Forming of primary austenite in low-sulphur cast iron

• Autorzy: Kopyciński D. , Guzik E. , Dorula J.
• Języki publikacji: EN

Abstrakty

EN

The study proves that by introducing the disintegrated steel scrap to low-sulphur cast iron still before the inoculation carried out with a conventional graphitising inoculant, the mechanical properties similar to those obtained during the inoculation treatment carried out on cast iron with the recommended high sulphur content are achieved. The said operation increases the number of crystallisation nuclei for dendrites of the primary austenite. In this case, the iron particles act as substrates for the nucleation of primary austenite \ypsilon p due to a similar crystallographic behaviour of the regular face centered cubic lattice. The more numerous are the dendrites of primary austenite, the less free space is available in the interdendritic spaces for the formation of graphite eutectic grains, which makes the structure more refined (more eutectic grains) and the mechanical properties higher.

Słowa kluczowe

EN

inoculation; cast iron; dendrites; structure; mechanical properties

PL

żeliwo; dendryty; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 1
• Strony: 57--60
• Opis fizyczny: Bibliogr. 10 poz., tab., rys.

Twórcy

autor

Kopyciński D.

autor

Guzik E.

autor

Dorula J.

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

Bibliografia

• [1] N. C. McClure, A. U. Khan, D. D. McGrady, H. L. Womohel, Inoculation of grey cast iron. Transactions AFS, 1957, 65, 340-349.
• [2] H. D. Merchant, L. J. Toriello, J. F. Wallace, Inoculation influence on grey cast iron structure at various carbon equivalences. Modern Castings, 1961, 33, 109-116.
• [3] W. C. Filkins, W. F. Stuhrke, D. Matter , J. F. Wallace, Grey cast iron inoculation and inoculants evaluation. Transactions AFS, 1963, 70, 882-895.
• [4] A. De Sy, Oxygen, oxides, superheating and graphite nucleation in cast iron. Modern Castings, 1967, 52, 67-78.
• [5] B. Lux, Nucleation and graphite in Fe-C-Si alloys, in Recent Research on Cast Iron, Gordon and Breach. 1968 New York - London - Paris.
• [6] E. Fraś, C. Podrzucki, Inoculation of cast iron. Printed series of course lectures, 1978, AGH Kraków, No. 678, (in polish).
• [7] S. O. Olsen, T. Skaland, C. Hartung, Inoculation of grey and ductile iron a comparison of nucleation sites and some practical advises. Elkem ASA, Foundry Products Division, 14 th International Baltic Conference Materials Engineering'2005.
• [8] R. Elliott, Cast Iron Technology, 1988, London, UK, Butterworths.
• [9] I. Riposan, M. Chisamera, S. Stan, T. Skaland, M. Onsoien, Analysis of possible nucleation sites in Ca/Sr over-inoculated grey cast irons. Transactions AFS, 2001, 109, 1151-1162.
• [10] A. Dioszegi, K. Z. Liu, J. L. Svensson, Inoculation of primary austenite in grey cast iron. Cast Metals Res., 2007, 20, 2, 68-72.