电子束填丝工艺对堆焊焊缝成形的影响

Effects of electron beam welding with filler wire process on surfacing weld appearance

利用电子束填丝焊工艺在304不锈钢基体表面堆焊低碳钢焊丝获得堆焊层,并系统地研究了影响堆焊层成形质量的主要工艺参数.重点讨论了束流、焊接速度、送丝速度、填丝角度和填丝方位对堆焊层宏观质量的影响规律.结果表明,焊接热输入和送丝速度的匹配是决定焊缝成形的最主要因素,在相同工艺参数下,焊缝宽度取决于束流,束流越大,焊缝越宽,填丝角度影响着焊缝熔深,随填丝角度的增大,熔深逐渐增大,而采用前置填丝方位更易保证焊接过程的稳定及焊接精度.

In this paper low carbon steel surfacing layers were formed on 304 stainless steel by electron beam welding with filler wire process to explain the relations between weld appearance and main process parameters. The effects of such welding parameters as electron beam,welding speed,wire feed rate,wire feeding angle and wire feed position on weld appearance were researched. The results showed that the match of weld heat input with wire feed rate was the main factor which determined weld appearance. In the same process,the width of the weld increased while the electron beam increased. Meanwhile, the depth of the weld increased with increasing of the wire feeding angle. In addition,the welding process could be more stable and precise when the front wire feed position was adopted.