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The technology of direct rolling developed in recent years presents features of particular interest, mainly in terms of the energy savings they make possible. The objective of the project is to bring to light eventual drawbacks presented by the DR process for certain categories of pre-selected steel, with an emphasis on macroscopic and microscopic segregations, as in the pre-heating of the slabs before the hot rolling. Three different types of steel were studied: an aluminium stabilised steel and an interstitial-free titanium steel for use in pressing, plus HSLA niobium steel for the production of sheets. The experimentation was organised around two principal activities: an analysis of the macro and micro-segregations in the unrefined castings and the hot-rolled sheets and a determination of the microstructural, textural and mechanical characteristics of the cold-rolled sheets obtained from the first two classes of materials studied. In addition to the experimental production of the materials, work was done on the modelling of the process of solidification designed to describe the phenomena of macro- and micro-segregation.

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Authors: ABBRUZZESE G, Centro Sviluppo Materiali SpA, Roma (IT);DI NUNZIO P E, Centro Sviluppo Materiali SpA, Roma (IT);MANIGRASSO M, Centro Sviluppo Materiali SpA, Roma (IT)
Bibliographic Reference: EUR 14257 IT (1992) 115 pp., FS, ECU 15
Availability: (2)
ISBN: ISBN 92-826-4723-4
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