Quenching, Hardness Testing, Rockwell Hardness, Steel Hardening, Tempering, Knifemaking, Making a Knife edge hard, liquid quench, peanut oil, olive oil, motor oil, freshwater, saltwater, Knife Blade Design, Skinning Knife, Knife Prototype, Blade Profile, Grinding, Tool Steel, Carbon Steel, Shaping, Carburizing, Heat Treating, Quench.

Also, the following video is a good reference for heat treating processes including quenching, tempering, anealing, normalizing, hardness, toughness, etc...
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