I am a welder by trade, blacksmith as a hobby. I make an occassional knife. I have enjoyed success with 5160. I have just forged a small knife from W1. I really liked the way it forged. My problem is I can't seem to sharpen it to a razor edge. I hardened it by submerging the blade except for the edge in water and heating with torch(a method I read here somewhere). My first sharpening produced edge chipping. I tempered again at higher temp. I tried to sharpen again, it still seemed to hard. I tempered again, this time at 500 degrees. I can still not get it to shave my arm. I once thought I could sharpen a piece of rebar and shave with it. I no longer think that way. . Any advice would be very much appreciated.