( 南昌航空工業(yè)學(xué)院 材料科學(xué)與工程系， 南昌 330034)
摘 要: 利用攪拌摩擦焊技術(shù)成功地焊接了防銹鋁LF6和工業(yè)純銅T1對接接頭， 研究了工藝參數(shù)對接頭組織與性能的影響。結(jié)果表明： 攪拌頭旋轉(zhuǎn)速度與焊接速度的比值大小是保證接頭致密性和決定組織、 性能的關(guān)鍵因素, 合適的焊接工藝參數(shù)可以獲得組織、 性能優(yōu)良的Al/Cu接頭。 板材厚度較小時， 形成良好焊縫的規(guī)范參數(shù)范圍較寬，焊接過程中接頭內(nèi)部發(fā)生了劇烈的塑性流動。 由于摩擦熱與變形能的共同作用, 在焊縫內(nèi)部形成了Al3.892Cu6.108型金屬間化合物, 使焊縫局部區(qū)域硬度升高。
關(guān)鍵字: Al/Cu焊接；攪拌摩擦焊； 焊接過程
（ Department of Materials Science and Engineering,
Nanchang Institute of Aeronautical Technology, Nanchang 330034, China）
Abstract: The butt joint of dissimilar metals, aluminum alloy LF6 and copper T1, was welded with friction stir welding method. The influence of welding parameters on the microstructure and properties of the joint was investigated. The results show that the ratio of the rotation speed of the welding tool to the welding speed, i.e. ω/v, is the main factor to control the soundness, microstructures and properties of the weld. Suitable welding parameters can obtain the Al/Cu welding joint with good weld microstructures and properties. If the sheet is relatively thin, the range of welding parameters obtained that can get better weld quality is wider. Heavily plastic flow of the weld metal occurs inside the weld during the process. And a kind of intermetallic compound, Al3.892Cu6.108, is formed within the weld because of the cooperation effect of the friction heat and plastic deformation energy of the metals, and this compound increases the hardness of the local area in the weld.
Key words: Al/Cu welding; friction stir welding; welding process
