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公开(公告)号：US11724307B2
公开(公告)日：2023-08-15
申请号：US17440150
申请日：2020-03-03
发明人： Ryosuke Masuda , Yoshinari Hashimoto , Akitoshi Matsui , Shugo Morita , Tatsuro Hayashida , Taiga Koriyama
IPC分类号： B22D11/18
CPC分类号： B22D11/188 , B22D11/182
摘要： 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.
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2.发明申请公开(公告)号：US20210332463A1
公开(公告)日：2021-10-28
申请号：US17281075
申请日：2019-09-05
摘要： Provided is a non-oriented electrical steel sheet having such a low Al concentration so that it is excellent in terms of the recycling efficiency of scrap iron and having a high magnetic flux density and low iron loss.
The non-oriented electrical steel sheet according to the present invention has a chemical composition containing C; 0.0050 mass % or less, Si; 1.5 mass % to 5.0 mass %, Mn; 0.2 mass % to 3.0 mass %, sol.Al; 0.0030 mass % or less, P; 0.2 mass % or less, S; 0.0050 mass % or less, N; 0.0040 mass % or less, T.Ca; 0.0010 mass % to 0.0080 mass %, T.O; 0.0100 mass % or less, REM; 0.0001 mass % to 0.0050 mass %, and a balance of Fe and inevitable impurities, in which a value of a mass-related fractional expression ((T.Ca+REM)/(T.O+S)), which is a relational expression for the masses of the four constituents described above, that is, T.Ca, REM, T.O, and S, is 0.4 or more.-
公开(公告)号：US11925974B2
公开(公告)日：2024-03-12
申请号：US18009909
申请日：2021-04-09
发明人： Ryosuke Masuda , Yoshinari Hashimoto , Akitoshi Matsui , Shugo Morita , Tatsuro Hayashida , Taiga Koriyama , Takehide Hirata
CPC分类号： B22D11/182 , B22D2/00 , B22D11/04
摘要： 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.
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公开(公告)号：US11890671B2
公开(公告)日：2024-02-06
申请号：US17422674
申请日：2020-02-06
发明人： Ryosuke Masuda , Yoshinari Hashimoto , Akitoshi Matsui , Shugo Morita , Tatsuro Hayashida , Taiga Koriyama , Ryo Morishita
IPC分类号： B22D11/18 , B22D11/115 , G05B15/02
CPC分类号： B22D11/18 , B22D11/115 , G05B15/02
摘要： 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.
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公开(公告)号：US11648607B2
公开(公告)日：2023-05-16
申请号：US17436199
申请日：2020-02-28
发明人： Akitoshi Matsui , Shugo Morita , Tatsuro Hayashida , Yoshinari Hashimoto , Ryosuke Masuda , Taiga Koriyama , Ryo Morishita
IPC分类号： B22D11/20 , B22D11/115
CPC分类号： B22D11/20 , B22D11/115
摘要： 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.
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公开(公告)号：US11759851B2
公开(公告)日：2023-09-19
申请号：US17600899
申请日：2020-03-27
发明人： Shuhei Irie , Satoshi Ueoka , Hirokazu Sugihara , Hiroyuki Fukuda , Norichika Aramaki , Akitoshi Matsui , Kenichi Osuka , Sho Kokufu
IPC分类号： B22D11/124 , B22D11/14
CPC分类号： B22D11/124 , B22D11/142
摘要： A method for continuously casting steel capable of reducing center segregation that occurs in a slab. In a section in a continuous casting machine in a slab withdrawal direction, a section from a start point at which the average value of solid phase ratios along a thickness direction at a widthwise center of a slab is within a range of 0.4 or more and 0.8 or less to an end point at which the average value of solid phase ratios along the thickness direction at the widthwise center of the slab is greater than the average value of solid phase ratios at the start point and is 1.0 or less is set as a first section. The slab is cooled by water in the first section at a water flow rate per surface area of the slab within a range of 50 L/(m2×min) or more and 2,000 L/(m2×min) or less.
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