Publication detail
A numerical optimization of heat transfer in a system a plate casting - mold - surroundings
KAVIČKA, F. ŠTĚTINA, J. KATOLICKÝ, J. MAUDER, T. KLIMEŠ, L.
English title
A numerical optimization of heat transfer in a system a plate casting - mold - surroundings
Type
conference paper
Language
en
Original abstract
The solidification and cooling of a casting, and the simultaneous heating of the mold is described by the Fourier equation. An original three-dimensional (3D) numerical model of the temperature field of a system, comprising a plate casting, the mold and the surroundings, had been assembled and used to optimize the production technology of a vertically cast steel plate. The accuracy of a numerical model depends not only on the spatial and temporal discretization, but also on the accuracy with which the thermophysical properties of all materials entering the system are determined. The temperature field of this plate was analyzed with different angles of widening in its cross-section (in the range 0° to 4.4°). From the slanted side, the plate was either insulated or uninsulated. Plastizol was used as the insulator. An uninsulated plate has a calculated optimum angular widening of 3°. A widening of 2° is the minimum angle from which internal defects (e.g. shrinkage cavities) begin to disappear. The insulated plate has an optimum angle of widening of 2°. Using calculations, it is possible to predict that the plate itself will have the same internal quality with a widening of 3° after crystallization without insulation, as a 2° widening has with insulation. The knowledge gained in this study can lead to the reduction of the volume of liquid metal used, and also to the lowering of machining costs.
English abstract
The solidification and cooling of a casting, and the simultaneous heating of the mold is described by the Fourier equation. An original three-dimensional (3D) numerical model of the temperature field of a system, comprising a plate casting, the mold and the surroundings, had been assembled and used to optimize the production technology of a vertically cast steel plate. The accuracy of a numerical model depends not only on the spatial and temporal discretization, but also on the accuracy with which the thermophysical properties of all materials entering the system are determined. The temperature field of this plate was analyzed with different angles of widening in its cross-section (in the range 0° to 4.4°). From the slanted side, the plate was either insulated or uninsulated. Plastizol was used as the insulator. An uninsulated plate has a calculated optimum angular widening of 3°. A widening of 2° is the minimum angle from which internal defects (e.g. shrinkage cavities) begin to disappear. The insulated plate has an optimum angle of widening of 2°. Using calculations, it is possible to predict that the plate itself will have the same internal quality with a widening of 3° after crystallization without insulation, as a 2° widening has with insulation. The knowledge gained in this study can lead to the reduction of the volume of liquid metal used, and also to the lowering of machining costs.
Keywords in English
Solidification, temperature field, numerical model, thermophysical properties, an angle of widening, insulation, optimization
Released
05.09.2018
Publisher
Česká slévárenská společnost
Location
Divadelní 6, 657 34 Brno
ISBN
978-80-02-02818-5
Book
Sborník přednášek XXIII. celosttní konference Výrova a vlastnosti oceli na odlitky a litiny
Pages from–to
76–84
Pages count
9
BIBTEX
@inproceedings{BUT149793,
author="František {Kavička} and Josef {Štětina} and Jaroslav {Katolický} and Tomáš {Mauder} and Lubomír {Klimeš},
title="A numerical optimization of heat transfer in a system a plate casting – mold – surroundings",
booktitle="Sborník přednášek XXIII. celosttní konference Výrova a vlastnosti oceli na odlitky a litiny",
year="2018",
month="September",
pages="76--84",
publisher="Česká slévárenská společnost",
address="Divadelní 6, 657 34 Brno",
isbn="978-80-02-02818-5"
}