1. Calculation of Time Temperature Transformation Diagrams H. K. D. H. Bhadeshia Metal Science 16 (1982) 159-165 cml.postech.ac.kr

3.   x Gibbs free energy Carbon  G m x  m   G Thermodynamics

6. Bainite-start temperature

11. Fe-0.33C-0.18Si-1.48Mn-0.26Ni-0.16Cr-0.27Mo wt%

12. Fe-0.27C-0.13Si-0.60Mn-0.19Ni-0.74Cr-0.55Mo wt%

14. Fe-0.38C-0.25Si-1.49Mn-0.24Ni-0.14Cr-0.41Mo wt%

15. Fe-0.38C-0.2Si-0.69Mn-1.58Ni-0.95Cr-0.26Mo wt%

16. Fe-0.32C-0.28Si-0.61Mn-3.22Ni-0.63Cr-0.22Mo-0.025V wt%

17. Fe-0.39C-0.23Si-0.62Mn-1.44Ni-1.11Cr-0.18Mo wt%

18. Fe-0.42C-0.31Si-0.67Mn-2.53Ni-0.72Cr-0.48Mo wt%

23. 1 2 3 4 5 6 1. Fe-0.4C 2. Fe-0.4C-2Si 3. Fe-0.4C-1Ni 4. Fe-0.4C-1Mn 5. Fe-0.4C-1Mn-1Cr 6. Fe-0.4C-2Mn 0 1 2 3 4 5 10 10 10 10 10 10 Time / s 800 700 600 500 400 300 200 Temperature / C calculations

24. ∆t i t i   cooling curve Time Temperature isothermal transformation curves