铝合金搅拌摩擦焊-交叉点焊工艺

基金项目: 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

A cross-friction stir spot welding process of aluminum alloy

1.
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Technology Research Institute of Nanjing Chenguang Group Co., Ltd(NCGC), China Aerospace Science and Industry Corporation(CASTC), Nanjing 210006, China

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.
- 交叉点焊 /
- 搅拌摩擦焊 /
- 铝合金 /
- 力学性能
Abstract: 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.
- cross-friction stir spot welding /
- friction stir welding /
- aluminum alloy /
- mechanical properties