製鋼過程に於ける鋼中の水素及窒素に關する研究(第 2 報) : 平爐精錬中の熔鋼への水素浸入機構

概要

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By mearsuring gas contained in open-hearth slag, the relation of such gas and hydrogen content in molten steel is studied, and it is investigated that four kinds of gas, viz, H_2O, CO, CO_2 and H_2, are contained in the slag and maintain mutually a balance represented approximately by the following formula CO+H_2O⇄CO_2+H_2 H_2O contained in the slag is that which was absorbed from furnace atmosphere, in which 5∿10% of water is usually contained. If boiling of molten steel is vigorous, CO in the slag increases and H_2O decreases. The hydrogen content in molten steel is proportional to the partial pressure of H_2+H_2O contained in gas in the slag and is inversely proportional to the FeO content in molten steel. Consequently, hydrogen increases as a result of the declination of boiling activity due to the decrease of oxygen content in molten steel. Especially, by killing the molten steel for a long duration, the hydrogen content increases considerably.
社団法人日本鉄鋼協会の論文
1938-03-25