| 摘要: |
| 利用自行研制的搅拌摩擦焊机采用一种搅拌摩擦焊外侧角接的新方法对厚度为22 mm的2519铝合金进行了角接焊接试验,并对焊缝的微观组织、硬度等进行了分析.分析了搅拌针断裂原因及得出其断裂方式为剪切断裂.结果表明,搅拌摩擦焊外侧角接焊接的方法能够有效地进行角接焊接;合理的焊接工艺和搅拌针形状是焊接的关键;旋转频率在30~40 rad/s,焊接速度在90~120 mm/min的范围内都可以获得良好的接头外观. |
| 关键词: 搅拌摩擦焊 外侧角接 2519铝合金 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(500675228) |
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| Friction stir fillet welding of 2519 aluminum alloys |
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MA Huikun, HE Diqiu, LIU Jinshu
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College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
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| Abstract: |
| Using a new method of fillet welding, the friction stir outer fillet welding, we welded the 2519 high-strength aluminum alloy plate 22 mm thick, and analyzed the microstructure and microhardness distribution of fillet welding joint and the reason of the fracture of welding stirring pin, which the type of fracture is shear fracture. The results show that the welding method can effectively carry on fillet welding; the reasonable welding process and welding stirring pin shape are the key of high-quality fillet welding joint. When the rotation speed is 30-40 rad/s and the welding speed is 90-120 mm/min, we can get a high-quality weld appearances. |
| Key words: friction stir welding outer fillet welding 2519 aluminum alloys |
