根部焊道焊接(又称打底焊)质量的好坏是关系到焊缝成功与否很关键的第一步,焊接缺陷往往容易发生在这个地方。在进行管子对接时,因此时无法进行双面焊,但又要要求管子内壁成型光滑、均匀、无裂缝,要想获得高质量的焊缝是比较困难的。本文向您介绍的根部焊道加熔化嵌条的方法,就能很好的解决上述问题。嵌条(顶置填充金属)可用一般氩弧焊方法来熔化,这点尤其有利于管子或封闭型的 Root weld (also known as backing welding) quality is related to the success or failure of the weld is a crucial first step, welding defects are often prone to occur in this place. In the pipe butt, so when can not be double-sided welding, but also require the pipe wall molding smooth, uniform, no cracks, in order to obtain high-quality weld is more difficult. This article introduces you to the root of the weld bead with the method of melting can be a good solution to the above problems. The fillet (top-fill metal) can be melted by a common argon arc welding method, which is especially advantageous for pipes or closed-type