Abstract
The decarburization of liquid iron with preliminary saturation and without saturation of the metal with hydrogen followed by vacuum and aspiration treatments has been studied. A decrease in the gas pressure above the liquid metal is experimentally shown to increase the deoxidizing capacity of carbon only to certain limits. When a steel is subjected to hydrogen treatment with preliminary saturation of the melt with hydrogen, the formation of hydrogen bubbles enhance the effect of the mixing of the metal bath and substantially increase the melt-gas interface area. As a result, the rate and degree of decarburization increase considerably. The aspiration treatment also makes it possible to decrease the carbon content in the metal due to the creation of an additional reaction surface in the volume of the melt under vacuum conditions.
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