Welding Processes
Welding Processes
(OP)
I have read some book i see TIG is usually best demanding properties. Why that?
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RE: Welding Processes
Second point is that GTA welds are shielded by gas versus slag (molten flux). This eliminates potential inclusions and slag pockets resulting in high quality GTA weld deposits.
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RE: Welding Processes
A GMAW arc in spray transfer will give you good penetration and uses basicly the same filler metal but has a larger arc, a larger heat input and a larger HAZ.
Bob
RE: Welding Processes
I'm looking at a narrow groove, automatic orbital, GTAW deposited weld cross section and I can assure you that the HAZ is not smaller than similar weld deposits made with GMAW spray arc that I have examined. HAZ size is also be affected by the total heat input - travel speed being a primary variable and travel speed with GTAW, especially manual GTAW, is quite slow compared to other processes.
RE: Welding Processes
Distortion (shrinkage, angular) also increases with manual GTAW.