ADI after austenitising from intercritical temperature

• Autorzy: Kowalski A. , Kluska-Nawarecka S. , Regulski K.
• Języki publikacji: EN

Abstrakty

EN

ADI subjected to austenitising at intercritical temperatures contains in its matrix the precipitates of pre-eutectoid ferrite. Studies were carried out on the ductile iron of the following chemical composition: C = 3,80%, Si = 2,30%, Mn = 0,28%, P = 0,060%, S = 0,010%, Mg = 0,065%, Ni = 0,60%, Cu = 0,70%, Mo = 0,21%. This cast iron was austenitised at three different temperatures, i.e. 800, 815 and 830ºC and austempered at 360 and 380ºC. For each variant of the cast iron heat treatment, the mechanical properties, i.e. YS, TS, EL and Hardness, were measured, and structure of the matrix was examined. Higher plastic properties were obtained owing to the presence of certain amount of pre-eutectoid ferrite. The properties were visualised using fuzzy logic model in a MATLAB. software.

Słowa kluczowe

EN

ductile cast iron; austempering; microstructure; mechanical properties; fuzzy logic

PL

żeliwo sferoidalne; hartowanie izotermiczne; mikrostruktura; właściwości mechaniczne; logika rozmyta

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 1
• Strony: 81--88
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Kowalski A.

• Foundry Research Institute, Zakopiańska str. 73., 30-418 Krakow, Poland

autor

Kluska-Nawarecka S.

• Foundry Research Institute, Zakopiańska str. 73., 30-418 Krakow, Poland

autor

Regulski K.

• AGH – University of Science and Technology, Mickiewicza str. 30, Krakow, Poland

Bibliografia

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• [2] Kovacs B. V. (1994). On the terminology and structure of ADI. AFS Transactions, 102, 417-420.
• [3] Bayati H., Elliott R.Lorimer W. (1995). Influence of austenitising temperature on austempering kinetics of high manganese alloyed ductile cast iron. Mat. Science and Technology. 4(8), 776-771.
• [4] Galarreta A., Boeri R.E., Sikora J.A. (1997). Free ferrite in pearlitic ductile iron - morphology and its influence on mechanical properties. Cast Metals. 9, 353-357.
• [5] Aranzabal J. Serramoglia G., Rousière D. (2000) Development of a new mixed (ferritic-ausferritic) ductile iron for automotive suspension parts. Metallurgical Science and Technology. 18(1), 24-29.
• [6] Rousière D., Aranzabal J.(1999). Obtention de structures mixtes dans le domaine des fontes à graphite spheroidal. Hommes & fonderie. 299(2), 18-22.
• [7] Keyough J.R., Hayrynen K.L. (2003). Is it time for a grade 800 ADI in North America. AFS Transactions, 1-6.
• [8] Kluska-Nawarecka S., Smolarek-Grzyb A., Wilk-Kołodziejczyk D., Adrian A. (2007). Knowledge Representation of Casting Metal Defects by Means of Ontology, Archives of Foundry engineering, Polish Academy of Sciences, e 7( 3), 75-78. ISSN 1897-3310.
• [9] Kluska-Nawarecka S., Górny Z., Wilk-Kołodziejczyk D., Smolarek-Grzyb A. (2007). The Logic of Plausible Reasoning in the Diagnosis of Castings Defects. Archives of Metallurgy and Materials. 52(3), 375-380, ISSN 1733-3490.
• [10] F. Binczyk, A. Hanc, A. Kowalski. (2008). Austempering transformation kinetics of austempered ductile iron obtained by Mössbauer Spectroscopy. Archives of Foundry Engineering. 8(3), 15-21.