Structure and mechanical properties of vermicular cast iron in cylinder head casting

• Autorzy: Guzik E. , Dzik S.
• Języki publikacji: EN

Abstrakty

EN

The paper discusses the problem of grain density and ferrite content in microstructure of vermicular graphite iron cast in bars of different section diameters and cylinder head casting. The experimental results regarding the section effect demonstrate that the nodule count, grain density and ferrite content are all function of the cast bar diameter in this particular case ranging from 0.6 to 8.0 cm and microstructure and mechanical properties in the cylinder head. The nodule count (or grain density) has been reported to increase, while ferrite content was decreasing with decreasing casting diameter. The density number of the grains Nv has been related (by regression analysis) to the undercooling degree [...]. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 40%) for the production of vermicular graphite cast irons at 'WSK-Rzeszów' Metallurgical Plant Ltd. for first series of cylinder head. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The paper presents a microstructure matrix and vermicular graphite in standard sample and different walled cylinder head castings. The results of numerous trials have shown that the magnesium cored wire process can produce high quality vermicular graphite irons, which its ideally suited to meet the current and future requirements of engine design and performance.

Słowa kluczowe

EN

vermicular cast iron; structure; mechanical properties; cylinder head casting

PL

żeliwo wermikularne; struktura; właściwości mechaniczne; odlewanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 1
• Strony: 175--180
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Guzik E.

autor

Dzik S.

• University of Science and Technology, Reymonta 23St, 30-059 Kraków, Poland,

Bibliografia

• [1] S. Davson, Compacted Graphite Iron - A Material Solution for Modern Diesel Engine Cylinder Blocks and Heads, 68th WFC - World Foundry Congress, February, 2008, 93-99.
• [2] E. Guzik, Some selected problems concerning the processes of cast iron improvement, Archives of Foundry Engineering, Polish Academy of Sciences- Katowice, Monograph, No. 1M 2001.
• [3] D. Steller, Das neue VDG- Merkblatt W 50 Gusseisen mit Vermiculargraphit, Giesserei, vol.89, No. 11 (2002) 48-50.
• [4] C. Podrzucki, A. Wojtysiak, High quality grey cast iron, School-book AGH- University of Science and Technology, Kraków, vol. 1, 1986/87.
• [5] E. Guzik, K. Kukułka, Shaping of the microstructure of ductile cast iron in the walled castings. Archives of Foundry Engineering, Polish Academy of Sciences - Katowice, Vol. 1, No. 1 (2/2) (2001) 117-125.
• [6] Ch. Charbon, M. Rappaz, 3D Stochastic modelling of nodular cast iron solidification. Physical Metallurgy of Cast Iron V. Sc. Publ. Switzerland, 1997, 453-460.
• [7] E. Guzik, S. Dzik, Possibility formation of the microstructure and properties of high quality vermicular cast iron. Inżynieria Materiałowa, No. 3 (2006) 712-715.
• [8] G. Nodżak, Thesis in Department of Foundry Engineering, AGH- University of Science and Technology- Kraków, (protection prof. E. Guzik).