Infiltration Phenomena of Molten Powder in Continuous Casting Derived from Analysis Using Reynolds Equation. Part 2: Unsteady Analysis

A new type of model for the powder infiltration in continuous casting of steel is developed. Succeeding the previous report on a steady state analysis, this paper presents an unsteady model that uses Reynolds equation and the equation of the motion of the solidified shell as fundamental equations. T...

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Bibliographic Details
Published inISIJ International Vol. 46; no. 2; pp. 234 - 240
Main Authors Okazawa, Kensuke, Kajitani, Toshiyuki, Yamada, Wataru, Yamamura, Hideaki
Format Journal Article
LanguageEnglish
Published Tokyo The Iron and Steel Institute of Japan 2006
Iron and Steel Institute of Japan
Subjects
Applied sciences
continuous casting
Exact sciences and technology
lubrication
Metals. Metallurgy
mold oscillation model
powder infiltration
slag
mold oscillation model
powder infiltration
Oscillation
Slag
Continuous casting
Infiltration
Foundry
Lubrication
Modeling
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Summary:A new type of model for the powder infiltration in continuous casting of steel is developed. Succeeding the previous report on a steady state analysis, this paper presents an unsteady model that uses Reynolds equation and the equation of the motion of the solidified shell as fundamental equations. The analysis clarifies in details the cyclic movement of a solidified shell during mold oscillation. Mold powder can be infiltrated because the cyclic movement of the shell lags behind the mold oscillation. This provides a period when the mold/cast metal gap opens, during the downward motion of the mold. In this period, molten powder is infiltrated down into the channel. The model also clarifies that the powder infiltration is greatly influenced by two factors; the peak distance between solidified shell and mold wall during the oscillation, and the phase shift of the movement of solidified shell from the mold oscillation. Furthermore, the tendency of the powder consumption to decrease with increasing the powder viscosity can be easily understood through the mechanism of the powder infiltration derived from the analysis. Those results indicate that the model essentially reveals the unsteady behavior of powder infiltration during the mold oscillation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.46.234