10-15-2012, 03:48 AM
It's easy enough to build a sword length one, but you would have to deal with the issue of uneven heating patterns, I would use multiple smaller sized torch heads, but to get around the spot heating issue you need to fit an intermediate divider between the flame chamber and the blade chamber, then it would need to be blocked off at the back and have a door fitted to the blade chamber.
It's called a "Muffle Furnace" the commercial ones are rarely gas fired nowadays, but they use a lot of electricity to power them, so not at all suitable for home use in the US as you really want a minimum 32 amps 3 phase @415 Volts to power it, maybe as much as 100amps for one big enough to heat treat a sword. So gas works but you would need to build one as there is no way you could buy it.
Rick
It's called a "Muffle Furnace" the commercial ones are rarely gas fired nowadays, but they use a lot of electricity to power them, so not at all suitable for home use in the US as you really want a minimum 32 amps 3 phase @415 Volts to power it, maybe as much as 100amps for one big enough to heat treat a sword. So gas works but you would need to build one as there is no way you could buy it.
Rick
Whatever it is, do it today, Tomorrow may not be an option and regret outlasts fatigue.