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HomeInnovative non-contact, non-destructive sensors for automatic detection of surface and internal defects in hot continuously cast products (NDTCASTING)
Innovative non-contact, non-destructive sensors for automatic detection of surface and internal defects in hot continuously cast products (NDTCASTING)
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This was a cooperative project involving VDEh-Betriebsforschungsinstitut GmbH (BFI), Tata Steel RD & T Teesside Technology Centre (formerly Corus), ArcelorMittal R & D Technological Centre — Centro Desarollo Tecnológico and Scuola Superiore Sant’Anna (SSSA). The focus was to develop innovative non-contact, non-destructive sensors for automatic detection of surface and internal defects in hot continuously cast products. BFI has developed a technique, based on the ultrasound pulse-echo method. BFI’s technique uses non-contact EMATs to both generate and receive ultrasonic signals. BFI has investigated the use of the developed phased-array system for surface and sub-surface defects. The inspection system can find defects on steel products, even if the surface is rough and contains oscillation marks and scale oxide. Tata Steel has carried out work to develop a prototype Laser-EMAT system. This has been installed on the pilot caster at Tata Steel. Extensive trials have been carried out on cold steel samples below the Curie temperature with good results but hot steel trials have been of limited success. The Laser-EMAT device has been equipped by SSSA with complete software for data visualisation and analysis and BFI has also developed the necessary tools for ultrasound data interpretation. ArcelorMittal worked in the extension of the application field of its CH system. As a result, defects such as very thin and zigzag cracks can now be reliably detected. A system to check the quality during and after scarfing was developed and integrated in the plant. A software tool for tracing slabs through the mill was developed, allowing downstream evaluation of the defects.
- Published:
- Corporate author(s): Directorate-General for Research and Innovation (European Commission)
- Personal author(s): Flohr, G ; Oberhoff, D ; Feldmeyer, B
- Themes: Industrial research and development , Basic metals industry, steel industry
- Subject: cast-iron , industrial research , iron and steel industry , iron and steel product , materials technology , research and development
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| ISSN 1831-9424 | ISBN 978-92-79-22241-2 | DOI 10.2777/31693 | Catalogue number KI-NA-25092-EN-N |
- Released on EU Publications:
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