摩擦攪拌銲接攪拌桿探針幾何設計最佳化研究 林吉廷、胡瑞峰
E-mail: [email protected]
摘 要
摩擦攪拌銲接之攪拌桿探針與銲接參數選擇易產生問題， 導致攪拌桿壽命及摩擦攪拌銲接銲塊品質優劣受到影響，所以 本研究擬研究摩擦攪拌銲接攪拌桿探針設計最佳化。實驗材料 以AZ61鎂合金和AZ80鎂合金為主，探討攪拌桿探針設計和 材質 對摩擦攪拌銲接之影響。以攪拌桿探針的外觀和重量之變化、 黏著及去除材料之難易以及磨耗，尋求最佳攪拌桿探 針設計和 壽命。實驗的攪拌桿參數有圓柱形狀、錐度形狀、螺紋形狀、 不同材質，加上摩擦攪拌銲接參數的旋轉速度、
進給率、攪拌 桿傾斜角度等對攪拌桿壽命之影響，並比較不同鎂合金對攪拌 桿壽命之影響。 摩擦攪拌銲接與傳統銲接比 較，雖其銲接後之銲件機械性 質有明顯提昇，但仍有缺陷產生，幾乎是來自於銲塊組織中的 孔洞及銲後效果，而攪拌後 黏著材料即材料損失，代表試片重 量相對的損失，本研究發現經摩擦攪拌銲接之材料損失與銲塊 缺陷和機械性質非常密 切關連，而材料損失來自於攪拌桿探針 上黏著材料、試片毛邊溢出料，和摩擦攪拌銲接過程產生的微 屑，在整個研究中
，發現攪拌桿探針最好的設計為螺紋探針。
關鍵詞 : 摩擦攪拌銲接，攪拌桿，鎂合金
目錄
封面內頁 簽名頁 授權書 ... iii 中文摘要 ... iv 英文摘要 ... v 誌謝 ... vi 目錄 ... vii 圖目錄 ... ix 表目錄
... xv 符號說明 ... xvi 第一章 前言 ... 1 第二章 文獻探討 ... 2 2.1 摩擦攪拌銲接 ... 2 2.2 FSW銲道及組織 ... 3 2.3 不同被銲母材的摩 擦攪拌銲接 ... 5 2.4 不同材料的攪拌桿 ... 7 2.5 攪拌桿設計 ... 8 2.6 不同攪拌桿對銲 接的影響 ... 9 2.6.1 探針形狀對磨耗影響 ... 9 2.6.2 探針形狀對銲道影響 ... 9 2.6.3 銲接參數 對攪拌桿探針磨耗的影響 ... 12 2.6.4 銲接參數對銲塊結構的影響 ... 13 2.7 攪拌桿探針磨耗量測 ... 16 第三章 實驗方法及步驟 ... 38 3.1 材料準備 ... 38 3.2 攪拌桿設計與製造 ... 38 3.3 摩擦攪拌銲接設備 ... 39 3.4 實驗流程 ... 39 3.5 攪拌桿量測 ... 40 3.6 微結 構觀察 ... 45 3.7 材料回填孔洞實驗 ... 45 第四章 結果與討論 ... 57 4.1 攪拌桿 探針外觀觀察 ... 57 4.2 試片之重量分析 ... 58 4.3 攪拌桿探針之外觀與重量分析 ... 59 4.4 機械性質與重量分析 ... 60 4.5 攪拌桿探針黏著量分析 ... 62 4.6 攪拌桿探針磨耗分析 ...
65 第五章 結論 ... 112 參考文獻 ... 114 參考文獻
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