Bifilm Inclusions in High Alloyed Cast Iron

Continuous improvement in the quality of castings is especially important since a cast without defects is a more competitive product due to its longer lifecycle and cheaper operation. Producing quality castings requires comprehensive knowledge of their production, crystallization process, and chemic...

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Autores principales: Stawarz, Marcin, Dojka, Malwina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200007/
https://www.ncbi.nlm.nih.gov/pubmed/34199751
http://dx.doi.org/10.3390/ma14113067
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author Stawarz, Marcin
Dojka, Malwina
author_facet Stawarz, Marcin
Dojka, Malwina
author_sort Stawarz, Marcin
collection PubMed
description Continuous improvement in the quality of castings is especially important since a cast without defects is a more competitive product due to its longer lifecycle and cheaper operation. Producing quality castings requires comprehensive knowledge of their production, crystallization process, and chemical composition. The crystallization of alloyed ductile iron (without the addition of magnesium) with oxide bifilm inclusions is discussed. These inclusions reduce the quality of the castings, but they are a catalyst for the growth of spheroidal graphite that crystallizes in their vicinity. The research was carried out for cast iron with a highly hyper-eutectic composition. Scanning electron microscopy and EDS analysis were used in the research. A detailed analysis of the chemical composition was also carried out based on the spectrometric method, weight method, etc. Based on the obtained results, a model of spheroidal graphite crystallization near bifilm inclusions was proposed. The surface of the analyzed graphite particles was smooth, which suggests a primary crystallization process. The phenomenon of simple graphite and bifilm segregation towards the heat center of the castings was also documented.
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spelling pubmed-82000072021-06-14 Bifilm Inclusions in High Alloyed Cast Iron Stawarz, Marcin Dojka, Malwina Materials (Basel) Article Continuous improvement in the quality of castings is especially important since a cast without defects is a more competitive product due to its longer lifecycle and cheaper operation. Producing quality castings requires comprehensive knowledge of their production, crystallization process, and chemical composition. The crystallization of alloyed ductile iron (without the addition of magnesium) with oxide bifilm inclusions is discussed. These inclusions reduce the quality of the castings, but they are a catalyst for the growth of spheroidal graphite that crystallizes in their vicinity. The research was carried out for cast iron with a highly hyper-eutectic composition. Scanning electron microscopy and EDS analysis were used in the research. A detailed analysis of the chemical composition was also carried out based on the spectrometric method, weight method, etc. Based on the obtained results, a model of spheroidal graphite crystallization near bifilm inclusions was proposed. The surface of the analyzed graphite particles was smooth, which suggests a primary crystallization process. The phenomenon of simple graphite and bifilm segregation towards the heat center of the castings was also documented. MDPI 2021-06-04 /pmc/articles/PMC8200007/ /pubmed/34199751 http://dx.doi.org/10.3390/ma14113067 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Stawarz, Marcin
Dojka, Malwina
Bifilm Inclusions in High Alloyed Cast Iron
title Bifilm Inclusions in High Alloyed Cast Iron
title_full Bifilm Inclusions in High Alloyed Cast Iron
title_fullStr Bifilm Inclusions in High Alloyed Cast Iron
title_full_unstemmed Bifilm Inclusions in High Alloyed Cast Iron
title_short Bifilm Inclusions in High Alloyed Cast Iron
title_sort bifilm inclusions in high alloyed cast iron
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200007/
https://www.ncbi.nlm.nih.gov/pubmed/34199751
http://dx.doi.org/10.3390/ma14113067
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