Abstract
This chapter covers the welding processes that are based on creating an arc between the electrodes, either consumable or non-consumable, and the workpiece, showing the principles and mechanisms behind generating the arcs of welding processes, such as gas tungsten and gas metal, plasma arc, hybrid plasma, and submerged arc welding (SAW) processes. At the beginning of the chapter, comprehensive details are given to cover plasma arc welding, types, features of formation of the plasma jet, the influence of the plasma medium composition on its efficiency and interaction with molten metal, main parameters of the welding process mode and recommendations on their selection. Then other types of arc welding processes will be covered, such as gas tungsten arc welding, gas metal arc welding, and SAW. In general, the metallurgical and thermo-deformation processes associated with the welding processes are explained. In addition, the macro and microstructure of welded joint benefits and disadvantages/disadvantages of the welding methods and the areas of applications are shown.
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