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工艺参数对复合搅拌摩擦点焊接头力学性能的影响 被引量:11

Influences of processing parameters on mechanical properties of com-stir friction stir spot welding joints
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摘要 采用LF21铝合金研究了复合搅拌摩擦焊时焊接工艺参数(旋转速度、旋转半径)对焊接接头力学性能的影响。结果表明,当其它焊接参数一定时,焊点的力学性能随着搅拌头旋转速度的增加而增加,当搅拌头的旋转速度增加到1 200 r/min时,焊点的剪切力达到最大值为3.47 kN,随着搅拌头旋转速度的进一步增加,焊点的力学性能开始降低。改变旋转半径,焊点的力学性能随着旋转半径的增加而增加,当旋转半径达到0.5 mm时,焊点的剪切力达到最大值为3.47 kN,然后,随着旋转半径的继续增加,焊点的力学性能开始降低。LF21铝合金的复合搅拌摩擦点焊焊点的微观组织与直插式搅拌摩擦点焊不同的是,在塑性环的边上形成了一个由第二层塑性环形成的"耳朵形"区域。 The objective of this paper was to represent the influences of processing parameters(rotation speed,radius of turn) of com-stir friction stir spot welding on the mechanical properties of welded joints by using LF21 aluminum alloy as base material.According to the results,the mechanical properties of welded joints increase along with the rotation speed of the tool as other welding parameter is constant.Shearing force of welded joints reaches as high as 3.47 kN when the rotation speed of the tool is 1 200 r/m...
出处 《焊接学报》 EI CAS CSCD 北大核心 2008年第6期5-8,113,共5页 Transactions of The China Welding Institution
基金 江苏科技大学先进焊接技术省级重点实验室开放研究基金资项目(JSAWT-06-04)
关键词 复合搅拌摩擦点焊 工艺参数 力学性能 com-stir friction stir spot welding processing parameter mechanical property
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参考文献8

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