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Author Wołczyński, Waldemar
Affiliation Institute of Metallurgy and Materials Science 25 Reymonta St., 30 059 Kraków, Poland
E-mail w.wolczynski@imim.pl
Author Ivanowa, Anna A.
Affiliation Institute of Applied Mathematics and Mechanics 74 Rosa Luxemburg St., 83-114 Donetsk, Ukraine
E-mail anna.ivanova@ukr.net
Author Kwapisiński, Piotr
Affiliation KGHM – Polish Copper Company 48 Skłodowskiej-Curie St., 59-301 Lubin, Poland
E-mail Piotr.Kwapisiński@kghm.com
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/2505
Abstract Metallographic studies performed on a cross-section of static steel ingot allow the observation of the following morphological zones: a) columnar grains (treated as austenite single crystals), b) zone of the columnar into equiaxed grains transformation (CET), and c) equiaxed grains at the ingot axis. These zones are reproduced theoretically by the numerical simulation. The simulation is based on the calculation of both the temperature field in a solidifying large steel ingot and the thermal gradient field obtained for the same boundary conditions. In particular, a new, innovative method based on the mathematical treatment applied to different functions resulting from both the aforementioned fields, are used in the structural predictions. The method developed, firstly for the massive steel ingot, has subsequently been applied to theoretically predict the structural zones in continuously cast brass ingots. In the case of continuously cast brass ingots three different morphologies were revealed experimentally: a) columnar structures, b) equiaxed structures preceded by the CET (sharp transition), and c) single crystals situated axially. The above model for the structural zones prediction is useful in plastic deformation design for: a) steel forging ingots assigned for the crankshafts applied to the ship engines, and b) continuously cast brass ingots assigned for special applications in the shipbuilding industry.
Pages 47-54
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords steel forging ingot
Keywords brass continuously cast ingot
Keywords structural transformations
Keywords crankshaft for ship engines
Keywords mathematical prediction of structural zones
Keywords numerical calculation of heat transfer
Title Mathematical predictions of brass/steel ingot structures
Type Original scientific article
References
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ISSN on-line 2392-0378
Language English
Funding No data
Figures 11
Tables 0
DOI 10.17402/313
Published 2018-12-18
Accepted 2018-10-17
Recieved 2018-03-26


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