Following from the chisels and planes you've made thread... I finally reached a point where lack of a back-bent chisel was stalling my table build to the point that I needed to do something about it.
One duplicate firmer chisel later...
Full Gallery.
Turned out to be relatively easy to forge the shape once I drew out the metal a little to thin it, which took rather longer than the shaping. I do wish I'd had a larger hammer though, as a lump hammer and 3lb ball pein hammer were not sufficiently powerful to make the most of each heat.
What surprised me was how much quicker the heats became once the metal was drawn out. The final heat to get the whole tool to a dull cherry red for hardening was difficult, and actually forced me to re-configure the firebrick "hearth" to direct the heat more evenly.
Taking the mill scale off with a wire brush, and cleaning up with flapwheel and mop before tempering allowed me to check for defects, and an electric fan oven at 220 for 3 hrs, then gradual cooling in the oven (still closed) until room temp delivered that lovely almost golden straw colour you see in the photographs.
It works really well for the task in hand, and takes a very keen edge, I'll definitely be experimenting more with this in the future.
Anyone Else for Forging?
One duplicate firmer chisel later...
Full Gallery.
Turned out to be relatively easy to forge the shape once I drew out the metal a little to thin it, which took rather longer than the shaping. I do wish I'd had a larger hammer though, as a lump hammer and 3lb ball pein hammer were not sufficiently powerful to make the most of each heat.
What surprised me was how much quicker the heats became once the metal was drawn out. The final heat to get the whole tool to a dull cherry red for hardening was difficult, and actually forced me to re-configure the firebrick "hearth" to direct the heat more evenly.
Taking the mill scale off with a wire brush, and cleaning up with flapwheel and mop before tempering allowed me to check for defects, and an electric fan oven at 220 for 3 hrs, then gradual cooling in the oven (still closed) until room temp delivered that lovely almost golden straw colour you see in the photographs.
It works really well for the task in hand, and takes a very keen edge, I'll definitely be experimenting more with this in the future.
Anyone Else for Forging?