Community Research and Development Information Service - CORDIS


Final report on Contract No 7215-PP/004, 1 July 1997 to 31 December 2000

This collaborative, multinational project involving Corus UK, Corus IJmuiden, ISPAT-Hamburger Stahlwerke and Sidenor I+D, was aimed at the development of an optimum strategy to minimise segregation in the billet casting route. Besides the study of specific technologies designed to minimise segregation during billet casting, the effect of process variables on segregation and their interaction with the technologies identified were investigated. The two process variables that were observed to have a significant improvement on central segregation were casting with low superheat and using a submerged pouring practice. Thermal soft reduction, final EMS and mechanical soft reduction were shown to have a positive benefit on central segregation, but their application at the ideal conditions at the core of the billet was difficult due to caster process variations. The tundish capacity was observed to limit the injection rate of cored wire coolant and consequently control of superheat. By far the most successful technique investigated was that of intense secondary cooling. Corus UK, Corus IJmuiden and Sidenor all observed an improvement in the centreline segregation and ISPAT-HSW was able to show improvements in segregation by further development of their intense cooling set-up. Intense secondary cooling is technology recommended for the optimal strategy to minimise central segregation during the billet casting of high carbon steel grades.

Additional information

Authors: LUDLOW V, Corus UK Ltd, Middlesborough (GB);THIELE M, ISPAT - Hamburger Stahlwerke, Hamburg (DE);CIRIZA J, Sidenor I+D, Basauri (ES);LARAUDOGOITIA J J, Sidenor I+D, Basauri (ES);VAN DER KNOOP W, Corus NL BV, IJmuiden (NL)
Bibliographic Reference: EUR 20299 EN (2002), pp.264. Euro: 39.60
Availability: EUR-OP reference: KI-NA-20299-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3444-9
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