Modification of the high-alloyed white cast iron microstructure with magnesium master alloy

• Autorzy: Kawalec M.
• Języki publikacji: EN

Abstrakty

EN

High-vanadium cast iron is the white cast iron in which the regular fibrous \gamma + VC eutectic with the volume fraction of vanadium carbide amounting to about 20% crystallises. This paper presents the results of studies on high-vanadium cast iron subjected to the inoculation treatment with magnesium master alloy. The aim of this operation is to change the morphology of the crystallising VC carbides from the fibrous shape into a spheroidal one. The study also examines the effect of the amount of the introduced inoculant on changes in the morphology of the crystallising VC carbides. To achieve the goals once set, metallographic studies were performed on high-vanadium cast iron of eutectic composition in base state and after the introduction of a variable content of the inoculant. The introduction of magnesium-based master alloy resulted in the expected changes of microstructure. The most beneficial effect was obtained with the introduction of 1.5% of magnesium master alloy, since nearly half of the crystallised vanadium carbides have acquired a spheroidal shape.

Słowa kluczowe

EN

high-vanadium cast iron; eutectic alloy; microstructure modification; vanadium carbide; spheroidal carbide

PL

żeliwo wysokowanadowe; stop eutektyczny; modyfikacja mikrostruktury; węglik wanadu; węglik sferoidalny

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 2
• Strony: 71--74
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Kawalec M.

• Faculty of Foundry Engineering, Department of Engineering of Cast Alloys and Composites, AGH University of Science and Technology, ul. Reymonta 23, 30-059 Kraków, Poland

Bibliografia

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• [2] Fraś, E. (2003). Crystallization of metals. Warsaw: WNT.
• [3] Kopyciński, D. & Piasny, S. (2012). Influence of tungsten and titanium on the structure of chromium cast iron. Archives of Foundry Engineering. 12(1), 57-60.
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• [5] Fraś, E. & Kawalec, M. (2008). Structure, mechanical properties and abrasive wear resistance of Fe-C-V alloys. Materials Engineering. 29(2), 78-85. (in Polish).
• [6] Kopyciński, D. (2009). Inoculation of chromium white cast iron. Archives of Foundry Engineering. 9(1), 191-194.
• [7] Kopyciński, D., Guzik, E. & Piasny, S. (2011). The structure of abrasion-resisting castings made of chromium cast iron. Archives of Foundry Engineering. 11(1), 61-66.
• [8] Uematsu, Y., Tokaji, K., Horie, T. & Nishigaki, K. (2007). Fracture toughness and fatigue crack propagation in cast irons with spheroidal vanadium carbides dispersed within martensitic matrix microstructure. Materials Science and Technology. 471(A), 15-21.
• [9] Tokaji, K., Horie, T. & Enomoto, Y. (2006). Effect of microstructure and carbide spheroidization on fatigue behaviour in high V-Cr-Ni cast irons. International Journal of Fatigue. 28, 281-288.
• [10] Tanaka, M., Shimizu, K., Ito D. & Noguchi, T. (2011). Fatigue Characteristic of Spheroidal Vanadium Carbides Cast Iron. Key Engineering Materials. 457, 279-284.
• [11] Nishiuchi, S., Yamamoto, S., Tanabe, T., Kitsudo, T., Matsumoto, H. & Kawano, Y. (2003). Development of Stainless Spheroidal Carbide (VC) Cast Iron. Transaction of the American Foundry Society. 831-844.
• [12] Guzik, E. (2001). The process of transforming cast iron – chosen questions. Archives of Foundry Engineering.
• [13] Kawalec, M. (2011). The spheroidisation of VC carbides in high-vanadium cast iron. Archives of Foundry Engineering. 11, 111-116.
• [14] Kawalec, M. & Olejnik, E. (2012). Abrasive wear resistance of cast iron with precipitates of spheroidal VC carbides. Archives of Foundry Engineering. 12(2), 221-226. DOI: 10.2478/v10266-012-0065-2.
• [15] Kawalec, M., Górny, M. (2012). Alloyed white cast iron with precipitates of spheroidal vanadium carbides VC. Archives of Foundry Engineering. 12(4), 95-100. DOI: 10.2478/v10266-012-0113-y.