超硬合金含有硬質碳化物提供硬度，以及較韌的金屬黏結相以提供韌性，具有室溫高硬度，且耐高溫軟化。因此超硬合金在切削、鑽孔、模具等工具上被廣泛應用。
本研究為降低WC/Co成本及改善性質，以Al-Co-Cr-Cu-Fe-Ni取代Co，並使用雙盤研磨法進行粉末製備及液相燒結，製作WC/Al-Co-Cr-Cu-Fe-Ni超硬合金。本研究針對粉末的大量製造進行參數改良，結果發現減少單次粉末添加量、增加轉速及配合攪拌之情形下，可於增加粉末流出能力且同時維持一定的細化效果。將煤油溶劑改以黏度及表面張力皆較低的酒精做取代，可進一步增加粉末回收率達95%。將所得粉末進行傳統燒結，使用以煤油為溶劑配合磁鐵輔助攪拌研磨之粉末進行燒結，所得塊材硬度可達HV30 1385，使用以酒精為溶劑研磨經Fe變量之粉末進行燒結，所得塊材硬度可達HV30 1263，兩者韌性皆可達KIC 16.2，其韌性─硬度組合皆高於文獻中WC/Co超硬合金之KIC-Hv帶狀分布曲線之上限，顯示高熵合金黏結相配合雙盤研磨法可得低成本性質優越的超硬合金。

目　錄
Abstract I
摘　要 III
誌　謝 IV
目　錄 VI
圖目錄 X
表目錄 XV
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 超硬合金之發展歷史 7
2.1.3 超硬合金的未來發展趨勢 11
2.2 影響超硬合金機械性質的因素 15
2.3 粉末製造方式 23
2.3.1 高能球磨法 23
2.3.2 噴霧粉體製程 27
2.3.3 化學氣相反應合成法 30
2.4 燒結機制 31
2.4.1 固相燒結 31
2.4.2 液相燒結 34
2.5 高熵合金 41
2.5.1 高熵合金開發背景 41
2.5.2 高熵合金的特點 43
2.6 本論文研究目的 46
參、 實驗方式 47
3.1 實驗設計及流程 47
3.2 雙盤研磨機之機台設計 51
3.3 粉末冶金製程 55
3.3.1 混和粉末之研磨、乾燥 55
3.3.2 過篩、生胚成型 55
3.3.3 脫脂、燒結 57
3.4 性質量測及其他分析 59
3.4.1 X-ray 繞射分析 59
3.4.2 SEM 微結構觀察及 EDS 分析 59
3.4.3 燒結試片密度量測 59
3.4.4 燒結試片硬度及韌性量測 60
3.4.5 粉末與燒結試片之粒徑分析 63
3.4.6 粉末氮氧分析 63
肆、 結果與討論 64
4.1 以煤油為溶劑之單次添加製備超硬合金粉末 64
4.1.1 不同漿料上方壓力對研磨效果的影響 64
4.1.2 不同粉末添加量對研磨效果的影響 71
4.1.3 不同轉速對研磨效果的影響 74
4.2 以煤油為溶劑之多次添加製備超硬合金粉末 81
4.2.1 不同轉速對多次添加研磨效果的影響 81
4.2.2 不同磁鐵大小輔助對多次添加研磨效果的影響 86
4.2.3 添加次數對多次添加研磨效果的影響 92
4.3 以煤油為溶劑之超硬合金塊材製備 96
4.4 以酒精為溶劑之多次添加製備超硬合金粉末 104
4.4.1 以酒精為溶劑對研磨效果的影響 104
4.4.2 改良研磨參數對研磨效果的影響 110
4.5 以酒精為溶劑之超硬合金塊材製備 118
4.5.1 不同粉末狀態的影響 118
4.5.2 不同Fe含量的影響 127
4.5.3 不同燒結氣氛的影響 136
4.6 與文獻中WC超硬合金之比較 143
伍、 結　論 146
陸、 參考文獻 148

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