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研究生:楊聰賢
論文名稱:以Ni3Al作為鑽石刀具基材之製程研究
指導教授:黃坤祥黃坤祥引用關係
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:材料科學與工程學研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
論文頁數:107
中文關鍵詞:擬熱均壓反應燒結鎳鋁介金屬鑽石刀具切削性能
外文關鍵詞:pseudo-hippingreaction sinteringnickel aluminidediamond toolwear performance
相關次數:
  • 被引用被引用:4
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摘要
鑽石刀具依基地可分為金屬基、樹脂基…等,其中金屬基材( metal-matrix )的鑽石刀具( diamond cutting tool )最為普遍,已被大量地使用在切削石材、陶瓷、碳化物等硬脆材料上,而目前使用的金屬基鑽石刀具中多以鈷為主要基材,但是由於鈷之價格高,且為重要的戰略物質,所以發展取代鈷的新材料就極其重要。
本研究之目的在於利用擬熱均壓及反應燒結並行之情況下製造Ni3Al基之鑽石刀具,探討此製程對鑽石的影響,並對刀具的磨耗表現作深入的分析研究,期望能改善鑽石刀具的切削性能與壽命,並且利用Ni3Al強度隨著溫度上升而提高的熱硬化特性,讓鑽石刀具在較嚴苛的條件下發揮最佳的切削能力,並期望能以Ni3Al取代鈷作為鑽石刀具的主要基材。
實驗結果顯示,鑽石顆粒經擬熱均壓後有重量及強度的損失,並有石墨化之現象發生,而經由銅的添加,便可有效改善上述之情況。
在鋸切帝王黑(supreme black)花崗岩的實驗中,當使用熱韌性較高之鑽石(SDB1100)經擬熱均壓後,無論在乾切或濕切之情況下,切削性能皆比使用熱韌性相對較低之鑽石(SDA85+)為佳。而在本實驗中,以添加10wt%銅之Ni3Al基鑽石刀具,擁有最佳之切削性能,具有取代鈷基鑽石刀具之可行性。
關鍵字:擬熱均壓,反應燒結,Ni3Al,鑽石刀具,切削性能
Abstract
Cobalt has been widely used as the matrix material for diamond tools. It provides good bonding with the diamond grit and erodes at a rate compatible with diamond loss during sawing, cutting ,and machining. However, cobalt is a strategic material and is costly. The purpose of this study was to use boron-doped nickel aluminide(Ni3Al) to replace the costly cobalt as the matrix material for diamond tools. This new matrix was prepared by combining reaction sintering and pseudo-hipping in order to improve the matrix density.
The results showed that both SDB1100 and SDA85+ diamonds lost about 12% in weight during the pseudo-hipping process. The crushing strength also decreased and the Raman spectrum indicated that the diamond surface had been graphitized.
The grinding ratio is one of the indices used to evaluate the sawblade''s wear performance. In this study, the grinding ratio of a diamond tool of Ni3Al+10wt%Cu was the highest in both wet and dry cut conditions and is a potential matrix material instead of cobalt for diamond tools.
Keywords : pseudo-hipping, reaction sintering, nickel aluminide,
diamond tool, wear performance
第一章 文獻回顧
第二章 實驗
第三章 結果
第四章 討論
第五章 結論
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