Wear repair on mild steel: use stainless filler?

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I've noticed some mild steel wearing in certain locations due tocontact with harder parts (yes, lubricated, but still wearing).So, I thought, could I use a stainless filler rod and a TIG rig to fill in thewear spots and get a longer lasting fix?My concerns are:* Will the stainless filler rod bond properly with the mild steel base?* Do I set the TIG parameters (gas flow, current) any differently than   if I were repairing it with a mild steel filler?If this sounds OK, what stainless should I use?  Or, should I use4130 filler (also hard, right)?  It doesn't have to be stainless, butI know stainless is tougher wearing, so it came to mind quickly.
Reply:What kind of machine are these parts from? Do you need to machine the mild steel part after welding. What is the harder of the two parts made out of? You can get TIG rod in alloys that are for putting hard surfaces on things that wear.Yup
Reply:A hardened assembly (RC50?) is moving in a mild steel track that's developingsome wear grooves.  Yes, I will need to grind it down flat after adding the filler,but that shouldn't be a problem, you can grind anything, even grade 8 bolts. :-)I like that filler you suggest--what is it called?  Hardening or facing filler?
Reply:Hardfacing rod, I have only seen the TIG stuff being used. I have have always used stick for hardfacing, and depending on the application you may want to consider stick welding. How much area do you have to cover?If its not much area than TIG would be ok, if its alot of area and you can protect the surrounding equipment than stick or even MIG would be faster.What are you working on?Yup