含クロム炭素飽和溶鉄の脱りんに関連した CaO-CaF_2 系フラックス中 CaO・Cr_2O_3 の溶解度

概要

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The solubility of chromium oxide in the CaO-CaF_2 system has been determined at 1773K by equilibrating the flux with a CaO・Cr_2O_3 pellet at the oxygen partial pressure of 2.28×10^<-7> Pa. The solubility of Cr_2O_3 varies from 0.80 to 1.28 mass% in the flux with increasing the CaO content from 15.6 to 20.6 mass%. In case of the dephosphorization of Fe-Cr-C melts with CaO bearing fluxes, the prevailing oxygen partial pressure of the system is controlled by the reaction between CaO and Cr_2O_3 forming CaO・Cr_2O_3. The phosphorus distribution ratio between Fe-Cr-C_<satd.> alloys and CaO-SiO_2-CaF_2 fluxes saturated with CaO・Cr_2O_3, CaO and 3CaO・SiO_2 has been measured at 1573K. The phosphorus and chromium distribution ratios decrease with increasing chromium content of the metal from 1 to 13 mass%.
社団法人日本鉄鋼協会の論文
1994-01-01