[Kovove materialy - Metallic materials]
    Wed - November 13, 2024 - 19:43 No. of hits : 1798075 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 37 (1999), Issue 2

Possibilities of theoretical determination of equilibrium phase chemical compositions in low alloy steels using available thermodynamic data (in Slovak)
HOMOLOVA, V., KROUPA, A., JANOVEC, J.
vol. 37 (1999), no. 2, pp. 129 - 143

Abstract
In this work the influence of temperature (in the range of 773-993 K) and steel chemical composition on changes in metal compositions of M7C3, M23C6, M6C, and MC carbides was studied. Temperature dependencies of Fe, Cr, Mo, and V contents in carbides were calculated, by means of thermodynamic database program PD-pp. From the point of view of chemical composition, five-component Fe-Cr-Mo-V-C systems, corresponding to four Cr-Mo-V (Cr-Mo) low alloy steels, were analyzed. With respect to changes in phase equilibria, the temperature range 773-993 K was divided into three subranges. In each of them, the temperature dependencies of carbide metal compositions showed typical linear or quadratic course. It was found that the V/Mo ratio in bulk influences the metal composition of carbides systematically.

Key words
equilibrium phase, Hillert-Staffansson sublattice model, thermodynamic database program

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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