ABSTRACT
Nickel base superalloy with high temperature, high strength, high durability and good comprehensive properties such as resistance, welding performance. At present, in the actual production of nickel based superalloy welding is the most widely used manual electric arc welding and argon tungsten arc welding. The conventional TIG welding with the welding arc stability, weld can ensure internal quality, appearance, suitable for welding in the advantages of difficult places, under the protection of inert gas. But the conventional TIG welding single pass welding depth, is only suitable for welding thin plate[1]. If the increase in input current, the weld width will be very wide, and the increase of penetration depth is not obvious. By using helium as a protective gas penetration is very limited, and will greatly increase the cost of production. A-TIG compared with the conventional TIG welding, in the same welding condition, can greatly improve the penetration depth (as shown in Fig. 1-1), at the same time reduce welding time 50%, improve the welding efficiency 2-6 times, reduce the cost of welding.
