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During the conceptual study of the present activity state of the art information about direct rolling were contradictory and different development trends seemed to prevail. The research programme takes into account reheating slabs of different thickness (50 to 270 mm) that require different design and lay-out solutions. The problem of reheating slabs of traditional thickness (200-270 mm) has been tackled at the beginning; in this process a localized heating on the edges must be carried out, as the lateral faces are at a lower temperature than the slab centre where the thermal level is high enough to allow hot-rolling. Two possible design solutions have been worked out for a roller-hearth furnace capable of soaking the slab to conditions suitable for on line hot rolling. A comparison calculation with the alternative solution of electrical induction heating has also been carried out. Subsequently, the heating process undergone by thinner slabs from continuous casting machines of new generation has been taken into consideration. After a theoretical assessment of the process, a pilot furnace arrangement has been embodied. The pilot plant reproduces seven meters of roller way and the walking beam reheating zone and can handle a slab from between 50 and 90 mm thickness.

Additional information

Authors: MATTARINI A, Centro sviluppo materiali, Roma (IT);MILANI A, Centro sviluppo materiali, Roma (IT)
Bibliographic Reference: EUR 16780 IT (1997) 82pp., FS, ECU 15.00
Availability: Available from the (2)
ISBN: ISBN 92-828-1481-5
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