Authors: Homolová, V.; Janovec, J.; Kusý, M.; Moravčík, R.; Illeková, E.; Grgac, P.

Source: Canadian Metallurgical Quarterly, Volume 42, Number 1, March 2003 , pp. 89-96(8)

Publisher: Maney Publishing

Abstract:

Phase transformations in hypereutectic Ch3F12 and hypoeutectic Ch12MF4 tool alloys were studied by means of differential thermal analysis (DTA). Calculations of phase equilibria for Fe-Cr-V-C and Fe-Cr-V-Mo-C systems corresponding to the investigated alloys were carried out using the thermodynamic database program Thermo-Calc in the temperature range of 750-1700 K. Seven different equilibria consisting of five different phases (ferrite, austenite, liquid, M₇C₃ and MC) were determined for both alloys by means of thermodynamic calculations. There was found a good agreement between theoretical (temperatures between different equilibria) and experimental (temperatures of phase transformations) results.

French
On a étudié les transformations de phase d'alliages à outils avec Ch3F12 hypereutectique et avec Ch12MF4 hypoeutectique au moyen de l'analyse thermique différentielle (DTA). On a effectué les calculs d'équilibres de phase des systèmes Fe-Cr-V-C et Fe-Cr-V-Mo-C correspondant aux alliages investigués en utilisant le programme de base de données thermodynamiques Thermo-Calc dans la gamme de température de 750 à 1700 K. On a déterminé sept équilibres différents consistant de cinq phases différentes (ferrite, austénite, liquide, M₇C₃ et MC) pour les deux alliages au moyen de calculs thermodynamiques. On a trouvé un bon accord entre les résultats théoriques (températures entre les différents équilibres) et expérimentaux (températures de transformations de phase).

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/000844303794535799

Publication date: 2003-03-01

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