摘要
搅拌摩擦焊是一种用于低熔点合金板材的新型固态连接技术。本文针对我国常用的LF6铝合金 ,研究了搅拌摩擦焊焊接规范对焊缝成型及接头力学性能的影响 ,分析了搅拌摩擦焊缺陷产生的原因。结果表明 ,LF6 (M )搅拌摩擦焊接头强度可以达到母材的强度 ,其背弯和正弯角度可达到 180度 ;焊接规范对接头的力学性能有影响 ,存在一个最佳力学性能规范区 ;某些规范条件下可能出现单边沟槽或隧道型缺陷及单边塑性流线现象 ,它们的位置与搅拌头的旋转方向有关。
Friction stir welding(FSW)is a rather new solid state joining process,usually for joining low melting temperature alloy.In this paper,the typical LF6 aluminum alloy was joined by using FSW process.The influence of the welding conditions on the weld appearance and mechanical properties were investigated.The reasons of forming defect in FSW have been analyzed.It is shown that the strength of the joint may be equal to 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 properties is 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 or plasticised flow stream,may occur,the position is related with the rotation direction of the pin.
出处
《南昌航空工业学院学报》
CAS
2001年第2期1-4,共4页
Journal of Nanchang Institute of Aeronautical Technology（Natural Science Edition）
基金
江西省自然科学基金 (995 0 0 10 )
