Control of Mechanical Properties by Monitoring Microstructure
- Prof. Dr. P. Neumann4,
- Dr. D. Allen5 and
- Prof. Dr. E. Teuckhoff6
Published Online: 5 JAN 2006
Copyright © 2000 Wiley-VCH Verlag GmbH, Weinheim
Steels and Materials for Power Plants, Volume 7
How to Cite
Löffler, H. U., Döll, R., Lang, B., Sörgel, G., Holtheuer, U. and Zouhar, G. (2000) Control of Mechanical Properties by Monitoring Microstructure, in Steels and Materials for Power Plants, Volume 7 (eds P. Neumann, D. Allen and E. Teuckhoff), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606181.ch10
Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
ABB Asltom Power UK Ltd., Cambridge Road, Whetstone, Leicester LE9 GLH, United Kingdom
Siemens AG, Postfach 3240, 91050 Erlangen, Germany
- Published Online: 5 JAN 2006
- Published Print: 27 JUN 2000
Print ISBN: 9783527301959
Online ISBN: 9783527606184
- steels for power plants;
- materials for power plant;
- control of mechanical properties;
- monitoring of micro structure
The microstructure monitor involves a method to compute mechanical properties of hot rolled steel from process data and the chemical composition of the steel. The underlying microstructure model monitors grain size and degree of recrystallization at each point in the mill. The physical model is complemented by an artificial neural network for the calculation of mechanical properties. The evolution of microstructure during finishing and cooling is described in the model. Processes such as static and dynamic recrystallization, grain growth and austenite-ferrite transformation are all part of the calculation.
Results from hot rolling mills are presented. A comparison of measured and calculated values for the tensile strength of low-carbon manganese and niobium microalloyed steels illustrate the accuracy of the microstructure monitor.
Several major advantages result from the on-line application of the monitor system. In addition to the facility of quick release of strips after rolling and the saving of costs involved in quality control measurements, even process parameters could be changed to achieve desired mechanical properties of the product.