Normalising carbon steel

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nebben838

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Sep 20, 2020
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Hi everyone. Im wandering if there would be any issues if I was to clamp my carbon steel blades between aluminium plates after each normalising cycle? I find that during the first normalising cycle is when the blade will warp if it's going to warp. Will it speed up the cooling rate to much or does it not matter?

Thanks,
Ben.
 
Personally, I wouldn't worry about warping between normalizing cycles. Some people will quench carbon steel and then immediately clamp it between a flat surface to prevent warping. That seems to me to be easier than trying to keep the blade completely straight through your cycles. My 0.02, hope it helps.
 
Alden covered it nicely - don't worry about warping until final quench, then clamp between plates after quench to "help" prevent warp.
 
And to add, depending on the exact steel and thickness, you might end up completely hardening rather than what you intended to do. I think 1/16" O1 tool steel might just completely harden with plates.
 
i would normalise it a couple of times, then straighten it while hot in the last cycle.

another thought; could you clamp the blade between bars of steel and normalise the entire block? would take longer to heat and cool, but keep it straight
 
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