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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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公开(公告)号：US09605331B2
公开(公告)日：2017-03-28
申请号：US14369143
申请日：2012-12-27
发明人： Seiko Nara , Toshio Ishii , Shinji Koseki , Katsuhiro Takebayashi , Naoki Nakata , Hiroyuki Fukuda , Eitaro Shidara , Takashi Wada
IPC分类号： C21D9/00 , C21D9/46 , C21D9/673 , F27B5/06 , F27B5/14 , F27B17/00 , F27B11/00 , F27B5/04 , F27D5/00 , F27D9/00
CPC分类号： C21D9/0062 , C21D9/0025 , C21D9/0068 , C21D9/46 , C21D9/673 , F27B5/04 , F27B5/06 , F27B5/14 , F27B11/00 , F27B17/0016 , F27D5/0006 , F27D9/00 , F27D2009/0008 , F27D2009/0018
摘要： A batch annealing furnace includes a coil support base on which an end face of a coil is mounted and that supports the coil with an axis of the coil being upright, an inner cover that covers an entire body of the coil mounted on the coil support base, and a cooling pipe that extends downward from the upper part of the inner cover to a cavity of the inner peripheral part of the coil mounted on the coil support base and cools the coil from the inner surface side by passing a coolant through the inside of the cooling pipe.
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公开(公告)号：US20150247227A1
公开(公告)日：2015-09-03
申请号：US14433727
申请日：2013-10-03
IPC分类号： C22C38/54 , C21D1/18 , C21D1/60 , C21D6/00 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/08
CPC分类号： C22C38/54 , C21D1/00 , C21D1/18 , C21D1/60 , C21D6/001 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/105 , C21D9/08 , C21D9/085 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50
摘要： A method for manufacturing a heavy wall steel pipe includes a cooling step in which a steel pipe, with a wall thickness of ½ inch or more, that has been heated to the gamma range is dipped in water while supporting and rotating the steel pipe about the axis of pipe, an axial stream which is a water flow in the direction of axis of pipe is applied to the inside surface of the steel pipe under rotation in the water, and an impinging stream which is a water flow impinging on the outer surface of the pipe is applied to the outer surface of the steel pipe under rotation in the water.
摘要翻译： 制造厚壁钢管的方法包括冷却步骤，其中将加热到γ范围的壁厚为1/2英寸或更大的钢管浸入水中，同时支撑和旋转钢管周围的钢管 在管的轴线方向上作为沿管轴方向的水流的轴向流被施加到在水中旋转的钢管的内表面，并且作为水流的撞击流，撞击在水的外表面上 该管在水中旋转时被施加到钢管的外表面。
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公开(公告)号：US11441203B2
公开(公告)日：2022-09-13
申请号：US16954273
申请日：2018-11-20
摘要： The invention is intended to provide a method for quenching a steel pipe, equipment for quenching a steel pipe, and a method of manufacturing a steel pipe that enable a steel pipe to be conveyed at high speed. The method for quenching a steel pipe includes the steps of: conveying a steel pipe onto a rotatable supporting member using a walking-arm type revolving conveyance apparatus; and rapidly cooling the steel pipe with first spray nozzles disposed above the pipe while the steel pipe is being rotated about a pipe axis of the steel pipe on the rotatable supporting member in a state where movements of the steel pipe in a direction parallel to and in a direction perpendicular to the pipe axis are stopped.
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公开(公告)号：US10214795B2
公开(公告)日：2019-02-26
申请号：US14770664
申请日：2014-03-25
IPC分类号： C21D9/04 , B21B1/085 , B21B45/02 , C21D1/18 , C22C38/00 , C21D1/62 , C21D1/667 , C21D1/56 , C21D6/00 , C22C38/50
摘要： Rail manufacturing method performs, on at least a head of the rail that is hot after hot-rolled at an austenite region temperature or higher or after heated to the austenite region temperature or higher, forced cooling: for 10 seconds from start of the forced cooling so that a cooling rate at a surface of the head becomes 1° C./s to 20° C./s; during a period after a lapse of 10 seconds from the start until heat generation during transformation begins at the surface so that the cooling rate becomes 1° C./s to 5° C./s; during transformation from beginning to end of the heat generation during transformation so that the cooling rate becomes lower than 1° C./s or a temperature-rising rate becomes 5° C./s or lower; and during a period after the end of the heat generation during transformation until temperature at the surface becomes 450° C. or lower so that the cooling rate becomes 1° C./s to 20° C./s.
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6.发明申请公开(公告)号：US20180327880A1
公开(公告)日：2018-11-15
申请号：US15573885
申请日：2016-05-02
发明人： Kenji Okushiro , Hiroyuki Fukuda , Hideo Kijima , Yoshikazu Yoshida , Hiroshi Ishikawa , Sadanori Nakano
CPC分类号： C21D9/04 , B21B1/085 , B21B45/0203 , B21B2045/0212 , B21B2045/0221 , C21D1/00 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/60
摘要： A method of producing a steel material, wherein when a cooling apparatus having a plurality of cooling sections disposed side by side in a longitudinal direction of a steel material cools the steel material hot worked or cooled/reheated, the steel material is conveyed at a conveyance distance Lo (m) satisfying Equation (1), in one direction along with the longitudinal direction of the steel material, in the cooling apparatus, wherein Lo is defined as conveyance distance (m) of steel material, m is a natural number, and Lh is defined as length (m) of cooling sections in longitudinal direction of steel material: (m−0.20)×Lh≤Lo≤(m+0.20)×Lh (1).
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公开(公告)号：US11230747B2
公开(公告)日：2022-01-25
申请号：US15544382
申请日：2016-01-06
发明人： Hiroyuki Fukuda , Hideo Kijima
摘要： A method quenches a steel pipe and an apparatus quenches a steel pipe by which a steel pipe having excellent and uniform quality can be acquired by applying uniform rapid cooling to the steel pipe in a longitudinal direction as well as in a circumferential direction of the steel pipe using a simple unit. Movements of a heated steel pipe in a direction parallel to and in a direction perpendicular to a pipe axis of the steel pipe are stopped, and cooling water is jetted onto an outer surface of the steel pipe from four or more spray nozzles arranged spirally outside the steel pipe while rotating the steel pipe about the pipe axis.
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公开(公告)号：US20210087643A1
公开(公告)日：2021-03-25
申请号：US16954273
申请日：2018-11-20
摘要： The invention is intended to provide a method for quenching a steel pipe, equipment for quenching a steel pipe, and a method of manufacturing a steel pipe that enable a steel pipe to be conveyed at high speed. The method for quenching a steel pipe includes the steps of: conveying a steel pipe onto a rotatable supporting member using a walking-arm type revolving conveyance apparatus; and rapidly cooling the steel pipe with first spray nozzles disposed above the pipe while the steel pipe is being rotated about a pipe axis of the steel pipe on the rotatable supporting member in a state where movements of the steel pipe in a direction parallel to and in a direction perpendicular to the pipe axis are stopped.
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公开(公告)号：US20230221231A1
公开(公告)日：2023-07-13
申请号：US18009523
申请日：2021-03-08
发明人： Kenichi Osuka , Hiroyuki Fukuda , Satoshi Ueoka
CPC分类号： G01N3/40 , C21D1/18 , G01N25/18 , C21D11/005 , C21D9/04 , G01N2203/0076 , G01N2203/0212 , G01N2203/0222
摘要： The hardness of a rail after the rail having a temperature equal to or higher than an austenite region temperature is forcibly cooled in a cooling facility is predicted. A plurality of sets of data for learning composed of a cooling condition data set and output data of hardness are acquired using a model that performs computing by using a cooling condition data set having at least a surface temperature of the rail before the start of cooling and the operating conditions of the cooling facility as input data and the hardness inside the rail after the forced cooling as output data.
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10.发明申请公开(公告)号：US20220112571A1
公开(公告)日：2022-04-14
申请号：US17552058
申请日：2021-12-15
发明人： Kenji Okushiro , Hiroyuki Fukuda , Hideo Kijima , Yoshikazu Yoshida , Hiroshi Ishikawa , Sadanori Nakano
IPC分类号： C21D9/04 , B21B1/085 , C21D1/00 , B21B45/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14
摘要： A method of producing a steel material, wherein when a cooling apparatus having a plurality of cooling sections disposed side by side in a longitudinal direction of a steel material cools the steel material hot worked or cooled/reheated, the steel material is conveyed at a conveyance distance Lo (m) satisfying Equation (1), in one direction along with the longitudinal direction of the steel material, in the cooling apparatus, wherein Lo is defined as conveyance distance (m) of steel material, m is a natural number, and Lh is defined as length (m) of cooling sections in longitudinal direction of steel material: (m−0.20)×Lh≤Lo(m+0.20)×Lh (1).
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