This article introduces the structure and function of automatic overlaying which used on inner surface of small diameter tube and expounds the process parameters overlay and compound of welding wire.

• 介绍了小直径管子内表面自动堆焊所用焊丝的成分和堆焊的工艺参数,简要介绍了焊接设备的组成及功能,并以实例论证。