Heat-treat recipes, core principles, equipment guidance, and troubleshooting for hardening and tempering knife steel at home or in a small shop. Two working paths lead through it — pick yours:
🔥 THE FORGE PATH
Magnet, colors and shade — the path for simple carbon steels and no kiln budget.
🔥 Heat Treating Without a Kiln — start here
🔁 Normalizing & Thermal Cycling — the forge smith’s grain control
🌊 Differential Hardening & the Hamon — clay, edge quenches, soft spines
🛢️ Quench Oils Explained — the oil must match the steel
⚡ THE KILN PATH
Programs, real soaks and foil — the path that unlocks stainless and the precision steels.
⚡ Kiln Heat Treating: Programs, Soaks & Protocols — start here
🛒 Heat Treat Oven Buyer’s Guide — choosing the machine
🥪 Plate Quenching Explained — why stainless gets squeezed, not dunked
🛢️ Quench Oils Explained — for the kiln’s oil-steel days
Steels this path unlocks: AEB-L, MagnaCut, 14C28N, O1 at its best
Either path: the Complete Heat Treat Guide is the foundation read; Toughness-First Heat Treat covers field-knife targets; send-out services run the protocols for you; and the Temper Color Chart and Quench Oil Speed Chart live on the calculators shelf. Every steel’s exact numbers are on its database page.
All Heat Treat Guides
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