Hi,
I'm interested in giving mig brazing a go for some small bike frame repairs and maybe making some custom racks. This is a thin wall application and being as fillet brazing is long established within the bike frame building history I thought this might be a alternative to getting some gas fora oxy propane torch I have access to.
See here for intro.
http://www.mig-welding.co.uk/brazing.htm
I've got 3 questions hopefully someone can help me out with.
Q1. The guide above use pure argon for shielding gas. Could you use the same flux you would use for gas brass brazing? Or would a normal bottle of argon / co2 mix be ok? What would the co2 do to the braze? As I understand it the flux is there to stop oxidation and so shouldn't argon / co2 stop that just as well as pure argon?
Q2. I can only find mig brazing wire here
http://www.r-techwelding.co.uk/welding_equipment/Mig_Brazing_Wire
I guess the copper content is why it is so expensive. Does anyone know anywhere I could source smaller reels.
Q3. If non of the above is possible I will get the oxy propane back in action, this will require new hose but being as the regulators have been stood ideal for some time are they serviceable in any way, or is this something I would have to send off for, or is there many companies that would test them? I don't want to buy new regulators if they are easily serviceable and tested.
I'm interested in giving mig brazing a go for some small bike frame repairs and maybe making some custom racks. This is a thin wall application and being as fillet brazing is long established within the bike frame building history I thought this might be a alternative to getting some gas fora oxy propane torch I have access to.
See here for intro.
http://www.mig-welding.co.uk/brazing.htm
I've got 3 questions hopefully someone can help me out with.
Q1. The guide above use pure argon for shielding gas. Could you use the same flux you would use for gas brass brazing? Or would a normal bottle of argon / co2 mix be ok? What would the co2 do to the braze? As I understand it the flux is there to stop oxidation and so shouldn't argon / co2 stop that just as well as pure argon?
Q2. I can only find mig brazing wire here
http://www.r-techwelding.co.uk/welding_equipment/Mig_Brazing_Wire
I guess the copper content is why it is so expensive. Does anyone know anywhere I could source smaller reels.
Q3. If non of the above is possible I will get the oxy propane back in action, this will require new hose but being as the regulators have been stood ideal for some time are they serviceable in any way, or is this something I would have to send off for, or is there many companies that would test them? I don't want to buy new regulators if they are easily serviceable and tested.
