About heat treating

steel is hardende by heating it to a specific temperature for a specific amount of time and then quenching it in a prescribed manner. Different type of steel must each be heat treated in a specifice way. After heat treating, the blade is very hard and brittle. It must then be draw tempered in a lower temprature oven to give it some flexibility and bring to it is ideal rockwell hardness.proper heat treating is critical to making a good blade that is tough,durable and holds a good sharp edge. Improper heat treating can literally ruin a blade

from http://www.pknife.com

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