Preferred Torch Brazing Flame Types 

I am beginner in welding, and excuse to add my answer which is according to what I KNOW (it is not necessarily correct). The answer is a "yes". A carbonizing flame is also called a reducing flame.

Yes, that's it! You might read "carbonizing" or "carburizing", it's the same idea: there is excess carbon in the flame, it's chemically active and it might be touching something chemically active (like a red-hot piece of iron), not only can it "REDUCE" oxides on the surface of that metal, but carbon can actually enter that hot metal and dissolve in it- for good or for ill! Personally I suspect that when using fluxes (which are glasses, made of melted oxides) that a reducing flame makes trouble because it reduces the FLUX! This is related to some bad experiences in glassblowing. I'm shooting for neutral or slightly oxidizing flame for flux-covered metals. I guess when in doubt neutral flame is always a good guess!

Here they might not say "carburizing" because I suspect that carbon doesn't dissolve in copper and silver alloys, maybe they don't BECOME carburized, so it doesn't come up in this industry? They can definitely reduce an oxidized surface!