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    • 3. 发明专利
    • For continuous casting immersion nozzle and continuous casting method using the same
    • JP5360334B1
    • 2013-12-04
    • JP2013524302
    • 2012-12-28
    • Jfeスチール株式会社
    • 浩 淡路谷淳 久保田
    • B22D11/10
    • B22D41/505
    • The purpose of the present invention is to provide a continuous-casting immersion nozzle that excels in anti-spalling properties and alumina adhesion prevention properties, and a continuous casting method that uses the nozzle. This continuous-casting immersion nozzle is provided with a pair of discharge holes that are provided near the bottom and on the sides of a surface of an inner wall that constitutes a cylindrical flow path for molten metal, and that are bilaterally symmetric with respect to a central axis. The immersion nozzle is continuously configured over the entire height direction thereof using a material B. The inner wall surface comprises a region (B) formed using the material B, and a region (A) formed using a material different from the material B. The coefficient of linear expansion at 1500°C of the material that constitutes the region (A) is greater than the coefficient of linear expansion at 1500°C of the material B. The difference between the average value in the height direction of the coefficient of linear expansion of the inner wall surface at 1500°C and the average value in the height direction of the coefficient of linear expansion of the inner wall surface at 900°C is 0.40-0.60%.