| 摘要 |
A submerged entry nozzle for continuous casting is provided to produce a casting slab with high quality by minimizing rapid changes of a flow rate and a pressure of molten steel in an immersed entry nozzle and improving channeling of molten steel in a discharge part. An immersed entry nozzle(100) for continuous casting comprises an upper part(a) in which a flow path with a constant cross-sectional area is formed, a conversion part(b) which is connected to the upper part, and which has gradually thin nozzle wall surfaces(e3) expanding to both sides to form flow paths with an increased cross-sectional area as it goes from the upper part to the lower part, a lower part(c) which is connected to the conversion part without a cross-sectional change, and which has molten steel discharge ports(120,130) formed at both sides thereof, a separation member(140) installed on a lower end of the lower part to dualize a flow of molten steel into the discharge port sides, and an inner diameter section(d) with a flower patterned cross-sectional shape including circular grooves(150) radially formed in a predetermined section to prevent channeling of molten steel or adhesion of inclusions to molten steel passing through the nozzle in the continuous casting process, wherein the flower patterned inner diameter section is formed in such a way that facing two to four pairs of flower patterned circular grooves are continuously formed from a point spaced apart from the top of the nozzle in a predetermined distance(l) to a lower end of the conversion part, and flow patterns(152) gradually disappear as it goes from an upper end to the lower end in the conversion part.
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