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Advantage and disadvantage of GTAW

Advantage of GTAW welding:

Concentrated Arc-Permits pinpoint control of heat input to the workpiece resulting in a narrow heat-affected zone.

No slag- No requirement for flux with this process; therefore no slag to obscure the welder’s vision of the molten weld pool.

No sparks or Spatter-No transfer of metal across the arc. No molten globules of spatter to contend with no sparks produced if material being welded is free of contaminants.

Little Smoke or Fumes- Compared to other arc-welding processes like stick or flux cored welding, few fumes are produced. However,the bas metals being welded may contain coatings or elements such as lead, zinc,copper, and nickel that may produce hazardous fumes. Keep your head and helmet out of any fumes rising off the workpiece. Be sure that proper ventilation is supplied, especially in a confined space.

Welds more metals and metal alloys than any other arc welding process.

Good for welding thin material.

Good for welding dissimilar metals together.

Disadvantages of GTAW welding:

Slower travel speeds than other processes.

Lower travel speeds than other processes.

Lower filler metal deposition rates.

Hand-eye coordination is a required skill.

Brighter UV rays than other processes.

Equipment costs can be higher than with other processes.

Concentrations of shielding gas may build up and displace oxygen when welding in confined areas-ventilate the area and/or use local forced ventilation at the arc to remove welding fumes and gases. If ventilation is poor, wear an approved air- supplied respirator.

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