STT根焊技术在管道焊接中的应用

分析了STT根焊技术的特点、原理,阐述了STT焊接坡口形式,焊接工艺参数中送丝速度、基值电流、峰值电流等对焊道成形的影响以及焊接工艺参数的设置。针对STT焊接操作技术,详细介绍了STT根焊在不同焊接位置时的后拖角、焊接干伸长的控制、熔合性能的保证、焊接熔池的控制以及焊接运弧、错口技术的处理技巧等,并总结了焊接飞溅过大、焊接密集气孔、焊道熔合不良等常见焊接问题及其解决措施。

Research and application of STT root Welding process in the pipe welding

This paper analyzes the characteristic and the working principle of the STT root welding technology,expatiate on the joint design,the influence of wire feed rate,base value current,peak value current on the appearance of weld and the setting range of welding parameter.Some operative technique to ensure the welding quality is particular introduced in the paper.Besides,the article summarizes some usual problems such as excessive spatter,porosity,poor fusion and measures to solve them.