3. Metallurgical mechanisms in hot rolling

3.1 Initial product features

We deliberately place ourselves in the case of cold or lukewarm charging (T < Ae ₃ , i.e. at a temperature below the equilibrium austenitization temperature). In line with the metallurgical recalls made, the crystallographic structure of the slab or billet before loading is of the centered cubic type. This structure is coarse, given the very low cooling rates typical of continuous casting. For the same reasons, the elements likely to precipitate (laws of thermodynamics) have precipitated, and...