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Development of an asymptotics-based numerical model for the formation and evolution of air gaps in the vertical continuous casting of alloys
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Casting of Metals.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Casting of Metals.
2014 (English)In: TMS2014 143rd Annual Meeting & Exhibition: Annual Meeting Supplemental Proceedings, 2014, 339-346 p.Conference paper, Published paper (Refereed)
Abstract [en]

The formation of an air gap at the mould-metal interface in vertical continuous easting has long been known to have a detrimental effect on the efficiency of the process, and has therefore! attracted many attempts at mathematical modelling and multi-dimensional numerical simulation. However, a recent approach has used asymptotic techniques to derive a quasi-analytical thermomechanical model that captures the essential coupling characteristics: that the formation of the air gap affects the heat transfer, whilst the heat transfer affects the stresses that lead to the formation and evolution of the air gap. In this contribution, we report on preliminary attempts to develop that model, which was for the casting of pure metals, to describe the casting of alloys.

Place, publisher, year, edition, pages
2014. 339-346 p.
Keyword [en]
Air-gap formation, Alloys, Vertical continuous casting
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-146706ISI: 000354941300042Scopus ID: 2-s2.0-84899707680ISBN: 978-111888972-5 (print)OAI: oai:DiVA.org:kth-146706DiVA: diva2:724776
Conference
143rd Annual Meeting and Exhibition, TMS 2014; San Diego, CA; United States; 16 February 2014 through 20 February 2014
Note

QC 20140613

Available from: 2014-06-13 Created: 2014-06-13 Last updated: 2016-05-30Bibliographically approved
In thesis
1. On the surface quality of continuously cast steels and phosphor bronzes
Open this publication in new window or tab >>On the surface quality of continuously cast steels and phosphor bronzes
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis work concerns about the importance of the cast surfaces, surface phenomenon such as the formation of the oscillation marks and exudation and related defects including cracks and segregation that happened during the continuous casting. All of the investigated materials were collected during the plant trials while an in-depth analysis on these materials was performed at the laboratory scale with certain explanations supported by the schematic and theoretical models. The work consists on different material classes such as steels and phosphor bronzes with a focus on the surface defects and their improvements. In order to facilitate the theoretical analysis which could be capable of explaining the suggested phenomenon in the thesis, a reduced model is developed which required lesser computational resources with lesser convergence problems.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. 80 p.
Keyword
Continuous Casting, Steels, Ni-based alloy, Peritectic, Phosphor Bronzes, Simulation and Modeling
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering; Industrial Engineering and Management; Metallurgical process science
Identifiers
urn:nbn:se:kth:diva-187718 (URN)978-91-7729-019-3 (ISBN)
Public defence
2016-06-09, Kollegiesalen, Brinellvägen 8, SE-10044, KTH-Campus, Stockholm, 14:00 (English)
Opponent
Supervisors
Projects
Oscilation mark formation during continous casting of steel
Funder
Swedish Energy AgencyVINNOVAHelge Ax:son Johnsons stiftelse
Note

QC 20160527

Available from: 2016-05-30 Created: 2016-05-27 Last updated: 2016-05-30Bibliographically approved

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