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Guo Lei
Graduate Institute for Ferrous Technology, POSTECH, Republic of Korea
E-mail: guolei@postech.ac.kr
Added to MAP: August 2007.
To predict the carbon content in retained austenite and volume fraction of retained austenite in cold-rolled TRIP-assisted steel as a function of the chemical composition and the heat treatment parameters.
| Language: Visual Basic 6.0 | Source code, platform: Windows |
MAP_STEEL_TRIP uses carbon diffusion-controlled intercritical annealing model to predict austenite volume fraction and carbon content after intercritical annealing, and also carbon diffusion-controlled model to simulation isothermal bainite transformation. Cementite precipitation has been taken into account through a modified ZenerŐs growth model. Thermodynamic data are obtained from MTDATA database: SGTE Solution database 3.01 19/7/93.
Inputs in sequence of C, Mn, Si, Al, P, Nb, Mo, N, S, B, Fe (all in wt%), intercritical annealing temperature (°C), intercritical annealing time (s), isothermal bainite transformation temperature (°C) and isothermal bainite transformation time (s), pearlite colony radius (μm), bainite interpolate spacing(μm).
Example:
0.2 1.5 0.3 0.05 0.1 0.003 0.04 0.003 0.003 0.0005 97.8005
750 500 400 2000 20
Outputs in sequence of carbon content in retained austenite, retained austenite volume fraction
0.26783 0.04573
None.
MAP_STEEL_DIFFUS
MTDATA authorization for programming is required
intercritical annealing, isothermal bainite transformation, retained austenite
MAP originated from a joint project of the National Physical Laboratory and the University of Cambridge.