Welding Processes Taught at NRCC

Shielded Metal Arc Welding

 
  Welder using Shielded Metal Arc Welding process

Shielded Metal Arc Welding is the most common method of joining metals. “Stick” welding as it is commonly referred, is an arc welding process with the arc between a covered electrode and the weld pool. SMAW uses shielding from the decomposition of the electrode covering, and filler metal from the electrode. Using the SMAW process the welder can rapidly make high quality welds on various types of metals with varying thicknesses in all positions with excellent uniformity.

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Gas Metal Arc Welding

 
  Welder uing Gas Metal Arc Welding process

Also known as “Mig” welding, this process, because it uses an arc between a continuous filler wire and the weld pool, is extremely fast and economical. GMAW is often used to do production work due to its speed, versatility, and ease of use. The process is used with shielding from an externally supplied gas and is used to weld on a variety of metal thicknesses from thin-gauge metal to heavy plate metal in any position.

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Gas Tungsten Arc Welding

 
  Welder using Gas Tungsten Arc Welding process

Gas Tungsten Arc Welding – Often referred to as “Tig” welding, can be used on almost any metal. An arc between a non-consumable electrode (tungsten) and the weld pool produces high quality welds that require little or no post weld finishing. This process uses a shielding gas to protect the weld pool.

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Flux Core Arc Welding

 
  Welder using Flux Core Arc Welding

Flux Cored Arc Welding – The flux cored arc welding process is similar to the GMAW process and uses the same type of equipment as GMAW. FCAW also uses an arc between a continuous filler wire and the weld pool. This process is used with shielding gas from a flux contained within the tubular electrode, and can also use an externally supplied gas (dual shield wire).

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Air Carbon Arc Gouging

 
  Air Carbon Arc Gouging

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