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| 5A06与7A52-T6铝合金摩擦螺柱焊组织与力学性能研究 |
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梁明阳1, 彭小洋1, 韩世伟1, 马潇天2,3, 谢聿铭2,3, 黄永宪2,3, 孟祥晨2,3
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1.重庆铁马工业集团有限公司，重庆 400050;2.先进焊接与连接国家重点实验室，哈尔滨工业大学，
哈尔滨 150001;3.郑州研究院，哈尔滨工业大学，郑州 450046
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| 摘要: |
| 针对高强铝合金螺柱与基板熔化焊接存在的锌元素烧损、气孔/裂纹倾向性高、界面氧化膜难去除等问题，本研究提出了轴肩辅助式摩擦螺柱焊方法，成功实现了5A06铝合金螺柱与7A52-T6铝合金基板的优质焊接。结果表明，辅助轴肩可同时实现“控形”和“控性”的作用，焊缝表面成形光滑，无飞边缺陷。内部界面结合良好，无弱连接等缺陷。在优化的焊接参数下，摩擦螺柱焊剪切强度达245MPa。 |
| 关键词: 异种铝合金 摩擦螺柱焊 微观组织 力学性能 |
| 基金项目:国家自然科学基金项目（521**301、522**350） |
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| Microstructures and Mechanical Properties of Friction Stud Welding between 5A06 and 7A52-T6 Aluminum Alloys |
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Liang Mingyang1, Peng Xiaoyang1, Han Shiwei1, Ma Xiaotian2,3, Xie Yuming2,3, Huang Yongxian2,3, Meng Xiangchen2,3
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1. Chongqing Tiema Industries Group Co., Ltd., Chongqing 400050;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;3. Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046
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| Abstract: |
| Aiming at the issues of zinc burning-loss, high porosity and crack tendency, and difficulty on removal of the interfacial oxide films associated with fusion welding of high-strength aluminum alloy studs and substrates, sleeve-assisted friction stud welding was proposed, in which the 5A06 studs and 7A52-T6 substrates were successfully welded. The results showed that the sleeve could realize the synchronous controlling of shape and performance. The smooth surface could be obtained and no flash defects were formed on the surface of joint. Meanwhile, the interfacial bonding condition was sound without kissing-bond defect. The shear strength of the friction stud welding joints reached 245MPa. |
| Key words: dissimilar aluminum alloys friction stud welding microstructures mechanical properties |
