一、前言随着焊接构件的大型化,使用大厚度钢材的地方也多起来了。对制造工程来说,希望发展既能提高焊接施工效率,又可获得高性能接头的焊接方法及材料。以往这种焊接都是使用坡口断面积很大的埋弧焊(SAW)及电渣焊接法(ESW),而窄坡口焊接法也是能满足上述要求的方法之一。 First, the foreword With the large-scale welding components, the use of large-thickness steel where more. For manufacturing projects, it is hoped to develop welding methods and materials that will both improve the efficiency of welding operations and provide high-performance joints. In the past, this type of welding used submerged arc welding (SAW) and electroslag welding (ESW) with a large groove area, and narrow bevel welding was one of the ways to meet the above requirements.