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WIRE WELDING WELDING WIRE Basic principle
Basic principle
The process can roughly be divided The can roughly be divided into process two distinctive methods into two distinctive methods depending on the wire being fed. depending on the wire being fed. GMAW – Gas metal arc welding and GMAW Gascored metal arc arc welding.
welding and
FCAW ––Flux
FCAW – Flux cored arc welding. GMAW – Gas metal arc welding GMAW – Gaswire.
metal arc welding uses a solid Depending on uses a solid Depending shielding gaswire.
the process canon shielding the process further begas divided into: can further be divided into: MIG welding (Metal Inert Gas) MIG welding (Metal(Metal Inert Gas) and MAG welding Active Gas).
and MAG welding (Metal Active Gas). In MAG welding we use a reactive In MAG we use (CO a reactive ) to shield gas like welding Carbon Dioxide 2 ) to shield gas like Carbon 2 the pool.
CarbonDioxide Dioxide(CO is suitable the pool.shielding Carbon Dioxide is suitable for arc when welding low for arc shielding whensteel.
welding low carbon and low-alloy carbon and low-alloy steel. In MIG welding we use inert gases In welding usegas inert gases likeMIG Argon.
Purewe inert shielding like Argon.
Pure inert gas shielding is essential for welding alloys of is essential magnesium, for welding alloys of aluminium, copper, aluminium, magnesium, copper, titanium, stainless steel, nickel alloys titanium, stainless and highly alloyed steel, steel. nickel alloys and highly alloyed steel. Gas mixtures of inert gases and Gas mixtures of(Argon inert gases reactive gases + CO2and ) are reactive gases (Argon +
CO2) are
regarded as MIG welding. regarded as MIG welding. Metal transfer with the GMAW Metal transfer withofthe process is by one twoGMAW methods: process is by one of two methods: Spray Arc or Short Circuiting Arc Spray Arc or Short Circuiting Arc
Solid wire Solid wire
Flux Flux
Tubular wire Tubular wire Flux tubular wire.
Flux tubular wire.
Wire drive rolls
Continuous wire Copper Contact tip
Nitrogen & Oxygen In Atmosphere
Shield Gas Concentric Gas
Nozzle
Protective Gas Umbrella
4.03 4.03
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