Improvement of 550W pulsed Nd:YAG laser welding effect of 1mm thick sheet aluminum alloy

摘要

The paper discussed experimentally that a smaller (550 W) pulsed Nd:YAG laser can be used to make full penetration butt welds in 1mm thick sheet Al - 5154 by coating the sheet aluminum surface and preheating the sheet aluminum due to increasing the absorption of the Al - sheets being welded. It was found that sanding aluminum surface, coating China - ink on aluminum surface and preheating aluminum alloy up to 300 deg C are all the practical and effective steps for improving the welding effect of smaller power laser, made a comparison between experimental results.