🔨 English Blacksmith: Case-Hardening, Carbon Diffusion and Quench Lab

Work a village smithy's hearth: pump the bellows to set the fire, pack a horseshoe in charcoal, and watch carbon diffuse into hot iron by Fick's second law with an Arrhenius diffusivity. Quench it and read the case depth and the hardness profile. Virtual, illustrative model; not heat-treatment instructions.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install