焊前和焊后时效处理对Al - Mg - Si - Cu合金焊接接头组织和力学性能的影响

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2026-09-01 Epub Date: 2026-10-08 DOI:10.1016/S1003-6326(26)67111-7

Yi-fei CHEN, Shun-cun LUO, Jia-jie ZHANG, Yang-yang WU, Xiao-nan WANG, Zeng-rong HU, Hiromi NAGAUMI

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引用次数: 0

摘要

采用脉冲冷金属转移（CMT+P）焊接技术。采用焊前时效和焊后时效相结合的方法对Al - Mg - Si - Cu合金焊接接头的热影响区组织和力学性能进行了调节。结果表明，焊前时效可以提高溶质原子的扩散速率，促进ginier−Preston （GP）区形成。焊接热循环后，GP区迅速转变为粗平衡相，一些小颗粒溶解回基体中。焊后时效促进了析出物的二次析出。经（180℃，1 h）焊前时效+（180℃，1 h）焊后时效处理后，接头热影响区抗拉强度达到319.7 MPa，比T4状态提高34.1%，焊接系数达到82.0%。

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Effects of pre-weld and post-weld aging treatments on microstructure and mechanical properties of Al−Mg−Si−Cu alloy welded joints

The pulsed cold metal transfer (CMT+P) welding technology was utilized. Pre-weld aging treatment combined with post-weld aging treatment was employed to regulate the microstructure and mechanical properties of the heat-affected zone (HAZ) in Al−Mg−Si−Cu alloy welded joints. Results indicate that pre-weld aging can enhance the diffusion rate of the solute atoms and promote Guinier−Preston (GP) zones. After welding thermal cycling, the GP zones quickly transform into a coarse equilibrium phase, and some small particles dissolve back into the matrix. Post-weld aging promotes secondary precipitation of precipitates. After (180 °C, 1 h) pre-weld aging + (180 °C, 1 h) post-weld aging treatment, the tensile strength of the HAZ in the joint reaches 319.7 MPa, which is 34.1% higher than that in the T4 state, and the welding coefficient reaches 82.0%.

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.