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Compacted Graphite Iron with the Addition of Tin

Gumienny G., Kurowska B., Fabian P.

Archives of Foundry Engineering

2020

Vol. 20, iss. 3

15--20

The paper presents the effect of tin on the crystallization process, microstructure and hardness of cast iron with compacted (vermicular) graphite. The compacted graphite was obtained with the use of magnesium treatment process (Inmold technology). The lack of significant effect of tin on the temperature of the eutectic transformation has been demonstrated. On the other hand, a significant decrease in the eutectoid transformation temperature with increasing tin concentration has been shown. It was demonstrated that tin narrows the temperature range of the austenite transformation. The effect of tin on the microstructure of cast iron with compacted graphite considering casting wall thickness has been investigated and described. The carbide-forming effect of tin in thin-walled (3 mm) castings has been demonstrated. The nomograms describing the microstructure of compacted graphite iron versus tin concentration have been developed. The effect of tin on the hardness of cast iron was given.

Ocena procesu odlewania i obróbki cieplnej stopowego staliwa konstrukcyjnego metodą analizy termicznej i derywacyjnej

Studnicki A., Kilarski J., Przybył M.

Archiwum Odlewnictwa

2006

R. 6, nr 19

315-322

W artykule przedstawiono fragment badań wytopów stopowego staliwa konstrukcyjnego (G32NiCrMo12-4) przeznaczonego na wielkogabarytowe elementy rurociągów tj. kolana, trójniki. Celem badań było określenie parametrów odlewania i obróbki cieplnej staliwa ułatwiające optymalny dobór technologii wytwarzania odlewów w warunkach wybranej odlewni staliwa.

In this paper the research fragment of constructional alloy cast steel (G32NiCrMo12-4) for large-size parts of pipelines (elbows, T-pipes) has been presented. The goal of research was definition of casting and heat treatment parameters which facilitated the optimum choice of process production under conditions in selected cast steel foundry.