TITLE:
Analysis of Laser Micro Welding of Copper-Aluminum Dissimilar Metals and Its Mechanism
AUTHORS:
Jiang Huang, Wenqing Shi, Yuping Xie, Zhigang Liang, Jinming Zhan
KEYWORDS:
Mciro Welding, Laser Welding, Copper-Aluminum, Dissimilar Metals, Mechanism
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.7 No.12,
December
24,
2019
ABSTRACT: Micro welding of dissimilar metals can meet many performance requirements for modern engineering structures. In this experiment, laser micro welding of copper-aluminum dissimilar metals was conducted with an HWLW-300A energy negative feedback Nd:YAG pulse laser. By using the overlap welding method with copper on aluminum, with the laser energy being distributed unevenly, good weld joints were obtained. In this paper, the welding mechanism was analyzed from aspects such as welding temperature and the specific heat capacity of the solid metal. Existing defects were identified, and a feasible improvement scheme was proposed.