前言近年来随着现代工业技术的飞跃发展,在生产部门中开始大量采用铝、钛、钒、锆、钽以及这些金属的合金。因此这些新型材料的焊接问题直接关系到它们的应用和发展。为解决这一问题,对焊机的适应性能和焊接质量都提出了更高的要求。采用原来的一些焊接方法焊接这些金属和合金已不能获得满意的结果了。因此,最近四十年来人们一直在探索研制适用于 Preface In recent years, with the rapid development of modern industrial technology, aluminum, titanium, vanadium, zirconium, tantalum and alloys of these metals have been widely used in the production sector. Therefore, the welding of these new materials is directly related to their application and development. To solve this problem, the welding machine adaptability and quality of welding have put forward higher requirements. Using some of the original welding methods to weld these metals and alloys has been unable to obtain satisfactory results. Therefore, people have been exploring the development for the last four decades