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It's more than the steel being a fairly good conductor of heat, that leaves a lot to interpretation, it's how good is air as a conductor of heat. That's what 's conducting the heat to the steel in an electric oven. Now if you were talking about a molten salt tank it would take almost no time to bring the steel up to temperature for quenching.
You are right though about learning the equipment that you have and tweeking the process go get your blades the way you want them.
Doug
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If you're not making mistakes then you're not trying hard enough
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