Experiment welding of Al/Cu dissimilar metals with infrared-blue hybrid laser welding for power battery

被引：0

作者：

Zhang, Yuxuan ^{[1
,2
]}

Zhang, Mingjun ^{[1
,2
,3
]}

Li, Heqing ^{[1
,2
]}

Zhang, Jian ^{[1
,2
]}

Cheng, Bo ^{[1
,2
]}

Mao, Cong ^{[1
,2
]}

Cheng, Shuangyin ^{[3
]}

机构：

[1] College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha

[2] Hunan Provincial Key Laboratory of Key Technologies for High-performance Intelligent Manufacturing of Mechanical Equipment, Changsha University of Science and Technology, Changsha

[3] Changsha Niumi Drive Technology Co., Ltd., Changsha

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2025年 / 46卷 / 01期

关键词：

Al/Cu dissimilar metal; infrared-blue hybrid laser welding; intermetallic compound; laser welding; mechanical properties;

D O I：

10.12073/j.hjxb.20231027001

中图分类号：

学科分类号：

摘要：

Aiming at the technical difficulties of laser overlap welding of Al/Cu dissimilar metals, a new infrared-blue hybrid laser welding process was proposed. Laser welding of the overlap joints of 5052 aluminum alloy and T2 copper with thickness of 1 mm was carried out. The effects of different blue laser powers on the weld appearance, microstructure and mechanical properties of the joints were investigated. The results showed that the convection diffusion of copper elements from the lower copper plate to the upper aluminum plate could be weakened by using infrared-blue laser hybrid welding process with a blue laser power in the range of 0 ~ 500 W. With the increase of blue laser power, the mixing degree of molten copper and aluminum was increased, resulting in more brittle Al-Cu intermetallic compound (IMC) phases. Generates the following phases in the order from the copper side to the aluminum side，ϒ2-Al4Cu9, AlCu, θ-Al2Cu, α-Al + Al2Cu eutectic structure and Al/Cu eutectic structure. Among these, Al2Cu was the primary IMC phase at the interface layer of the joints. When the infrared laser power was 1050 W and the blue laser power was 300 W, the shear resistance of the joint reached up to 795.51 N. The joint was broken at the heat affected zone (HAZ) of the upper aluminum plate with a ductile fracture mode. Highlights: (1) Aiming at the technical difficulties of laser overlap welding of Al/Cu dissimilar metals, a new infrared-blue hybrid laser welding process was proposed. (2) The effects of different blue laser powers on the weld appearance, microstructure and mechanical properties of the joints were investigated. © 2025 Harbin Research Institute of Welding. All rights reserved.

引用

页码：87 / 94

页数：7

共 23 条

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