A Study on the Isothermal Crystallization and Devitrification of Mold Powder Slags
(Room 407)
16 May 16
10:30 AM
-
11:00 AM
Tracks:
Degassing Optimization, Mold Powders
The kinetics of formation of crystalline phases from mold powder slags is of foremost importance in the performance of steel continuous casting molds. This study employs high-temperature confocal microscopy and semi-quantitative x-ray diffraction analysis to demonstrate that non-isothermal data from thermo-analytical (differential scanning calorimetry, DSC) peaks, generated at various linear heating and cooling rates, can be interpreted through a novel kinetic model for estimating the isothermal transformation of liquid and glassy slags. The combined DSC-kinetic model approach leads to time-temperature-transformation (TTT) diagrams showing curves for the degree of conversion of each of the species corresponding to the peaks appearing in the thermo-analysis traces. The procedure shows good accuracy and describes the crystallization in more detail than other methods used for evaluating TTT diagrams.