Anyone Here Ever Build A Sword Sized Heat Treating Kiln? Just would like to see what you got, and how to make one.
Posted 18 February 2012 - 09:51 AM
Posted 18 February 2012 - 10:30 AM
Since Dee is an ABS JS here's a link to a WIP on a sword tempering furnace she built and posted elsewhere. I don't know if she has ever tried to use it for full heat treating so you might pm her to find out.
Good Luck and be safe,
Posted 18 February 2012 - 06:09 PM
Posted 22 May 2012 - 12:06 PM
So the bigger the gas fired forge the more variation in temperature both within and across time as the thermocouple regulates firing of the propane. I like the salt better since it is relatively a large mass providing heat by conduction rather than convection. Knives heat faster in salt than they do in a gas atmosphere. Oxidation is kept to a minimum.
A heat treating oven that approximates the size of a 50 gallon barrell would likely mean that it is hotter in some places than others (center of chamber, sides, side opposite burners, etc.). If you make the circumference smaller (10 inch inside diameter over the 18 or 20 inches approximate diameter of a 50 gallon drum) you have to be concerned with the location of the burners and how many burners along the length of say 36 inches for a sword. Insulation becomes critical to reduce cold spots. Smaller heat treat forges have fewer problems with temperature variation but they are never as precise as the salt. If you want precision, go salt.
Posted 22 May 2012 - 08:38 PM