Szczegóły publikacji

Opis bibliograficzny

Autorzy (4)

• AGHFraś Edward
• AGHGórny Marcin
• López Hugo F.
• AGHKawalec Magdalena

Dane bibliometryczne

ID BaDAP	75089
Data dodania do BaDAP	2013-08-05
Tekst źródłowy	URL
DOI	10.1007/s11661-012-1604-8
Rok publikacji	2013
Typ publikacji	artykuł w czasopiśmie
Otwarty dostęp
Czasopismo/seria	Metallurgical and Materials Transactions, A, Physical Metallurgy and Materials Science

Abstract

In the current study, an analytic solution is considered to explain the influence of sulfur on the transition from graphite to cementite eutectic in cast iron. The outcome from the current study indicates that this transition can be related to (a) the graphite nucleation potential (directly characterized by the cell count and indirectly by the nucleation coefficients; (b) the eutectic graphite growth rate coefficient; (c) the temperature range between the equilibrium temperature for graphite eutectic and the formation temperature for cementite eutectic; and (d) the liquid volume fraction, after pre-eutectic austenite solidification. In addition, the absolute and the relative chilling tendencies, as well as critical cooling rates including the chill width of the cast iron can be predicted from the current study. The analytic model was experimentally verified for castings with various sulfur contents. It is found that the main role of sulfur on the transition from graphite to cementite eutectic is through its effect on lowering the growth coefficient, and hence, the graphite eutectic growth rate. In addition, it is found that with the increasing sulfur content, the critical cooling rate is significantly reduced, thus increasing the absolute and the relative chilling tendency values, including the chill width.

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