Numerical Modeling of Precipitation Processes in Heat Resistant HR3C Austenitic Steel Using CALPHAD Method |
| H. Purzyńskaa, R. Kuziaka, G. Golańskib
aŁukasiewicz Research Network - Institute for Ferrous Metallurgy, K. Miarki 12-14, 44-100 Gliwice, Poland bCzestochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
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| The paper deals with numerical modelling of precipitation processes in HR3C austenitic steel used in supercritical power units. Thermodynamic and kinetic modelling was performed using, respectively, ThermoCalc and TC-PRISMA software. Both programmes use the CALculation of PHAse Diagrams method. The thermodynamics calculations predicted the formation of M23C6 carbide, σ-phase and Z-phase in HR3C steel at working temperatures of power units. Verification of the modelling stage was performed by ageing the steel samples at 700° for 100 and 500 h. It was found that during a such short time of ageing, M23C6 carbide precipitated mainly at austenite grain boundaries, while NbX and Z-phase particles precipitated inside the grain. |
DOI:10.12693/APhysPolA.142.145 topics: modelling, ThermoCalc, TC-Prisma, austenitic steel |