Transcription of Plasma and TIG processes - saf-fro.com
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Plasma and TIG processes - saf-fro.com
Plasma andTIG processesAutomatic welding applicationsPerformance and highproductivity in boilerand pipe work2 Plasma and TIG processes used in automatic applicationsThe isotherm diagram opposite shows clearly that the energy distribution is strongly modifi ed within the Plasma arc: the 16 000 K to 24 000 K temperature zone is outsidethe nozzle, the 10 000 K to 16 000 K temperature zone is entirely transferred to the workpiece and causes the key hole eff ect (penetration of the workpiece).With a free arc (TIG process)the highest temperature zoneis too close to the cathodeto be 4 000 K and 10 000 K temperature zone is narrow in Plasma welding compared toTIG welding where the zone ismuch wider with characteristic bell shape.
Lincoln Electric have developed a variation of the TIG process to guarantee success in your automatic welding work. Variable polarity TIG …
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