INVESTIGATION OF THE SELECTIVE OXIDATION PROCESS FOR HIGH STRENGTH STEELS

In the present work, a 1D implicit model has been developed to simulate simultaneous diffusion of chemical species and precipitation of simple and mixed oxides in the steel matrices for different alloy compositions and dew points. oxidising experiments for each of IF steel, alloy S1 (Fe-1.58 wt.% Mn) and S2 (Fe- 2.52 wt.% Mn) were done in Hot Dip Process Simulator (HDPS) at different temperature and dew point combinations to determine the suitable environment for optimum Wustite formation. Characterisation of the oxidised samples has been done using GA-XRD and Raman Spectroscopy. Thermo Gravimetric Analysis has been done by heating the samples at 15 K/min and holding them at the peak temperatures of 650 oC,750 oC and 850 oC for 2 hours in an atmosphere of Ar+CO+CO₂, having CO₂/CO ratio of 1, 2 and 3 followed by cooling at 15 K/min.