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公开(公告)号：US12123069B2
公开(公告)日：2024-10-22
申请号：US17286148
申请日：2019-10-16
IPC分类号： C21D9/46 , C21D1/20 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , C22C38/60
CPC分类号： C21D9/46 , C21D1/20 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , C22C38/60 , 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% by area percentage, and retained γ: 4% to 15% by volume percentage. 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：US12123064B2
公开(公告)日：2024-10-22
申请号：US17422406
申请日：2020-01-30
发明人： Hiroshi Shuto , Koutarou Hayashi , Hiroshi Kaido , Akifumi Sakakibara , Jun Ando , Tetsu Asato
IPC分类号： C21D9/46 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C21D1/02
CPC分类号： C21D8/0226 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C21D1/02 , C21D2211/001
摘要： This hot-rolled steel sheet has a predetermined chemical composition, in which a metal microstructure contains, by area %, 3.0% or more of residual austenite, has a ratio L52/L7 of a length L52 of a grain boundary having a crystal orientation difference of 52° to a length L7 of a grain boundary having a crystal orientation difference of 7° about a direction of 0.10 or more and 0.18 or less, has a standard deviation of a Mn concentration of 0.60 mass % or less, and has a tensile strength of 980 MPa or more.
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公开(公告)号：US20240301539A1
公开(公告)日：2024-09-12
申请号：US17758881
申请日：2022-03-21
申请人： SHANDONG INDUSTRIAL RESEARCH INSTITUTE OF ADVANCED MATERIALS CO., LTD. , STATE POWER INVESTMENT CORPORATION HYDROGEN ENERGY CO., LTD.
发明人： Huaxing LU , Yeting XI , Yunmin YANG , Jian WEI
IPC分类号： C22C38/44 , C22C38/02 , C22C38/42 , C22C38/48 , C22C38/50 , C25D11/34 , C25D21/12 , H01M8/021
CPC分类号： C22C38/44 , C22C38/02 , C22C38/42 , C22C38/48 , C22C38/50 , C25D11/34 , C25D21/12 , H01M8/021
摘要： Provided are a ferritic stainless steel used for bipolar plates of fuel cells, a controlling method of surface roughness, a method of forming passivation films, and use. The ferritic stainless steel comprises C of less than or equal to 0.03 wt. %, N of less than or equal to 0.02 wt. %, Si of less than or equal to 0.4 wt. %, Mn of less than or equal to 0.5 wt. %, Cr of 16-23 wt. %, Cu of 0-2.0 wt. %, Mo of 1.8-2.5 wt. %, Ni of 0.2-2.0 wt. %, Ti of 0.1-0.5 wt. %, Nb of 0.005-0.5 wt. %, P of less than or equal to 0.02 wt. %, S of less than or equal to 0.02 wt. %, and a remainder composed of Fe and other unavoidable accompanying elements, and the ferritic stainless steel has a grain size number of 4-9. The ferritic stainless steel has excellent corrosion resistance and electrical conductivity, and good elongation and deformation as well, exhibiting both economy and cost advantages.
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公开(公告)号：US20240301538A1
公开(公告)日：2024-09-12
申请号：US18599542
申请日：2024-03-08
申请人： ResOps, LLC
发明人： Joe L. Scott , Hai Nguyen
IPC分类号： C22C38/42 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/44 , C22C38/54 , C23C4/06
CPC分类号： C22C38/42 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/44 , C22C38/54 , C23C4/06
摘要： A thermal spray alloy system that is more resistant to corrosion and erosion and hard-wear abrasion than conventional alloy compositions, and may be applied to a substrate by conventional welding techniques or thermal spray. The alloy may comprise carbon, nitrogen, and boron, in addition to chromium and other elements. The object to be coated may be any downhole component used in the oil and gas industry, or may be applied to any object or tool that needs an increased wear and/or corrosive protection layer including in diverse fields such as marine, chemical processing, and refining. A thermal spray coating with the alloy composition provides increased strength and resistance to spalling, breaking, cracking, deforming, and crack formation.
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公开(公告)号：US12084752B2
公开(公告)日：2024-09-10
申请号：US17977622
申请日：2022-10-31
发明人： Abhinav Saboo , Ricardo Komai , Dana Frankel , Marie Thomas , Greg Olson
IPC分类号： C22C38/50 , B33Y70/00 , C22C38/00 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , B33Y10/00
CPC分类号： C22C38/50 , B33Y70/00 , C22C38/001 , C22C38/002 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , B22F2201/11 , B22F2301/35 , B33Y10/00
摘要： Exemplary alloys may comprise, by weight percentage, 13.25% to 14.75% chromium; 4.5% to 5.5% nickel; 0.11% to 0.17% carbon; 0.01% to 0.31% titanium; and the balance of weight percent comprising iron and incidental elements and impurities. Exemplary methods may include conducting additive manufacturing with an atomized alloy powder to generate a manufactured article, where the atomized alloy powder may comprise, by weight percentage, 13.25% to 14.75% chromium; 4.5% to 5.5% nickel; 0.11% to 0.17% carbon; 0.01% to 0.31% titanium; and the balance of weight percent comprising iron and incidental elements and impurities.
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公开(公告)号：US12074348B2
公开(公告)日：2024-08-27
申请号：US17423897
申请日：2020-01-07
发明人： Takayoshi Yano , Shin Ishikawa
IPC分类号： H01M8/021 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/58 , C23F1/28
CPC分类号： H01M8/021 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/58 , C23F1/28
摘要： An austenitic stainless steel sheet for fuel cell separators comprises a textured structure at a surface of the stainless steel sheet, the textured structure having recessed parts and projected parts, an average height of the projected parts being 30 nm or more and 300 nm or less, and an average interval between the projected parts being 20 nm or more and 350 nm or less, wherein a ratio [Cr]/[Fe] of an atomic concentration of Cr existing in chemical form other than metal to an atomic concentration of Fe existing in chemical form other than metal at the surface of the stainless steel sheet is 1.0 or more.
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公开(公告)号：US12060631B2
公开(公告)日：2024-08-13
申请号：US17293010
申请日：2019-11-20
发明人： Genki Abukawa , Shohei Yabu
IPC分类号： C22C38/58 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/52 , C22C38/54
CPC分类号： C22C38/58 , C21D8/0205 , C21D8/0226 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/52 , C22C38/54
摘要： A hot-rolled steel sheet includes, as chemical composition, C, Si, Mn, and sol.Al. In the hot-rolled steel sheet, a sum of an average of pole densities in a crystal orientation group consisting of {211} to {111} and a pole density in a crystal orientation of {110} is 0.5 to 6.0 in the surface region, and the tensile strength is 780 to 1370 MPa.
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公开(公告)号：US20240262787A1
公开(公告)日：2024-08-08
申请号：US18621755
申请日：2024-03-29
申请人： STAMICARBON B.V.
IPC分类号： C07C273/04 , B01D1/06 , B01D3/34 , B01J19/00 , B01J19/02 , B22F7/06 , C07C273/16 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/26 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C07C273/04 , B01D1/065 , B01D3/346 , B01J19/0013 , B01J19/02 , C07C273/16 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/26 , C22C38/42 , C22C38/44 , C22C38/48 , B01J2219/00081 , B01J2219/0286 , B22F7/064 , B22F2301/35 , C21D2211/005
摘要： The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.
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9.发明公开公开(公告)号：US20240261119A1
公开(公告)日：2024-08-08
申请号：US18638543
申请日：2024-04-17
发明人： Deyuan Zhang , Xianmiao Chen , Xiangdong Liu
IPC分类号： A61F2/82 , A61L27/04 , A61L31/02 , B21C1/00 , B21C1/24 , C21D8/10 , C21D9/08 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/14 , C22C38/42 , C22C38/44 , C23C8/02 , C23C8/26
CPC分类号： A61F2/82 , A61L27/04 , A61L31/02 , A61L31/022 , C21D8/105 , C21D9/08 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/14 , C22C38/42 , C22C38/44 , C23C8/02 , C23C8/26 , A61F2240/001 , B21C1/00 , B21C1/003 , B21C1/24
摘要： A lumen stent preform is provided using a plasma nitriding technology, a preparation method thereof, a method for preparing a lumen stent by using the preform, and a lumen stent obtained according to the method. The preform is manufactured by using pure iron or an iron alloy containing no strong nitrogen compound, has a hardness of 160-250 HV0.05/10, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. Alternatively, the preform is an iron alloy containing a strong nitrogen compound, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. The lumen stent preform meets the requirements of a conventional stent for radial strength and plasticity, so that plasma nitriding is applicable to commercial preparation of a lumen stent.
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公开(公告)号：US12054796B2
公开(公告)日：2024-08-06
申请号：US17255186
申请日：2019-06-26
IPC分类号： C21C7/06 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
CPC分类号： C21C7/06 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： A method for producing steel includes: (a) a step of adding the first group of alloys to molten steel having an amount of dissolved oxygen of 0.0050 mass % or more; (b) a step of, after the step of (a), adding deoxidizer to the molten steel for deoxidation; (c) a step of, after the step of (b), adding the second group of alloys to the deoxidized molten steel; and (d) a step of, after the step of (c), adding REM to the molten steel, wherein amounts of oxygen Ob introduced from the first group of alloys (mass %) and amounts of oxygen Oa introduced from the second group of alloys (mass %) satisfy [Oa≤0.00100], [Ob+Oa≥0.00150], and [Ob/Oa≥2.0], and satisfy a formula [0.05≤REM/T.O≤0.5] after the step of (d).
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