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研究生:陳柏勲
研究生(外文):Chen, Bo-Shiun
論文名稱:以雙盤研磨法及液相燒結法開發TiC-WC/(Co-Cr-Mo-Ni) 超硬合金之研究
論文名稱(外文):Development of TiC-WC/(Co-Cr-Mo-Ni) Cemented Carbide by Twin Disk Milling and Liquid Phase Sintering
指導教授:葉均蔚
指導教授(外文):Yeh, Jien-Wei
口試委員:李勝隆洪健龍蔡銘洪
口試委員(外文):Lee, Sheng-LongHong, Jian-LongTsai, Ming-Hung
口試日期:2018-07-17
學位類別:碩士
校院名稱:國立清華大學
系所名稱:材料科學工程學系
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:2018
畢業學年度:106
語文別:中文
論文頁數:166
中文關鍵詞:雙盤研磨粉末冶金液相燒結超硬合金
外文關鍵詞:TwinDiskMillingPowderMetallurgyLiquidPhaseSinteringHardmetals
相關次數:
  • 被引用被引用:0
  • 點閱點閱:112
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
超硬合金結合了陶瓷材料的硬度及金屬材料的韌性,成為綜合性質表現優異的材料,因此在工業界被廣泛的應用。其中又以碳化鎢 (WC) 為主的超硬合金和碳化鈦 (TiC) 為主的瓷金佔大多數。
相較於單元強化相之超硬合金系統,本實驗結合高韌性之碳化鎢(WC) 及高硬度之碳化鈦 (TiC) 系統,以新開發之研磨法初步細化原料粉末後,進行水平球磨及液相燒結,並針對TiC添加量、補碳量、膠結相調整等參數進行研究後,成功開發出兼具硬度及韌性之超硬合金。
本研究表現最優異之成分配比,其硬度-破裂韌性組合可高於文獻中WC/Co超硬合金之 KIC-Hv帶狀分布曲線之上限,顯示其優於傳統液相燒結 WC/Co 超硬瓷金。將本研究所開發出的成分配比進行銑刀測試後,發現其切削性質優於商用銑刀,表示本研究具有刀具的商業應用潛力。
Hardmetals consist of hard phase, which provides hardness and metal, which provides toughness. Because of the excellent mechanical performance of hardmetals, they are widely used in industry. Hardmetals mainly consist of WC-based cemented carbide and TiC-based cermet.
Compared to hard metals with only single hard phase, WC system and TiC system are combined in this research. First of all, we use newly-developed milling to refine the grain size of raw powder material. Then, we use 2D ball milling and liquid phase sintering to seek the best composition. Finally, we successfully developed hardmetals with high hardness and toughness.
The hardness-toughness distribution of the most outstanding composition in this study lies above the hardness-toughness band distribution curve limit of traditional WC/Co hardmetals, which represents its high performance. After performing cutting milling test, we found the cutting milling performance of the samples in this study are better than that of commercial cutters, which means our system owns the commercial potential in cutting tools.
摘要 I
Abstract II
致謝 III
目錄 VII
圖目錄 XII
表目錄 XVIII
壹、前言 1
貳、文獻回顧 3
2.1超硬合金 3
2.1.1超硬合金簡介 3
2.1.2超硬合金發展歷史 7
2.1.3近代超硬合金及未來發展趨勢 11
2.1.4超硬合金應用 14
2.2影響超硬合金機械性質因素 15
2.2.1晶粒尺寸大小 15
2.2.2金屬膠結相含量 16
2.2.3金屬膠結相對碳化物的溶解度及潤濕能力 17
2.2.4多元碳化物的添加 19
2.2.5 WC/WC界面連續性 (Contiguity) 23
2.3粉末製備方式 25
2.3.1粉末製備方式簡介 25
2.3.2高能球磨法 31
2.3.3噴霧轉化法 35
2.4燒結方式及機制 37
2.4.1固相燒結 38
2.4.2液相燒結 41
2.4.3燒結方式簡介 49
2.5高熵合金 54
2.5.1高熵合金發展背景 54
2.5.2高熵合金之特性 56
参、實驗方式 59
3.1成分設計與流程 59
3.2雙盤研磨法製程 61
3.2.1第三代雙盤研磨機台設計與改良 61
3.2.2雙盤研磨機操作流程 64
3.3粉末成型及燒結 66
3.3.1水平球磨 66
3.3.2生胚成型 66
3.3.3燒結製程 67
3.4性質量測與其他分析 70
3.4.1 X-Ray 繞射分析 70
3.4.2微結構與 EDS 成分分析 70
3.4.3密度量測 71
3.4.4硬度與破裂韌性量測 72
3.4.5銑刀切削測試 74
肆、結果與討論 77
4.1 TiC與WC比例變量之結果 77
4.1.1 (TiC)1(WC)9-CCMN 79
4.1.2 (TiC)2(WC)8-CCMN 82
4.1.3 (TiC)3(WC)7-CCMN 85
4.1.4 (TiC)4(WC)6-CCMN 88
4.1.5 (TiC)5(WC)5-CCMN 91
4.1.6機械性質比較 94
4.2少量TiC添加對於機械性質的影響 97
4.2.1 (TiC)0.5(WC)9.5-CCMN 99
4.2.2 3 at.% TiC至7 at.% TiC試片之機械性質比較 102
4.3最高溫持溫時間對於試片之影響 105
4.3.1 (TiC)0.6(WC)9.4-CCMN (2 hrs. sintering) 106
4.3.2 3 at.% TiC至6 at.% TiC試片之機械性質變化 (2hrs. sintering) 108
4.4 Ti元素添加對於試片的影響 110
4.4.1 (TiC)0.5(WC)9.5-CCMNT 111
4.4.2 (TiC)0.5(WC)9.5-CCMNT系列之XRD分析 114
4.4.3 (TiC)0.5(WC)9.5-CCMNT系列之機械性質探討 118
4.5雙盤研磨對於機械性質之影響
4.5.1 (TiC)0.5(WC)9.5-CCMN 123
4.5.2 (TiC)0.6(WC)9.4-CCMN 124
4.5.3 (TiC)0.5(WC)9.5-CCMNT 128
4.6試片之硬度與破裂韌性總整理 130
4.7銑刀切削測試 133
4.7.1一吋試片製備 138
4.7-2切削304不鏽鋼 141
4.7.3切削SKD11冷工具鋼 148
4.7.4綜合比較 155
伍、結論 156
陸、本研究貢獻 158
柒、建議未來研究方向 159
捌、引用文獻 160
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