中国激光, 2018, 45 (3): 0302002, 网络出版: 2018-03-20   

填充焊丝对A7204铝合金光纤激光-VPTIG复合焊接头的影响 下载: 692次

Effects of Filler Wires on A7204 Aluminum Alloy Joint by Fiber Laser-VPTIG Hybrid Welding
作者单位
北京工业大学激光工程研究院, 北京 100124
摘要
基于光纤激光-变极性钨极稀有气体保护电弧焊(VPTIG)复合焊技术,利用不同填充焊丝对A7204铝合金进行了焊接,分析了复合焊接接头的显微组织与力学性能,并研究了接头的软化行为及机制。结果表明,ER5087填充焊丝条件下的焊缝上部铸态组织最细小;自然时效90天后,三种填充焊丝条件下的接头力学性能相近,拉伸试样基本断裂于近母材侧的热影响区;三种填充焊丝条件的焊接接头在距熔合线1.6~2 mm处的热影响区硬度最高,而在距焊缝中心3~7 mm处的热影响区有明显的软化带;焊接热影响区存在明显的时效硬化区和再结晶软化区,且自然时效对热影响区软化具有明显影响。
Abstract
By using the hybrid welding technology of fiber-laser and VPTIG (variable-polarity tungsten inert gas arc welding), the A7204 aluminum alloys are welded with different filler wires. The microstructures and mechanical properties of these joints by this hybrid welding are analyzed, and the softening behavior and mechanism of these joints are also investigated. The results show that the upper part of the weld with ER5087 filler wires presents the finest microstructure with narrow dendrite arms. After the natural aging of 90 days, the mechanical properties of joints welded with three kinds of filler wires are similar, and the tensile specimens fracture basically in the heat-affected zone which is close to the base metal. The microhardness of these joints welded with three kinds of filler wires in the heat-affected zone, 1.6-2 mm away from the fusion line, is the highest, in contrast, the softening zone obviously occurs in the heat-affected zone, 3-7 mm away from the weld center. In the heat-affected zone, there exist the obvious aging hardening zone and recrystallization softening zone, and the natural aging has an obvious effect on the softening of heat-affected zone.

王灿, 吕俊霞, 张建超, 吴世凯. 填充焊丝对A7204铝合金光纤激光-VPTIG复合焊接头的影响[J]. 中国激光, 2018, 45(3): 0302002. Wang Can, Lü Junxia, Zhang Jianchao, Wu Shikai. Effects of Filler Wires on A7204 Aluminum Alloy Joint by Fiber Laser-VPTIG Hybrid Welding[J]. Chinese Journal of Lasers, 2018, 45(3): 0302002.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!