高亮度固体激光,特别是光纤激光以其光束质量高、加工柔性好、运行成本低等综合优势,吸引了国内外研究人员的广泛关注. 结合作者的研究工作,概括了高亮度固体激光焊接模式转变过程、羽辉特性、飞溅特性、深熔小孔壁形貌及孔内能量耦合等焊接物理过程方面的最新研究进展. 阐述了大厚板材超窄间隙激光焊、异种金属熔钎焊、激光电弧复合焊等焊接方法的最新研究.%High brightness solid-state lasers, especially the fiber laser, have received extensive attention all over the world owing to their favorable comprehensive advantages, such as high beam quality, high processing flexibility, and low operating cost. In this paper, some aspects on high brightness solid laser welding physical processes, such as the transition of welding mode, laser-induced plume, spatters, the micro-morphology of the keyhole wall and the energy coupling in the keyhole are reviewed. Additionally, some new welding methods, including ultra-narrow gap laser welding of heavy section, laser penetration brazing of dissimilar alloys, and laser-arc hybrid welding, are also reviewed.
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