2001 Volume 41 Issue 11 Pages 1309-1315
In order to determine the phase diagram of the MnO–SiO2–CrOx system for PO2=2×10-6 Pa at 1873 K, one of the important information for the controlling of non-metallic inclusions (deoxidation products) formation during the stainless steel Si-deoxidation process, the following equilibrium experiments were conducted at 1873 K under controlled oxygen partial pressure, PO2:
(I) Phase equilibria of the MnO–Cr2O3 binary system were measured as a function of PO2 (2×10-6–2×102Pa).
(II) Phase equilibria of the MnO–SiO2–CrOx ternary system were measured for PO2=2×10-6Pa.
Finally, the change in composition of inclusions during this process with increasing silicon addition was examined by using the determined phase diagram of this ternary system.
