The influence of small amounts of aluminium on the spheroidization of cast iron with cerium mischmetal

• Autorzy: Soiński M. S.
• Języki publikacji: EN

Abstrakty

EN

The influence of aluminium (added in quantity from about 0.6% to about 2.8%) on both the alloy matrix and the shape of graphite precipitates in cast iron treated with a fixed amounts of cerium mischmetal (0.11%) and ferrosilicon (1.29%) is discussed in the paper. The metallographic examinations were carried out for specimens cut out of the separately cast rods of 20 mm diameter. It was found that the addition of aluminium in the amounts from about 0.6% to about 1.1% to the cast iron containing about 3% of carbon, about 3.7% of silicon (after graphitizing modification), and 0.1% of manganese leads to the occurrence of the ferrite-pearlite matrix containing cementite precipitates in the case of the treatment of the alloy with cerium mischmetal . The increase in the quantity of aluminium up to about 1.9% or up to about 2.8% results either in purely ferrite matrix in this first case or in ferrite matrix containing small amounts of pearlite in the latter one. Nodular graphite precipitates occurred only in cast iron containing 1.9% or 2.8% of aluminium, and the greater aluminium content resulted in the higher degree of graphite spheroidization. The noticeable amount of vermicular graphite precipitates accompanied the nodular graphite.

Słowa kluczowe

EN

metallography; cast iron; aluminium; spheroidization; graphite precipitates

PL

metalografia; żeliwo; aluminium; sferoidyzacja; wydzielenia grafitu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 2
• Strony: 117--122
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Soiński M. S.

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

Bibliografia

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• [9] Young S. (1979). Effect of aluminium in cast iron. In 46th International Foundry Congress. 2003 (Paper No. 23). Madrid.
• [10] Soiński M. S. (2001). Spheroidizing of low-aluminium silicon-containing cast iron with cerium mischmetal. Częstochowa: Ed. of the Faculty of Process and Material Engineering and Applied Physics of TU Częstochowa.
• [11] Soiński M. S., Kukla Ł. (2006). Investigations concerning production of low-aluminium-chromium cast iron with compact graphite. Archives of Foundry. 6(18, 2/2), 165-170.
• [12] Soiński M. S., Grzesiak K. (2004). Investigations concerning production of hypoeutectic low-aluminium cast iron with compact graphite. Archives of Foundry. 4 (11), 184-189.
• [13] Soiński M. S., Susek P, Hübner K. et al. (2008). The low-aluminium cast iron of reduced silicon content treated with cerium mischmetal. Archives of Foundry Engineernig. 8 (2), 123-128.
• [14] Soiński M. S. (1986). Application of shape measurement of graphite precipitates in cast iron in optimising the spheroidizing process. Acta Stereologica. 5 (2), 311-317.
• [15] Polish Standard PN-EN ISO 945: Cast iron. Determining of features of graphite precipitates.
• [16] Polish Standard PN-75/H-04661: Grey cast iron, nodular cast iron and malleable. Metallographic examinations. Determining of microstructure.