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

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Old 10-24-2013, 02:08 PM
Radar Radar is offline
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Join Date: Mar 2013
Posts: 51
Okay, a little bit of closure.

Went back to the machine shop for some more hardness testing. The machine is working properly now. Test results:
HRC 60 calibration sample: tests at 60
as-quenched test coupon tests at 61.5, a little low, but I'll take it
tempered coupon tests at 60
knife (mid tang) tests at 60.5

So, my numbers are a little low, could be that I didn't cool quickly enough in quench, moving the blade fore and aft in the bath may improve the outcome on future blades. I also suspect that thinner sections, closer to the cutting edge cooled faster than the thick section of the tang, resulting in slightly higher values, but I didn't want to mar a visible portion of the blade.

Thanks again for all the help, I'll post pictures once the knife is complete.

-Radar
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550, angle, blade, digital, edge, firebrick, flat, grinder, hand, heat, heat treat, hot, knife, made, material, newbie, pins, polish, post, scale, scratch, skinner, stabilizing, surface, tiny


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