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：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.