|anyone have an old water heater I can scavenge?
||[Jul. 26th, 2011|02:21 pm]
I need a better heat treat setup for longer items. The best . . . well, I can't afford a molten salt pot setup right now, nor am I completely happy with the prospect of dealing with a homebrewed setup involving lava-temperature salt, electric wiring, and my own welding. What I can afford would be a setup I've used at a local hammer-in.|
Take a steel shell, they used an old water heater core with the galvanization stripped off (at least I hope they stripped it off before welding on it). Inside the shell was a layer of insulation, with a burner on the bottom, with an angle iron diffuser above the burner to even out the heat. The setup used a couple of thermocouples to measure the internal temperature, and was used to create an even, controlled heat. The temperature controller was a smith watching the thermocouple readings and adjusting the burner.
I have pretty much everything I'd need to make such a setup, except for the outer shell. I've looked into stainless ductwork (about $90 + shipping), and I could hit any of a number of local metal supply houses and see what they have in the way of 12" dia tubing, but free would be better. Anyone have an old water heater they're not using I could scavenge?