subject: An Outline On Tungsten Inert Gas Welding [print this page] Tungsten inert gas welding shortly known as tig welding is used for joining different types of metals. It is one of the commonly used
high-quality welding process. Moreover, it is one of the most popular choices of welding processes when first-rate precision welding is required.
When it comes to tungsten arc welding process, the heat of an electrical arc is used to melt the metal of a work piece in order to
create a weld. Unlike (MIG) welding i.e. metal inert gas, TIG welding makes use of a tungsten electrode that does not thaw out and put in to the weld material; thereby a separate filler rod comes into play and it is used as needed. Tig welding process is
often used for
1. Stainless steel welding
2. Thereby produces a clean, smooth weld.
This is all about tig welding as concerned. Now let us see some of the tools used in this process. Its equipment consists of
1. TIG welding machine
2. shielding gas
3. shielding gas (usually argon)
4. filler rod
5. filler material
6. protective gear
As far as the welding machine is concerned it consists of a power supply and a welding gun which holds the tungsten electrode and it has a regulator or valve to adjust the flow of shielding gas.
Of all metals, tungsten has the highest melting point. As a result, the electrode never makes a temperature where it melts.
On the other hand, there are loads of possibilities for the electrode to wear down, hence it a must inspect and reshape it, as and when it is needed prior to welding. For the reason that the tungsten does not thaw out, separate filler rods are used to adjoin
material to the weld. Since the shielding gas comes into play the requirement of the flux is avoided.
Unlike other welding procedures the process of TIG welding is alike to other types of welding.
Pointed perpendicularly to the work surface, the welding gun must be held in the welders hand. Just about 10 degrees from vertical,
the electrode is pointed slightly forward and thereby the welder starts off by moving the electrode in a small circle at the
beginning of the weld to thaw out the metal, structuring a small pool, then moving further. Having the electrode held in this way will help the welder to push the pool of molten metal at the electrode tip to the fore and the shielding gas can optimally cover the weld area.
At the same time, a small, consistent distance between the electrode and the work piece should be maintained by the welder. In other arc welding methods, the tolerance is smaller thereby making the tig welding more difficult. Corresponding to this action, the welder must move the electrode cyclically forward, toting up material from the filler rod as required to fill the weld.
Some of the Benefits of TIG Welding include the following:
1. high quality welds
2. Welding works can be done with or without filler metal
