| 5A90铝锂合金T形接头激光填丝焊接头组织性能分析 |
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| 引用本文： | 何恩光,巩水利,杨涛,陈俐.5A90铝锂合金T形接头激光填丝焊接头组织性能分析[J].焊接学报,2013(9):99-102. |
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| 作者姓名： | 何恩光 巩水利 杨涛 陈俐 |
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| 作者单位： | 北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024,北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024,武汉理工大学材料科学与工程学院, 武汉 430070,北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024 |
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| 摘 要： | 对2.5 mm厚5A90铝锂合金T形接头激光焊和激光填丝焊接头组织与性能进行了研究.结果表明,与不填丝相比,焊接过程中填充焊丝有效减少角焊缝咬边、下塌等缺陷,明显改善焊缝表面成形,同时增大了接头熔化区面积,提高了激光的吸收率;填丝还使得T形接头两侧角焊缝组织大小趋于相同,但组织相对粗大;接头抗拉强度接近提高20%,拉伸断口呈韧性断裂.
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| 关 键 词： | T形接头 激光焊 激光填丝焊 5A90铝锂合金 拉伸性能 |
| 收稿时间： | 2012/12/3 0:00:00 |
Microstructure and properties of 5A90 Al-Li alloy T-joints by laser welding with filler wire |
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| HE Enguang,GONG Shuili,YANG Tao and CHEN Li.Microstructure and properties of 5A90 Al-Li alloy T-joints by laser welding with filler wire[J].Transactions of The China Welding Institution,2013(9):99-102. |
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| Authors: | HE Enguang GONG Shuili YANG Tao and CHEN Li |
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| Affiliation: | Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China,Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China,School of Material Science and Engineering, Wuhan University of Science and Technology, Wuhan 430070, China and Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China |
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| Abstract: | The microstructure and mechanical properties of 5A90 Al-Li alloy T-joints by laser welding with and without filler wire were investigated.The results show that laser welding with filler wire could reduce the undercut and collapse defects, and improve the weld surface forming.Meanwhile,laser welding with filler wire could also increase the area of fusion zone and enhance the laser absorption rate.Laser welding with filler wire could homogenize the weld microstructure on both sides of the Tjoint, although the grains were coarsened.However,the tensile strength of the joint increased by nearly 20% and the fractured surface revealed ductile features. |
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| Keywords: | T-joint laser welding laser welding with filler wire 5A90 Al-Li alloy tensile property |
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