Imaging the transformation of hot strip steel using magnetic techniques.

Sharif, E. and Bell, C. and Morris, P. and Peyton, A. J. (2001) Imaging the transformation of hot strip steel using magnetic techniques. Journal of Electronic Imaging, 10 (3). pp. 669-678. ISSN 1017-9909

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Abstract

In the production of steel strip, the temperature distribution and cooling rates along the mill run-out table have a significant effect on the steel microstructure and hence on final material properties, e.g., yield strength, tensile strength, and ductility. Noncontacting optical temperature sensors are typically used to implement feedback control of cooling, but water spray and surface emissivity irregularities can adversely affect these sensors. Ideally, the control of cooling path should account for the progress of dynamic transformation at required points rather than the strip temperature alone. There are several reports describing the use of magnetic sensors to monitor transformation. These sensors exploit the change in the electromagnetic properties as the steel progresses through transformation, for example the austenitic phase is paramagnetic and the ferritic phase is ferromagnetic below the Curie point. Previous work has concentrated on the operation and design of individual transformation sensors. This paper now describes the use of an array of electromagnetic sensors to image the progression of transformation along a sample steel block on a pilot scale industrial mill. The paper will describe the underlying physical principles, the design of the system, and present images showing the progress of transformation along one surface of the sample.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Electronic Imaging
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/ta
Subjects:
?? ATOMIC AND MOLECULAR PHYSICS, AND OPTICSCOMPUTER SCIENCE APPLICATIONSELECTRICAL AND ELECTRONIC ENGINEERINGTA ENGINEERING (GENERAL). CIVIL ENGINEERING (GENERAL) ??
ID Code:
20272
Deposited By:
Deposited On:
23 Dec 2008 09:11
Refereed?:
No
Published?:
Published
Last Modified:
19 Sep 2023 23:56