铝合金连续-脉冲激光焊接工艺对比实验研究

Experiment study of aluminum alloy continuous-pulsed laser welding process

为了研究5052铝合金激光焊接工艺,采用脉冲激光和连续激光分别对1.5mm厚的5052铝合金板进行了焊接,并对工艺参量进行了优化。通过对两种不同类型激光焊接试样的焊缝形貌的对比、微观组织的分析、抗拉强度和显微硬度测试,可知脉冲激光焊接对焊接接头气孔的控制更为理想,使得脉冲激光焊接所获得的焊接质量更加优异,与连续激光焊接相比,其接头的抗拉强度增加了10%。结果表明,脉冲激光焊接和连续激光焊接均可以使焊接试样得到较为理想的焊缝形貌和较高的抗拉强度。

In order to study the welding process of 5052 aluminum alloy, 5052 aluminum alloy plates in 1.5ram thick were welded with pulsed and continuous laser respectively, then the process parameters were improved. After comparing their microstructures, tensile strength and micro hardness, it can be seen that pulsed laser welding is more ideal for control the porosity of welding joint, its welding quality is more excellent, and that the tensile strength of the welding joint is increased by 10%. The results show that both pulsed laser welding and continuous laser welding can make welded samples obtain ideal welds morphology and high tensile strength.