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Influence of Mould Flux Properties on Early Solidification in Continuous Casting
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology , 2010. , v, 47 p.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-41545ISBN: 978-91-7415-720-8 (print)OAI: oai:DiVA.org:kth-41545DiVA: diva2:444533
Public defence
2010-10-07, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20110929Available from: 2011-09-29 Created: 2011-09-29 Last updated: 2011-09-29Bibliographically approved
List of papers
1. Thoughts about the Initial Solidification Process during Continuous Casting of Steel
Open this publication in new window or tab >>Thoughts about the Initial Solidification Process during Continuous Casting of Steel
2002 (Swedish)In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 31, 292-297 p.Article in journal (Other academic) Published
Abstract [en]

The initial solidification during continuous casting is very important for the surface quality of the strand. Oscillation marks are formed by the movement of the mould. One mainly distinguishes between two different types of marks, namely folding marks and overflow marks. The formation of these can be described by the heat flow and the surface tension balance. A theoretical analysis outlining the most important parameters controlling the formation of these marks is presented. A metallographic analysis of the formation was also performed. The theory and observations have been used to analyse the effect of casting speed and oscillation frequency on the formation of different types of marks. It is shown that a meniscus is formed at the top of the growing shell. The maximum height of the meniscus determines the ideal distance between the marks. The mould frequency is related to this height. A frequency that is far from ideal causes overflow marks and folding marks with macrosegregation and cracks. The distance between the marks is, in such cases, not constant. The depth of the marks is calculated from the heat flow and the surface tension balance.

Keyword
Continuous casting, Oscillation marks
National Category
Metallurgy and Metallic Materials Materials Engineering
Identifiers
urn:nbn:se:kth:diva-24600 (URN)10.1034/j.1600-0692.2002.00519.x (DOI)000178481100002 ()
Note
QC 20110203Available from: 2010-09-18 Created: 2010-09-18 Last updated: 2017-12-12Bibliographically approved
2. Experimental Study of the Formation of Oscillation Marks in Continuous Casting of Steel Billets
Open this publication in new window or tab >>Experimental Study of the Formation of Oscillation Marks in Continuous Casting of Steel Billets
2002 (English)In: 4th European Continuous Casting Conference, Oct 14-15 2002, Birmingham,England, 2002Conference paper, Published paper (Other academic)
Keyword
Continuous casting, Steel, Oscillation marks
National Category
Metallurgy and Metallic Materials Materials Engineering
Identifiers
urn:nbn:se:kth:diva-24601 (URN)
Note
QC 20110203Available from: 2010-09-18 Created: 2010-09-18 Last updated: 2011-09-29Bibliographically approved
3. Oscillation Mark Formation on Continuously Cast Copper
Open this publication in new window or tab >>Oscillation Mark Formation on Continuously Cast Copper
2003 (English)Report (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH, 2003. 15 p.
Series
Trita-MG, ISSN 1104-7127 ; 2003:02
Keyword
Continuous casting, Copper, Oscillation marks
National Category
Metallurgy and Metallic Materials Materials Engineering
Identifiers
urn:nbn:se:kth:diva-24602 (URN)
Note
QC 20110203Available from: 2010-09-18 Created: 2010-09-18 Last updated: 2011-09-29Bibliographically approved
4. Oscillation Mark Formation on Continuously Cast Stainless Steel and Carbon Steel Slabs
Open this publication in new window or tab >>Oscillation Mark Formation on Continuously Cast Stainless Steel and Carbon Steel Slabs
2003 (English)Report (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH, 2003
Series
Trita-MG, ISSN 1104-7127 ; 2003:03
Keyword
Continuous casting, steel, slabs, oscillation marks
National Category
Materials Engineering Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-24603 (URN)
Note
QC 20110203Available from: 2010-09-18 Created: 2010-09-18 Last updated: 2011-09-29Bibliographically approved
5. Theoretical Study of Oscillation Mark Formation in Continuous Casting Processes
Open this publication in new window or tab >>Theoretical Study of Oscillation Mark Formation in Continuous Casting Processes
2003 (English)Report (Other academic)
Series
Trita-MG, ISSN 1104-7127 ; 2003:04
Keyword
Continuous casting, Oscillation marks
National Category
Materials Engineering Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-24604 (URN)
Note
QC 20110203Available from: 2010-09-18 Created: 2010-09-18 Last updated: 2011-09-29Bibliographically approved
6. Determination of the interfacial tension between commercial steel grades and mould flux slags by experiments and by empirical models
Open this publication in new window or tab >>Determination of the interfacial tension between commercial steel grades and mould flux slags by experiments and by empirical models
(English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344XArticle in journal (Other academic) Submitted
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-41538 (URN)
Note
QS 2011 QS 20120326Available from: 2011-09-29 Created: 2011-09-29 Last updated: 2017-12-08Bibliographically approved
7. Experimental study of interfacial phenomena between commercial steel and mould flux slag: influence of oxide additions to the mould flux
Open this publication in new window or tab >>Experimental study of interfacial phenomena between commercial steel and mould flux slag: influence of oxide additions to the mould flux
(English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460Article in journal (Other academic) Submitted
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-41540 (URN)
Note
QS 2011 QS 20120326Available from: 2011-09-29 Created: 2011-09-29 Last updated: 2017-12-08Bibliographically approved
8. X-Ray Observation of Gas Evolution, Flotation, and Emulsification of Molten Carbon Steel Immersed in Mold Flux
Open this publication in new window or tab >>X-Ray Observation of Gas Evolution, Flotation, and Emulsification of Molten Carbon Steel Immersed in Mold Flux
2011 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 42, no 2, 265-268 p.Article in journal (Refereed) Published
Abstract [en]

At two interfacial-tension measurement experiments with the same experimental conditions, steel samples and mold flux samples of the same compositions were melted in crucibles from the same batch. During the first experiment, the steel drop melted far below its liquidus and then was emulsified. At the second experiment, the steel melted at the expected temperature but did not emulsify. The difference that can be identified is the mass of the steel samples.

Identifiers
urn:nbn:se:kth:diva-34366 (URN)10.1007/s11663-011-9475-8 (DOI)000290688100002 ()2-s2.0-79953046159 (Scopus ID)
Note
QC 20110613Available from: 2011-06-13 Created: 2011-06-07 Last updated: 2017-12-11Bibliographically approved

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