Study on 10 kW fiber laser welding process

万瓦级光纤激光焊接工艺研究 Study on 10 kW fiber laser welding process 蒋宝 JIANG Bao 1 first-author 黄瑞生 HUANG Ruisheng 1 李琳琳 LI Linlin 2 滕彬 TENG Bin 1 邹吉鹏 ZOU Jipeng 1 李振华 LI Zhenhua 3 武鹏博 WU Pengbo 1 哈尔滨焊接研究院有限公司 哈尔滨焊接研究院有限公司 Norinco Group Air Ammunition Research Institute Co.,Ltd. Norinco Group Air Ammunition Research Institute Co.,Ltd. 中国兵器工业集团航空弹药研究院有限公司 中国兵器工业集团航空弹药研究院有限公司 HIT Welding Industry Co.,Ltd. HIT Welding Industry Co.,Ltd. 哈焊所华通(常州)焊业股份有限公司  哈焊所华通(常州)焊业股份有限公司  Harbin Welding Institute Limited Company Harbin Welding Institute Limited Company 为研究万瓦级光纤激光自熔焊接焊缝成形规律,进而实现30 kW激光功率条件下焊缝的良好成形,试验以30 mm和40 mm厚Q235低碳钢为研究对象,在平板堆焊基础上,分析不同激光功率、离焦量、焊接速度和侧吹压力条件下的焊缝成形特征,并利用自制小型侧吹装置进行了工艺参数优化和焊缝成形控制。结果表明,万瓦级激光焊接时,特别是当激光功率达到30 kW时,单一通过离焦量或焊接速度的改变难以获得良好的焊缝成形,焊缝均匀性差、焊接飞溅大;通过在试板上方施加横向侧吹并在侧吹压力为0.3～0.4 MPa时,可有效改善焊缝成形,减少焊接飞溅,同时焊缝熔深可提高20%以上;通过工艺参数的进一步优化,最终在横向侧吹压力为0.4 MPa、焊接速度为0.6 m/min时实现了30 kW激光焊接时焊缝表面成形的良好控制。 In order to study the weld forming law of the 10 kW fiber laser self-fusion welding, and then realize the well formed weld under the condition of 30 kW laser power, the test taking30 mm and 40 mm thick Q235 low carbon steels as research object are carried out. On the basis of flat welding, the weld characteristics were analyzed under the conditions of different laser powers, defocusing amounts, welding speeds and side blow pressures. The welding parameters were optimized and the weld forming was controlled by self-made small side blow device.The results show that when the laser power reaches 30 k W, it is difficult to obtain a good weld formation only by changing the defocusing amount or welding speed, and the weld uniformity is poor and the welding spatter is large. Applying transverse side blow pressure of 0.3 ～0.4 MPa on the test plate can effectively improve the weld formation, reduce the welding spatter, and increase the weld penetration depth by more than 20%. Through the further optimization of the welding parameters, the weld surface forming control was realized during 30 kW laser welding with transverse side blow pressure of 0.4 MPa and welding speed of 0.6 m/min. 万瓦级 光纤激光 30 kW 参数优化 侧吹 10 kW level fiber laser 30 kW parameter optimization side blow TG456.7 2022-03-08 10 51