James Allcorn, Bois D' Arc Forge, Paris, Texas
wrote on 11/3/06:
You said this was a project to enhance your TIG skills...
I'm trying to get better at TIG, and am asking a few techie questions, with SPECIFIC REFERENCE to MILD STEEL TIG WELDING.
1. Polarity? DCEP I suppose? They say not to use AC for steel.
2. Tungsten type? Thoriated or something else?
3. Tungsten diameter? 3/32" or what?
4. Amperage range? 150, more or less or what? How much do you increase amperage with finger/foot control?
5. Argon flow rate? 15 CFH or other setting on regulator?
6. Touch start or hi frequency arc start?
7. Do you use a deoxidized filler metal or just plain mild steel filler metal.
8. Any other tips would be appreciated.
My tungsten (thoriated) tends to oxidize soon after I start welding, it acts much like an ox/ac flame that is "oxidizing". Plus, the arc is erratic, wandering here and about. I use a pointed tip, ground on a "tungsten only" grinding wheel.
.thumbnail.JPG "Wave railing drawing")
TIG
James Allcorn, Bois D' Arc Forge, Paris, Texas
wrote on 11/3/06:
You said this was a project to enhance your TIG skills...
I'm trying to get better at TIG, and am asking a few techie questions, with SPECIFIC REFERENCE to MILD STEEL TIG WELDING.
1. Polarity? DCEP I suppose? They say not to use AC for steel.
2. Tungsten type? Thoriated or something else?
3. Tungsten diameter? 3/32" or what?
4. Amperage range? 150, more or less or what? How much do you increase amperage with finger/foot control?
5. Argon flow rate? 15 CFH or other setting on regulator?
6. Touch start or hi frequency arc start?
7. Do you use a deoxidized filler metal or just plain mild steel filler metal.
8. Any other tips would be appreciated.
My tungsten (thoriated) tends to oxidize soon after I start welding, it acts much like an ox/ac flame that is "oxidizing". Plus, the arc is erratic, wandering here and about. I use a pointed tip, ground on a "tungsten only" grinding wheel.
Appreciate comments and reply.