Best shielding gas mixture????
Best shielding gas mixture????
(OP)
We are robot welding mild steel with .045 wire, and having a great deal of trouble with porosity. Our gas flow is good, its not a drafty area, Plus checked our system for leaks. all seems to be good. The Japanese suggest using more CO2, will this help?





RE: Best shielding gas mixture????
If these are ok, it has to be the shielding gas. Check the dew point of the gas and make sure that it is a welding grade with the proper dew point.
RE: Best shielding gas mixture????
are you using hard wire or flux cored wire
remember....too much gas flow can cause a venturi action and suck in contaminating air into your welding gas shield area
RE: Best shielding gas mixture????
RE: Best shielding gas mixture????
http://www.weldreality.com/MIG_welding_gases.htm
RE: Best shielding gas mixture????
RE: Best shielding gas mixture????
Do you have any cooling water leaks?
Soap all your gas lines and fittings, may have a pin hole or thread leak.
Is your liner good?
Are you using Anti-spatter? To much is bad.
Any fans or vents in the area?
Leave a bowl of milk for the gremlins.