Community Research and Development Information Service - CORDIS


This project was designed to improve the surface quality of carbon and low alloy steel products by identifying optimum processes for different steel grades. A diverse range of laboratory tests, pilot plant and works-based trials was devised, involving design and construction of equipment or enhancements to existing facilities. Alternative oxidation models (e.g. linear, parabolic and mixed) have been reviewed. Rolling and descaling trials at Corus STC and MEFOS showed primary and finish descaling to be essential, whereas intermediate descaling can and sometimes should be omitted. Thermobalance tests at Corus STC showed that, with increasing temperature, the significance of surface condition (as-cast or machined) diminishes whereas the furnace oxygen level becomes increasingly important. MEFOS developed a quick method of determining tertiary scale thickness using an electronic technique based on the eddy current principle. For investigations of scale adherence, Sidenor I+D adapted their Gleeble machine for tests with controlled bending and, with a water jetting facility, investigations of hydraulic descaling. Industrial trials showed that the effect of hydraulic descaling on product quality diminishes with increasing reduction ratio during rolling. BFI transported samples through a walking beam furnace. As-cast scale containing 50 % residual casting powder did not affect scale development during reheating. Coatings were either detrimental or uneconomic. A 'big thermobalance', taking 1.5 kg plate samples, gave results consistent with tests at Corus STC and IRSID. IRSID monitored scale spallation using acoustic emission. Their HSM scale simulation model was extended using thermobalance test data. A water cooling simulator was used to mimic cooling on the run-out table. The solid state transformations occurring in scale during cooling of a coil were determined. These models and procedures provide a basis for industrial scale trials, for example, to determine the optimum

Additional information

Authors: MARSTON H F, CORUS UK Limited, Rotherham (UK);RATCLIFFE R, CORUS UK Limited, Rotherham (UK);STEER M A, CORUS UK Limited, Rotherham (UK);BUGDOL M, CORUS UK Limited, Rotherham (UK);GONZALES J R, Sidenor I+D, Basauri (ES);LLANOS J M, Sidenor I+D, Basauri (ES);NISKA J, MEFOS, Luleå (SE);SJÖRGEN B, MEFOS, Luleå (SE);KUHLMANN M, Betriebsforschungsinstitut (BFI), Düsseldorf (DE);KLIMA R, Betriebsforschungsinstitut (BFI), Düsseldorf (DE);WIDMANN F, Neue Maxhütte Stahlhütte GmbH (closed);LEPRINCE G, Arcelor (IRSID), Maizières-lès-Metz (FR);PICARD M, Arcelor (IRSID), Maizières-lès-Metz (FR)
Bibliographic Reference: EUR 21427 EN (2005), 225pp. Euro: 35
Availability: Katalogue Number: KI-NA-21427-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 92-79-00082-9
Record Number: 200618478 / Last updated on: 2005-12-15
Original language: en
Available languages: en