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An investigation of the Temperature Distribution of a Thin Steel Strip during the Quenching Step of a Hardening Process
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Dalarna Univ, Dept Mat Sci & Engn, SE-79188 Falun, Sweden.;Voestalpine Precis Strip AB, Res & Dev Dept, SE-68428 Munkfors, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. (Enheten processer)ORCID iD: 0000-0002-2109-3731
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. (Enheten processer)ORCID iD: 0000-0003-1919-9964
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. (Enheten processer)
2019 (English)In: Metals, ISSN 2075-4701, Vol. 9, no 6Article in journal (Refereed) Published
Abstract [en]

The dimension quality of the strip within the hardening process is an essential parameter, which great attention needs to be paid. The flatness of the final product is influenced by the temperature distribution of the strip, specifically across the width direction. Therefore, based on physical theories, a numerical model was established. The temperature of the strip for the section before the martensitic transformation was objected in the predicted model by using a steady state approach. In addition an infrared thermal imaging camera was applied in the real process in order to validate the results and to improve the boundary conditions of the numerical model. The results revealed that the temperature of strip decreased up to 250 degrees C within the area between the furnace and the quenching bath. This, in turn, resulted in significant temperature difference across the width of the strip. This difference can be up to 69 degrees C and 41 degrees C according to the numerical results and thermal imaging data, respectively. Overall, this study gave a better insight into the cooling step in the hardening process. In addition, this investigation can be used to improve the hardening process as well as an input for future thermal stress investigations.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 6
Keywords [en]
continuous hardening process, martempering, heat transfer, numerical modelling, CFD
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-255579DOI: 10.3390/met9060675ISI: 000475356500059Scopus ID: 2-s2.0-85070722589OAI: oai:DiVA.org:kth-255579DiVA, id: diva2:1340471
Note

QC 20190805

Available from: 2019-08-05 Created: 2019-08-05 Last updated: 2019-10-04Bibliographically approved

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Andersson, Nils A. I.Tilliander, Anders

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