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Heat treating with a torch

When nitrogen is not available and with a furnace above 1,400°F filled with air, endo gas can be added per the following: Open the vestibule or outer door, and turn off the flame screen. Place a natural gas torch or lance at the
Some steel is too soft and can shear off if it isn't heat treated. Heat treating can turn the steel brittle, so tempering is the final step. ... Apply the heat, either by putting the metal into the forge or oven, or by heating it with the torch. With the torch, keep the metal in the hottest part of the flame to reduce the oxygen reaching the ...
The term "heat treating" is usually used to describe the process of hardening steel, though it can mean several things, including hardening, softening, and stress relieving. In this article, we'll use it to describe the hardening and tempering process for steel.
It's easy to build a bean can forge with a propane plumbers torch. You need about 1 linear foot of ceramic wool insulation and a metal coffee can or large bean can. For heat treat you don't need anything close to welding heat, so propane should be fine from that small of a torch. you can switch out to mapp if you have problems of not enough ...
Reheat entire blade length (keep it moving) very gently above a soft low heat propane or alcohol lamp, or gas stove flame until a light yellow color is observed forming on the surface and