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Thermodynamic Calculations on the Stability of Cu2S in Low Carbon Steels

Lee , Byeong-Joo and Sundman, Bo and Il Kim , Sung and Chin, Kwang-Geun Thermodynamic Calculations on the Stability of Cu2S in Low Carbon Steels. (2007) ISIJ International , 47 (1). 163-171. ISSN 0915-1559

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Official URL: http://dx.doi.org/10.2355/isijinternational.47.163


Thermodynamic stability of Cu2S sulfide in low carbon steels has been investigated using a CALPHAD type thermodynamic calculation method. Thermodynamic properties of the Cu–S binary and Fe–Cu–S ternary systems were critically assessed. By combining the newly assessed thermodynamic parameters to an existing thermodynamic database for steels, a thermodynamic description for low carbon steels involving sulfur and Cu could be obtained and be used to calculate phase equilibria and thermodynamic stability of precipitating phases such as AlN, MnS, and Cu2S. It was predicted that the Cu2S sulfide often observed in low carbon steels is actually a thermodynamically unstable phase and can precipitate when thermodynamic equilibrium state is not reached during steel making processes. Probable reasons and conditions for the formation of this unstable phase are discussed.

Item Type:Article
Additional Information:Thanks to Japan Science and Technology Information Aggregator, Electronic editor. The definitive version is available at http://www.jstage.jst.go.jp The original PDF of the article can be found at ISIJ International website : http://www.jstage.jst.go.jp/browse/isijinternational
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Pohang University of Science and Technology - POSTECH (REPULIC OF KOREA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > POSCO E&C (REPUBLIC OF KOREA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Royal Institute of Technology – KTH (SWEDEN)
Laboratory name:
Deposited On:16 Oct 2009 07:14

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