镁合金激光焊气孔问题研究现状与展望

Research status and prospect on porosity during laser welding of magnesium alloy

综述了近年来针对镁合金激光焊气孔问题的国内外研究进展。对镁合金激光焊气孔产生的原因、影响因素及防止措施进行了分析,认为由母材的制造工艺所决定的原始含气量是影响镁合金激光焊气孔倾向的主要因素,而针对不同含气量的母材需要采取不同的气孔防止措施。提出了压铸镁合金激光焊气孔防止技术的研究方向。

In this paper domestic and overseas research advance in porosity during laser welding of magnesium alloy is reviewed in the following aspects:reason,influencing factors and prevention measures of pore formation. It is considered that gas content of base metal determined by manufacture processes is the main influencing factor of tendency to pore formation during laser welding. Prevention measures of pore formation have to be carried out according to different gas content of base metal. At the same time the research direction of prevention of pore formation during laser welding of die-cast magnesium alloys,which have high gas content,is put forward.