本研究使用一新穎的組合式工具對SS 400低碳鋼進行摩擦攪拌點銲，並期望能將其應用在大面板摩擦攪拌銲接。銲接工具材質為碳化鎢，且內嵌一與工件同材質的圓棒。此內嵌料的優勢不僅可提升銲接界面之溫昇速率，還可增加攪拌層厚度。相較於先前的研究，新式組合刀具的製造費用與修整時間有大幅度的改善。銲接設備使用一具有定負荷銲接平台的立式銑床。銲接條件為使用不同的嵌入料直徑，不同的轉速及不同垂直負荷。銲接過程中界面溫度、工具擠入深度及垂直負荷分別由K-type熱電偶、位移計及負荷計進行同步量測。
實驗結果顯示，銲接界面溫度、攪拌層厚度及銲點拉伸強度與嵌入料直徑有正向關係。銲接條件為嵌入料直徑10mm、垂直負荷8kN、刀具轉速1200rpm及銲接時間100秒是應用在大面板的最佳參數。

In this study, a novel assembled-type tool was used to weld SS400 low-carbon steel plate using the friction stir spot welding. The welding tool was made of tungsten carbide embedded a circular rod made of the low-carbon steel. The superiority of this embedded material not only could effectively promote the interface temperature of the joint, but also the thickness of stir zone. Compared to previous studies, this novel tool can significantly improve the manufacturing cost and the trimming time. The welding apparatus composed of a vertical milling machine and a welding platform. The operating conditions of welding were as followings: the diameter of embedded material, the welding speed, and the vertical load. During the welding process, the interface temperature of the joint, the tool plunge depth, and the vertical load were simultaneously measured by the K-type thermocouple, a displacement sensor, and a load cell.
Experimental results revealed that the interface temperature, the thickness of the stir zone, and the tensile strength of the welding joint was proportional to the diameter of the embedded material. The best welding condition is the embedded material diameter of 10mm, the vertical load of 8kN, the welding speed of 1200rpm, and the welding time of 100 seconds.

誌謝 ii
摘要 iii
Abstract iv
目錄 vi
圖次 x
表次 xvi
第一章緒論 1
1.1前言 1
1.2文獻回顧 4
1.2.1 回填式摩擦攪拌點銲(Refill FSSW) ： 9
1.2.2 平坦式摩擦攪拌點銲(Flat FSSW) : 10
1.2.3 Friction bit joining: 11
1.3研究動機 18
1.4文章架構 19
第二章基本理論 20
2.1銲接刀具與試片間的產熱行為 20
2.2搭接試片間的鍵結行為 21
第三章實驗設備、材料及實驗方法 23
3.1實驗設備 23
3.1.1 定負荷銲接平台 24
3.1.2 位移量測設備 25
3.1.3 負荷量測設備 26
3.1.4 溫度量測設備 27
3.2銲接工具之材料與設計 27
3.3銲接試片之選用 28
3.4量測系統 29
3.5實驗墊片之選取 30
3.6實驗流程 31
3.7實驗方法 32
3.7.1實驗參數規劃 32
3.7.2試片前處理 32
3.7.3實驗步驟 33
3.7.4 試片銲接位置 35
3.7.5 K-Type熱電偶之放置 36
3.7.6 金相觀察試片之準備 37
3.7.7 拉伸實驗試片之準備 38
第四章結果與討論 39
4.1不同嵌入料直徑在不同實驗參數下對溫升之影響 39
4.1.1溫升試驗過程中溫度、擠深以及負荷變化 39
4.1.2 嵌入料直徑、負荷以及轉速對於溫升之影響 43
4.1.3 嵌入料直徑對溫升之影響 49
4.1.4 負荷對於溫升之影響 50
4.1.5 刀具轉速對於溫升的影響 52
4.1.6 點銲試驗參數的選定 54
4.2 點銲金相試驗及金相觀察 55
4.2.1 不同實驗參數下的攪拌層厚度 55
4.3 點銲搭接拉伸試驗 60
4.3.1不同轉速對於銲接品質的影響 60
4.3.2不同負荷對於銲接品質的影響 61
4.3.3不同深度對於銲接品質的影響 62
4.3.4 不同實驗參數之拉伸破斷面 63
第五章結論與未來展望 65
5.1 結論 65
5.2 未來展望 66
參考文獻 67

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