Community Research and Development Information Service - CORDIS


Final report on Contract No 7210-EA/205, 425, 331, 153, 1 July 1996 to 30 June 1999.

The aim of the research project is to improve the flatness quality of the strip during continuous annealing by analysing the origin of shape defects and by designing preventive action. Work has been carried out in the following directions:
- Trials of a sensor which showed to be able to monitor the thermal camber of hearth roll during service by means of high temperature optical fibres.
- Development and industrial application of models for calculating the evolution of temperature, stress and strain on the strip passing through the bright annealing furnace chamber, both during the heating and the fast-cooling phases.
- Modelling work in order to quantify the effects of non-centered strip, roll profile, incoming strip shape defects and roll misalignment.
- Development of a fold detection system combined with online incoming strip flatness measurement campaigns.

The results of the work have been to define optimised operating practices, roll profiles and parallelism criteria in order to reduce the risk of shape defects. The dependency between incoming strip shape and instability of strip steering as revealed by the online measurements has been used to build up a multivariable control system acting on strip lateral position and strip tension.

Additional information

Authors: SCHYNS M, CRM, Liège (BE);LUBRANO M, CSM, Rome (IT);ELIAS A, IRSID, Maizières-lès-Metz (FR);STOCKMEYER R, BFI, Düsseldorf (DE)
Bibliographic Reference: EUR 20095 EN (2002), pp.110. Euro: 16.00
Availability: EUR-OP reference: KI-NA-20095-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3150-4
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