摘要: |
采用CO2激光-TIG复合焊接对4mm厚2219铝合金开展焊接工艺研究,分析了不同电流对焊缝组织形貌以及接头性能的影响。分析结果表明,由于焊缝晶粒组织形态和尺寸均发生了变化,焊缝的显微硬度要小于母材和热影响区,在2219复合焊接头中存在明显的接头软化现象。接头的最大抗拉强度为母材的70.84%,断裂发生在试样焊缝边缘位置。 |
关键词: 2219铝合金;激光-TIG复合焊;显微组织;力学性能 |
基金项目: |
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Analysis of Microstructure and Properties of 2219 Laser-TIG Hybrid Welded Joints |
Chen Jing1, Dong Fei2, Huang Zhenhui1, Guo Jiao1, Zhen Yong1
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1. Capital Aerospace Machinery Co., Ltd., Beijing 100076;2. Xi’an Space Engine Co., Ltd., Xi’an 710100
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Abstract: |
In this paper, 2219 aluminum alloy with the thickness of 4mm was welded by laser-TIG hybrid welding. The characterizations of joints were analyzed by optical microscope, microhardness and tensile tests. The microhardness of weld and heat effect zone were less than that of base metal. The maximum tensile strength of joints is 70.84% of the base metal, and the failure occurred at the interface of weld and heat effect zone. |
Key words: 2219 aluminum alloy;laser-TIG hybrid weld;microstructure;mechanical properties |