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Chemical Thermodynamics and Reaction Kinetics of Bayer Process Desilication Read chapter Read first chapter

2024 | OriginalPaper | Chapter

A Passive Approach to Butt Swell Management

Authors : S. R. Wagstaff, R. B. Wagstaff, B. Opdendries, A. Anestis, S. Pinis, G. Pashos, E. Xenos, A. Mavroudis

Published in: Light Metals 2024

Publisher: Springer Nature Switzerland

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Abstract

The thickening of the base of rolling slab ingots is colloquially known as butt swell. Because traditional DC casting systems are vertical and not truly continuous, this remains one of the remaining sectors of recovery loss in the casthouse and at the scalper. Butt swell is currently managed by using dynamic molds which adjust the mold bore as a function of casting recipe to deliver flat ingot profiles. In this paper, we analyze the metallurgical origin of butt swell in the DC casting process. Based on this analysis, a novel bottom block design is proposed which reduces the extent of the butt swell in the start-up regime of casting. Experimental results are reported in comparison to a standard reference case demonstrating a reduction in butt swell. Subsequent rolling trials also indicate additional scrap reduction in the flat rolling process.

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previous chapter Thermomechanical Modeling on AirSlip® Billet DC Casting of High-Strength Crack-Prone Aluminum Alloys
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Literature
1.
A. Hakonsen, (1997) A Model to Predict the Steady State Pull-In During DC-Casting of Aluminum Sheet Ingots In: Huglen, R.(ed) Light Metals 1997, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 675–682.
2.
H. G. Fjaer and A. Hakonsen, (1997) The Mechanism of Pull-In During DC-Casting of Aluminum Sheet Ingots In: Huglen, R.(ed) Light Metals 1997, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 683–690.
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C.H. Weaver, (1976) An Empirical Model to Explain Cross-Section Changes of D.C. Sheet Ingot During Casting In: Light Metals 1976, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 441–456.
4.
R. Lawrence, (1976) Cross-Section Shape Control of D.C. Sheet Ingot Using a Flexible Mold In: Light Metals 1976, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 441–456.
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P. Marchand et al., (1998) An Adjustable Mould for Sheet Ingot Production In: Welch, B.(ed) Light Metals 1998, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 1197–1201.
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A. Hakonsen et al., (2012) Square rolling slabs from the start of casting-the elimination of butt swell In: Suarez, C. (ed) Light Metals 2012, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 1113–1116.
7.
C. Cordill, (2020) Mold Shape Control for Direct Chill Ingot Casting In: Tomsett, A. (ed) Light Metals 2020, The Minerals, Metals, &Materials Society, Pittsburgh; Springer, New York, p. 887–891.
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S.R. Wagstaff (2015) Experimental observations and analysis of macrosecregation in rolling slab ingots. Massachussetts Institute of Technology M.S. Thesis.
9.
N.I. Svede-Shvets (1955) Transverse rolling of flat DC ingots with “Petrov’s Lock”, Aluminievye splavy, Moscow: Oborongiz, p. 294–302.
Metadata
Title
A Passive Approach to Butt Swell Management
Authors
S. R. Wagstaff
R. B. Wagstaff
B. Opdendries
A. Anestis
S. Pinis
G. Pashos
E. Xenos
A. Mavroudis
Copyright Year
2024
Book
Light Metals 2024

Print ISBN: 978-3-031-50307-8

Electronic ISBN: 978-3-031-50308-5

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-50308-5_129

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