Got busy the last few days and knocked upa quick hair dryer air fed coal forge. And I must say, for 30 minutes work, it
can reach high enough temperatures to literally melt carbon steel into mush.. which although was a mistake and a learning curve from leaving some scrap steel I was playing with in too long does make it possible for me to now smelt and cast brass!
SImple metal helium canister I had halved to make bbqs, but slotted back together, cut out a chimney hole and an air feed tube hole.
Excuse the firey picture, this was taken as the moist coal and wood was burning off before I could start actually using the hot coals.
Anyway, I have a bunch of old English files of good steel and although I've made them into knives before, I've never altered the existing heat treatment other than to temper them down. And I couldn't reshape them from straight to curved etc.
here are my first 3 basic blades from files. Left is a curved knife for a friend, was a slender but thick steeled file and is slightly inspired by oriental curved belt knives. I only forged in the tang as the original file tang kind of melted off on my first try lol. Middle is a slightly curved stick tang multi purpose knife bashed from a larger file. And lastly is a small thick file that I curved over as best I could considering my set up and is a single bevel/chisel edge mushroom knife!
As you can see my 'anvil' is a sledge hammer sunk into a plank of 2x4". Works just fine for now too.
A quick profiling and shaping and some bevels etc..
I left enough meat on the edge as I hear the hardening temperature can distort or even melt thinner steel areas. And heated to non magnetic, dunked in cooking oil and then left in water once cooled enough.
Then something bad happened..
I was doing some extra grinding to tidy the profiles and bevels etc when the longest curved blade
tip snagged on the inner wheel of my angle grinder flap disc, causing it to be flung back really hard into my hand. It passed through my leather kevlar lined gloves and into my paw pretty deep. I had to pull it out..
So although I got some scale and black crud removed from the other blades, this one has to be revisited before I temper it and the others.
Incase you want to see what happened..
The cut doesn't look bad there, but the tang of the long knife went into my hand about a cm and hit bloody hard! I'm going in for an xray tomorrow to make sure nothing is broken (feels fine to me) and to check there is no debris or kevlar fibres etc in my meaty wound.
Stay tuned for the rest. I will be winging the long knife with whatever handle material. The simple forged blade into soemthing a little nicer but still rustic to match and finally the mushroom knife in some antler!
Think I'll hand finish the ins and outs of the 3 blades with files and sandpaper while my hand heals.