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Académie
Welding
Welding Red Seal Certification
GTAW (TIG) Welding & Special Materials
Vérification des connaissances
GTAW (TIG) Welding & Special Materials
Vérification des connaissances
Vérification des connaissances
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When GTAW welding titanium, why must shielding gas be applied to the back side of the weld (back purging) as well as the front?
A
Back purging prevents distortion of the titanium workpiece
B
Titanium oxidizes on both the weld face and the hot root side - oxygen and nitrogen contamination causes embrittlement
C
Titanium requires a DCEP back-purge arc for oxide cleaning on the root side
D
Back purging cools the root pass quickly to prevent cracking
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