Research of Mold Powder for Ultra-Low Carbon Steel

This paper explained the mechanism of carbon pickup by ultra-low-carbon steels during continuous casting and indicated that the major cause of carbon pickup is the contact of the molten steel with the enriched-carbon layer of the powder.Forming of the enriched-carbon layer is due to the existing of "carbon core".Accordingly,the measures to reduce the carbon content and amount of the enriched-carbon layer were investigated.A kind of new powder has been developed and successfully used to minimize the carbon pickup by ultra-low carbon steels during continuous casting.