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公开(公告)号：US12043902B2
公开(公告)日：2024-07-23
申请号：US17791738
申请日：2021-01-15
IPC分类号： C23C30/00 , B32B15/01 , B32B15/04 , B32B15/18 , C21D8/02 , C21D9/46 , C22C22/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/28 , C23C2/04 , C23C4/02 , C23C4/06 , C23C4/08 , C23C4/18 , C23C10/02 , C23C10/18 , C23C10/20 , C23C10/60 , C23C14/16 , C23C24/08 , C23C28/00 , C23C28/02
CPC分类号： C23C30/005 , B32B15/01 , B32B15/011 , B32B15/04 , B32B15/043 , B32B15/18 , C21D8/0205 , C21D9/46 , C22C22/00 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/28 , C23C2/04 , C23C4/02 , C23C4/06 , C23C4/08 , C23C4/18 , C23C10/02 , C23C10/18 , C23C10/20 , C23C10/60 , C23C14/16 , C23C24/08 , C23C28/021 , C23C28/023 , C23C28/32 , C23C28/321 , C23C28/322 , C23C30/00 , C21D2211/008 , Y10T428/12729 , Y10T428/12771 , Y10T428/12806 , Y10T428/12861 , Y10T428/12951 , Y10T428/12958 , Y10T428/12972 , Y10T428/26
摘要： The invention relates to a steel component comprising a steel substrate having an anticorrosion coating present at least on one side of the steel substrate. This anticorrosion coating comprises a manganese-containing alloy layer. The manganese-containing alloy layer here forms the closest alloy layer of the anticorrosion coating to the surface. Moreover the manganese-containing alloy layer comprises iron and a further metal.
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公开(公告)号：US12043885B2
公开(公告)日：2024-07-23
申请号：US17253222
申请日：2019-07-09
发明人： Daisuke Matsuo , Yusaku Tomio
IPC分类号： C22C38/50 , C21D8/00 , C21D8/06 , C21D9/08 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C22C38/50 , C21D8/005 , C21D8/065 , C21D9/085 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48 , C21D2211/001 , C21D2211/005 , C21D2211/008
摘要： The chemical composition of the seamless steel pipe contains Cr: 15.00 to 18.00% in mass % and satisfies Formulae (1) and (2). Furthermore, in the microstructure, (I) a total volume ratio of ferrite and martensite is 80% or more, with the balance being retained austenite of a volume ratio of 20% or less, (II) the number of intersections NTL in the L-direction observation field of view is 38 or more and NTL/NL is 1.80 or more, and further (III) the number of intersections NTC in the C-direction observation field of view is 30 or more and NTC/NC is 1.70 or more.
156Al+18Ti+12Nb+11Mn+5V+328.125N+243.75C+12.5S≤12.5 (1)
Ca/S≥4.0 (2)-
公开(公告)号：US12043877B2
公开(公告)日：2024-07-23
申请号：US18012882
申请日：2021-08-06
IPC分类号： C22C38/00 , C21D3/04 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/60
CPC分类号： C21D9/46 , C21D3/04 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0257 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/60
摘要： A steel sheet includes a sheet thickness center part and a first surface layer softened part and a second surface layer softened part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer softened part and second surface layer softened part have 10 μm or more average thicknesses and have average Vickers hardnesses of 0.90 times or less of the average Vickers hardness of a sheet thickness ½ position, and the first surface layer softened part has an average Vickers hardness of 1.05 times or more the average Vickers hardness of the second surface layer softened part.
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公开(公告)号：US20240240299A1
公开(公告)日：2024-07-18
申请号：US18622583
申请日：2024-03-29
申请人： POSCO CO., LTD
发明人： Ki-Cheol KANG , Sang-Ho UHM , Chang-Woon JEE , Yeon-Chae JEONG , Kwang-Tai MIN
IPC分类号： C23C2/06 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/32 , C22C38/38 , C23C2/02 , C23C2/28 , C23C2/40
CPC分类号： C23C2/06 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/32 , C22C38/38 , C23C2/02 , C23C2/0222 , C23C2/0224 , C23C2/024 , C23C2/28 , C23C2/40
摘要： A welded member includes: a first steel sheet including a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet; and a second steel sheet spot-welded on the first steel sheet and facing the zinc-based plating layer of the first steel sheet, a spot-welded zone being formed between the first steel sheet and the second steel sheet. A surface layer of the base steel sheet has a decarburization ratio of 30% or more. The decarburization ratio is represented by equation: Decarburization ratio (%) of surface layer=(1−average carbon concentration in surface layer/bulk carbon concentration)*100 where the surface layer refers to a region of the base steel sheet from the surface thereof to a depth of 35 μm. A shoulder portion of the spot-welded zone includes a B-type crack having a length of 100 μm or less, and no C-type crack.
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公开(公告)号：US12037654B2
公开(公告)日：2024-07-16
申请号：US17279194
申请日：2019-09-26
IPC分类号： C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C21D8/1222 , C21D8/1205 , C21D8/1233 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48 , C21D2201/05
摘要： In a method of producing a grain-oriented electrical steel sheet comprising subjecting a steel slab containing no inhibitor-forming components to hot rolling, cold rolling, primary recrystallization annealing working also as decarburization and to final annealing causing secondary recrystallization after applying an annealing separator on the surface, the final cold rolling for cold rolling the steel sheet to the final thickness uses a warm rolling with a tandem rolling mill at a total rolling reduction of not less than 80% at 150 to 280° C. and is performed by extending a pass line length of the steel sheet between the stands so that T satisfies T≥1.3×L/V, where an distance between the stands is defined as L(m), a speed of the steel sheet passing between the stands is defined as V (mpm), and a pass time during which the steel sheet passes between the stands is defined as T(min).
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公开(公告)号：US20240229212A1
公开(公告)日：2024-07-11
申请号：US18562665
申请日：2022-04-21
IPC分类号： C23C2/06 , C21D1/74 , C21D6/00 , C21D8/02 , C21D9/46 , C22C18/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/56 , C22C38/60 , C23C2/28 , C23C2/40
CPC分类号： C23C2/06 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D9/46 , C22C18/00 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/56 , C22C38/60 , C23C2/285 , C23C2/40 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： The hot dip galvannealed steel sheet of the present disclosure has a base steel sheet and a plating layer. The base steel sheet has a predetermined chemical composition by mass %. An existence ratio ER of internal oxides identified under predetermined conditions by observation of the cross-section of the base steel sheet is 40% or less and an interval I of internal oxides is 300 μm or more. The hot dip galvannealed steel sheet of the present disclosure is excellent in appearance etc.
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57.发明公开公开(公告)号：US20240229199A9
公开(公告)日：2024-07-11
申请号：US18547692
申请日：2022-03-02
发明人： Shigehiro TAKAJO , Hiroi YAMAGUCHI
CPC分类号： C22C38/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/60
摘要： The method includes slab-heating a steel slab to a temperature of higher than a γ-phase precipitation temperature and 1380° C. or lower, subjecting the steel slab to rough rolling including at least two passes of rolling at a predetermined temperature with an introduced sheet thickness true strain εt of 0.50 or more and to finish rolling with a rolling finish temperature of 900° C. or higher to obtain a hot-rolled sheet, cooling the sheet for 1 second or longer at a cooling rate of 70° C./s or higher within 2 seconds after finish rolling, coiling the sheet at a coiling temperature of 600° C. or lower, performing hot-rolled sheet annealing for soaking at a predetermined soaking temperature, and then performing cold rolling, primary recrystallization annealing, and secondary recrystallization annealing.
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公开(公告)号：US20240229180A9
公开(公告)日：2024-07-11
申请号：US18277874
申请日：2022-01-28
发明人： Katsuya Hata , Shimpei Yoshioka , Shinjiro Kaneko
IPC分类号： C21D9/46 , C21D1/18 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/34 , C22C38/38 , C22C38/60
CPC分类号： C21D9/46 , C21D1/18 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/34 , C22C38/38 , C22C38/60 , C21D2211/001 , C21D2211/002 , C21D2211/008
摘要： A steel sheet has a chemical composition containing, by mass %, C: 0.20% or more and 0.40% or less, Si: more than 1.0% and 3.0% or less, Mn: 1.5% or more and 3.5% or less, P: 0.002% or more and 0.010% or less, S: 0.0002% or more and 0.0020% or less, sol. Al: 0.40% or less (not including 0%), and N: 0.0100% or less, with the balance being Fe and incidental impurities; and a steel microstructure containing, in area fraction, tempered martensite: 45% or more and 83% or less, bainite: 15% or more and 53% or less, and retained austenite: 2% or more. Carbides in the tempered martensite have an average particle size of 0.40 μm or less, an average amount of C in the retained austenite is 0.5% by mass or more, and a tensile strength is 1,470 MPa or more.
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59.发明授权公开(公告)号：US12031225B2
公开(公告)日：2024-07-09
申请号：US17046674
申请日：2019-04-12
IPC分类号： C25D5/50 , B32B15/01 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C25D3/12 , C25D7/06 , H01M50/10 , H01M50/119 , H01M50/124 , H01M50/145
CPC分类号： C25D5/50 , B32B15/015 , C21D9/46 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C25D3/12 , C25D7/0614 , H01M50/10 , H01M50/119 , H01M50/124 , H01M50/1245 , H01M50/145
摘要： A Ni diffusion-plated steel sheet of the present invention includes a base steel sheet and a Fe—Ni diffusion alloy-plating layer positioned on at least one surface of the base steel sheet, an Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 20 g/m2, a Fe concentration Cs of an outermost layer of the Fe—Ni diffusion alloy-plating layer is 10 to 55 mass %, the base steel sheet has a predetermined chemical composition, and a ferrite grain size number specified by JIS G 0551 (2013) of the base steel sheet is 11.0 or more.
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60.发明公开公开(公告)号：US20240218476A1
公开(公告)日：2024-07-04
申请号：US18557348
申请日：2022-04-29
申请人： ArcelorMittal
IPC分类号： C21D8/00 , B32B15/01 , C21D1/18 , C21D6/00 , C21D9/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54
CPC分类号： C21D8/005 , B32B15/01 , C21D1/18 , C21D6/004 , C21D6/005 , C21D6/008 , C21D9/0068 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C21D2211/008
摘要： A steel sheet made of a steel having a composition including, C: 0.3-0.4%, Mn: 0.5-1.0%, Si: 0.4-0.8%, Cr: 0.1-1.0%, Mo: 0.1-0.5%, Nb: 0.01-0.1%, Al: 0.01-0.1%, Ti: 0.008-0.03%, B: 0.0005-0.003%, P≤0.020%, Ca≤0.001%, S≤0.004%, N≤0.005% and including optionally Ni
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