(南昌航空工業(yè)學(xué)院 材料科學(xué)與工程系，南昌 330034)
摘 要: 針對(duì)防銹鋁LF6研究了攪拌摩擦焊焊接規(guī)范對(duì)焊縫成型及接頭力學(xué)性能的影響， 分析了攪拌摩擦焊缺陷產(chǎn)生的原因。 結(jié)果表明， LF6（M）攪拌摩擦焊接頭強(qiáng)度可以達(dá)到母材的強(qiáng)度， 其背彎和正彎角度可達(dá)到180°； 焊接規(guī)范對(duì)接頭的力學(xué)性能有影響， 存在一個(gè)最佳力學(xué)性能規(guī)范區(qū)； 某些規(guī)范條件下可能出現(xiàn)單邊溝槽或隧道型缺陷， 它們的位置與攪拌頭的旋轉(zhuǎn)方向有關(guān)。
關(guān)鍵字: 防銹鋁； 固態(tài)塑性連接； 攪拌摩擦焊
（Department of Materials Science and Engineering,
Nanchang Institute of Aero Technology,Nanchang 330034, China）
Abstract:Friction stir welding(FSW) is a rather new solid-state joining process, usually for joining low melting temperature alloy. The typical LF6 aluminum alloy was joined by using FSW process. The influences of welding conditions on the weld appearance and mechanical properties were investigated. The reasons of forming defect in FSW were analyzed. It is shown that the strength of the joint can reach that of the parent materials, the bending angle can reach 180°. The mechanical properties of the joint are related to the welding variables, and there is a region in which the mechanical properties are higher than 90% of the parent materials. In some welding conditions, some special appearance, such as groove on one side of the weld surface or channel in the weld, may occur, whose position is related to the rotation direction of the pin.
Key words: aluminum alloy; friction stir welding; solid-state joining
