Effect of Reclamation on the Skin Layer of Ductile Iron Cast in Furan Molds

• Published in: Journal of materials engineering and performance Vol. 22; no. 11; pp. 3592 - 3600
• Main Authors: Dańko, R., Holtzer, M., Górny, M., Żymankowska-Kumon, S.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.11.2013; Springer
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Exact sciences and technology; Foundry engineering; Materials Science; Metals. Metallurgy; Other casting methods. Solidification; Production techniques; Quality Control; Reliability; Safety and Risk; Tribology; graphite degeneration; molding sand; casting skin; ductile iron; Operating mode; Molding sand; Microstructure; Sand casting; Ductile cast iron
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-013-0656-2

The paper presents the results of investigations of the influence of the quality of molding sand with furan resin hardened by paratoluenesulfonic acid, on the formation of microstructure and surface quality of ductile iron castings. Within the studies different molding sands were used: molding sand prepared with fresh sand and molding sands prepared with reclaimed sands of a different purification degree, determined by the ignition loss value. Various concentrations of sulfur and nitrogen in the sand molds as a function of the ignition loss were shown in the paper. A series of experimental melts of ductile iron in molds made of molding sand characterized by different levels of surface-active elements (e.g., sulfur) and different gas evolution rates were performed. It was shown that there exists a significant effect of the quality of the sand on the formation of the graphite degeneration layer.