Back-calculation of flow curves and width control during cold rolling
The main objective of this project was to improve the set-up for cold rolling mills. A model for better force set-up was developed for this, based on back-calculation of flow curves. Plane strain compression tests with strain rate jump allowed modelling of the flow curves of a broad range of steels, including high-strength steels. It was demonstrated that with the physical-based roll force model, it was possible to detect bad allocation of material or deviations in the HSM process. It was also shown that the determination of the flow curve of an unknown material is feasible with the model. A second model was developed for improving the set-up for the prediction of strip width. First, a reliable width measurement system (in contact with the strip) was designed, manufactured, installed and verified. A statistical analysis was performed to determine the importance of the process parameters on width deviations in stable (strip centre) and non-stable (head and tail end) rolling conditions. The model to predict the width variation is based on a statistical approach and demonstrates good agreement between measured and predicted strip width reductions.
Bibliographic Reference: EUR 22458 EN (2007), 87 pp. Euro: 15
Availability: Katalogue Number: KI-NA-22458-EN-S The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
ISBN: ISBN: 978-92-79-04994-1
Record Number: 200719197 / Last updated on: 2007-07-05
Original language: en
Available languages: en