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Investigation of the Effect of Solidification Time and Addition Amount of Inoculation on Microstructure and Hardness in Lamellar Graphite Cast Iron

Çolak Murat, Uslu Emin, Teke Çağatay, Şafak F., Erol Ő., Erol Y., Çoban Y., Yavuz M.

Archives of Foundry Engineering

2022

Vol. 22, iss. 4

24--33

Material suppliers typically recommend different additive amounts and applications for foundry practices. Therefore, even in the production of the same standard materials, different results may be obtained from various production processes on different foundry floors. In this study, the liquid metal prepared with the addition of different proportions of a FeSi-based inoculation, which is most commonly used in foundries in the production of a cast iron material with EN-GJL-250 lamellar graphite cast iron, was cast into sand molds prepared with a model designed to provide different solidification times. In this way, the optimization of the inoculation amounts on the casting structure for different solidification times was investigated. In addition, hardness values were determined depending on solidification time in varying amounts of inoculation additions. SolidCast casting simulation software was used to determine the casting model geometry and solidification time. In the scope of the study, sand casting, modeling, microstructure analysis, image analysis, microstructure analysis, and hardness tests techniques were used. When the results are examined, the required amount of inoculation for the optimal structure is optimized for the application procedure depending on the casting module and the solidification time.

Analysis of fracture mechanism in austenitic ductile iron with 30% Ni after impact test

Putyra P., Tabor A., Zarębski K.

Archives of Foundry Engineering

2008

Vol. 8, iss. 4

193-198

The study presents the results of impact tests carried out on austenitic ductile iron with 30% Ni. The examined material was subjected to dynamic loads within a wide range of temperatures from (-196°C) to (+400°C). The fractures were examined under a JEOL JSM 6460LV scanning electron microscope. Additionally, microstructural examinations were carried out and chemical analysis in microregions was done by EDS.

Vplyv zvyšovania ocel'oveho šrotu vo vsadzke na mechanicke vlestnosti a štruktúru liatiny

Bobok L., Futaš P., Vaskova I.

Archiwum Odlewnictwa

2004

R. 4, nr 11/1

59--63

Liatina s gulockovym grafitom (LGG) si nasla od polovice 20. storocia svoje miesto na ukor liatiny s lupienkovym grafitom (LLG) a takmer celkom vytlacila temperovanu liatinu. Nast vyroby LGG v priemyselne vyspelych statoch Europy [...]

The iron casting in the long term keep up primacy the cast stock to base of iron. The cast stock from spheroidal graphite cast iron have technical and technological properties. Economic development in at the manufacturing department force the entrepreneur and manufacturer to rationalization producing at therely decreasing manufacturing costs. In term of manufacturing costs the world-wide trend take off on the way raising share steel scrap on the production of technology rises. The intention of study was finding out the effect various changing composition batch, especially steel scrap to consequential properties of spheroidal graphite cast iron.