Welding is the process of joining together two pieces of metal. This is done by melting the work pieces and adding a filler material to form a pool of molten material called the weld pool. The weld pool cools to become a strong joint , which produces the weld by itself or due to pressure used in conjunction with heat. The two most common types of welding are Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) welding. Some differences between the two are:MIG weldingProcess: The MIG weld process fuses the metal by heating with an arc. The arc is placed between the filler metal electrode and the work piece. An outwardly supplied gas is used for shielding. The way the filler metal is added : Both MIG and TIG welding are gas shielded arc welding processes. The primary difference is in the way the filler metal is added to produce the weld. MIG welding uses a filler metal , which is the electrode. The arc is created when the filler metal comes into contact with the work surface.Skills : A MIG welder can be a novice welder as this process does not require much skill. Speed : TIG welding is faster because it does not require much skill. TIG weldingProcess : The TIG weld process fuses metals by heating them with tungsten electrodes , which do not become part of the completed weld. This process uses argon or other inert gas mixtures as shielding and filler metals are rarely used.The way the filler metal is added : Both MIG and TIG welding are gas shielded arc welding processes. The primary difference is in the way the filler metal is added to produce the weld. In TIG welding , the arc is created between the tungsten electrode mounted in a hand-held torch and the work piece. The welder initiates the arc by means of a switch. The filler metal , in the form of a hand-held rod , is then added to the weld puddle by the welder as the torch is manipulated along the joint which is to be welded.Skills : A TIG welder must have sufficient expertise and experience in handling this type of welding.Speed : MIG welding is slower because it requires a lot of skill and patience to master it.
