metal fluxing

[irishwoodsman]

does anyone do metal fluxing anymore or is it a dieing art was just wondering:biggrin:

 

[irishwoodsman]

the shop i worked in as a teen used to have this torch that he could heat a journal to allmost red then turn a valve on and the torch would shoot out tiny flakes of metal and they would weld their selves to the metal, then he would return the journal down to specs, i may have the wrong name for it:thinking:

 

[Maglin]

I believe that is spray welding or that is what I've been told. I know it is used to fix undersized journals in worn crankshafts in the automotive world. Or used to anyways. I guess if you have a high dollar crank it would still be worth while to use this process.

 

[Tony Wells]

I have one of those powdered metal oxy-fuel torches. Works great for build up or hardfacing. Old school, but works.

 

[irishwoodsman]

there ya go thats the name of it, i didnt know if it was still used these day:biggrin:

 

[irishwoodsman]

i never had a chance to use it but i had watched the owner of the shop i worked in use on farm tractor axels where the race would set then he would turn it down heat the new race up in boiling oil then drop it on the axel when it cooled it was there to stay:thinking:

 

[nicky]

Hi all.
Metal fluxing as I knew it was for detecting cracks in castings. Cylinder blocks, heads etc. The process used metal fillings on the surface and then a magnetic field would be applied to each end of the casting. The metal filings would line up along the crack. This was usually called magna fluxing.
I am not sure if that was what was being referred to.
The building up of metal was called spray welding as on shafts etc..
Nick

 

[Tony Wells]

Trade name for spray welding buildup is metalizing. I did it for a while with a Metco wire gun. Oxy-Acetylene with 100 PSI compressed air, with a wire feeder built into the pistol grip gun. Rough up the surface, shoot a little nickel to bond it, then spray the alloy. Nowdays there are all sort of thermal spray coatings, including ceramic and carbide. Pretty specialized. Some use plasma to provide melt temp for the bonding matrix.

 

[HSS]

Metalizing is what they call it here at the paper mill, Tony. They still use it quite a bit especially to repair a pump shaft that might be hard to find and the bearing fits need to be built up and turned back down.
Pat

 

[Tony Wells]

I did it at the first job shop I worked in back in '77. Hydraulic rams, tons (literally) of electric motor shafts, end bells, various washed out pump cavity locations and shafts where the bearngs and seals would ride, and even a few brake drums. That didn't really work out well. Coolest things was aluminizing HD parts, like cylinders, anything cast iron. Beautiful stuff...almost pure white, and oil or anything else would burn right off. Did a few sets of headers for race cars engines too.

Kinda cool at night to take the gun outside and shoot it up in the air. Not so cool to be shooting it at each other....but them was the days!