The welding parameters were optimized based on the response surface method in order to improve the mechanical properties of the zero-weld-thinning friction stir welding joints. The response surface model and regression analysis were built. The results showed that zero-weld-thinning friction stir welding was a well-formed welding process. The tensile properties of the joints were obviously influenced by the welding parameters, the rotation speed and welding speed had more significant effect. High rotation speed and moderate welding speed should be selected to get better welding joint without any defects. Under the condition of the rotation speed of 1 000 r/min, the welding speed of 200 mm/min and the shoulder plunge depth of 0.25 mm, the tensile strength of the joints reached to the maximum 363 MPa, which was 94.3 percent of the base metal. The elongation was 11.2%. In comparison to conventional friction stir welding, the mechanical properties of the zero-weld-thinning friction stir welding joint were more homogeneous along thickness direction.
GAO Yihan
,
GUO Xuming
,
MO Chunli
. Parameters optimization and character analysis of the zero-weld-thinning friction stir welding process of aluminum alloy[J]. Transactions of The China Welding Institution, 2019
, 40(4)
: 141
-147
.
DOI: 10.12073/j.hjxb.2019400115
[1] 栾国红, 胡煌辉, 柴鹏. 搅拌摩擦焊——新型列车制造新技术[J]. 电力机车与城轨车辆, 2006(4):40-43 Luan Guohong, Hu Huanghui, Chai Peng. Friction stir welding——in-novative rail vehicle manufacturing process[J]. Electric Locomotives & Mass Transit Vehicles, 2006(4):40-43
[2] 孟立春, 康旭, 孙延军, 等. 7N01铝合金搅拌摩擦焊接头力学性能[J]. 焊接学报, 2012, 33(2):90-92, 100 Meng Lichun, Kang Xu, Sun Yanjun, et al. Mechanical properties of 7N01 aluminum friction stir welding joint[J]. Transactions of the China Welding Institution, 2012, 33(2):90-92, 100
[3] 汪洪峰, 左敦稳, 黎向峰, 等. 能降低焊缝减薄厚度的搅拌摩擦焊用组合式搅拌头:中国, 201010120293. 9[P]. 2010-03-09.
[4] 栾国红, 李光, 董春林, 等. 一种组合式去飞边搅拌摩擦焊搅拌头:中国, 200710302169. 2[P]. 2008-05-14.
[5] 黄永宪, 韩冰, 吕世雄, 等. 能够消除焊缝减薄的带状焊丝随焊送入搅拌摩擦焊方法:中国, 201310127549. 2[P]. 2013-06-19.
[6] Mika D P. Deposition friction stir welding process using filler material and assembly using a die to form a weld profile and prevent flashes:European, 06125031[P]. 2006-11-29.
[7] 任香会, 辜纯民, 超敏, 等. 一种控制搅拌摩擦焊接压痕深度的工艺方法:中国, 201210554070. 2[P]. 2013-04-24.
[8] 张会杰, 王敏, 张骁, 等. 一种实现搅拌摩擦焊焊缝零减薄的焊具及焊接方法:中国, 201410138224. 9[P]. 2015-10-14.
[9] Zhang H, Liu H. Mathematical model and optimization for underwater friction stir welding of a heat-treatable aluminum alloy[J]. Materials & Design, 2013, 45(6):206-211.
[10] Wu C F Jeff, Hamada M. 试验设计与分析及参数优化[M]. 张润楚, 译. 北京:中国统计出版社, 2003.
[11] 徐向宏, 何明珠. 试验设计与Design-Expert、SPSS应用[M]. 北京:科学出版社, 2010.
