Laser pressure welding of copper

被引：14

作者：

Zhang, Jingquan ^{[1
]}

Huang, Ting ^{[1
]}

Mironov, Sergey ^{[1
]}

Wang, Dong ^{[1
]}

Zhang, Qingwei ^{[1
]}

Wu, Qiang ^{[1
]}

Xu, Jiejie ^{[1
]}

Xiao, Rongshi ^{[1
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, High Power & Ultrafast Laser Mfg Lab, Beijing 100129, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2021年 / 134卷

基金：

中国国家自然科学基金;

关键词：

Copper; Laser welding; Microstructure; Weld formation mechanism; SOLAR; PERFORMANCE; ALLOY;

D O I：

10.1016/j.optiastec.2020.106645

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Industrial application of copper often requires a joining. Unfortunately, a commercial laser welding of this material is challenging due to extremely high reflectivity of copper at the near-infrared wavelength. In this work, the sound copper joints were produced at relatively high welding speed of 15 m/min by using a pressure-assisted fiber-laser welding. It was theoretically shown that the material melting arisen from a convergence of multiple reflections of the laser beam. By using electron backscatter diffraction (EBSD), it was found that microstructural changes were induced by a laser-induced thermal effect as well as a roller-induced pressure. It was deduced that the molten material solidified before feeding to the pressure rolls and thus it experienced a notable plastic strain during the welding process. The present work provides an effective method for commercial joining of high-reflective metals by using the near-infrared fiber laser.

引用

页数：8

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