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銅/鈦攪拌摩擦搭焊接頭特征及界面結(jié)合機(jī)制
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Interface Characteristic and Connectionism of Friction Stir Welding Lap Joints of Cu/Ti Dissimilar Alloys
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    摘要:

    研究了攪拌摩擦焊法搭接TA2工業(yè)純鈦和T2紫銅。工藝優(yōu)化實(shí)驗(yàn)結(jié)果表明：Cu/Ti搭接攪拌摩擦焊工藝窗口較窄，在攪拌頭轉(zhuǎn)速800 r/min、焊速20 mm/min以及攪拌頭轉(zhuǎn)速900 r/min、焊接速度30 mm/min的焊接工藝參數(shù)配比條件下，可獲得無(wú)缺陷且焊縫表面、搭接界面成形良好的Cu/Ti接頭。對(duì)攪拌頭轉(zhuǎn)速800 r/min、焊速20 mm/min的焊接參數(shù)下獲得的Cu/Ti接頭焊縫進(jìn)行金相和SEM觀察，分析結(jié)果表明：搭接界面兩側(cè)Cu、Ti宏觀流動(dòng)現(xiàn)象明顯，Ti向Cu一側(cè)的塑性材料流動(dòng)量要明顯優(yōu)于Cu向Ti一側(cè)，且在局部機(jī)械混合區(qū)呈典型的Cu/Ti相間條帶狀結(jié)構(gòu)；在搭接界面處形成一層平均厚度約為4.8 μm的擴(kuò)散過(guò)渡層，在過(guò)渡層中Cu的擴(kuò)散速度要大于Ti的擴(kuò)散速度，Cu/Ti搭接界面形成冶金結(jié)合

    Abstract:

    The lap joint of commercial purity titanium (TA2) and copper (T2) plates was made via friction stir welding technique. Based on the optimization experiments, the suitable process parameters have been obtained as follows: rotation speed of 800rpm, travel speed of 20 mm/min and rotation speed of 900 r/min, travel speed of 30 mm/min. Under this process conditions, the defect-free lap welds with well formed surface and the interface of joint can be obtained. Using OM and SEM the investigation on the weld characteristics was conducted. Results show that the phenomenon of the flow in the macro scale of Cu and Ti between the joint-interface is exhibited obviously, and the flow amount of Ti to Cu is more than that of Cu to Ti greatly, furthermore, some parts of joint-interface present the typical bounded texture microstructure of Cu and Ti. About 4.8 μm thickness of diffused intermediate layer is formed in the interface of lap joint, the diffusion velocity of Cu is faster than that of Ti, and the lap joint of Cu and Ti has formed the metallurgical bonding

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姚 磊,沈以赴,李 博,周冠男,吳小偉,胡偉葉.銅/鈦攪拌摩擦搭焊接頭特征及界面結(jié)合機(jī)制[J].稀有金屬材料與工程,2013,42(12):2602~2606.[Yao Lei, Shen Yifu, Li Bo, Zhou Guannan, Wu Xiaowei, Hu Weiye. Interface Characteristic and Connectionism of Friction Stir Welding Lap Joints of Cu/Ti Dissimilar Alloys[J]. Rare Metal Materials and Engineering,2013,42(12):2602~2606.]
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  • 收稿日期:2012-12-04
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