Preheating of aluminum using oxyfuel torch
Preheating of aluminum using oxyfuel torch
(OP)
Hi all, please find the attached page. Its a snapshot from welding metallurgy book of sindo kou. It shows the chemical reactions and products in different envelopes.
My question is can i use the outer envelope which releases moisture/water as a product for preheating of aluminum? If not then what should be the preferred technique for preheating of aluminum?
Thanx all in advance.
My question is can i use the outer envelope which releases moisture/water as a product for preheating of aluminum? If not then what should be the preferred technique for preheating of aluminum?
Thanx all in advance.





RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
http://www.lincolnelectric.com/en-us/support/weldi...
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
Mike Halloran
Pembroke Pines, FL, USA
RE: Preheating of aluminum using oxyfuel torch
http://www.esabna.com/us/en/education/blog/porosit...
RE: Preheating of aluminum using oxyfuel torch
Kind suggestion on its use is what i sought
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
Heat treatable aluminum alloys overage if they are held at temperature while welding. Preheating only makes the problem worse.
The heat affected zone of the nonheat treatable aluminum alloys are softened and extended by preheating. Like the heat treatable alloys, the mechanical properties are degraded in the HAZ.
Preheat aluminum, not a good idea. Instead, crack up the welding current.
Best regards - Al
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
Same could be the case with preheating. Though, chemically and mechanicaly cleaned the base material but oxide layer forms immediately and it could be hydrated by moisture from flame.
What do u guys think?
RE: Preheating of aluminum using oxyfuel torch
RE: Preheating of aluminum using oxyfuel torch
Seems like that - the burned soot, the hydro-carbon in the fuel, and the hydrogen in the water as a combustion product are re-introducing what you're trying to remove.
Electric heat? I have not used it on welding aluminum, but I've welded less AL the others.
RE: Preheating of aluminum using oxyfuel torch
"Seems like that - the burned soot, the hydro-carbon in the fuel, and the hydrogen in the water as a combustion product are re-introducing what you're trying to remove. "
Yes, this is what i thought and literature said.