摘要
A technique of treating steel with rare earth fluoride complex additives（REFCA）,effects andinflunce factors have been studied.REFCA play a role on controlling inclusion morphology,purifying themolten steel and improving properties of steel.The optimum composition of REFCA is REF<sub>3</sub> 42%;CaO33%;SiCa 25%,and the amount of REF<sub>3</sub> is 0.5 wt%～0.6 wt% of steel.
A technique of treating steel with rare earth fluoride complex additives(REFCA),effects and influnce factors have been studied.REFCA play a role on controlling inclusion morphology,purifying the molten steel and improving properties of steel.The optimum composition of REFCA is REF_3 42%;CaO 33%;SiCa 25%,and the amount of REF_3 is 0.5 wt%～0.6 wt% of steel.
