Jfe Steel Corporation

Kabushiki Kaisha Sega

Ryosuke Masuda

Akitoshi Matsui

Yoshinari Hashimoto

Taiga Koriyama

Tatsuro Hayashida

Shugo Morita

Ryo Morishita

Takehide Hirata

Miho Sato

Hideyuki Oyamada

Shunpei Shigeno

Koki Uchida

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.

In-mold solidified shell thickness estimation apparatus, in-mold solidified shell thickness estimation method, and continuous steel casting method

A breakout prediction method includes: a step of inputting a dimension of a solid product withdrawn from a mold in a continuous casting machine; a step of detecting a temperature of the mold by a plurality of thermometers embedded in the mold; a step of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.

Breakout prediction method, operation method of continuous casting machine, and breakout prediction device

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.

Control method for continuous casting machine, control device for continuous casting machine, and manufacturing method for casting

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.

Device for estimating solidified shell thickness in mold, and method for estimating solidified shell thickness in mold

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&#xb0; C. or lower.

Continuous casting method of cast slab

An image processing apparatus including image creation means (S) for creating an animated image of a character in accordance with shape data of the character (S) shifting with a predetermined motion in a virtual space, motion data (S) indicating the predetermined action, and shift amount data (S) of a shift amount for each of the predetermined actions of the character, and reproduction/display means (S) for displaying the animated images of the characters on display means. The characters have shapes different in size. The motion data is common to all the characters. The shift amount data is set to a shift amount proportional to the character size. The reproduction/display means changes the reproduction speed (S) of the animated image of the character created by the image creation means, in accordance with the shift amount data of the character.

Growing community of inventors

Tokyo, Japan

Ryosuke Masuda