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公开(公告)号：US20210148859A1
公开(公告)日：2021-05-20
申请号：US16626054
申请日：2018-05-23
发明人： Yoshimichi Hino , Hirokazu Sugihara
摘要： Provided are a method for measuring the magnetic transformation rate of a steel sheet in an annealing furnace and an apparatus for measuring the same, and a continuous annealing process and a continuous galvanizing process which utilize the method and the apparatus. One such method includes delivering an alternating-current driving signal to the surface of the steel sheet by using an air-core driving coil having a size larger than, a width of the steel sheet, measuring the driving signal reflected by the steel sheet by using air-core receiving coils having a size larger than the width of the steel sheet, and determining the magnetic transformation rate of the steel sheet by using a measurement processing unit based on a distance between the steel sheet and the driving coil which has been corrected by using the measured values of the driving signal obtained by using the receiving coils.
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公开(公告)号：US20190010564A1
公开(公告)日：2019-01-10
申请号：US16066481
申请日：2016-12-26
摘要： A rapid-cooling quenching apparatus in which a high-temperature metal sheet is dipped and cooled in a liquid and a rapid-cooling quenching method for a steel sheet are provided. The rapid-cooling quenching apparatus includes a water tank containing the liquid in which the metal sheet is dipped, a jetting device having a plurality of nozzles through which the liquid is jetted onto front and back surfaces of the metal sheet and at least some of which are placed in the liquid in the water tank, and a pair or a plurality of pairs of restraining rolls which are placed between an entrance-side end of the jetting device and an exit-side end of the jetting device and restrain the metal sheet, in which nozzles nearest to the restraining rolls are inclined toward the restraining rolls from a horizontal plane in the jetting device.
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公开(公告)号：US09758847B2
公开(公告)日：2017-09-12
申请号：US14354810
申请日：2012-11-02
IPC分类号： C22C38/18 , C22C1/10 , C23C2/02 , C23C2/28 , C22C38/00 , C22C38/06 , C21D8/02 , B32B15/01 , C22C38/02 , C22C38/04 , B21B3/02 , B21B45/08 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C21D9/46
CPC分类号： C22C38/18 , B21B3/02 , B21B45/08 , B32B15/013 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D9/46 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C23C2/02 , C23C2/28
摘要： Provided is a hot-rolled steel sheet having a composition containing 0.04 mass percent to 0.20 mass percent C, 0.7 mass percent to 2.3 mass percent Si, 0.8 mass percent to 2.8 mass percent Mn, 0.1 mass percent or less P, 0.01 mass percent or less S, 0.1 mass percent or less Al, and 0.008 mass percent or less N, the remainder being Fe and inevitable impurities. Internal oxides containing one or more selected from the group consisting of Si, Mn, and Fe are present at grain boundaries and in grains in a base metal. The internal oxides present at the grain boundaries in the base metal are located within 5 μm from the surface of the base metal. The difference between the depths at which the internal oxides are formed in the cross direction of the steel sheet is 2 μm or less.
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公开(公告)号：US11125721B2
公开(公告)日：2021-09-21
申请号：US16626054
申请日：2018-05-23
发明人： Yoshimichi Hino , Hirokazu Sugihara
摘要： Provided are a method for measuring the magnetic transformation rate of a steel sheet in an annealing furnace and an apparatus for measuring the same, and a continuous annealing process and a continuous galvanizing process which utilize the method and the apparatus. One such method includes delivering an alternating-current driving signal to the surface of the steel sheet by using an air-core driving coil having a size larger than, a width of the steel sheet, measuring the driving signal reflected by the steel sheet by using air-core receiving coils having a size larger than the width of the steel sheet, and determining the magnetic transformation rate of the steel sheet by using a measurement processing unit based on a distance between the steel sheet and the driving coil which has been corrected by using the measured values of the driving signal obtained by using the receiving coils.
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5.发明申请公开(公告)号：US20140314616A1
公开(公告)日：2014-10-23
申请号：US14354810
申请日：2012-11-02
IPC分类号： C22C38/18 , C22C38/14 , C22C38/12 , C22C38/08 , B21B45/08 , C22C38/04 , C22C38/02 , C22C38/00 , B21B3/02 , C22C38/16 , C22C38/06
CPC分类号： C22C38/18 , B21B3/02 , B21B45/08 , B32B15/013 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D9/46 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C23C2/02 , C23C2/28
摘要： Provided is a hot-rolled steel sheet having a composition containing 0.04 mass percent to 0.20 mass percent C, 0.7 mass percent to 2.3 mass percent Si, 0.8 mass percent to 2.8 mass percent Mn, 0.1 mass percent or less P, 0.01 mass percent or less S, 0.1 mass percent or less Al, and 0.008 mass percent or less N, the remainder being Fe and inevitable impurities. Internal oxides containing one or more selected from the group consisting of Si, Mn, and Fe are present at grain boundaries and in grains in a base metal. The internal oxides present at the grain boundaries in the base metal are located within 5 μm from the surface of the base metal. The difference between the depths at which the internal oxides are formed in the cross direction of the steel sheet is 2 μm or less.
摘要翻译： 本发明提供一种组合物，其含有C：0.04质量％〜0.20质量％，Si：0.7质量％〜2.3质量％，Mn：0.8质量％〜2.8质量％，0.1质量％以下，P：0.01质量％ 较少的S，0.1质量％以下的Al和0.008质量％以下的N，余量为Fe和不可避免的杂质。 含有选自Si，Mn和Fe中的一种或多种的内部氧化物存在于晶界和贱金属的晶粒中。 存在于母材的晶界的内部氧化物位于距母材表面5μm以内。 在钢板的横向上形成内部氧化物的深度之差为2μm以下。
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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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