鋼の連続鋳造方法

Japanese Patent JP7283633

B2

Provided is a continuous casting method of steel that prevents surface cracking simultaneously with ensuring the internal quality of slabs obtained by continuous casting at a higher speed by using a vertical liquid bending type continuous casting machine even if the slabs are extra-thick slabs.A continuous casting method of steel according to the present invention is a continuous casting method of steel of continuously casting a slab by using a vertical liquid bending type continuous casting machine, in which when performing continuous casting while, by using an in-mold electromagnetic stirring device, applying an alternating-current moving magnetic field that moves in a width direction of a mold to molten steel inside the mold, inducing a swirling flow in the molten steel, and stirring the molten steel, a travel speed of the alternating-current moving magnetic field that is calculated by Formula (1) below is 0.20 to 1.50 m/s. Here, in Formula (1), U is the travel speed (m/s) of the alternating-current moving magnetic field, τ is a distance (m) between magnetic poles of a coil of the in-mold electromagnetic stirring device, and f is a frequency (Hz) of an electric current that is applied to the coil of the in-mold electromagnetic stirring device. U=2τf

Naoya Shibuta
Satoshi Ohyama
Yoshiyuki Tanaka
Akitoshi Matsui

JP2022514551A

May 30, 2023

November 29, 2021

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JFE Steel Corporation

B22D11/115; B22D11/04; B22D11/20

JP2018103198A
JP11277197A
JP2000015413A

Tetsuro Isomura
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori

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