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公开(公告)号：US20240344158A1
公开(公告)日：2024-10-17
申请号：US18579117
申请日：2022-05-11
Applicant: JFE STEEL CORPORATION
Inventor： Hideyuki TAKAHASHI , Soshi YOSHIMOTO
CPC classification number: C21D1/667 , C21D1/18 , C21D9/0062 , C21D2211/008
Abstract: A quenching apparatus for a metal sheet, continuous annealing equipment, a method for quenching a metal sheet, a method for manufacturing a cold rolled steel sheet, and a method for manufacturing a coated steel sheet. The quenching apparatus has a water tank in which the metal sheet is passed and immersed in a liquid to cool the metal sheet, a water injection apparatus placed in the water tank, and plural restraining roll pairs with which the metal sheet that is passed in the water tank is restrained. The water injection apparatus has plural water injection nozzles arranged in a sheet passing direction of the metal sheet on front and back surface sides of the metal sheet. A position of each of the plural restraining roll pairs is separately adjusted with respect to the metal sheet in accordance with operation conditions.
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公开(公告)号：US20220403480A1
公开(公告)日：2022-12-22
申请号：US17821476
申请日：2022-08-23
Applicant: JFE STEEL CORPORATION
Inventor： Gentaro TAKEDA , Yoichi MAKIMIZU , Yoshikazu SUZUKI , Yoshimasa HIMEI , Hideyuki TAKAHASHI
IPC: C21D9/46 , C21D1/26 , C21D1/74 , C21D8/02 , C21D9/00 , C22C38/02 , C23C2/00 , C23C2/06 , C23C2/26 , C23C2/40
Abstract: A continuous hot-dip galvanizing apparatus has a vertical annealing furnace, one or more hearth rolls, a hot-dip galvanizing apparatus, an alloying line, and humidified gas supply ports. When the steel sheet having a Si content of 0.2 mass % or more is conveyed inside the annealing furnace, the humidified gas supply ports positioned in a latter part of the soaking zone supply the humidified gas to the soaking zone and the at least one dry gas supply port supplies the dry gas to the soaking zone. When the steel sheet having a Si content of less than 0.2 mass % is conveyed inside the annealing furnace, the plurality of the humidified gas supply ports do not supply the humidified gas to the soaking zone and the at least one dry gas supply port supplies the dry gas to the soaking zone.
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3.发明申请公开(公告)号：US20200299799A1
公开(公告)日：2020-09-24
申请号：US16605305
申请日：2018-02-19
Applicant: JFE STEEL CORPORATION
Inventor： Gentaro TAKEDA , Yoichi MAKIMIZU , Yoshikazu SUZUKI , Yoshimasa HIMEI , Hideyuki TAKAHASHI
IPC: C21D9/46 , C21D9/00 , C21D1/26 , C21D1/74 , C21D8/02 , C23C2/00 , C23C2/06 , C23C2/26 , C23C2/40 , C22C38/02
Abstract: Provided is a method for producing a galvannealed steel sheet. When the steel sheet passing through the soaking zone is a type of steel containing 0.2 mass % or more of Si, both dry gas and humidified gas are supplied to the soaking zone, where the humidified gas is supplied only from the humidified gas supply port positioned in a latter part of the soaking zone among a plurality of humidified gas supply ports, where the latter part of the soaking zone is determined considering a sheet passing speed V and a target temperature T on the exit side of the soaking zone.
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公开(公告)号：US20180237896A1
公开(公告)日：2018-08-23
申请号：US15753260
申请日：2016-08-05
Applicant: JFE STEEL CORPORATION
Inventor： Gentaro TAKEDA , Hideyuki TAKAHASHI , Yoichi MAKIMIZU , Yoshikazu SUZUKI , Yoshimasa HIMEI
CPC classification number: C23C2/02 , C21D1/76 , C21D9/561 , C21D9/573 , C22C38/00 , C22C38/02 , C22C38/04 , C23C2/06 , C23C2/28 , C23C2/40
Abstract: A method includes: annealing a steel strip by conveying the steel strip through a heating zone, a soaking zone, and a cooling zone in this order inside an annealing furnace; and applying a hot-dip galvanized coating onto the steel strip discharged from the cooling zone. Reducing gas or non-oxidizing gas supplied into the soaking zone includes humidified gas and dry gas. While a width and a sheet passing speed of the steel strip passing through the soaking zone are constant, a variation of pressure in the annealing furnace is suppressed by adjusting a flow rate of the dry gas, and a variation range of an amount of moisture supplied into the soaking zone by the humidified gas is limited to 20% or less.
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5.发明申请公开(公告)号：US20150361544A1
公开(公告)日：2015-12-17
申请号：US14761707
申请日：2014-02-18
Applicant: JFE STEEL CORPORATION
Inventor： Hiroshi MATSUDA , Hideyuki TAKAHASHI , Hiroi YAMAGUCHI , Yasuyuki HAYAKAWA , Takashi TERASHIMA , Yuiko WAKISAKA
CPC classification number: C23C8/38 , C21D1/09 , C21D1/773 , C21D8/12 , C21D8/1255 , C21D9/46 , C21D2201/05 , C22C38/02 , C23C8/02 , C23C8/26 , H01F1/14775 , H01F1/16
Abstract: Provided is an apparatus for continuously nitriding a strip continuously being fed after cold rolling and before secondary recrystallization annealing in a production line of a grain-oriented electrical steel sheet, comprising: a nitriding zone for nitriding the strip; a cooling zone for cooling the strip; and an optional heating zone provided upstream of the nitriding zone for heating the strip, wherein, the nitriding zone is provided with glow discharge electrodes, and by plasma nitriding the strip by glow discharge with the glow discharge electrodes functioning as positive electrodes and the strip functioning as a negative electrode, inhibitor forming elements are uniformly dispersed over the full length and full width of the strip and a grain-oriented electrical steel sheet with excellent magnetic properties with no variation is obtained.
Abstract translation: 本发明提供一种用于在冷轧后连续进料的条带和在取向电工钢板的生产线中的二次再结晶退火之前连续氮化的装置，包括：氮化氮化带， 用于冷却带材的冷却区域; 以及可选的加热区，设置在氮化区的上游，用于加热带，其中，氮化区设置有辉光放电电极，并且通过辉光放电等离子体氮化该带，其中辉光放电电极用作正电极，并且带的功能 作为负极，抑制剂形成元件在条带的全长和全宽度上均匀分散，并且获得了具有优异的磁性能而没有变化的晶粒取向电工钢板。
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Patent Agency Ranking
6.发明申请公开(公告)号：US20150361520A1
公开(公告)日：2015-12-17
申请号：US14761719
申请日：2014-02-18
Applicant: JFE STEEL CORPORATION
Inventor： Hideyuki TAKAHASHI
IPC: C21D9/573 , C22C38/06 , C22C38/04 , C23C2/06 , C22C38/00 , C23C2/00 , C23C2/40 , C21D9/00 , C22C38/02
CPC classification number: C21D9/573 , B05C3/02 , C21D1/74 , C21D1/76 , C21D9/005 , C21D9/56 , C21D9/5735 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/003 , C23C2/02 , C23C2/06 , C23C2/40 , F27B9/145 , F27D2007/063
Abstract: A large continuous annealing device that anneals a steel strip by multiple passes in a vertical annealing furnace and is capable of quickly switching the atmosphere in the furnace is provided. A steel strip continuous annealing device 100 has a vertical annealing furnace 10 in which a heating zone 14, a soaking zone 16, and a cooling zone 18 are arranged in this order, and anneals a steel strip P passing through the zones 14, 16, and 18 in the order while being conveyed in the vertical direction in the vertical annealing furnace 10. Adjacent zones communicate through a communicating portion 30 or 32 connecting upper parts or lower parts of the zones. A gas delivery port 38 is provided in each zone, in the position opposite in the vertical direction to the position of the communicating portion with the immediately preceding zone in the steel strip P passing order.
Abstract translation: 提供了一种在垂直退火炉中通过多次退火并能够快速切换炉中的气氛的大型连续退火装置。 钢带连续退火装置100具有垂直退火炉10，其中依次布置加热区14，均热区16和冷却区18，并且使通过区域14,16的钢带P退火， 18在垂直退火炉10中沿垂直方向输送。相邻区域通过连接区域的上部或下部的连通部30或32连通。 在每个区域中，在与钢带P通过顺序中的与前一区域的连通部位的垂直方向相反的位置处，在每个区域中设置有气体输送口38。
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7.发明申请公开(公告)号：US20210310109A1
公开(公告)日：2021-10-07
申请号：US17265205
申请日：2019-07-31
Applicant: JFE STEEL CORPORATION
Inventor： Yu TERASAKI , Hideyuki TAKAHASHI , Takumi KOYAMA , Yoshihiko KAKU
Abstract: Provided is a method of producing a hot-dip metal coated steel strip with which a hot-dip metal coated steel strip of high quality can be produced by sufficiently suppressing edge overcoating. The method comprises spraying gas from a pair of gas wiping nozzles 20A and 20B onto a steel strip S while being pulled up from a molten metal bath 14, to adjust a coating weight of molten metal on both sides of the steel strip S, wherein a pair of baffle plates 40 and 42 are respectively placed outside of both transverse edges of the steel strip, and a height B of a lower end of each of the pair of baffle plates 40 and 42 with respect to a bath surface of the molten metal bath is set to +50 mm or less, where an upper side in a vertical direction is positive.
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8.发明申请公开(公告)号：US20190300997A1
公开(公告)日：2019-10-03
申请号：US16316424
申请日：2017-05-30
Applicant: JFE STEEL CORPORATION
Inventor： Yu TERASAKI , Hideyuki TAKAHASHI , Yusuke YASUFUKU , Takumi KOYAMA , Atsushi INABA
Abstract: Disclosed is a method of producing a hot-dip metal coated steel strip capable of sufficiently suppressing generation of bath wrinkles and producing high-quality hot-dip metal coated steel strip at low cost. The disclosed method of producing a hot-dip metal coated steel strip includes: blowing a gas from a pair of gas wiping nozzles 20A and 20B to a steel strip S while being pulled up from a molten metal bath 14 so as to adjust a coating weight of molten metal on both sides of the steel strip S, in which each of the gas wiping nozzles 20A and 20B includes an injection port portion that is installed downward with respect to a horizontal plane such that an angle formed by the injection port portion and the horizontal plane is 10° or more and 75° or less, and has a header pressure below 30 kPa.
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9.发明申请公开(公告)号：US20180327884A1
公开(公告)日：2018-11-15
申请号：US15779157
申请日：2016-11-08
Applicant: JFE STEEL CORPORATION
Inventor： Mai AOYAMA , Minoru TANAKA , Yoshitsugu SUZUKI , Yoshiyasu KAWASAKI , Hideyuki TAKAHASHI
IPC: C21D9/46 , C21D8/02 , C21D6/00 , C22C38/38 , C22C38/28 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/00 , C22C38/60 , C22C38/02 , C23C2/02 , C23C2/06 , C23C2/40 , B32B15/01
CPC classification number: C21D9/46 , B32B15/013 , C21D1/185 , C21D1/76 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D8/0278 , C21D8/0463 , C21D8/0473 , C21D9/48 , C21D2211/001 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/28 , C22C38/38 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/40
Abstract: A high-strength galvanized steel sheet and a method for producing the steel sheet. The steel sheet has a composition that includes C: 0.030% to 0.250%, Si: 0.01% to 3.00%, Mn: 2.00% to 10.00%, P: 0.001% to 0.100%, S: 0.0001% to 0.0200%, N: 0.0005% to 0.0100%, Ti: 0.005% to 0.200%, on a mass basis, and Fe and inevitable impurities. Additionally, the steel sheet has concentration of solute Mn at a depth of 5 μm or less from a surface of the steel sheet that is 1.50% by mass or less, and a value obtained by dividing the average mass percentage of Mn in retained austenite by the average mass percentage of Mn in ferrite is 2.0 or more.
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公开(公告)号：US20160265079A1
公开(公告)日：2016-09-15
申请号：US15034340
申请日：2014-10-30
Applicant: JFE STEEL CORPORATION
Inventor： Hideyuki TAKAHASHI , Nobuyuki SATO , Hiroyuki YOKOYAMA
CPC classification number: C21D9/561 , C21D1/26 , C21D1/74 , C21D1/76 , C21D1/767 , C21D6/005 , C21D6/008 , C21D9/56 , C21D9/562
Abstract: A continuous annealing system and a continuous annealing method with which it is possible to achieve an annealing atmosphere having a low dew point which is suitable for annealing a steel strip containing easily oxidizable metals such as Si and Mn at low cost and with stability by preventing easily oxidizable metals such as Si and Mn in steel from being concentrated in a surface portion of a steel strip and preventing the formation of oxides of easily oxidizable metals such as Si and Mn.
Abstract translation: 连续退火系统和连续退火方法，其可以实现具有低露点的退火气氛，其适合于以低成本且容易地防止易于氧化的金属如Si和Mn的钢带退火并具有稳定性 钢中的可氧化金属如Si和Mn集中在钢带的表面部分，并且防止易于氧化的氧化物如Si和Mn的氧化物。
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