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公开(公告)号：US11634819B2
公开(公告)日：2023-04-25
申请号：US17731862
申请日：2022-04-28
发明人： Soo-Hyoun Cho , Dae-Chul Bae , Dong-Yun Kim , Chang-Hyun Park
IPC分类号： C23C22/42 , C23C2/06 , C23C2/26 , C23C2/40 , C23C22/44 , C09D5/08 , C23C22/40 , C09D5/10 , C22C18/04 , C22C18/00 , C23C22/07 , G06N20/20 , G06N3/04 , G06N3/08 , G06T11/00
摘要： Provided is a solution composition for steel sheet surface treatment, comprising 30 wt % to 60 wt % of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B); 0.2 wt % to 0.4 wt % of a rust-inhibiting and corrosion-resisting agent; 0.1 wt % to 0.3 wt % of a molybdenum-based compound; 5 wt % to 10 wt % of a water-soluble cationic urethane resin; 0.5 wt % to 2.0 wt % of a silane coupling agent; and 27.3 wt % to 64.2 wt % of water, a zinc-based plated steel sheet surface-treated with the same, and a manufacturing method therefor, the zinc-based plated steel sheet surface-treated with the solution composition for steel sheet surface treatment containing trivalent chromium may have an excellent effect on corrosion resistance, blackening resistance, fingerprint resistance, oil resistance, and alkali resistance.
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公开(公告)号：US11597986B2
公开(公告)日：2023-03-07
申请号：US17251302
申请日：2019-06-12
发明人： Manuela Irnich , Rainer Fechte-Heinen , Miriam Lange , Bernd Linke , Jan-Hendrik Rudolph , Richard G. Thiessen
IPC分类号： C22C38/04 , C22C38/02 , C22C38/00 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/40 , C21D8/04 , C23G1/00 , C22C38/06 , C23C2/06
摘要： The present invention relates to a flat steel product which has good deep-drawing ability, low edge-crack sensitivity and good bending behaviour. To this end, the flat steel product contains a steel which consists of (in wt %) 0.1-0.5% C, 1.0-3.0% Mn, 0.9-1.5% Si, up to 1.5% Al, up to 0.008% N, up to 0.020% P, up to 0.005% S, 0.01-1% Cr and optionally one or more of the following elements: up to 0.2% Mo, up to 0.01% B, up to 0.5% Cu, up to 0.5% Ni and optionally a total of 0.005-0.2% microalloying elements, the remainder being iron and unavoidable impurities, wherein 75
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公开(公告)号：US11591685B2
公开(公告)日：2023-02-28
申请号：US16759275
申请日：2018-11-13
IPC分类号： C23C2/28 , C21D9/46 , C21D8/02 , C21D6/00 , C23C2/02 , C23C2/06 , C23C2/40 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/06 , C22C38/14 , C22C38/12 , C22C38/16 , B32B15/01 , C22C18/04 , C22C38/08
摘要： [Object] What is provided is a manufacturing method of a galvannealed steel sheet capable of further promoting alloying of zinc plating with the steel sheet.
[Resolution Means] A manufacturing method of a galvannealed steel sheet, including: forming on a surface of a steel sheet after hot rolling and pickling which contains, by mass %, C: 0.001% to 0.350%, Si: 0.001% to 2.500% or P: 0.001% to 0.100%, or combination thereof, Mn: 0.10% to 3.00%, S: 0.001% to 0.010%, N: 0.0010% to 0.0065%, and sol. Al: 0.001% to 0.800% with a remainder being Fe and impurities, grooves having an opening surface width of 10 μm to 25 μm and a depth of 10 μm to 30 μm at intervals of 20 μm to 500 μm; cold rolling the steel sheet at a rolling reduction of 30% or more; reduction annealing the steel sheet after the cold rolling; immersing the steel sheet in a hot-dip galvanizing bath containing 0.10 mass % to 0.20 mass % of Al with a remainder consisting of Zn and optional components, and adhering a hot-dip galvanized layer to the surface of the steel sheet; and heating the steel sheet to which the hot-dip galvanized layer is adhered, and alloying the steel sheet with the hot-dip galvanized layer.-
4.发明授权公开(公告)号：US11591665B2
公开(公告)日：2023-02-28
申请号：US16956390
申请日：2018-12-18
申请人： ArcelorMittal
发明人： Coralie Jung , Astrid Perlade , Kangying Zhu , Frédéric Kegel
IPC分类号： C01D9/00 , C21D8/00 , C22C38/00 , C23C2/12 , C21D9/46 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/32 , C23C2/06
摘要： A cold-rolled and heat treated steel sheet, has a composition comprising 0.1%≤C≤0.4%, 3.5%≤Mn≤8.0%, 0.1%≤Si≤1.5%, Al≤3%, Mo≤0.5%, Cr≤1%, Nb≤0.1%, Ti≤0.1%, V≤0.2%, B≤0.004%, 0.002%≤N≤0.013%, S≤0.003%, P≤0.015%. The structure consists of, in surface fraction: between 8 and 50% of retained austenite, at most 80% of intercritical ferrite, the ferrite grains, if any, having an average size of at most 1.5 μm, and at most 1% of cementite, the cementite particles having an average size lower than 50 nm, martensite and/or bainite.
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公开(公告)号：US11578378B2
公开(公告)日：2023-02-14
申请号：US16754589
申请日：2018-10-19
申请人： ArcelorMittal
IPC分类号： C21D9/46 , B23K11/11 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/32 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/02 , B23K103/20 , B23K103/04
摘要： Method for the manufacture of a galvannealed steel sheet includes the following steps: A) the provision of a pre-coated steel sheet coated with a first coating comprising iron and nickel, such steel sheet having the following chemical composition in weight percent 0.10
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公开(公告)号：US20230021399A1
公开(公告)日：2023-01-26
申请号：US17787019
申请日：2020-12-02
申请人： POSCO
发明人： Heung-Yun Kim , Sung-Joo Kim , Yong-Joo Kim , Dae-Young Kang
摘要： An exemplary embodiment in the present disclosure provides a hot-dip Zn—Al—Mg-based alloy-plated steel material having excellent corrosion resistance in a processed portion, and a method for manufacturing the same. The steel material includes: an iron substrate; and a hot-dip alloy-plated layer formed on the iron substrate, wherein the hot-dip alloy-plated layer contains, by wt %, more than 8% to 25% of Al, more than 4% to 12% of Mg, and a balance of Zn and inevitable impurities, a fraction of a MgZn2 phase in the hot-dip alloy-plated layer is 10 to 45 area %, cracks are formed inside the MgZn2 phase, and the number of cracks present per 100 μm in a direction perpendicular to a thickness direction of a steel sheet in a field of view in which the cracks are observed based on a cross section in the thickness direction of the steel sheet is 3 to 80.
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公开(公告)号：US20230019786A1
公开(公告)日：2023-01-19
申请号：US17782401
申请日：2020-12-01
申请人： POSCO
发明人： Sung-Joo Kim , Heung-Yun Kim , Myung-Soo Kim , Dae-Young Kang , Yong-Joo Kim
摘要： A hot-dipped galvanized steel sheet having excellent bending workability and corrosion resistance and a manufacturing method therefor are provided. A hot-dipped galvanized steel sheet of the present invention comprises: a base steel sheet; a Zn—Mg—Al based plating layer provided on at least one surface of the base steel sheet and including, in wt %, with respect to components other than iron (Fe) diffused from the base steel sheet, 5.1 to 25% of Al and 4.0-10% of Mg, and the remainder of Zn and other inevitable impurities; and an interfacial alloy layer having a Fe—Al—Zn composition formed between the base steel sheet and the plating layer, wherein the interfacial alloy layer has a thickness of 0.5-2 μm and has a dendritic form, the Zn—Mg—Al based plating layer has a Zn—Al—MgZn2 ternary eutectic structure, a Zn—MgZn2 binary eutectic structure, and a structure including one or more of an Al single-phase structure having solid-solubilized Zn and a Zn single-phase structure, and agglomerated Al is included in a MgZn2 structure.
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公开(公告)号：US11512380B2
公开(公告)日：2022-11-29
申请号：US16478851
申请日：2018-01-17
发明人： Masaki Yamamoto , Tadashi Nakano , Ichiro Takahashi , Hiroyuki Nakamizo , Toshiaki Sato , Yoshinobu Kurisu , Yuuki Sakuraba , Yoshitaka Yukura , Tsutomu Ohta , Shinichi Kajimoto , Noboru Suzuki , Masahiko Tsuchiyama , Yuusuke Murai
摘要： The present invention provides a method for manufacturing more beautiful black coated steel sheets by uniformly blackening the coating layer. Specifically, the present invention provides a method for manufacturing black coated steel sheets, which brings Zn—Al—Mg alloy coated steel sheets (1) into contact with steam in a closed container (10), wherein said closed container (10) can maintain a predefined internal pressure through variable control of the amount of steam flowing into said closed container (10) and/or the amount of steam flowing out of said closed container (10), and in said closed container (10) that can maintain said predefined pressure, said Zn—Al—Mg alloy coated steel sheets (1) have contact with the steam introduced into said closed container (10).
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公开(公告)号：US11512362B2
公开(公告)日：2022-11-29
申请号：US17087019
申请日：2020-11-02
申请人： ArcelorMittal
发明人： Olga A. Girina , Damon Panahi
IPC分类号： C21D9/46 , C21D1/22 , C21D6/00 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/06 , C23C2/28 , C23C2/40 , C22C38/00 , C23C2/02 , B32B15/04 , C22C38/44 , C23C2/26 , C23C30/00 , C22C38/18 , B32B15/01 , C22C38/12 , C23C2/34 , B32B15/18 , C22C38/22 , C22C38/34 , C22C38/38
摘要： A method for producing a coated steel sheet having a tensile strength TS of at least 1450 MPa and a total elongation TE of at least 17% includes the successive steps of providing a cold rolled steel sheet made of a steel having a chemical composition comprising, in weight %: 0.34%≤C≤0.45%, 1.50%≤Mn≤2.30%, 1.50≤Si≤2.40%, 0%
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公开(公告)号：US20220371302A1
公开(公告)日：2022-11-24
申请号：US17771012
申请日：2020-10-16
发明人： Mamoru SAITO , Yasuto GOTO , Kiyokazu ISHIZUKA
摘要： A coated steel material including: a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, wherein the coating layer has a predetermined chemical composition, and, in a backscattered electron image of the Zn—Al—Mg alloy layer that is obtained at a time of observing the surface of the Zn—Al—Mg alloy layer after polishing to ½ of the layer thickness, under a scanning electron microscope at a magnification of 100×, Al crystals are present, and the average value of the cumulative circumferential length of the Al crystals is 88 to 195 mm/mm2.
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