Tempering the Blade

What happens here

After grinding, the blade needs tempering to reduce its brittleness. Preheat a conventional oven to 400°F. Once heated, place the blade inside the oven and bake it for one hour. After one hour, remove the blade and allow it to cool completely to room temperature. Repeat this heating and cooling cycle three to four times. This tempering process makes the steel tougher and less prone to breaking.

Goal: Toughen the hardened blade to prevent brittleness.