Objectif In welded structures requiring the use of thick (30-100 mm) plates, the steels used today are still chiefly of the heat-treated type. The extension of controlled rolling to the production of thick plate appears an increasingly attractive solution on account of the metallurgical and economic benefits it permits. Nevertheless, controlled rolling has not yet been extensively used by European Steel-makers in the production of thick components, and the use of such products has not so far been established. Unlike normalizing, controlled rolling can impair structural uniformity as the thickness increases: the greater the final thickness, the greater the effects of temperature gradients and deformation of the microstructure. The most recent literature shows that no solution has so far been found to the problem of defining to what extent the lack of structural uniformity influences the toughness properties in the case of polygonal ferrite structures. The experimental part of the work will be carried out on steels of the CMnNb type with a low Mn content (~ 1%), a very low S content (< 0.002 %) and inclusions altered by Ca treatment. This work will be carried out with the cooperation of Nuova Italsider (Taranto). Programme(s) ECSC-STEELRES 7C - Medium-term guidelines (ECSC) "technical steel research", 1986-1990 Thème(s) D2 - Rolling: flat products Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur CENTRO SVILUPPO MATERIALI SPA Contribution de l’UE Aucune donnée Adresse Via di Castel Romano 100/102 00128 ROMA EUR Italie Voir sur la carte Coût total Aucune donnée
