A customer brought in a cutter blade from a heavy duty medical lab waste disposal unit. They chop up plastic and glass bottles, syringes, test tubes and who knows what else. The cutting edge is worn about a quarter of an inch back from original surface (the edge is about 1-1/2 " long) They tell me these things are made from 8620 alloy and carburized to about 55Rc. New blade is 130.00.They are about 6" across, 4" thick(with a profile) and weigh about 7-8 lbs. They use about 1 per week.As soon as the case hardening goes, they wear quickly and the increased clearances allows trapping of the debris between the chamber wall and the blade. I'd like to give this a shot.It looks like a quick repair. Nothing too precise required. Seems more like tool and die welding with such small surface to work with, but I'd like to avoid heat treatment if at all possible. Haven't had much luck looking around the net for tig hardfacing rod or application information. Would appreciate any help with this question from this group. I'm truly impressed by the depth and breadth of the knowlege base found here. I was thinking along the lines of A-2 or M-2 tool steel tig rod, but not even sure where to go for that or even if it would work. I have some lincoln "faceweld" hardfacing stick rod that I could try, and some horse shoe borium. There are a number of these blades to play with, and I hope to come up with something servicable if possible.
Thank you and regards to all.
Lake