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公开(公告)号：US20240360528A1
公开(公告)日：2024-10-31
申请号：US18683982
申请日：2022-07-29
摘要： A metal-sheet quenching apparatus cools a metal sheet while conveying the metal sheet and includes a cooling tank in which a cooling fluid is to be stored and the metal sheet is immersed in the cooling fluid to be cooled; restraining rolls that are installed inside the cooling tank and convey the metal sheet that has been cooled in the cooling tank while restraining the metal sheet in the thickness direction; a water-level adjustor that adjusts the height of a fluid surface of the cooling fluid inside the cooling tank; and a position control device that adjusts the height of the fluid surface of the cooling fluid inside the cooling tank by controlling the operation of the water-level adjustor.
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公开(公告)号：US12091726B2
公开(公告)日：2024-09-17
申请号：US17378898
申请日：2021-07-19
发明人： Eiichi Ota , Yasuhiro Yogo , Tomoaki Ihara , Shinobu Okuma
IPC分类号： C21D9/48 , B21D22/02 , B21D22/20 , C21D1/22 , C21D1/673 , C21D7/13 , C21D8/00 , C22C38/04 , C22C38/18 , C22C38/38 , C21D9/00 , C21D9/46
CPC分类号： C21D9/48 , B21D22/022 , B21D22/208 , C21D1/22 , C21D1/673 , C21D7/13 , C21D8/00 , C21D8/005 , C22C38/04 , C22C38/18 , C22C38/38 , C21D9/00 , C21D9/46 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009
摘要： A hot-press molding method of the present disclosure includes a first heating process in which a steel plate is heated and the entire steel plate becomes austenite, a first cooling process in which a cooling rate of the steel plate after the first heating process is partially changed, a first region which is a part of the steel plate is transformed into martensite, and a second region other than the first region remains as austenite, a second heating process in which the entire steel plate is reheated and the first region becomes tempered martensite, and a second cooling process in which the entire steel plate after the second heating process is cooled. At least one of the first cooling process and the second cooling process is performed during a molding process in which the steel plate is press-molded on a molding die.
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公开(公告)号：US12043876B2
公开(公告)日：2024-07-23
申请号：US17285375
申请日：2019-10-16
IPC分类号： C21D1/22 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58
CPC分类号： C21D9/46 , C21D1/22 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure comprising ferrite: 5% or less, and at least one of upper bainite, fresh martensite, tempered martensite, lower bainite, and retained γ: 95% to 100%, and retained γ: 5% to 20%. Retained γUB has a specified area percentage SγUB, retained γLB has a specified distribution number NγLB, and at least one of (i) fresh martensite has a specified equivalent circular grain diameter and aspect ratio and (ii) retained γ grains has a specified equivalent circular grain diameter and aspect ratio.
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4.发明授权公开(公告)号：US11655516B2
公开(公告)日：2023-05-23
申请号：US16467643
申请日：2017-12-15
申请人： ArcelorMittal
IPC分类号： C21D9/46 , C21D1/20 , C21D1/22 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/06 , C23C2/40 , B32B15/01
CPC分类号： C21D9/46 , B32B15/012 , C21D1/20 , C21D1/22 , C21D8/0263 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/06 , C23C2/40 , B32B2605/08 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C2204/00
摘要： A tempered and coated steel sheet having a composition containing the following elements, expressed in percentage by weight:
0.17%≤carbon≤0.25%,
1.8%≤manganese≤2.3%,
0.5%≤silicon≤2.0%,
0.03%≤aluminum≤1.2%,
sulphur≤0.03%,
phosphorus≤0.03%,
the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet containing in area fraction, 4 to 20% residual austenite, 0 to 15% of ferrite, 40 to 85% tempered bainite and a minimum of 5% of tempered martensite, wherein the cumulated amounts of tempered martensite and residual austenite is between 10 and 30%. The composition may also contain one or more of the following elements: chromium≤0.4%, molybdenum≤0.3%, niobium≤0.04%, titanium≤0.1%. Manufacturing methods and use of tempered and coated steel sheet for making vehicle parts are also described.-
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：US11230743B2
公开(公告)日：2022-01-25
申请号：US16793214
申请日：2020-02-18
发明人： Michael Kaufmann , Marco Walterfang , Ralf Köster
摘要： The present invention relates to a method for manufacturing a tubular product, characterized in that the tubular product is manufactured from steel comprising chromium in the range of 2.5 to 9.5 wt. % and silicon in an amount of more than 1.0 wt. %, and the method comprises the steps of austenitizing, quenching and tempering at a tempering temperature in the range of 300° C. to 550° C. Furthermore, the invention concerns a tubular product produced by this method.
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公开(公告)号：US20220010397A1
公开(公告)日：2022-01-13
申请号：US17285375
申请日：2019-10-16
IPC分类号： C21D9/46 , C21D8/02 , C21D1/22 , C21D6/00 , C22C38/58 , C22C38/54 , C22C38/50 , C22C38/42 , C22C38/44 , C22C38/14 , C22C38/12 , C22C38/04 , C22C38/02 , C22C38/06 , C22C38/00
摘要： A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure comprising ferrite: 5% or less, and at least one of upper bainite, fresh martensite, tempered martensite, lower bainite, and retained γ: 95% to 100%, and retained γ: 5% to 20%. Retained γUB has a specified area percentage SγUB, retained γLB has a specified distribution number NγLB, and at least one of (i) fresh martensite has a specified equivalent circular grain diameter and aspect ratio and (ii) retained γ grains has a specified equivalent circular grain diameter and aspect ratio.
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公开(公告)号：US10961611B2
公开(公告)日：2021-03-30
申请号：US15536200
申请日：2015-12-08
发明人： Gang Liu , Ana Yang , Zigang Li , Fengming Song
IPC分类号： C22C38/54 , C22C38/48 , C22C38/46 , C22C38/04 , C22C38/06 , C21D8/02 , C22C38/02 , C22C38/00 , C22C38/50 , C22C38/44 , C22C38/58 , C21D1/22 , C21D6/00 , C22C38/32 , C21D1/02 , C21D1/18 , C21D7/13 , C22C38/40 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/24 , C21D9/46
摘要： A high-strength steel having a yield strength at a level of 800 MPa and a method of manufacturing the same, with the components and amounts thereof by weight percentage being: C: 0.06-0.14%, Si: 0.1-0.30%, Mn: 0.8-1.60%, Cr: 0.2-0.70%, Mo: 0.1-0.40%, Ni: 0-0.30%, Nb: 0.01-0.030%, Ti: 0.01-0.030%, V: 0.01-0.05%, B: 0.0005-0.0030%, Al: 0.02-0.06%, Ca: 0.001-0.004%, N: 0.002-0.005%, P≤0.02%, S≤0.01%, O≤0.008%, the balance of Fe and unavoidable impurities; wherein the above elements meet the following relationships: 0.40%
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公开(公告)号：US20210047707A1
公开(公告)日：2021-02-18
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 , C21D8/02 , C23C2/06 , C23C2/28 , C23C2/40 , C21D1/22 , C22C38/00 , C23C2/02 , B32B15/04 , C22C38/44 , C23C2/26 , C22C38/04 , C23C30/00 , C22C38/02 , C22C38/18 , B32B15/01 , C22C38/12 , C23C2/34 , B32B15/18 , C21D6/00 , C22C38/06 , 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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10.发明申请公开(公告)号：US20200263272A1
公开(公告)日：2020-08-20
申请号：US16857115
申请日：2020-04-23
申请人： ArcelorMittal
发明人： Michel SANADRES , Christine DESSAIN
IPC分类号： C21D9/50 , C23F17/00 , C22C38/32 , C22C38/28 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/02 , C21D6/00 , C21D1/22 , C09D167/02 , C09D163/00 , C09D133/02 , C09D123/12 , C09D123/06 , C08K3/04 , B21D35/00 , B21D22/02 , C21D1/673 , C23C2/40 , C23C2/28 , C23C2/26 , C23C2/12 , C09D5/32 , C09D5/00
摘要： A fabrication method for a press hardened part is provided. A sheet or a steel substrate blank for heat treatment is provided. A pre-coating is applied. The pre-coating has at least one layer of aluminum or aluminum alloy in contact with the steel substrate on at least one of the principal faces of the sheet or blank. Then a polymerized layer is deposited on the pre-coating. The polymerized layer has a thickness between 2 and 30 μm. The polymerized layer does not contain silicon, has a nitrogen content of less than 1% by weight and carbon pigments in a quantity between 3 and 30% by weight. The blank or the sheet is heated to obtain an interdiffusion between the steel substrate and the pre-coating and to give the steel a partly or totally austenitic structure. Then the blank or the sheet is hot stamped to obtain a part. The part is cooled by holding the part in a stamping tool so that the microstructure of the steel substrate includes, at least in a portion of the part, martensite or bainite.
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