| 高强铝合金的MIG以及激光MIG焊接工艺对比 |
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| 引用本文： | 许良红,田志凌,彭云,张晓牧. 高强铝合金的MIG以及激光MIG焊接工艺对比[J]. 焊接学报, 2007, 28(2): 38-42 |
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| 作者姓名： | 许良红 田志凌 彭云 张晓牧 |
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| 作者单位： | 钢铁研究总院,先进钢铁流程及材料国家重点实验室,北京,100081;钢铁研究总院,先进钢铁流程及材料国家重点实验室,北京,100081;钢铁研究总院,先进钢铁流程及材料国家重点实验室,北京,100081;钢铁研究总院,先进钢铁流程及材料国家重点实验室,北京,100081 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 以20 mm厚的2519-T87高强铝合金为研究对象,研究了熔化极惰性气体保护焊 (MIG焊)和CO2激光-MIG复合焊的焊接效率、组织以及力学性能之间的区别.结果表明,激光-MIG复合焊的焊接效率是MIG焊的5倍,焊接熔深更大,接头的抗拉强度也提高到母材的70%以上,而MIG焊接头抗拉强度仅仅只有母材的60%左右.由于复合焊的热输入比较小,而且熔池的熔融金属的流动情况以及温度梯度与MIG焊有很大的不同,复合焊的焊缝组织比MIG焊的更加细小,接头处的也没有发现MIG焊接头中出现的等轴晶区.
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| 关 键 词： | 激光-熔化极惰性气体保护复合焊 熔化极惰性气体保护焊 力学性能 显微组织 |
| 文章编号： | 0253-360X（2007）02-038-05 |
| 收稿时间： | 2005-10-20 |
| 修稿时间： | 2005-10-20 |
Comparison of MIG welding and laser -MIG welding of high strength aluminum alloy |
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| XU Lianghong,TIAN Zhiling,PENG Yun and ZHANG Xiaomu. Comparison of MIG welding and laser -MIG welding of high strength aluminum alloy[J]. Transactions of The China Welding Institution, 2007, 28(2): 38-42 |
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| Authors: | XU Lianghong TIAN Zhiling PENG Yun ZHANG Xiaomu |
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| Affiliation: | State Key Laboratory of Advanced Steel Processes and Products, Centeral Iron & Steel Research Institute, Beijing 100081, China,State Key Laboratory of Advanced Steel Processes and Products, Centeral Iron & Steel Research Institute, Beijing 100081, China,State Key Laboratory of Advanced Steel Processes and Products, Centeral Iron & Steel Research Institute, Beijing 100081, China and State Key Laboratory of Advanced Steel Processes and Products, Centeral Iron & Steel Research Institute, Beijing 100081, China |
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| Abstract: | The 20 mm thick 2519-T87 high strength aluminum plates were welded by MIG welding and CO2 laser-MIG hybrid welding process.And the welding efficiency,microstructure and mechanical properties of welded joint were compared.Results indicarte that the efficiency of laser-MIG hybrid welding is 5 times of that of MIG welding,and the tensile strength of the joints has been improved,reaching 70% of the tensile strength of base material,while the tensile strength of MIG welded joints is only 60% of that of the base material.Because of the low heat input of laster-MIG hybrid welding,the condition of the fluid flow and temperature gradient are different from that of MIG welding,resulting in the finer microstructure in weld center,and the equiaxed zone near the bond line which often occurs in MIG welding disappears. |
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| Keywords: | laser-metal inert-gas hybrid welding metal inert-gas welding mechanical properties microstructure |
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