English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49378/84106 (59%)
造訪人次 : 7370249      線上人數 : 50
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU 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://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/35364


    題名: 電漿滲氮處理對鋼材之鑽石車削性及刀具磨耗影響之研究
    其他題名: Study of the machinability and tool wear mechanisms involved in single point diamond turning of various plasma nitrided steel materials
    作者: 張家榮;Chang, Chia-jung
    貢獻者: 淡江大學機械與機電工程學系碩士班
    趙崇禮;Chao, Choung-lii
    關鍵詞: 單點鑽石車削;電漿滲層處理;表面處理;Diamond turing;Plasma nitriding;Surface treatment
    日期: 2007
    上傳時間: 2010-01-11 06:26:29 (UTC+8)
    摘要: 不鏽鋼及其他的鐵系金屬被歸類為不可鑽石車削加工,因為在鑽石與鐵金屬之間所產生的熱化學反應將造成不可接受的磨耗。近年來已有研究將不鏽鋼試片在低溫的狀態(<450℃)用離子氮化來增加沃斯田鐵基材中的鐵原子與氮原子形成γ-Fe4N的硬層。本研究鑽石車削的實驗在下列加工參數中完成:單點鑽石刀具、最大切削速度180m/min、最大切深至5μm以及使用少量的無機油當作切削液。結果顯示在相同的參數下車削不鏽鋼時會獲得快速的刀具磨耗和不好的表面粗糙度,而車削經過離子氮化的試片會得到3nm以下的表面粗糙度且刀腹磨耗小於0.5μm。可發現經由表面處理之鋼材所造成之刀具磨耗比無表面處理時改善許多。
    本研究將不同鉻含量鋼材,STAVAX不鏽鋼、H13工具鋼與SKD61工具鋼,三種材料在電漿離子滲氮表面處理後,經由單點鑽石車削加工,在不同鉻含量鋼材中刀具磨耗會隨鉻含量減少而有明顯降低情形。
    Stainless steel and other ferrous metals are normally classified as not diamond turnable for the unacceptable tool wear caused by the thermal-chemical reaction between diamond and ferrous metals. In the present research, stainless steel specimens were plasma nitrided at a relatively low temperature (<450oC) to prevent the depletion of Cr content at the austenite matrix and to give a hardened layer where Fe atoms are bonded to nitrogen atom to form γ’-Fe4N. Diamond turning experiments were subsequently carried out under the following machining conditions: single crystal diamond tool, cutting speed up to 180 m/min, cut depth up to 5um and light mineral oil as the cutting fluid. The results showed that, given the same machining conditions while rapid tool wear and poor surface finish were obtained when diamond turning the untreated stainless steel, surfaces with Ra around 8nm and flank wear up to 5um were observed on turning the plasma treated surface where too much CrxN instead of FexN were formed on the surface. Surfaces with Ra better than 3 nm and very low tool wear (<0.5um flank wear) were achieved on turning the plasma nitrided stainless steel. This means that the surface treatment has profound effects on the tool wear and it is possible to reduce tool wear and improve surface finish by carefully modifying the microstructure of the surface.
    顯示於類別:[機械與機電工程學系暨研究所] 學位論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    0KbUnknown230檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋