鋼の凝固過程における酸化物と硫黄との反応に及ぼす酸化物組成の影響

概要

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In order to elucidate the reaction between oxides and sulphur in molten steel during solidification, the effect of composition of oxides in continuously cast steels has been observed and analyzed. The results obtained are as follows. CaO-SiO_2-Al_2O_3 and CaO-SiO_2 oxides are observed in low Al content steel (Al=0.005mass%) and CaO-Al_2O_3 oxides are observed in high Al content steel (Al=0.031mass%). CaO-SiO_2-Al_2O_3 and CaO-Al_2O_3 oxides have higher S content than CaO-SiO_2 oxides. High S content in oxides was obtained with high liquid fraction and high sulphide capacity of oxides at the solidification temperature of the steel. Because desulphurization by oxides which have high sulphide capacity and high liquid fraction occurs during solidification, S segregated in the center of slab is absorbed by the oxides.
社団法人日本鉄鋼協会の論文
1995-02-01