The invention belongs to the technical field of steel melting
continuous casting production, and particularly relates to
casting powder for a medium carbon peritectic steel
continuous casting crystallizer sensitive to cracks. The
casting powder comprises the following components by weight percentage: 40 to 50 percent of CaO, 40 to 50 percent of SiO2, 1 to 6 percent of B2O, 1 to 4 percent of Li2O, 1 to 5 percent of Al2O3, 1 to 6 percent of BN1 and 1 to 2 percent of inevitable impurities, wherein the impurities comprise 0.03 percent of S and 0.03 percent of P. The preparation method comprises the steps of: fully
drying and dehydrating raw materials, weighing and mixing according to weight parts,
grinding and uniformly mixing, pre-melting, cooling, powdering, and adopting the
conventional casting powder preparing and molding process to obtain granular finished
casting powder. The casting powder has relatively low
melting temperature and relatively high
crystallization temperature, particularly has the advantages of good
lubrication and anti-oxidization effects of glass powder and high
impurity absorption capacity and the advantages of
high heat preservation performance of the powder with the high
crystallization temperature and casting blank crack control, and is suitable for pouring medium carbon peritectic steel sensitive to the cracks.