Microstructure and Mechanical Prorerties of Friction Stir Welding Joints of 5083 Aluminium Alloy
摘 要
对8 mm厚5083-H321铝合金板进行了搅拌摩擦焊接试验, 研究了焊接工艺参数对搅拌摩擦焊接头显微组织和力学性能的影响。结果表明: 该搅拌摩擦焊接头焊核区显微组织为细小的等轴晶组织, 热机影响区为拉伸弯曲变形组织, 热影响区非常窄, 其晶粒尺寸与母材相当; 综合接头表面形貌和拉伸性能得到较佳的搅拌摩擦焊接工艺参数为使用搅拌针为三棱形带螺纹、轴肩为内扣型的搅拌头,主轴转速为300 r·min-1,焊接速率为120 mm·min-1; 在该工艺条件下接头表面成形良好, 抗拉强度可达到母材的94.5%。
Abstract
5083-H321 aluminium alloy plate with thickness of 8 mm were successfully welded by friction stir welding (FSW) method, and the effect of welding parameters on microstructure and mechanical properties of FSW joints were studied. The results show that microstructure of the nugget zone was fine equiaxial grain, microstructure of thermo mechanically affected zone (TMAZ) was stretch bending deformation structure, and the heat affected zone was very narrow and the grain size was similar to the base metal. The optimal FSW parameters according to the surface morphology and the tensile test results was using three prismatic threaded stir pin and inner button type shoulder, and with the rotating speed of 300 r·min-1 and welding speed of 120 mm·min-1. Under these conditions, the FSW joint surface was good, and the tensile strength could reach 94.5% of that of the base metal.
中图分类号 TG453.9
所属栏目 试验与研究
基金项目
收稿日期 2012/11/12
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备注田莉莉(1981-),女,工程师,硕士。
引用该论文: TIAN Li-li,CHANG Xue-bin,ZHOU Ying-jie,YU Zheng-yang. Microstructure and Mechanical Prorerties of Friction Stir Welding Joints of 5083 Aluminium Alloy[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2013, 49(4): 225~228
田莉莉,常学斌,周英杰,于正洋. 5083铝合金搅拌摩擦焊接头的显微组织与力学性能[J]. 理化检验-物理分册, 2013, 49(4): 225~228
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参考文献
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【5】朱亮,龙林,乔及森. 时效对6063铝合金焊接接头性能的影响[J]. 焊接,2006(5): 26-30.
【2】RHODES C G,MAHONEY M W,BINGEL W H,et al. Effect of friction stir welding on microstructure of 7075 aluminum[J]. Scripta Materialia,1997,36(1): 69-75.
【3】王文峰, 童彦刚, 王纯祥. 一种新型焊接工艺——搅拌摩擦焊[J]. 电焊机, 2004(1): 15-18.
【4】常学斌, 葛继平, 刘书华,等. 异种铝合金搅拌摩擦焊接接头的微观组织与力学性能[J]. 理化检验-物理分册, 2008,44(6): 281-295.
【5】朱亮,龙林,乔及森. 时效对6063铝合金焊接接头性能的影响[J]. 焊接,2006(5): 26-30.
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