Details

Title

Numerical Model for Solidification Zones Selection in the Large Ingots

Journal title

Archives of Foundry Engineering

Yearbook

2015

Numer

No 4

Publication authors

Keywords

Theory of crystallizations ; Thermal gradient field ; Constrained solidification ; Unconstrained solidification

Divisions of PAS

Nauki Techniczne

Description

Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.

Abstract

A vertical cut at the mid-depth of the 15-ton forging steel ingot has been performed by curtesy of the CELSA – Huta Ostrowiec plant.

Some metallographic studies were able to reveal not only the chilled undersized grains under the ingot surface but columnar grains and

large equiaxed grains as well. Additionally, the structural zone within which the competition between columnar and equiaxed structure

formation was confirmed by metallography study, was also revealed. Therefore, it seemed justified to reproduce some of the observed

structural zones by means of numerical calculation of the temperature field. The formation of the chilled grains zone is the result of

unconstrained rapid solidification and was not subject of simulation. Contrary to the equiaxed structure formation, the columnar structure

or columnar branched structure formation occurs under steep thermal gradient. Thus, the performed simulation is able to separate both

discussed structural zones and indicate their localization along the ingot radius as well as their appearance in term of solidification time.

Publisher

The Katowice Branch of the Polish Academy of Sciences

Date

2015[2015.01.01 AD - 2015.12.31 AD]

Type

Artykuły / Articles

Identifier

ISSN 2299-2944

DOI

10.1515/afe-2015-0085

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