The invention discloses a
continuous casting method for improving a central shrinkage cavity of a small high-
carbon steel square billet. According to the
continuous casting method for improving the central shrinkage cavity of the small high-
carbon steel square billet, the degree of superheat, the amount of blown
argon of a submersed
nozzle and full-protection
casting are controlled, the cooling specific
water flow for secondary cooling and
casting speed are adjusted, and soft reduction of the final stage of
electromagnetic stirring and solidification of each crystallizer is carried out. The specific technological parameters are that the amount of blown
argon of the submersed
nozzle is controlled to be 15-20L / min under the condition that the full-protection
casting is adopted, the average casting speed of a casting blank corresponding to each crystallizer is 2.6-3.0m / min, the cooling specific
water flow of cooling water in the secondary cooling section of each crystallizer is 0.8-1.2L / kg, and
aerosol cooling is carried out; casting with the low degree of superheat is adopted in the whole process, the degree of superheat is 20-40 DEC C, and soft reduction of the final stage of the crystallizer
electromagnetic stirring under the condition of 460-480 A and 5-7Hz and solidification under the 0.4-4.5m condition is adopted. The
continuous casting method for improving the central shrinkage cavity of the small high-
carbon steel square billet has the advantages that the flow of the inlet gas and the specific
water flow can be accurately controlled, cost is reduced, and products meeting all specifications are produced through adjustment of all parameters.