The Influence of Wall Thickness and Mould Temperature on Structure and Properties of Thin Wall Ductile Iron Castings

• Autorzy: Górny M. , Kawalec M. , Witek G. , Rejek A.

Identyfikatory

DOI

10.24425/afe.2019.127116

• Języki publikacji: EN

Abstrakty

EN

The excellent property combination of thin wall ductile iron castings (TWDI), including thin wall alloyed cast iron (e.g. austenitic TWDI) has opened new horizons for cast iron to replace steel castings and forgings in many engineering applications with considerable cost benefits. TWDI is considered as a potential material for the preparation of light castings with good mechanical and utility properties, the cost of which is relatively low. In this study, unalloyed and high Ni-alloyed (25% Ni) spheroidal graphite cast iron, with an austenitic metallic matrix were investigated. The research was conducted for thin-walled iron castings with 2, 3 and 5mm wall thickness, using different mould temperature (20°C, and 160°C) to achieve various cooling rates. The metallographic examinations i.e. characteristic of graphite nodules, metallic matrix, and primary grains of austenite dendrites (in high-nickel NTWDI) and mechanical properties were investigated. The study shows that homogeneity of the casting structure of thin-walled castings varies when changing the wall thickness and mould temperature. Finally, mechanical properties of thin-walled ductile iron castings with ferritic-pearlitic and austenitic metallic matrix have been shown.

Słowa kluczowe

EN

metallography; mechanical properties; ductile iron; austenitic ductile iron; high Ni alloying; mould temperature; thin wall casting

PL

metalografia; właściwości mechaniczne; ciągliwy metal; żeliwo sferoidalne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 2
• Strony: 55--59
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Górny M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland

autor

Kawalec M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland

autor

Witek G.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland

autor

Rejek A.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland

Bibliografia

• [1] Fraś, E., Górny, M. & Kapturkiewicz, W. (2013). Thin Wall Ductile Iron Castings: Technological Aspects. Archives of Foundry Engineering. 13(1), 23-28.
• [2] Campbell, J. (1991). Castings. Butterworth-Heinemann: Oxford, UK.
• [3] Górny, M. & Tyrała, E. (2013). Effect of Cooling Rate on Microstructure and Mechanical Properties of Thin-Wall Ductile Iron Castings. Journal of Materials Engineering and Performance. 22(1), 300-305.
• [4] Stefanescu, D.M. (2004). Factors Affecting the Mechanical Properties of Lightweight Ductile Iron Castings. The 66th International Foundry Congress, Sept 2004 (Istanbul, Turkey), (1-12).
• [5] Stefanescu, D.M., Dix, L.P., Ruxanda, R.E., Corbitt-Coburn, C. & Piwonka, T.S. (2002). Tensile Properties of Thin Wall Ductile Iron. AFS Trans. 110, 1149-1161.
• [6] Ruxanda, R., Stefanescu, D.M. & Piwonka, T.S. (2002). Microstructure Characterization of Ductile Thin Wall Iron Castings. AFS Trans. 110, 1131-1147.
• [7] Dix, L.P., Ruxanda, R., Torrance, J., Fukumoto, M. & Stefanescu, D.M. (2003). Static Mechanical Properties of Ferritic and Pearlitic Lightweight Ductile Iron Castings. AFS Trans. 111, 1149-1164.
• [8] Fragassa, C., Minak, G. & Pavlovic, A. (2016). Tribological aspects of cast iron investigated via fracture toughness. Tribology in Industry. 38, 1-10.
• [9] Gumienny, G. (2012). The Effect of Nodular Cast Iron Metal Matrix on the Wear Resistance. Archives of Foundry Engineering. 12, 179-186.
• [10] Górny, M., Kawalec, M., Sikora, G., Olejnik, E. & Lopez, H. (2018). Primary Structure and Graphite Nodules in Thin-Walled High-Nickel Ductile Iron Castings. Metals. 8, 649. DOI:10.3390/met8080649.
• [11] Fatahalla, N., AbuElEzz, A., Semeida, M. (2009). C, Si and Ni as alloying elements to vary carbon equivalent of austenitic ductile cast iron: Microstructure and mechanical properties. Materials Science and Engineering. A. 504, 81-89.
• [12] Charoenvilaisiri, S., Stefanescu, D.M., Ruxanda, R. & Piwonka, T.S. (2002). Thin Wall Compacted Graphite Iron Castings. AFS Transactions. 110, 1113-1130.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).