Rknight, I understand your question, but what you don't understand is that Cobalt based alloys were designed with high wear uses in mind. These materials are often used in high wear situations like, agitators, augers, ball mills, rock crusher bearings wich represent much higher wear than hardened steels can dish out.
These materials were designed with high wear in mind, so I don't think you need to worry about. Think about all the alloying elements you have in Stellite/Talonite: Nickel, Silicon, Iron, Manganese, Chromium, Molybdenum, Tungsten and Carbon, and of course, yours truly, Cobalt. This makes for high wear and temerature resistance.
Hope this helps