摘要
研究了自保护药芯焊丝激光-电弧复合堆焊的熔滴过渡行为。结果表明,激光的加入明显减小了电弧斑点的漂移概率,拉伸了电弧空间,改变了熔滴受力状态及其过渡行为。激光前置比后置时更有利于熔滴过渡和电弧稳定性的提高。自保护药芯焊丝激光-电弧复合堆焊的最佳工艺参数为:激光前置,激光功率2kW,光丝间距+4mm,光斑直径为2mm,光丝夹角30°。当光丝间距小且激光功率为4kW时,熔滴过渡形式由排斥过渡变为爆炸过渡。
The droplet transition behavior of laser-arc hybrid surfacing with self-shielded flux-cored wire is studied.The results show that the introduction of laser makes the arc wandering probability significantly reduced,arc space stretched,droplet stress state and transition behavior changed.Laser preposition is more beneficial to droplet transfer and arc stability improvement than laser postposition.The optimal process parameters of laser-arc hybrid surfacing with self-shielded flux-cored wire are laser preposition,laser power of 2 kW,laser-arc distance of＋4 mm,light spot diameter of 2 mm and laser-arc angle of 30°.When laser-arc distance is small and laser power is4 kW,the droplet transition mode is changed from repelled transfer to explosive transfer.
作者
刘西洋
孙凤莲
王君宇
赵御民
Liu Xiyang;Sun Fenglian;Wang Junyu;Zhao Yumin(School of Material Science and Engineering,Harbin University of Science and Technology Harbin,Heilongjiang 150080,China;Research and Development Center,Harbin Welding Institute Limited Company,Harbin,Heilongjiang 150028,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第8期102-113,共12页
Chinese Journal of Lasers
基金
三明市指导性科技项目(2017-G-29)
机械科学研究总院技术发展基金(20170722)
关键词
激光技术
激光-电弧复合堆焊
熔滴过渡
自保护药芯焊丝
工艺参数
laser technique
laser-arc hybrid surfacing
droplet transition
self-shielded flux-cored wire
technological parameters
