TIG welding types

TIG (Tungsten Inert Gas) welding is a welding method that uses tungsten as an electrode and is protected by an inert gas (usually argon). TIG welding can be divided into many types according to different application scenarios and technical requirements. The following are several common types of TIG welding:

1. DC TIG welding method
DC TIG welding method is the most basic TIG welding method, in which the workpiece is connected to the positive pole of the power supply and the tungsten electrode in the welding torch is used as the negative pole. This welding method is suitable for welding most metal materials.

2. AC TIG welding method
AC TIG welding method uses an AC power supply to make the arc alternate between positive and negative poles. This method is particularly suitable for welding aluminum and its alloys because AC can help remove the oxide film.

3. Pulse TIG welding method
Pulse TIG welding method can better control the welding heat input, reduce the heat-affected zone, and help improve the welding accuracy and quality by applying a pulse current during the welding process. This technology is suitable for precision welding and welding of thin plate materials.

4. Active TIG welding
Active TIG welding is an improved TIG welding method. By adding active elements (such as helium, hydrogen, etc.) to the shielding gas, the welding depth and welding efficiency can be significantly improved. Active TIG welding is further subdivided into various types, such as coating type, shielding gas introduction type, etc.

5. Fuse TIG welding
Fuse TIG welding is a welding method that combines the advantages of TIG welding and MIG welding. In this method, in addition to the tungsten electrode, a filler wire is also used. By adjusting the feeding speed of the wire and the welding parameters, higher welding efficiency and better weld quality can be achieved.

6. Hot wire TIG welding
Hot wire TIG welding is an efficient welding method developed on the basis of traditional cold wire TIG welding. By preheating the wire before feeding it, the melting speed of the wire can be significantly increased, thereby improving welding production efficiency. High-efficiency hot wire TIG welding can increase the deposition rate from 0.3~0.5kg/h to 2~4kg/h without changing the welding line energy.

7. A-TIG welding
A-TIG welding (active TIG welding) is a TIG welding method that uses active elements (such as helium, hydrogen, etc.) to improve welding performance. Compared with conventional TIG welding, A-TIG welding can significantly reduce the weld width, refine the weld structure, and improve the mechanical properties of the welded joint.

8. Partitioned active TIG (FZ-TIG) welding
Partitioned active TIG (FZ-TIG) welding is a new type of active TIG welding method. By introducing different active elements in different areas, it can ensure that the weld penetration is significantly increased while maintaining good weld formation.

The above are several common TIG welding types, each of which has its specific application scenarios and technical advantages. Choosing the right TIG welding type is crucial to ensuring welding quality and improving production efficiency.