摘要
针对2mm厚的6082-T6铝合金进行无匙孔搅拌摩擦点焊搭接实验,通过正交试验方法得到最优点焊工艺参数;并对焊接接头进行剪切断口扫描分析和显微硬度测试.结果表明:搅拌摩擦点焊的最优工艺参数为搅拌头转速1 400r/min,搅拌针停留时间16s,搅拌头后退时间5s,接头剪切载荷最大值可达7.89kN;焊接接头的搅拌区显微硬度较高,热影响区的显微硬度较低;焊接接头剪切断口的断裂形式为混合断裂.
The experiment on lop jointing of aluminum alloy 6082-T6 plates of 2 mm thickness was carried out with key hole-free friction stir spot welding, the optimal spot welding process paremeters were obtained with orthogonal test, and the shear fracture of the weld was analyzed with scanning device and the microhardness was measured. The result showed that the optimal parameters of welding were as follows： the rotation speed of the stirring head was i 400 r/min, the welding time was 16 s, and the retracting time of stirring head was 5 s. The shear strength of the weld reached 7. 89 kN. Experimental result showed that the microhardness at mixing zone was high, the lower microhardness took place in the heat affected zone. Welded joint fracture mode was of mixed fracture.
出处
《兰州理工大学学报》
CAS
北大核心
2014年第2期23-25,共3页
Journal of Lanzhou University of Technology
基金
国家科技重大专项(2012ZX04008011)
关键词
6082-T6铝合金
搅拌摩擦点焊
正交实验
力学性能
aluminum alloy 6082-T6
stirring friction spot welding
orthogonal experiment
mechanical performance
