DEOXIDIZING ABILITY OF CARBON IN FE-C-O MELTS AT P-INFINITY=0.01-0.03PA

The Fe-C alloys were prepared using the method of the isothermal melti ng in a vacuum induction furnace in crucible made of magnesium, alumin ium and yttrium oxides. The distribution of Mg, Al and Si between the surface nd the bulk of specimens was studied by the method of X-Fay ph otoelectronic spectroscopy. The existence of films of MgO. Al2O3 and S iO2 on the surface of melts has been established. The distribution of oxygen between the surface and bulk of. the metal was investigated by the laser-mass-spectroscopy. It has been found that the oxygen concent ration in the surface exceeds 2-6 times that in the bulk. It has been proved once more that there is a discrepancy between the theoretical a nd experimental values of deoxidizing ability of carbon in Fe-C-O melt s in vacuum, which can be attributed to the additional resistance to d esorption of carbon monoxide through the oxide film on the surface of melt.