摘要
在铝合金传统搅拌摩擦点焊的基础上,以提高点焊接头力学性能为目标,提出"搅拌摩擦焊-交叉点焊"技术.其基本工艺原理是,搅拌头沿交叉轨迹做极短距离的往复式搅拌摩擦焊,以实现高性能的点焊连接.对4mm板厚5A02-H14铝合金进行"搅拌摩擦焊-交叉点焊"试验及分析.结果表明,该工艺可大大拓宽点焊接头的连接面积,并显著降低搭接界面畸变和匙孔处材料缺失的不利影响,与传统搅拌摩擦点焊相比,该工艺能够显著提高铝合金点焊接头的抗剪切性能.
A new technique of cross-friction stir spot welding( cross-FSSW) was proposed for improving the mechanical properties of the spot weld joints. This technology was realized by the tool made the short cross-reciprocating movement. Using this technique,experiments were conducted in 4 mm thick sheets of aluminum alloy 5A02 in H14 condition. The results show that the bonding widths of cross-FSSW joints had been increased,the adverse effects of interface distortion and the lack of material of the keyhole had been avoided. cross-FSSW joints were found to be superior to traditional Friction stir spot welds produced under optimum conditions in lap-shear.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第5期71-74,116,共6页
Transactions of The China Welding Institution
基金
南京航空航天大学博士学位论文创新与创优基金资助项目(BCXJ12-09)
中央高校基本科研业务费专项资金资助项目
关键词
交叉点焊
搅拌摩擦焊
铝合金
力学性能
cross-friction stir spot welding
friction stir welding
aluminum alloy
mechanical properties
