Bronze welded to steel
Can silicon bronze be welded to steel?
No. It can be silver brazed, but not welded.
Inertia welding might be an option. Probably not something you're set up for in the garage, though.
The shipyard in Alabama can "weld" aluminum & steel (bonding would probably be a better term). I have a piece I've used in class for "show & tell". However, 99.999999% of the time welding refers to the joining of materials via heat that have the same element as the base.
Originally Posted by dkaustin
the questions a bit vauge as Si bronze adequately describes a brazing rod but you can weld copper to steel, its a bit of an art but here goes, TIG, 1.2mm Deoxidised copper rod, helium sheilding gas, Helium and helium/argon mixtures - adding helium to argon will raise the temperature of the arc. This promotes higher welding speeds and deeper weld penetration. Disadvantages of using helium or a helium/argon mixture is the high cost of gas and difficulty in starting the arc, lots of amps the weld pool does either solid or liquid so downhill is a chalenge [ what we are welding is a copper tip onto a coaxial steel lance about 100 foot long], the steel melts also so it is a weld, seems to hold too, oxy goes through it at 70,000 m3/min at mach2 ish, bronze and the Cu we do are mostly similar, Si bronze may splatter a bit, phos bronze a bit better, you need a preheat, and a controlled cool or she will crack due to the different shrinkage rates, keep the torch preferentialy on the steel and moving, 1/4 " aim 250/300 amps
btw prepare to get hot! the last tip i put on [10" and about 160 lbs took 3 headsheilds and an apron made from morgan chrome blanket, the shiny stuff furnace gear is made from, they have a machine now i beleive]
mark [and glad i'm in a nice air conned lab now!]
Last edited by boslab; 03-07-2010 at 08:01 PM.
You can tig braze solid silicon bronze material to steel, using a silicon bronze filler rod.
DC, straight argon.
I have done it a bunch. Its a braze, not a weld, but its very strong.
I think i would on reflection have to agree, its a braze if there is a ferrous joined to a non ferrous, i'm not at all sure what i'd call the alloy that lives between the two, mess comes to mind, but i have to conceed that you can only weld metals from the same family, i.e. copper to copper with copper filler = weld, the same with disimmilar filler = braze or soldered joint.
Originally Posted by Ries