镁合金绿色高效焊接技术研究进展

Research on Green and Effi cient Welding Technology of Mg Alloy

镁合金是航空航天领域应用最为广泛的轻合金之一。随着镁合金应用的不断深入,对具有高精度、低能耗、高效率特征的绿色焊接技术提出了迫切需求,并成为镁合金焊接制造发展的重要方向。针对上述需求,围绕镁合金激光诱导电弧复合焊接技术,镁合金活性高效焊接技术以及镁合金与异种金属的连接技术展开系统研究。采用激光诱导电弧复合焊接技术成功实现了镁合金低能耗高效焊接制造,与传统电弧焊接相比显著提高了焊接制造效率,降低了焊接制造能耗。采用激光胶焊技术及激光-电弧复合焊接技术实现了镁合金与铝合金及镁合金和钢铁的高性能焊接制造。上述绿色焊接制造技术研究成果为实现航空镁合金轻量化结构件的设计和制造提供了有力支撑。

Mg alloy is one of the most widely used light alloys in aerospace manufacture. With the further applica- tion of Mg alloy, the Green welding technology of Mg alloy is required urgently, which is provided with the high precision, low energy consumption, high efficiency characteristics. It has become an important direction for development of Mg alloy welding manufacture. This research focuses on Mg alloy laser-induced arc hybrid welding technology, efficient activated welding technology and dissimilar metals joining technology. The laser-induced arc hybrid welding technology is used successfully to join Mg alloy with low energy and high efficient, which improves the welding efficiency and reduces the energy consumption significantly, compared with the ordinary arc welding technology. Laser weld bonding technology and laserarc hybrid welding technology are used successfully to join Mg alloy to A1 alloy and steel. The above research provides a strong support on the design and manufacture of Mg lightweight aircraft components.