CaC_2-CaF_2 フラックスによる Fe-Cr-C 合金の脱りん

概要

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ESR experiment was made, in which CaC_2-CaF_2 flux was used as an electro-flux under an inert atmosphere. Fe-C alloys containing Cr up to 64% were remelted. P and N contents as well as O and S ones of the alloys were found to be reduced during the remelting. Simultaneously, carbon pick-up was observed, indicating that CaC_2 was decomposed into Ca metal dissolved in CaF_2 melt and C in the liquid alloy. The refining ability of CaC_2, therfore, was equivalent to that of Ca metal. The degree of phosphorus removal was determined only by the rate of CaC_2 decomposition which was evaluated as a function of the feeding rate of CaC_2 powder and the activity of carbon dissolved in the liquid alloy. Practical applications of CaC_2-CaF_2 flux as a new dephosphorizing reagent in refining processes were discussed.
社団法人日本鉄鋼協会の論文
1977-12-01