| 锌夹层对铝合金超声搅拌摩擦点焊Hook缺陷的影响 |
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| 引用本文： | 马琳,李鸣申,温琦,姬书得,周长壮.锌夹层对铝合金超声搅拌摩擦点焊Hook缺陷的影响[J].焊接学报,2019,40(4):125-132. |
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| 作者姓名： | 马琳 李鸣申 温琦 姬书得 周长壮 |
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| 作者单位： | 沈阳航空航天大学 材料科学与工程学院,沈阳,110036;沈阳航空航天大学 航空宇航学院,沈阳,110036 |
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| 基金项目： | 国家自然科学基金青年基金资助项目(51705338)；航空科学基金资助项目(2016ZE54024)；辽宁省教育厅科学技术研究项目(L201731)；辽宁省自然基金面上项目(20180550471) |
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| 摘 要： | 对于铝合金的搅拌摩擦点焊，Hook缺陷是制约接头焊接质量的原因之一. 文中提出一种添加锌夹层的超声搅拌摩擦点焊新工艺，在利用超声可提高材料流动性及促进元素扩散的同时，添加纯锌中间层，使界面形成低熔点共晶进一步促进Hook区材料的冶金结合，从而改善Hook形貌，提升接头焊接质量. 结果表明，添加锌夹层可明显改善接头Hook形貌，显著提高了Hook区有效连接面积. 在不同热输入条件下，添加锌夹层后超声搅拌摩擦点焊接头的拉剪强度均有所提高. 当转速为600和1 200 r/min时，添加锌夹层比常规超声搅拌摩擦点焊工艺得到的接头拉剪失效载荷分别提升了21.36%和12.79%.
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| 关 键 词： | 铝合金 超声搅拌摩擦点焊 Hook缺陷 锌中间层 |
| 收稿时间： | 2018/10/29 0:00:00 |
Effect of zinc interlayer on Hook defects of aluminum alloy ultrasonic assisted friction stir spot welding joint |
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| MA Lin,LI Mingshen,WHEN Qi,JI Shude,ZHOU Changzhuang.Effect of zinc interlayer on Hook defects of aluminum alloy ultrasonic assisted friction stir spot welding joint[J].Transactions of The China Welding Institution,2019,40(4):125-132. |
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| Authors: | MA Lin LI Mingshen WHEN Qi JI Shude ZHOU Changzhuang |
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| Affiliation: | 1. School of Material Science and Engineering, Shenyang Aerospace University, Shenyang 110036, China;2. School of Aerospace and Engineering, Shenyang Aerospace University, Shenyang 110036, China |
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| Abstract: | Hook defect is one of the factors that restrict the quality of aluminum alloy friction stir spot welding (FSSW) joints. In this paper, a new process of ultrasonic friction stir spot welding (UAFSSW) with zinc interlayer was proposed. Ultrasonic vibration improved the fluidity of the material and promoted the elements diffusion. Meanwhile, by adding pure zinc interlayer, the rapid metallurgical bonding of Hook zone materials can be realized, therefore, the quality of UAFSSW joint can be improved. As the results shown, compared with conventional UAFSSW method, adding zinc interlayer had obvious positive effects on Hook forming of joint. Under different heat input conditions, tensile-shear strengths of UAFSSW joints increased by adding zinc interlayer. The tensile-shear failure load of the joint obtained by adding zinc interlayer method improves 21.36% and 12.79% than conventional UAFSSW process when the rotational speed is 600 and 1 200 r/min, respectively. |
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| Keywords: | aluminum alloy|ultrasonic friction stir spot welding|Hook defect|zinc interlayer |
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