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Formation of the tin rich layer and inverse-segregation in phosphor bronzes during continuous casting
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallernas gjutning.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallernas gjutning.ORCID-id: 0000-0002-8318-1251
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallernas gjutning.
2015 (engelsk)Inngår i: Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu, The Minerals, Metals, and Materials Society, 2015, s. 15-22Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Continuous casting of the phosphor bronzes has been investigated experimentally and analyzed with the help of a thermo-mechanical model. The microscopic investigation shows the spread of the tin rich liquid at the chill surface cause by the formation of flow channels underneath the chill surface. Precipitation of the secondary phases has also been observed under some casting conditions. The macro segregation profile along the solidification thickness predicts a strong casting parameter sensitive inverse segregation. The simulation results show high compressive stresses at the surface of the cast during solidification. The flow channels depth and thermal stress coupled with microsegregation calculations shows the possibility of the pressure driven flow of tin rich liquid towards the chill surface during solidification. The experimental observation and calculated results show that the inverse segregation can be homogenized and decreased by controlling the casting parameter that defines the liquid pool depth into the mould.

sted, utgiver, år, opplag, sider
The Minerals, Metals, and Materials Society, 2015. s. 15-22
Emneord [en]
Continuous casting, Exudation, Inverse segregation, Thermal stress
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-170499DOI: 10.1002/9781119093367.ch3Scopus ID: 2-s2.0-84931297752ISBN: 9781119082385 (tryckt)OAI: oai:DiVA.org:kth-170499DiVA, id: diva2:839339
Konferanse
Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition, 15 March 2015 through 19 March 2015, Walt Disney World Orlando, United States
Merknad

QC 20150702

Tilgjengelig fra: 2015-07-02 Laget: 2015-07-01 Sist oppdatert: 2016-05-30bibliografisk kontrollert
Inngår i avhandling
1. On the surface quality of continuously cast steels and phosphor bronzes
Åpne denne publikasjonen i ny fane eller vindu >>On the surface quality of continuously cast steels and phosphor bronzes
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2016. s. 80
Emneord
Continuous Casting, Steels, Ni-based alloy, Peritectic, Phosphor Bronzes, Simulation and Modeling
HSV kategori
Forskningsprogram
Teknisk materialvetenskap; Industriell ekonomi och organisation; Metallurgisk processvetenskap
Identifikatorer
urn:nbn:se:kth:diva-187718 (URN)978-91-7729-019-3 (ISBN)
Disputas
2016-06-09, Kollegiesalen, Brinellvägen 8, SE-10044, KTH-Campus, Stockholm, 14:00 (engelsk)
Opponent
Veileder
Prosjekter
Oscilation mark formation during continous casting of steel
Forskningsfinansiär
Swedish Energy AgencyVINNOVAHelge Ax:son Johnsons stiftelse
Merknad

QC 20160527

Tilgjengelig fra: 2016-05-30 Laget: 2016-05-27 Sist oppdatert: 2016-05-30bibliografisk kontrollert

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