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Final report on Contract No 7215-PP/330, 1 July 1999 to 31 December 2001.

An ideal solution to keep the mill working at the highest capacity, while respecting the thermal requirements for the whole product mix, should be to have a flexible cooling system between the roughing mill and the finishing mill. Therefore the water pillow cooling (WPC) technology developed at CRM was experimented with for the cooling of plates (maximal cooling power of 5 MW per square metre, to be regulated by the cooling water flow rate). The same cooling technology can be applied to the cooling of thick bars. Within this project, compact cooling equipment was designed, built and tested in the normal operating conditions of the hot strip mill of Sidmar at the exit of the last roughing stand.

Industrial trials have shown that a temperature drop of the bar is controllable up to 70°C despite the fact that the cooling efficiency at the top face of the bar was about twice as low as at the bottom face. Both industrial trials and laboratory trials have shown that the use of barcooling has no significant effect on the mechanical properties for a wide range of steel grades and for a temperature drop up to 70°C. Barcooling strongly improved the surface quality of the hot-rolled strips by reducing the rolled-in-scale defects. Furthermore, the use of the barcooling device has increased the productivity of the hot-strip mill by 2-3%.

Additional information

Authors: DE PAEPE A, CRM Gent, Zwijnaarde (BE);HERMAN J C, CRM Gent, Zwijnaarde (BE);SIMON P, CRM Gent, Zwijnaarde (BE);CORNET X, CRM Gent, Zwijnaarde (BE);NOVILLE J F, CRM Gent, Zwijnaarde (BE);MOERKERKE J, Sidmar, Ghent (BE);BOS B, Sidmar, Ghent (BE);VAN POECKE P, Sidmar, Ghent (BE);DE ZUTTER G, Sidmar, Ghent (BE);DE CLERCQ F, Sidmar, Ghent (BE)
Bibliographic Reference: EUR 20500 EN (2002), pp.50. Euro: 7.00
Availability: EUR-OP reference: KI-NA-20500-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-4386-3
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