Diy Propane Heat Treat Oven. It is important to not though that if you overheat the pbc, it will stick like mad to the blade and can pit it if you really overshoot the temps. Most of it will pop off in the quench and what doesn't is easily cleaned up with a scotchbrite pad and hot water.
Paint color set descending direction. Make sure you've got a drill bit as large as, or slightly larger than, the burner on your torch. Our ovens feature novus temperature controllers for easy configuration of setpoints, carlos gavazzi 2 pole ssr with actively cooled heat sink for reliability, thermal protection “push to reset” (for element and ssr overheat protection), heat enable switch on the panel cover (for quick element shut down, load / unload of oven), control power switch on the panel cover (shuts down oven, starts auto cool down.
Swish it around a bit until it's cooled throughout to below 150°f.
There also needs to be a hinge and a frame to hold the door on. I had even bought more tanks and an additional burner to try to heat the knife in open air. I have two out of date propane tanks for the forge body. The multiple failed attempts at propane heat treated had me frustrated.