细管径侧吹气体流量对光纤激光中厚板焊接的影响

发布时间：2018-04-16 07:03

本文选题：激光加工 + 光纤激光焊接　；参考：《中国激光》2017年03期

【摘要】：在细管径侧吹气体的辅助下,对SUS 304不锈钢试样进行了光纤激光焊接,使用高速摄影设备配合背景激光光源对匙孔、熔池以及金属蒸气的行为进行了观察,并对焊缝熔深和焊缝成形进行了分析。结果表明:在激光功率、焊接速度、离焦量、喷嘴位置与角度等参数一定的情况下,焊缝熔深随着细管径侧吹气体流量的增大而增加。细管径侧吹气体可以明显打开匙孔并维持匙孔稳定性,并扩大熔池面积。气体流量大小对焊缝成形有较大影响。当无细管径侧吹气体时,飞溅较大,焊缝成形均匀;当气体流量较小时,飞溅较小,且焊缝成形均匀;当气流量过大时,飞溅较小,但焊缝成形较差。
[Abstract]:The optical fiber laser welding of SUS 304 stainless steel specimen was carried out with the aid of pipe diameter side blowing gas. The behavior of keyhole, molten pool and metal vapor was observed by using high speed photography equipment and background laser light source.The weld penetration and weld forming are analyzed.The results show that the weld penetration depth increases with the increase of pipe diameter gas flow rate under the certain parameters such as laser power welding speed defocus nozzle position and angle.The pipe diameter side blowing gas can obviously open the keyhole and maintain the stability of the keyhole and enlarge the pool area.Gas flow rate has great influence on weld forming.When there is no pipe diameter side blowing gas, the spatter is larger, the weld is uniform; when the gas flow is small, the splash is smaller, and the weld is uniform; when the gas flow is too large, the splash is smaller, but the weld formation is poor.
【作者单位】：上海交通大学材料科学与工程学院上海市激光制造与表面改性重点实验室;液化空气(中国)研发有限公司;
【分类号】：TG456.7

【参考文献】