公开(公告)号：US20250108433A1

公开(公告)日：2025-04-03

申请号：US18832809

申请日：2023-01-25

Applicant: JFE Steel Corporation

Inventor： Ryosuke MASUDA ,  Naoya SHIBUTA ,  Taiga KORIYAMA

IPC: B22D11/16 ,  B22D11/08

Abstract: A continuous casting start timing determination method, a continuous casting facility operation method, a slab manufacturing method, a determining device, a continuous casting start determination system, and a display terminal device are provided. A continuous casting start timing determination method for determining a continuous casting start timing includes: a measurement step of measuring temperatures in a copper plate of a casting mold in the continuous casting facility, by use of a plurality of temperature sensors provided in a casting-direction determination position as a predetermined casting-direction position on the copper plate; and a determination step of determining the start timing based on a casting-direction position of a molten metal surface of molten steel, the casting-direction position being estimated based on measurement results in the measurement step and a width of a slab to be cast in the continuous casting facility.

公开(公告)号：US20220126359A1

公开(公告)日：2022-04-28

申请号：US17436199

申请日：2020-02-28

Applicant: JFE STEEL CORPORATION

Inventor： Akitoshi MATSUI ,  Shugo MORITA ,  Tatsuro HAYASHIDA ,  Yoshinari HASHIMOTO ,  Ryosuke MASUDA ,  Taiga KORIYAMA ,  Ryo MORISHITA

IPC: B22D11/20 ,  B22D11/115

Abstract: A continuously casting method including arranging temperature measuring elements according to specified conditions, selecting as evaluation targets for temperatures of copper plates on a wide face of mold values measured by the temperature measuring elements arranged closer to a center in a width direction of a cast slab than short sides of the cast slab under continuous casting at levels of 50 mm or more lower in a slab withdrawal direction than a meniscus of a molten steel in a mold, and adjusting a casting condition such that a standard deviation of the values measured over the width direction of the copper plates on the wide face of mold at a same level in the slab withdrawal direction is 20° C. or lower.

公开(公告)号：US20220152695A1

公开(公告)日：2022-05-19

申请号：US17440150

申请日：2020-03-03

Applicant: JFE STEEL CORPORATION

Inventor： Ryosuke MASUDA ,  Yoshinari HASHIMOTO ,  Akitoshi MATSUI ,  Shugo MORITA ,  Tatsuro HAYASHIDA ,  Taiga KORIYAMA

IPC: B22D11/18

Abstract: A device includes: an input device configured to receive an input of measurement results of a temperature and components of molten steel in a tundish of continuous casting facilities, measurement results of a width, a thickness, and a casting speed of a cast slab casted in the continuous casting facilities, and molten steel flow rate distribution in a mold; a model database configured to store a model expression and a parameter related to solidification reaction of molten steel in the mold; a convertor configured to convert a molten steel flow rate in the mold into a heat conductivity parameter; and a calculator configured to estimate a solidified shell thickness in the mold based on temperature distribution of the mold and steel in the mold calculated by solving a three-dimensional transient heat conduction equation using the measurement results.

公开(公告)号：US20220333921A1

公开(公告)日：2022-10-20

申请号：US17761642

申请日：2020-09-04

Applicant: JFE STEEL CORPORATION

Inventor： Ryosuke MASUDA ,  Yoshinari HASHIMOTO ,  Akitoshi MATSUI ,  Shugo MORITA ,  Tatsuro HAYASHIDA ,  Taiga KORIYAMA ,  Miho SATO

IPC: G01B21/08 ,  B22D11/22

Abstract: An in-mold solidified shell thickness estimation apparatus includes: an input device; a model database configured to store a model formula and a parameter related to a solidification reaction of a molten steel inside a mold of a continuous casting facility; and a heat transfer model calculator configured to estimate an in-mold solidified shell thickness by calculating temperature distributions of the mold and of the molten steel inside the mold by solving a three-dimensional unsteady heat transfer equation. The heat transfer model calculator is configured to correct errors in a temperature of a mold copper plate and in an amount of heat removed from the mold, by correcting an overall heat transfer coefficient between the mold copper plate and the solidified shell.

公开(公告)号：US20230226600A1

公开(公告)日：2023-07-20

申请号：US18009909

申请日：2021-04-09

Applicant: JFE STEEL CORPORATION

Inventor： Ryosuke MASUDA ,  Yoshinari HASHIMOTO ,  Akitoshi MATSUI ,  Shugo MORITA ,  Tatsuro HAYASHIDA ,  Taiga KORIYAMA ,  Takehide HIRATA

IPC: B22D11/18 ,  B22D11/04 ,  B22D2/00

CPC classification number: B22D11/182 ,  B22D11/04 ,  B22D2/00

Abstract: A breakout prediction method includes: a step of inputting a dimension of a solid product withdrawn from a mold in a continuous casting machine; a step of detecting a temperature of the mold by a plurality of thermometers embedded in the mold; a step of executing interpolation processing on the detected temperatures detected by the plurality of thermometers according to the dimension of the solid product; a step of calculating, based on the temperatures calculated by executing the interpolation processing, a component in a direction orthogonal to an influence coefficient vector obtained by principal component analysis as a degree of deviation from during a normal operation in which a breakout has not occurred; and a step of predicting a breakout based on the degree of deviation.

公开(公告)号：US20210387250A1

公开(公告)日：2021-12-16

申请号：US17422674

申请日：2020-02-06

Applicant: JFE STEEL CORPORATION

Inventor： Ryosuke MASUDA ,  Yoshinari HASHIMOTO ,  Akitoshi MATSUI ,  Shugo MORITA ,  Tatsuro HAYASHIDA ,  Taiga KORIYAMA ,  Ryo MORISHITA

IPC: B22D11/18 ,  B22D11/115 ,  G05B15/02

Abstract: A control method for a continuous casting machine, includes: estimating, by on-line real-time system, a flow state of molten steel in a mold by using an operation condition of a continuous casting machine and temperature data on the molten steel in the mold; calculating, by on-line real-time system, a molten steel flow index based on the estimated flow state of the molten steel, the molten steel flow index being a factor of mixing of an impurity into a casting inside the mold; and controlling the operation condition of the continuous casting machine such that the calculated molten steel flow index is within an appropriate range.