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1. 发明公开

EP4006180A1 HIGH-STRENGTH STEEL SHEET FOR SOUR RESISTANT LINE PIPE, MANUFACTURING METHOD THEREOF, AND HIGH-STRENGTH STEEL PIPE MADE USING HIGH-STRENGTH STEEL SHEET FOR SOUR RESISTANT LINE PIPE 审中-公开
公开(公告)号：EP4006180A1
公开(公告)日：2022-06-01
申请号：EP20846097.2
申请日：2020-07-20
申请人： JFE Steel Corporation
发明人： IZUMI, Daichi , SHIMAMURA, Junji , TAMURA, Yuta , IHARA, Koichi , TANIZAWA, Akihiko
IPC分类号： C21D8/02 , C22C38/00 , C22C38/12 , C22C38/58
摘要： Provided is a high strength steel plate for a sour-resistant line pipe excellent not only in HIC resistance but also in SSCC resistance in environments containing hydrogen sulfide of more than 1 bar and in SSCC resistance in environments with a low hydrogen sulfide partial pressure of 1 bar. The steel plate comprises a chemical composition containing, in mass%, C: 0.020 % to 0.080 %, Si: 0.01 % to 0.50 %, Mn: 0.50 % to 1.80 %, P: 0.015 % or less, S: 0.0015 % or less, Al: 0.010 % to 0.080 %, N: 0.0010 % to 0.0080 %, Mo: 0.01 % to 0.50 %, and Ca: 0.0005 % to 0.0050 %, with a balance consisting of Fe and inevitable impurities, wherein a steel microstructure at 0.25 mm below a surface of the steel plate is bainitic microstructure, and an area ratio of crystal grains having a KAM value of 0.4 or more in the bainite is 50 % or less, maximum Vickers hardness at 0.25 mm below the surface of the steel plate is 230 Hv or less, and a tensile strength is 520 MPa or more.

2. 发明授权

EP2837706B1 HOT-ROLLED STEEL PLATE FOR SQUARE STEEL TUBE FOR USE AS BUILIDING STRUCTURAL MEMBER AND PROCESS FOR PRODUCING SAME 有权
公开(公告)号：EP2837706B1
公开(公告)日：2019-06-05
申请号：EP12874301.0
申请日：2012-04-12
申请人： JFE Steel Corporation
发明人： KAMI, Chikara , TAMURA, Yuta , TAMAI, Takato , KAWAMURA, Shuji
IPC分类号： C22C38/00 , C21D8/02 , C22C38/06 , C22C38/14 , C22C38/12 , C21D6/00 , C21D9/46

3. 发明公开

EP4275805A1 METHOD OF GENERATING STEEL-PLATE MATERIAL PREDICTION MODEL, MATERIAL PREDICTION METHOD, MANUFACTURING METHOD, AND MANUFACTURING FACILITY 审中-实审
公开(公告)号：EP4275805A1
公开(公告)日：2023-11-15
申请号：EP22779549.9
申请日：2022-02-08
申请人： JFE Steel Corporation
发明人： UEOKA, Satoshi , TAMURA, Yuta , NOJIMA, Yusuke , HIRANO, Takahiro , TAKEMURA, Yusaku , KURIMOTO, Atsushi
IPC分类号： B21B37/00 , B21B37/76 , B21B38/00 , B21B45/02 , B21C51/00
摘要： A method for generating a steel sheet material quality prediction model according to the present invention is a method for generating a steel sheet material quality prediction model in steel sheet cooling equipment including a water cooling device that cools a steel sheet by jetting cooling water to a heated steel sheet and a temperature measurement device that measures a surface temperature of the steel sheet in a cooling process, the method including a step of generating a material quality prediction model of the steel sheet after having passed through the cooling equipment with machine learning using a plurality of learning data in which a surface temperature information data set including actual measurement data of a surface temperature at a reference point set in advance on the steel sheet and actual measurement data of a surface temperature at a referring point set based on the reference point is set as input result data and material quality information of the steel sheet after having passed through the cooling equipment in a position corresponding to the reference point on the steel sheet corresponding to the input result data is set as output actual data.

4. 发明公开

EP2979770A1 THICK STEEL PLATE MANUFACTURING DEVICE AND MANUFACTURING METHOD 有权
标题翻译： VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG DICKER STAHLPLATTEN
公开(公告)号：EP2979770A1
公开(公告)日：2016-02-03
申请号：EP14775597.9
申请日：2014-03-20
申请人： JFE Steel Corporation
发明人： TAMURA, Yuta , FUKUDA, Hiroyuki , ADACHI, Kenji
IPC分类号： B21B45/08 , B21B1/38 , B21B45/02
CPC分类号： B21B45/0218 , B21B37/76 , B21B45/08 , B21B2001/225 , B21B2015/0071
摘要： It is an object to provide a facility and a method for manufacturing a steel plate which perform uniform cooling in a cooling step by uniformizing scale formed on a surface of the steel plate in a descaling step, to manufacture the steel plate having excellent shape.
A facility for manufacturing a steel plate includes a hot rolling apparatus, a shape correcting apparatus, a descaling apparatus and an accelerated cooling apparatus which are disposed in this order from an upstream side in a conveyance direction, wherein an energy density E of cooling water that is jetted towards a surface of a steel plate by the descaling apparatus is greater than or equal to 0.10 J/mm 2 .
摘要翻译：本发明的目的是提供一种用于制造钢板的设备和方法，该钢板在除锈步骤中通过使形成在钢板表面上的氧化皮均匀化而在冷却步骤中进行均匀冷却，以制造具有优异形状的钢板。钢板的制造装置包括从输送方向的上游侧依次配置的热轧装置，形状校正装置，除锈装置和加速冷却装置，其中，冷却水的能量密度E 通过除垢装置向钢板表面喷射时，大于或等于0.10J / mm 2。

5. 发明公开

EP3409389A1 PRODUCTION EQUIPMENT LINE FOR HOT-ROLLED STEEL STRIPS AND PRODUCTION METHOD FOR HOT-ROLLED STEEL STRIP 有权
公开(公告)号：EP3409389A1
公开(公告)日：2018-12-05
申请号：EP17743996.5
申请日：2017-01-16
申请人： JFE Steel Corporation
发明人： UEOKA, Satoshi , TAMURA, Yuta , SHIRASAKI, Sonomi , KATAYAMA, Yukako , MATSUMOTO, Takashi
IPC分类号： B21B45/02 , B21B1/26
CPC分类号： B21B45/0218 , B21B1/26 , B21B37/74 , B21B45/0233 , B21B2001/225
摘要： A production equipment line for a hot-rolled steel strip comprises a rough rolling mill group 3 comprised of plural rough rolling mills 31 and 32 for hot rolling a material to be rolled 10 which is heated up to a predetermined temperature to a finish rolling start sheet thickness and a finish rolling mill group 6 comprised of plural finish rolling mills for controlled-rolling the material to be rolled to a final sheet thickness, wherein at least one of the plural rough rolling mills is a reversible rolling mill 31. The production equipment line for a hot-rolled steel strip is provided on an upstream side or a downstream side of the reversible rolling mill 31 with a slow cooling apparatus 42 for slowly cooling the material to be rolled at a water volume density of less than 1000 L/min • m 2 and a rapid cooling apparatus 41 which is arranged next to the slow cooling apparatus in a rolling direction and rapidly cools the material to be rolled after the slow-cooling at a water volume density of not less than 1000 L/min • m 2 .

6. 发明公开

EP3195946A1 THICK STEEL PLATE MANUFACTURING FACILITY AND MANUFACTURING METHOD 有权
标题翻译：厚钢板制造设备及制造方法
公开(公告)号：EP3195946A1
公开(公告)日：2017-07-26
申请号：EP15836765.6
申请日：2015-08-14
申请人： JFE Steel Corporation
发明人： TAMURA, Yuta , FUKUDA, Hiroyuki , ADACHI, Kenji
IPC分类号： B21B45/08 , B21B1/38 , B21B45/02
CPC分类号： B21B1/38 , B21B45/02 , B21B45/06 , B21B45/08
摘要： It is an object to provide a facility and a method for manufacturing a steel plate having excellent shapes and excellent mechanical properties, by performing uniform cooling in a cooling step by uniformizing scales that are generated on surfaces of the steel plate in a descaling step.
A facility for manufacturing a steel plate includes a hot rolling apparatus, a shape correcting apparatus, a descaling apparatus, and an accelerated cooling apparatus which are set in this order from an upstream side in a conveyance direction, wherein jetting nozzles of the descaling apparatus are set in two rows with respect to a longitudinal direction of a steel plate, and wherein energy density E of descaling water that is jetted towards a surface of the steel plate from the two rows of jetting nozzles is greater than or equal to 0.08 J/mm 2 in total.
摘要翻译：本发明的目的在于提供一种通过在除锈步骤中使在钢板的表面上产生的氧化皮均匀化而在冷却步骤中进行均匀冷却而制造具有优异形状和优异机械性能的钢板的设备和方法。用于制造钢板的设备包括从输送方向的上游侧依次设置的热轧设备，形状修正设备，去氧化皮设备和加速冷却设备，其中去氧化皮设备的喷嘴是相对于钢板的长度方向设置成两列，从两列喷嘴向钢板表面喷射的去氧化皮水的能量密度E为0.08J / mm2以上总共。

7. 发明公开

EP2837706A1 HOT-ROLLED STEEL PLATE FOR SQUARE STEEL TUBE FOR USE AS BUILIDING STRUCTURAL MEMBER AND PROCESS FOR PRODUCING SAME 审中-公开
标题翻译：用于方形钢管的热轧钢板，用作制造结构构件及生产相同工艺的方法
公开(公告)号：EP2837706A1
公开(公告)日：2015-02-18
申请号：EP12874301.0
申请日：2012-04-12
申请人： JFE Steel Corporation
发明人： KAMI, Chikara , TAMURA, Yuta , TAMAI, Takato , KAWAMURA, Shuji
IPC分类号： C22C38/00 , C21D8/02 , C22C38/06 , C22C38/14
CPC分类号： C21D8/0263 , C21D6/005 , C21D6/008 , C21D8/0226 , C21D9/46 , C21D2211/005 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , E04C3/32
摘要： A hot rolled steel sheet suitable as a raw material for a square column for building structural members is provided. A steel having a composition of, in terms of % by mass, C: 0.07 to 0.18%, Mn: 0.3 to 1.5%, Al: 0.01 to 0.06%, N: 0.006% or less is heated to 1100 to 1300°C, rough-rolled at a rough rolling end temperature of 950 to 1150°C, and finish-rolled at a finish rolling start temperature of 1100 to 850°C and a finish rolling end temperature of 900 to 750°C to obtain a hot rolled sheet. Immediately after completion of the finish rolling, cooling is started. The cooling is performed in such a way that the average cooling rate at the surface is 20°C/s or less, the time taken for the temperature at the sheet thickness center to reach 650°C is within 30 s, and the average cooling rate at the sheet thickness center is 4 to 15°C/s. The resulting sheet is coiled at 500 to 650°C and allowed to cool to obtain a hot rolled steel sheet. As a result, the hot rolled steel sheet comes to have a microstructure that includes a primary phase constituted by ferrite and a second phase constituted by pearlite or pearlite and bainite, a second phase frequency of 0.20 to 0.42, and a mean crystal grain diameter of 7 to 15 µm for the primary phase and the second phase together. A square column manufactured by cold-forming this hot rolled steel sheet exhibits a low yield ratio and high toughness.
摘要翻译：提供适合作为建筑构件用方柱的原料的热轧钢板。将以质量％计含有C：0.07〜0.18％，Mn：0.3〜1.5％，Al：0.01〜0.06％，N：0.006％以下的钢加热至1100〜1300℃，在粗轧终了温度950〜1150℃下进行粗轧后，在精轧开始温度1100〜850℃，终轧温度900〜750℃下进行精轧，得到热轧板。刚完成精轧后，开始冷却。以表面的平均冷却速度为20℃/ s以下，板厚中心的温度达到650℃的时间为30s以内的方式进行冷却，平均冷却板厚中心的速率为4〜15°C / s。将所得的片材在500〜650℃下卷取并冷却，得到热轧钢板。结果，热轧钢板具有包含由铁素体构成的主相和由珠光体或珠光体和贝氏体构成的第二相的第二相组织，第二相频率为0.20〜0.42，平均结晶粒径为主要阶段和第二阶段一起为7至15微米。通过将该热轧钢板冷成形而制造的方柱表现出低屈服比和高韧性。

8. 发明公开

EP4378603A1 MANUFACTURING METHOD AND MANUFACTURING EQUIPMENT FOR THICK STEEL PLATE 审中-实审
公开(公告)号：EP4378603A1
公开(公告)日：2024-06-05
申请号：EP22869693.6
申请日：2022-07-21
申请人： JFE Steel Corporation
发明人： NOJIMA, Yusuke , TAMURA, Yuta , UEOKA, Satoshi , HIRANO, Takahiro , MIURA, Ken , KURIMOTO, Atsushi
IPC分类号： B21B45/02 , B21B45/06 , B21C51/00 , C21D1/00 , B21B38/00
CPC分类号： B21B45/02 , C21D1/00 , B21B38/00 , B21C51/00 , B21B45/06
摘要： An object is to provide a manufacturing facility and a method for manufacturing in which, without additionally providing an ancillary facility and consuming excessive energy, a film boiling state is maintained until a temperature as lower as possible is reached.
A method for manufacturing a steel plate in which water-cooling is performed on the steel plate. In the method, a water-cooling device that includes a plurality of combinations of at least one pair of upper and lower cooling water injection nozzles arranged in a traveling direction of the steel plate is used. In the method, an injection speed of cooling water of the cooling water injection nozzles is higher than or equal to 0.4 m/s and lower than or equal to 30 m/s to perform the water-cooling on the steel plate.

9. 发明公开

EP4066956A1 MANUFACTURING EQUIPMENT AND MANUFACTURING METHOD FOR STEEL PLATE 审中-公开
公开(公告)号：EP4066956A1
公开(公告)日：2022-10-05
申请号：EP20893260.8
申请日：2020-11-18
申请人： JFE Steel Corporation
发明人： UEOKA, Satoshi , TAMURA, Yuta , NOJIMA, Yusuke , HIRANO, Takahiro , MIURA, Ken , KUMANO, Ori
IPC分类号： B21D1/05 , B21B1/22 , B21B45/02
摘要： To provide manufacturing equipment and a manufacturing method for a steel plate capable of performing more uniform cooling during heat treatment of the steel plate and manufacturing a flat and homogeneous steel plate. Manufacturing equipment (heat treatment equipment (1)) for a steel plate (2) according to an aspect of the present invention is manufacturing equipment for a steel plate (2), in which the steel plate (2) is heat-treated, the equipment including a heating furnace (3) configured to heat the steel plate (2) having a temperature of 100°C or lower, a first flattening device (4) configured to flatten the heated steel plate (2), a quenching device (5) configured to quench the flattened steel plate (2), and a second flattening device (6) configured to flatten the quenched steel plate (2).

10. 发明授权

EP2979769B1 THICK STEEL PLATE MANUFACTURING METHOD AND MANUFACTURING DEVICE 有权
公开(公告)号：EP2979769B1
公开(公告)日：2018-08-15
申请号：EP14773154.1
申请日：2014-03-20
申请人： JFE Steel Corporation
发明人： TAMURA, Yuta , ADACHI, Kenji
IPC分类号： B21B45/08 , B21B45/02
CPC分类号： B21B45/08 , B21B37/74 , B21B45/0203 , B21B45/0218 , B21B2001/225 , B21B2015/0071 , B21B2045/0212 , B21B2261/20
摘要： An object of the present invention is to provide a method and a facility for manufacturing a steel plate by which a high-quality steel plate having less variation in quality can be ensured. A method for manufacturing a steel plate, including a hot-rolling step, a shape correction step and an accelerated cooling step in this order, the method further includes a temperature adjustment step of performing air cooling such that a surface temperature of the steel plate is lowered below the Ar 3 transformation point or performing water cooling by supplying cooling water to upper and lower surfaces of the steel plate at a water amount density of 0.3 to 2.2 m 3 /m 2 ·min between the shape correction step and the accelerated cooling step, to transform the surface of the steel plate and, a descaling step of jetting high pressure water having an energy density of 0.05 J/mm 2 or more to the surfaces of the steel plate after the temperature adjustment step and before the accelerated cooling step.

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