之「噴覆成型」製程製作出具有等軸細小初晶矽的高矽鋁合金。
    本研究利用背向式擠型加工噴覆成型之高矽鋁合金，並探討不同擠型溫度、應變速率下對於材料顯微組織之影響、高溫機械性質、磨耗性質，並從晶粒、矽顆粒、其他析出相進行分析，藉由高溫拉伸試驗及磨耗試驗之結果，建立資料庫提供開發機車引擎汽缸套之參考。

    In this study, high Si-containing aluminum alloys synthesized by spray-formed are extruded. The author study the effects of different extrusion parameters on the microstructure, tensile properties and wear properties at elevated temperature. Establishing a database to develop cylinder liner for motorcycle engine with the results of tensile test and wear test at elevated temperature.
    Thermo-calc analysis is similar with microstructure of AC9A-30Si and AZFM-30Si synthesized by spray forming. Different extrusion parameters will influence microstructure of AC9A-30Si, AZFM-30Si.
    AC9A-30Si extruded at 500℃,0.1s-1 have highest peak stress, yield stress but lowest elongation. AZFM-30Si extruded at 500℃,0.1s-1 and etched have better wear resistance.

    中文摘要 I 英文延伸摘要 II 誌謝 VII 目錄 VIII 表目錄 XI 圖目錄 XII 第一章 序論 1 1-1 前言 1 1-2 研究目標 2 第二章、文獻回顧與理論基礎 3 2-1 鋁矽合金 3 2-2 噴覆成型製程 6 2-3 金屬基複合材 7 2-3-1 金屬基複合材的強化機制 7 2-3-2 金屬基複合材的變形機制 8 2-3-3 金屬基複合材的破壞機構 10 2-4 背向式擠型 11 2-5 磨耗行為 12 2-5-1 磨耗機制 12 2-5-2 鋁矽合金的乾式滑移磨耗行為 13 2-5-3 潤滑機制 15 2-5-4 表面粗糙度 15 2-5-5 摩擦層(或機械混合層) 17 第三章、實驗方法及步驟 18 3-1 噴覆成型過共晶鋁矽合金 18 3-2 成份分析與相鑑定分析 18 3-3 背向式擠型加工 18 3-4 硬度試驗 19 3-5 高溫拉伸試驗 19 3-6 磨耗試驗 20 3-7 顯微組織與表面形貌分析 21 3-8 其他分析 22 第四章、結果與討論 23 4-1 噴覆成型材料及其顯微組織 23 4-1-1 Thermo-Calc 軟體模擬 23 4-1-2 噴覆成型材料之顯微組織 24 4-2 背向式擠型加工及其顯微組織 26 4-2-1 AC9A-30Si 擠型材之顯微組織 26 4-2-2 AZFM-30Si擠型材之顯微組織 29 4-2-3 AC9A-30Si與AZFM-30Si擠型材之顯微組織比較 30 4-3 高溫機械性質分析 31 4-3-1 擠型參數對AC9A-30Si高溫機械性質之影響 31 4-3-2 AC9A-30Si高溫拉伸之破斷面分析 35 4-3-3 不同合金系統對高溫機械性質之影響 36 4-4 磨耗試驗 37 4-4-1 磨耗試驗前之鋁矽合金表面形貌 37 4-4-2 AC9A-30Si磨耗性質探討 38 4-4-3 AZFM-30Si磨耗性質探討 40 4-4-4 不同合金系統對磨耗性質之影響 41 4-4-5 接觸電阻與摩擦係數 43 第五章、結論 46 參考文獻 51

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