论文部分内容阅读
为了研究激光-电弧复合焊不同引导方式对铝合金焊接成形质量的影响,采用YAG激光-MIG电弧复合热源对10mm厚5083铝合金板进行平板堆焊试验,并采用HANNOVER电弧分析仪、高速摄像机、金相显微镜等设备研究不同引导方式下焊缝宏观组织和微观组织的影响。研究表明,不同引导方式对焊缝成形有较大影响。电弧引导激光焊接(Arc-laser hybrid welding leading,AL)时,激光与电弧两热源的耦合效果好,焊缝截面成型良好,为典型的“蘑菇”状;激光引导电弧焊接(Laser-Arc hybrid welding leading,LL)激光电弧作用区主要为等轴细晶粒,AL为明显的等轴树枝晶和细小的等轴晶粒。同时二者接头焊缝中心硬度值均略低于焊缝中心到熔合线之间的硬度值。LL焊接较AL时熔池振荡严重,熔滴易呈爆炸倾向过渡。
In order to study the effect of laser-arc hybrid welding on the quality of aluminum alloy welding, the YAG laser-MIG composite heat source was used to test the surfacing welding of 10mm thick 5083 aluminum alloy plate by HANNOVER arc analyzer, high speed camera, Metallurgical microscopes and other equipment to study the different guide ways under the microstructure and microstructure of the weld. The research shows that different guiding ways have a great influence on the weld forming. Laser-Arc welding (AL), the laser and the arc of the two heat source coupling effect, the weld cross-section shape is good, the typical “mushroom” shape; Laser-guided arc welding hybrid welding leading, LL) The main area of laser arc is equiaxed fine grains, AL is obviously equiaxed dendrites and fine equiaxed grains. At the same time, the weld center hardness of both joints are slightly lower than the weld center to the fusion line between the hardness value. LL welding bath oscillation than AL serious, easy to drop the tendency of explosive transition.