English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 64745/64745 (100%)
造訪人次 : 20399031      線上人數 : 405
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/2648


    題名: 含Sc、Cu之A201合金銲條的銲補性 及常溫、高溫機械性質研究
    作者: 林進貴;C-K Lin
    貢獻者: 機械工程研究所碩士在職專班
    關鍵詞: hot cracking;TIG;A201
    日期: 2006-06-29
    上傳時間: 2009-09-21 11:52:54 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 本研究主要目的在探討含Sc、Cu之A201合金焊條的焊補性及常溫、高溫機械性質之研究。 結果顯示Al-Cu-Mg-Ag-Sc-Zr合金,於凝固時便晶出Al3(Sc,Zr)相,使晶粒細化。而W(Al5.4-8Cu6.6-4Sc)相的形成消耗了部分Cu元素,且無法經由固溶處理回溶於基地內,使得Cu原子固溶量減少,導致θ’及Ω相析出量減少而降低合金強度及硬度。提高Cu含量後,可增加鋁基地中Cu原子固溶量,提升材料強度。 此外,以含Sc、Cu之A201銲料合金,於母材A201合金上實施TIG銲接後之銲件,其銲道組織皆為等軸細小晶粒,且無熱裂發生;銲件經T7後之常溫(25℃)抗拉強度為母材A201合金之91%,延性和母材A201合金相近;銲件經T7後之高溫(150℃、230℃) 抗拉強度分別為母材A201合金之90%及95%,延性和母材A201合金相近。 The study for the purpose of fusion welding and Mechanical Properties of room temperature and high temperature of A201 alloy casting with A201 alloy containing Sc and Cu as filler metal . Addition of Sc and Zr to Al-Cu-Mg-Ag alloys produces grain refinement due to the formation of primary Al3(Sc,Zr) intermetallic phase during solidification. The formation of W(Al5.4-8Cu6.6-4Sc) phase consumes the parts of Cu content, and can’t dissolve in subsequent solution treatment. As a result, the available amount of Cu which is dissolved in matrix reduces, diminishing the precipitates of Ω and θ’ phase, and the hardness and strength decrease. After increasing Cu content, the available amount of Cu in Al-matrix will be raised, and the strength of material will be promoted. Further A201 alloy containing Sc and Cu as filler metal,the base metal is A201 alloy,in TIG (tungsten inert gas) welds.After welding,the grain of fusion zone fine equiaxed dendritic structure and has no hot cracking .The ultimate strength at room temperature of welding bar that has been T7 is 91% of A201 alloy.The elongation at room temperature of welding bar that has been T7 is similar to A201 alloy. The ultimate strength at high temperature(150℃、230℃) of welding bar that has been T7 is 90% and 95% of A201 alloy separately.The elongation at high temperature(150℃、230℃) of welding bar that has been T7 is approaching A201 alloy.
    顯示於類別:[機械工程學系碩士在職專班 ] 博碩士論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    0KbUnknown853檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋  - 隱私權政策聲明