本研究中，探討了在定負荷13kN、主軸轉速 1200rpm使用組合式銲接工具與無嵌入料工具摩擦攪拌點銲SS400低碳鋼對6061-T6鋁合金的可行性。使用K-type熱電偶量測點銲過程中2 mm厚鋼板與5 mm厚鋁板接合之界面溫度，結果顯示使用組合式銲接工具與無嵌入料銲接工具之接合界面最高溫度皆達到約740°C，但組合式銲接工具溫升速率較無嵌入料銲接工具快。而增加鋁板厚度也會減緩溫升速率。

使用組合式銲接工具來摩擦攪拌點銲2 mm厚鋼板與10 mm厚鋁板，在持壓時間45秒的條件下其銲點的破壞負荷可以達到22kN；但在相同的操作條件下，由無嵌入料銲接工具所產生的熱量不足，使界面無法接合。

In this study, the feasibility for the friction stir spot welding (FSSW) of SS400 low carbon steel to 6061-T6 aluminum alloy was investigated using the assembled-type and plain tools under the constant load of 13kN, the rotation speed of 1200 rpm. The temperatures between the steel sheet of thickness 2 mm and the aluminum alloy of 5 mm were measured during the FSSW process using K-type thermocouples. Results showed that the maximum interface temperature could achieve about 740°C using either the assembled-type or plain tools, but the temperature rise rate of assembled-type tool was higher than that of the plain tool. Furthermore, with increasing the thickness of aluminum alloy sheet, the temperature rise rate also decreased.

The FSSW joint of steel sheet of 2 mm and aluminum alloy sheet of 10 mm could be fabricated by the assembled-type tool with the failure load of 22 kN at a dwell time of 45 s. However, under the same welding parameters, the heat generated by the plain tool is not enough to weld two sheets together.

學位論文審定書 i
誌謝 ii
摘要(中文) iii
摘要(英文) iv
總目錄 v
圖次 vii
表次 ix



第一章 緒論 1
1.1 前言 1
1.2 摩擦攪拌銲接簡介 2
1.3 文獻回顧 4
1.3.1 摩擦攪拌搭接 4
1.3.2 銲接缺陷 4
1.3.3 銲接工具幾何 6
1.3.4 鋁、鋼摩擦攪拌銲接 11
1.4 研究目的 13
1.5 論文架構 15
第二章 實驗設備與方法 16
2.1 實驗設備 16
2.1.1 定負荷摩擦攪拌銲接平台 17
2.2 組合式摩擦攪拌銲接工具 20
2.2.1 組合式摩擦攪拌銲接工具之材質與外形 20
2.2.2 嵌入料材質選用 21
2.3 實驗材料之選用 21
2.3.2 量測接合界面溫度試片之準備 24
2.4 溫度量測設備 25
2.5 底部絕熱材料之選用 25
2.6 實驗方法 26
2.6.1 試片前處理 26
2.6.4 實驗步驟 29
2.7 拉伸試驗試片之準備 31
2.8 金相顯微觀察試片之取樣 33
2.9 接合面積之量測 34
2.10 實驗流程 35
第三章 結果與討論 36
3.1 鋁板厚度對鋼鋁界面溫度量測結果之影響 36
3.2 嵌入料銲接工具與無嵌入料銲接工具溫度比較 39
3.3 銲點外觀觀察 40
3.4 拉伸試驗之破壞強度 42
3.5 破斷面之接合面積與接合強度 44
3.6 破斷面觀察 46
3.7 銲點剖面觀察 49
3.7.1 剖面外觀與金相 49
3.7.2 低碳鋼板變形深度 53
3.7.3 搭接界面檢視 55
第四章 結論與未來展望 57
4.1 結論 57
4.2 未來展望 58
參考文獻 59

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