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General Characteristic of the Ductile and Compacted Graphite Cast Iron

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Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

Part of the book series: SpringerBriefs in Materials ((BRIEFSMATERIALS))

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Abstract

This section provides basic information about the spheroidal graphite cast iron (SGI) and compacted graphite cast iron (CGI) which belong to the group of high-quality cast iron. The classification of SGI and CGI according to ISO standards, their characteristics and the use of modern types such as ADI or Si–Mo were provided. The solidification path was shown, pointing to the important role of surface active elements in shaping the form of graphite. Models presenting eutectic grain growth in SGI and CGI were also described. It was also shown that in this connection, the main surface active elements (O and S) cause changes in the growth direction, and additionally, the so-called anti-spheroidizers, such as Ti, Bi, Zr, P and N, characterized by strong normal segregation, lower the liquidus temperature of the melt, thus creating the liquid channels that characterize CGI, which then stimulate the formation of compacted graphite. The issues of the number of eutectic grains, the cooling rate and the occurrence of defects in castings were raised. Finally the spheroidizing/compacting treatments have been shown along with the general scheme of the SGI/CGI preparation process.

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  1. AGH University of Science and Technology, Kraków, Poland

    Marcin Górny

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  1. Marcin Górny
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Correspondence to Marcin Górny .

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Górny, M. (2015). General Characteristic of the Ductile and Compacted Graphite Cast Iron. In: Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings. SpringerBriefs in Materials. Springer, Cham. https://doi.org/10.1007/978-3-319-14583-9_6

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