Andrew T. ...
It is cast steel and weldable. The rollers are hardened. When I got the hammer in '92, one of the rollers had a flat spot. It was purchased for a specific job and I needed it running ASAP, so I just annealed it, welded it up with E70-S6 GMAW, ground and polished with scotch brite, case-hardened with acytelene soot, quenched at non-magnetic, and tempered to straw. I really wasn't expecting it to last, but it is still good after all these years!
I'm fairly sure the tracks are not hardened. Some steels are designed to work harden in use. Railroad track comes to mind. There are hardfacing electrodes with different properties designed to be used 'as welded' for the intended use. The question is which one?
One user on another thread rebuilt a beaudry and just ground off the high spots next to the grooves so tne rollers wouldn't drag. That's probably what I'll do rather than experiment. Hopefully someone will respond with a successful welding repair.
...OneAcre