Title

Microstructure & Flow Stress – Relating Experiment to Mill Experience

Microstructure & Flow Stress – Relating Experiment to Mill Experience

Authorship

SILK, N. J.

SILK, N. J.

I am this author

DOI

10.5151/2594-5327-C00178-2837-2845

Downloads

Abstract

Laboratory techniques such as plane strain compression (PSC) testing can provide very reliable flow stress data and allow accurate quantification of the independent effects of temperature and strain rate. Modern data-logging systems capture large amounts of mill information (e.g., temperature and mill separating force), and self-adaptive algorithms enable the basic setup model outputs to be "learned" by online control models. However, these self-adaptive algorithms often lack physical meaning and may not account for time-dependent effects such as microstructural changes. The work evaluates the impact of both dynamic and static microstructural events on steel processing. Recognizing time-dependent effects as real and significant in the mill is essential for inclusion in both short-term and long-term control models. The second part of the work addresses the challenge of correlating laboratory-measured flow stress data with mill-measured information such as roll separating force. Discrepancies are attributed to uncertainties when laboratory assumptions are applied to real mill conditions.

Laboratory techniques such as plane strain compression (PSC) testing can provide very reliable flow stress data and allow accurate quantification of the independent effects of temperature and strain rate. Modern data-logging systems capture large amounts of mill information (e.g., temperature and mill separating force), and self-adaptive algorithms enable the basic setup model outputs to be "learned" by online control models. However, these self-adaptive algorithms often lack physical meaning and may not account for time-dependent effects such as microstructural changes. The work evaluates the impact of both dynamic and static microstructural events on steel processing. Recognizing time-dependent effects as real and significant in the mill is essential for inclusion in both short-term and long-term control models. The second part of the work addresses the challenge of correlating laboratory-measured flow stress data with mill-measured information such as roll separating force. Discrepancies are attributed to uncertainties when laboratory assumptions are applied to real mill conditions.

Keywords

microstructure, flow stress, control model, rolling mill, strain rate

microstructure, flow stress, control model, rolling mill, strain rate