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Metals 2015, 5(1), 239-255; doi:10.3390/met5010239

Graphite and Solid Fraction Evolutions during Solidification of Nodular Cast Irons

1
Veigalan Estudio 2010, Durango E-48200, Spain
2
Engineering, R&D and Metallurgical Processes Department, IK4-Azterlan, Durango E-48200, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo Lopez
Received: 8 January 2015 / Revised: 9 February 2015 / Accepted: 14 February 2015 / Published: 25 February 2015
(This article belongs to the Special Issue Advances in Solidification Processing)
View Full-Text   |   Download PDF [2144 KB, uploaded 25 February 2015]   |  

Abstract

Ductile iron casting production is strongly affected by austenite and graphite distribution obtained after the solidification process. At the same time it is accepted that solidification behavior can be considered as hypo-, hyper- or eutectic depending on the chemical composition; there is still some misconception about the growth evolution of graphite nodules and about solid fraction progression. Quenching experiments were performed on two different carbon equivalent compositions using inoculated and non-inoculated thermal analysis standard samples with the aim of freezing the existing phases at different solid fractions for each alloy. As a result of these experiments, it was possible to study the structural features found at different locations of each sample and at different stages of solidification. Additionally nodule evolution during the liquid-solid transformation was also analyzed and discussed regarding the chemical and processing characteristics of the prepared alloys. View Full-Text
Keywords: solidification; ductile irons; quenching experiments; graphite nodules; solid fraction; austenite solidification; ductile irons; quenching experiments; graphite nodules; solid fraction; austenite
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Natxiondo, A.; Suárez, R.; Sertucha, J.; Larrañaga, P. Graphite and Solid Fraction Evolutions during Solidification of Nodular Cast Irons. Metals 2015, 5, 239-255.

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