在对钻井工具的焊接特点、MAG焊接缺陷进行分析的基础上,通过选择合适的焊接材料、优选焊接工艺参数、采用合理的环缝焊接操作技术,克服了MAG焊易出现的气孔、熔化区开裂缺陷,焊缝金相组织为回火索氏体,成功的将MAG焊应用到了钻井工具制造领域,提高了焊接效率、降低了焊接成本。 Based on the analysis of the welding characteristics of drilling tools and the defects of MAG welding, the suitable girth welding operation technique was adopted by choosing suitable welding materials, optimizing the welding process parameters and adopting the reasonable girth welding operation technique to overcome the porosity and melting zone cracking in MAG welding Defects, the weld microstructure of tempered sorbite, the successful application of MAG welding drilling tools to the field of production, improve the welding efficiency and reduce the cost of welding.