摘要
以5.0mm厚高强钢板为实验材料,采用CO2激光-MAG电弧复合焊接方法,研究了光丝间距对复合焊接熔滴过渡特征、焊缝形貌和焊缝溶质分布的影响。结果表明,复合焊接中光丝间距大小影响了两种热源的相互作用效果,导致熔滴过渡形式不同,其中光丝间距为4mm熔滴过渡频率最大,焊缝形貌较好。而复合焊接熔池冷却结晶过程伴随着液态金属的流动,液态金属的流动是影响焊缝内溶质分布的重要因素。在光丝间距DLA=3mm,添加元素与熔池表面距离为1.0mm时,所添加元素在熔池中含量较高且其分布最为均匀。
In this essay,the experimental material is 5.0mm thick high strength steel plate,and analyzes the weld shaping,droplets transfer characteristics and melt flow on impurity distribution of hybrid welding processes of CO2 laser-MAG hybrid welding with different the distance between laser and arc.Experimental results show that：the effect of two heat sources interaction effect is changed with different distance with laser and arc.When the distance is 4 mm,the frequency of the droplet transfer is the maximun and the weld shaping is more smooth.The crystallization process of the molten pool accompanied by the liquid metal flow.And the influence of the liquid metal flow is very important to melt flow on impurity distribution.When DLA=3mm and the distance to molten pool surface is 1.0mm the adding elements in the molten pool content is higher and its distribution is the most uniform.
出处
《应用激光》
CSCD
北大核心
2015年第4期445-450,共6页
Applied Laser
关键词
激光-电弧复合焊接
熔滴过渡
熔滴过渡频率
焊缝成形
光丝间距
熔池流动
laser-arc hybrid welding
droplets transfer
frequency of droplets transfer
weld shaping
distance between laser and arc
molten pool flow
