炭素螺旋式眞空熔融爐に依る鋼中酸素定量方法の精密度に就て

概要

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The determination of oxygen in steel is highly important for the study of steel making reactions, and the most appropriate means of determination is the vacuum-fus on method. Among several types of vacuum-fusion furnaces the authors adopted a carbon-spiral-furnace which was not so expensive, and examined the accuracy of our apparatus. The results was satisfactory as follows : The graphite crucible is heated and degassed at 2000∿2100℃ for 2.5∿3 hours till the pressure in the furnace becomes the order of 10^<-4> mm Hg. When the temperature is lowered to the experimental temperature of 1600∿1700℃, the pressure in the furnace reaches the order of 10^<-5> mm Hg, and shows the blank value of 0.10∿0.05 cc CO/15 mn at room temperature. By the use of the present carbon-spiral furnace, the 98% oxygen inclusion of the pure Fe_2O_3 powder and the 97% of the pure SiO_2 powder may be extracted.
社団法人日本鉄鋼協会の論文
1941-10-25