本文介绍了CO2气体保护焊的技术特点及存在的问题,详细阐述管材全位置单面焊双面成形技术手法和操作要领。实践证明,该技术稳定可靠,具有操作简单、熔池容易控制、背面焊缝成形优良、焊接质量好等特点,在实际操作中取得良好的效果。 This paper introduces the technical characteristics and existing problems of CO2 gas shielded welding, and elaborates the technique and operation essentials of double-sided forming of all-position single-side welding of pipe. Practice has proved that the technology is stable and reliable, with simple operation, easy control of the molten pool, the back of the weld formation, welding quality is good, and achieved good results in practice.