| 基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷 |
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| 引用本文： | 孟立春,孙晓红,刘雪松.基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷[J].焊接学报,2018,39(3):67-70. |
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| 作者姓名： | 孟立春 孙晓红 刘雪松 |
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| 作者单位： | 中车青岛四方机车车辆股份有限公司;哈尔滨工业大学先进焊接与连接国家重点实验室 |
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| 摘 要： | 以2024-T4铝合金为对象进行了搅拌摩擦扩散焊试验，首次提出并使用涡状搅拌针，且对比分析了涡状搅拌针数量对横截面形貌、材料流动行为与力学性能的影响. 结果表明,涡状搅拌针作用下的搭接界面未出现明显的弯曲现象，增加涡状针的数量有利于增加焊核区底部的宽度. 当采用4个涡状结构的搅拌针时，发生拉伸断裂模式的搭接接头有效连接宽度与断裂载荷均大于具有6个涡状结构的搅拌针，其值分别为11.74 mm及17 531.83 N.
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| 关 键 词： | 搅拌摩擦扩散焊 涡状搅拌针 横截面形貌 断裂载荷 |
| 收稿时间： | 2017/9/25 0:00:00 |
Formation and mechanical properties of friction stir diffusion bonding joints with 2024-T4 aluminum alloy by convex-vortex pins |
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| MENG Lichun,SUN Xiaohong,LIU Xuesong.Formation and mechanical properties of friction stir diffusion bonding joints with 2024-T4 aluminum alloy by convex-vortex pins[J].Transactions of The China Welding Institution,2018,39(3):67-70. |
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| Authors: | MENG Lichun SUN Xiaohong LIU Xuesong |
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| Abstract: | Convex-vortex pin was firstly proposed and adopted to join the 2024-T4 aluminum alloy by friction stir diffusion welding. The effect of different stir pins on the cross-section appearance, material flow behavior and mechanical properties was investigated. The results showed that no obvious bending generated in the lap interface under the influence of convex-vortex pins. With the increment of the convex-vortex pins, the width of bottom of nugget zone also increased. The lap joint obtained by four convex-vortex pins presented a higher effective lap width and fracture loads than that of the lap joint obtained by six convex-vortex pins. And the corresponding values were 11.74 mm and 17 531.83 N, respectively. |
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