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High performance hot rolling process through steel grade-dependent influencing of the scale formation and flexible descaling control (Hiperscale)
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High performance hot rolling process through steel grade-dependent influencing of the scale formation and flexible descaling control (Hiperscale)

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HiPerScale developed an integrated, energy efficient and flexible approach to influence oxidation, decarburisation, overall descalability and surface quality for steel grades suffering from oxidation processes. The focus was on primary scale formation and various investigations were done to improve the knowledge on scale formation conditions, development, application and investigation on scale conditioning coatings as well as on improvement of descaling technologies including nozzle development. To improve the existing knowledge and to enable steel industry to conduct their own studies procedures for characterisation of primary scale formation including decarburisation, descalability and descaling efficiency were compiled and key production indicators were defined. Investigations on scale formation with focus on scale-metal interface and morphology led to a better understanding of the scale formation behaviour and its conditioning. Lab investigations showed that coatings can minimise the scale formation in terms of weight gain by 23 to 40 %, but the results are strongly depending on the coatings and the steel grade. Decarburisation could be suppressed almost totally which was shown in both lab and industrial trials. The coatings may impair the descalability of the reheated steel depending on the steel grade and process conditions. Studies on the descaling processes led to approaches for improved descaling strategies (concept of pre-cooling) and improvement of descaling nozzles although the latter topic needs continuous improvements. Finally guidelines (Hints and a list of Do’s and Don’ts) were compiled to support the steel companies in integrating the results for influencing scale formation and behaviour into their plants.
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ISSN 1831-9424
ISBN 978-92-79-98327-6
DOI 10.2777/624530
Numero di catalogo KI-NA-29535-EN-N
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ISSN 1831-9424 ISBN 978-92-79-98327-6 DOI 10.2777/624530 Numero di catalogo KI-NA-29535-EN-N
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