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Heat Treating and Metallurgy Discussion of heat treatment and metallurgy in knife making.

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Old 04-16-2012, 11:08 AM
Doug Lester Doug Lester is offline
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If you are working with a steel that has more than 77 points of carbon in it, at least something above 80 points, then a soak between lower and upper critical temperatures is required to get the carbon from the carbides into solution. You will want to keep the temperature below the upper critical temperature, which varies by carbon content but is pretty close to the lower critical temperature at the carbon levels we use, to reduce grain growth.

Learning to do a soak on the blade in a forge without overheating and growing grain is just a skill that you will have to learn. Don't let it buffalo you, it's not all that hard. Most of us do not have regulated ovens or molten salt pots. Just keep with the simpler steels. Meaning avoid the more complex air quenching steel, this includes stainless, unless you invest in the equipment or decide to send your blades out for heat treatment.

Doug


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