ARC WELDING TYPICAL PROCESSES BASICS AND TUTORIALS

TYPES OF ARC WELDING BASIC INFORMATION
What Are the Types of Arc Welding?


Shielded metal arc welding (SMAW): 
Shielded metal arc welding, which is also known as stick welding, is the most widely used process. The arc is struck between the metal to be welded and a flux coated consumable electrode.

The fluxes are mostly made from mineral components and cover the hot weld deposit and protect it from the environment. The solidified glassy product, slag should be removed by chipping or with a wire brush.

Gas metal arc welding (GMAW):
This process is also referred to as metal inert-gas (MIG) welding uses an uncoated continuous wire. The weld area is shielded from contamination by the gas that is fed through the welding torch.

The mode of metal transfer (spray, globular, short-circuiting, pulsed-arc) is varied by adjusting the amperage and the shielding gases used depending on the welding position and the type of joint.

Flux-cored arc welding (FCAW):
The shielding gases and slag are provided by the decomposing flux that is contained within the electrode. Auxiliary shielding is also used in certain instances where deeper penetration is needed.

Gas tungsten arc welding (GTAW): 
Also known as tungsten inert-gas (TIG), the process uses a non-consumable electrode. The shielding gas is again fed through the welding torch.

Welding may be accomplished without the addition of filler metal, which is advantageous especially for thin walled parts.

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