The influence of small amounts of aluminium on the effectiveness of cast iron spheroidization with magnesium

• Autorzy: Soiński M. S. , Jakubus A.
• Języki publikacji: EN

Abstrakty

EN

The influence of aluminium added in amounts of about 1.6%, 2.1%, or 2.8% on the effectiveness of cast iron spheroidization with magnesium was determined. The cast iron was melted and treated with FeSiMg7 master alloy under industrial conditions. The metallographic examinations were performed for the separately cast rods of 20 mm diameter. They included the assessment of the shape of graphite precipitates and of the matrix structure. The results allowed to state that the despheroidizing influence of aluminium (introduced in the above mentioned quantities) is the stronger, the higher is the aluminium content in the alloy. The results of examinations carried out by means of a computer image analyser enabled the quantitative assessment of the considered aluminium addition influence. It was found that the despheroidizing influence of aluminium (up to about 2.8%) yields the crystallization of either the deformed nodular graphite precipitates or vermicular graphite precipitates. None of the examined specimens, however, contained the flake graphite precipitates. The results of examinations confirmed the already known opinion that aluminium widens the range of ferrite crystallization.

Słowa kluczowe

EN

metallography; aluminium; cast iron; spheroidization; graphite precipitates

PL

metalografia; aluminium; żeliwo; sferoidyzacja; wydzielenia grafitu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 3
• Strony: 80--83
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Soiński M. S.

• Department of Foundry, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Jakubus A.

• Department of Foundry, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] Bobro, Ju.G. (1964). Aluminium cast irons. Charkov: Izd. Charkovskogo Univ.
• [2] Podrzucki, C. (1991). Cast iron. Structure, properties, applications. Cracow: Ed. ZG STOP.
• [3] Soiński, M.S. (2012). Low-aluminium cast iron. Częstochowa: Ed. of the Faculty of Materials Processing Technology and Applied Physics of Częstochowa University of Technology.
• [4] Henke F. (1966). Aluminium in cast iron. (Aluminium in Gußeisen). Giesserei – Praxis. (5), 76-82.
• [5] Laplanche, H. (1970). Aluminium castings. (Les fontes á l’aluminium). Metall. Constr. Mec. 102(9), 499-512.
• [6] Hasse, S. (1995). Influence of trace elements in nodular cast iron. (Die Wirkung von Spurenelementen in Gußeisen mit Kugelgraphit). Giesserei Prax. (15/16), 271-278.
• [7] Soiński, M.S. & Kukla, Ł. (2006). Investigations concerning production of low-aluminium-chromium cast iron with compact graphite. Archives of Foundry Engineering. 6(18,2/2), 165-170.
• [8] Soiński, M.S. & Grzesiak, K. (2004). Investigations concerning production of hypoeutectic low-aluminium cast iron with compact graphite. Archives of Foundry Engineering. 4(11), 184-189.
• [9] Soiński, M.S., Susek, P., Hübner, K. & Mierzwa, P. (2008). The low-aluminium cast iron of reduced silicon content treated with cerium mischmetal. Archives of Foundry Engineering. 8(2), 123-128.
• [10] Nofel, A.A., Felix, N.S. & Rezk, A.S. (1983). Cast Iron Alloyed with 9% Aluminium. In 50th Internat. Foundry Congress. Cairo (10), 1-16.
• [11] Polish Standard PN-EN ISO 945-1: Microstructure of cast irons. Part 1. Graphite classification by visual analysis.
• [12] Polish Standard PN-75/H-04661: Grey cast iron, nodular cast iron and malleable. Metallographic examinations Determining of microstructure.