The most important characteristic of laser welding of aluminum alloy is its high efficiency, and it is important to use it in the deep penetration welding process. Therefore, it is an inevitable trend to study and use high power laser for the future development of deep penetration welding. Large
thickness of deep penetration welding is becoming more and more highlighted the keyhole scene and its influence on weld porosity, and a small hole mechanism and control is becoming more and more important, it will become in the future of the hot issues in the academic and industrial attention and research.
electromagnetic force to control the flow of molten pool, so as to improve the stability of the welding process, improve the quality of the weld, may also be more attention of researchers.