Sorry for the lack of information... I was thinking that TIG could give me some more control, and if I intermittently laid down weld maybe would be able to keep the part cool.

I'll see if there is the potential of localized heat treatment on the cutting edges post welding... this may be the way.

I'm working on a piece right now where a hardened component will be welded to a carrier. The cutting edge of the hardened component will be about 1-2 inches away from the weld. Heat treating the assembly after welding is out of the question. As a hobbyist I currently have access to a MIG welder that...