Original scientific paper

Precipitation of metallic chromium during rapid cooling of Cr₂O₃ slags

J. Burja ; Institute of Metals and Technology, Ljubljana, Slovenia
F. Tehovnik ; Institute of Metals and Technology, Ljubljana, Slovenia
F. Vode ; Institute of Metals and Technology, Ljubljana, Slovenia
M. Godec ; Institute of Metals and Technology, Ljubljana, Slovenia
B. Arh ; Institute of Metals and Technology, Ljubljana, Slovenia
J. Medved ; University of Ljubljana, Faculty of Natural Sciences and Engineering, Ljubljana, Slovenia

Abstract

The slag systems of CaO-SiO₂- Cr₂O₃ and Al₂O₃-CaO-MgO-SiO₂- Cr₂O₃ were analyzed. These slag systems occur in the production of stainless steel and are important from the process metallurgy point of view. Synthetic slag samples with different chromium oxide content were prepared and melted. The melted slag samples where then rapidly cooled on large steel plates, so that the high temperature microstructure was preserved. The samples were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The precipitation of different chromium oxide phases was studied, but most importantly the precipitation of metallic chromium was observed. These findings help us interpret industrial slag samples.

Keywords

stainless steel oxidation; steelmaking slag; chromium oxide; cooling; microstructure

Hrčak ID:

168842

URI

https://hrcak.srce.hr/168842

Publication date:

2.1.2017.

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