Phase diagram in the iron-rich corner of the Fe-Cr-Mo-V-C system below 1000 K

Citation
A. Kroupa et al., Phase diagram in the iron-rich corner of the Fe-Cr-Mo-V-C system below 1000 K, J PH EQUIL, 22(3), 2001, pp. 312-323
Citations number
47
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHASE EQUILIBRIA
ISSN journal
10549714 → ACNP
Volume
22
Issue
3
Year of publication
2001
Pages
312 - 323
Database
ISI
SICI code
1054-9714(200106)22:3<312:PDITIC>2.0.ZU;2-0
Abstract
Relevant experimental phase equilibria were used with the THERMOCALC progra m to refine thermodynamic parameters for the low-temperature region, in the steels with composition 0.4 to 2.5 wt.% Cr, 0 to 1 wt.% Mo, and 0 to 0.5 w t.% V. The refined parameters were used to calculate phase relationships, w hich were then compared with experimental results. The main interest was focused on the temperature and concentration regions of existence of the chromium-rich carbides M7C3 and M23C6 and Mo-rich carbi des M6C and MIG. Results of experiments indicate that M7C3 carbide replaces M23C6 carbide in the temperature region between 773 and 873 K. Similar beh avior was also found for molybdenum-rich phases M6C and M2C. Some modificat ions of existing thermodynamic parameters in the low-temperature region, as well as the establishment of some new parameters, were necessary to obtain reasonable agreement between theoretical and experimental results.