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Abstract

This project is aimed at the development and implementation of systems for online transverse temperature control for the micro-structural homogeneity of the hot strips.

Two different steel grades were investigated, silicon iron (Centro Sviluppo Materiali) and high-strength steel (MEFOS), aiming at determining the maximum acceptable temperature gradient across the strip width to avoid micro-structural differences between the centre and the edges of the strip.

Further, the two partners assessed the effect of different thermal actuators to minimize thermal disuniformity across the strip width, where CSM analysed the effect of an edge heater in front of the finishing mill and MEFOS the effect of edge shielding at the run out table.

Mathematical models were developed to find the relationship between the hot-rolling parameters and the final properties of the material, and an automatic system has been realized to control the functioning of an edge heater installed in front of the finishing mill.

Results coming from this project mainly show that the two steel grades have different tolerances in term of acceptable temperature gradient, silicon iron being more sever. Also the possibilities offered by the two methods to improve thermal uniformity across the strip width, where the fist one (edge heater) concerns the bar at entry of the finishing mill and the second one (edge sealing) concerns the strip along the run out table. table.

Additional information

Authors: TOLONEN J, MEFOS, Lules, (SE);SANFILIPPO F, Centro Sviluppo Materiali, Rome (IT);FORTUNATI S, Centro Sviluppo Materiali, Rome (IT);MATERA S, Centro Sviluppo Materiali, Rome (IT)
Bibliographic Reference: EUR 19870 EN (2001), pp. 96. Euro: 14.50
Availability: Available from EUR-OP sales agent URL: http://eur-op.eu
ISBN: ISBN 92-894-1435-9
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