The latest research on welding methods was introduced, mainly including the improvement of submerged-arc welding, plasma welding and laser welding, the attempt of butt resistance welding, the application of dual torch technique and so on. 介绍了国内外双相不锈钢焊接方法的最新动态,主要有埋弧焊、等离子弧焊和激光焊的改进、电阻对焊的尝试、新型双弧焊接技术的应用等;