Patents Examined by Jie Yang
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Patent number: 11898218Abstract: Provided is a material for hot stamping including: a steel sheet including carbon (C) in an amount of 0.28 wt % to 0.50 wt %, silicon (Si) in an amount of 0.15 wt % to 0.70 wt %, manganese (Mn) in an amount of 0.5 wt % to 2.0 wt %, phosphorus (P) in an amount less than or equal to 0.05 wt %, sulfur (S) in an amount less than or equal to 0.01 wt %, chromium (Cr) in an amount of 0.1 wt % to 0.5 wt %, boron (B) in an amount of 0.001 wt % to 0.005 wt %, balance iron (Fe), and other inevitable impurities; and fine precipitates distributed in the steel sheet, wherein the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V), and trap hydrogen.Type: GrantFiled: December 2, 2020Date of Patent: February 13, 2024Assignee: Hyundai Steel CompanyInventors: Nu Ri Shin, Hun Chul Kang, Ji Hee Son, Byoung Hoon Kim
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Patent number: 11898230Abstract: A high-strength steel sheet according to the present invention includes a specific chemical composition, and a steel structure in which a total area fraction of martensite and bainite in a position of ¼ of a sheet thickness is 95% or more and 100% or less, the balance in a case where the total area fraction is not 100% contains retained austenite, and an area fraction of ferrite in a region extending up to 10 ?m in a sheet thickness direction from a surface is 10% or more and 40% or less, in which a tensile strength is 1320 MPa or more, and a Vickers hardness in a position of 15 ?m in the sheet thickness direction from the surface satisfies a specified formula.Type: GrantFiled: June 10, 2019Date of Patent: February 13, 2024Assignee: JFE Steel CorporationInventors: Shimpei Yoshioka, Yoshihiko Ono
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Patent number: 11891863Abstract: Hardfacing is used to protect wear surfaces of drill bits and other downhole tools. A hardfacing member can be formed by heating a metal matrix material, e.g., via a laser process, injecting a plurality of particles into the heated metal matrix material, disposing the mixture on at least a portion of a substrate thereby forming a hardfacing member having a particle-embedded metal matrix material, and attaching the hardfacing member to a main body.Type: GrantFiled: August 29, 2018Date of Patent: February 6, 2024Assignee: Halliburton Energy Services, Inc.Inventors: Krutibas Panda, Brian Lee Doud
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Patent number: 11834734Abstract: A method of manufacturing a stainless steel fastener includes following operations. Firstly, a stainless steel blank is prepared and contains from 1 to 3.5 wt % molybdenum, from 10 to 16 wt % chromium, from 0.5 to 3.5 wt % nickel, from 0.05 to 0.3 wt % nitrogen, carbon which is not more than 0.2 wt %, iron, and other inevitable compositions. Initially, a steel crystalline structure of the blank is martensite whose hardness ranges from 230 to 350 HV. Then, the blank is annealed to transform a partial crystalline structure of the steel crystalline structure into ferrite. The annealed blank experiences a cutting operation, a head forming operation, and a thread forming operation sequentially. Thereafter, a heat treating operation is executed to transform the partial crystalline structure from ferrite into martensite to complete a stainless steel fastener whose hardness is increased and is at least 500 HV, which facilitates a direct drilling effect.Type: GrantFiled: December 29, 2021Date of Patent: December 5, 2023Inventor: Hsiang Wu
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Patent number: 11834737Abstract: The titanium alloy coating film of the present invention is represented by (Ti1-aMoa)1-xNx, which satisfies 0.0423 a?0.32 and 0.40?x?0.60 and in which the film hardness thereof satisfies at least a condition of 3,000 HV or more; and the titanium alloy target material is represented by Ti1-aMoa, which satisfies 0.04?a?0.32, and in which, when an X-ray diffraction profile is measured on a surface of the target material, a diffraction peak intensity attributed to a single metal phase of Mo is not detected.Type: GrantFiled: March 29, 2017Date of Patent: December 5, 2023Assignee: DAIDO STEEL CO., LTD.Inventors: Hiromasa Takeda, Wataru Araki, Kazuya Sakaguchi, Katsuko Ofuji, Jun Totsuka, Kazuki Minami
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Patent number: 11827964Abstract: A coated steel member includes: a steel sheet substrate containing, as a chemical composition, by mass %, C: 0.25% to 0.65%, Si: 0.10% to 1.00%, Mn: 0.30% 1.00%, P: 0.050% or less, S: 0.0100% or less, N: 0.010% or less, Ti: 0.010% to 0.100%, B: 0.0005% to 0.0100%, Nb: 0.02% to 0.10%, Mo: 0.10% to 1.00%, Cu: 0.15% to 1.00%, and Ni: 0.05% to 0.25%; and a coating formed on a surface of the steel sheet substrate and containing Al and Fe. The maximum Cu content in a range from the surface to a depth of 5.0 ?m is 150% or more of the Cu content of the steel sheet substrate.Type: GrantFiled: November 20, 2020Date of Patent: November 28, 2023Assignee: NIPPON STEEL CORPORATIONInventor: Shinichiro Tabata
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Patent number: 11826832Abstract: A method for gas atomization of a titanium alloy, nickel alloy, or other alumina (Al2O3)-forming alloy wherein the atomized particles are exposed as they solidify and cool in a very short time to multiple gaseous reactive agents for the in-situ formation of a passivation reaction film on the atomized particles wherein the reaction film retains a precursor halogen alloying element that is subsequently introduced into a microstructure formed by subsequent thermally processing of the atomized particles to improve oxidation resistance.Type: GrantFiled: April 22, 2020Date of Patent: November 28, 2023Assignee: Iowa State University Research Foundation, Inc.Inventors: Andrew J. Heidloff, Joel R. Rieken, Iver E. Anderson
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Patent number: 11827958Abstract: The disclosure discloses a high-speed spinning magnesium alloy and a preparation method thereof, the magnesium alloy has Mg—Al—Zn—Mn—Sr alloy with a high formability and high strength, and its chemical composition mass percentage is: Al: 2.4-4.5 wt. %; Zn: 0.6-1.2 wt. %; Mn: 0.4-0.6 wt. %; Sr: 0.15-0.3 wt. %; the balance is Mg. The present disclosure adopts the principle that by increasing the content of Mn in the magnesium alloy, a large amount of Mn-rich phase is generated during the alloy preparation process, and the degree of subcooling is controlled so that a fine spherical dispersed nano-scale Mn-rich phase is obtained during the solidification process. The nano-scale Mn-rich precipitate phase can pin the grain boundaries and inhibit the grain boundary migration to refine grains and achieve the effect of improving the strength.Type: GrantFiled: January 14, 2022Date of Patent: November 28, 2023Assignee: CITIC Dicastal Co., Ltd.Inventors: Lixin Huang, Zhihua Zhu, Shiwen Xu, Jingru Shen, Liguang Xie, Naizheng Hu
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Patent number: 11821049Abstract: A waste gate component for a turbo charger made of a ferritic steel including C, Cr, Ni, Nb, V, Mn, and optionally Si, and Ti as main alloying elements.Type: GrantFiled: July 28, 2017Date of Patent: November 21, 2023Assignee: BorgWarner Inc.Inventors: Gerald Schall, Ingo Dietrich, Volker Paul, Nico Kanoffsky
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Patent number: 11807924Abstract: An Al plated electric resistance welded steel pipe for hardening use suppressing the formation of scale to the inside of the plating layer while performing hot forming and an Al plated hollow member using that Al plated electric resistance welded steel pipe, wherein the Al plated electric resistance welded steel pipe for hardening use is comprised of a base material made of a tubular steel plate and having a predetermined chemical composition and an electric resistance welded zone provided at a seam portion of the steel plate and extending in a longitudinal direction of the steel plate, the base material is further provided with an intermetallic compound layer positioned on the surface of the steel plate and including an Al—Fe—Si-based intermetallic compound and an Al plating layer positioned on the surface of the intermetallic compound layer and containing Al and Si, and 70×X/D?Y/t?30 is satisfied, wherein X (?m) is a thickness of the intermetallic compound layer, Y (?m) is a thickness of the Al plating layeType: GrantFiled: November 20, 2017Date of Patent: November 7, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Jun Maki, Soshi Fujita, Toyomitsu Nakamura
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Patent number: 11807919Abstract: An aluminum alloy fin material for a heat exchanger is made of an aluminum alloy including 0.05 mass % to 0.5 mass % of Si, 0.05 mass % to 0.7 mass % of Fe, 10 mass % to 2.0 mass % of Mn, 0.5 mass % to 1.5 mass % of Cu, and 3.0 mass % to 7.0 mass % of Zn, with the balance being Al and unavoidable impurities. In an L-ST plane thereof, second-phase grains having an equivalent circle diameter equal to or more than 0.030 ?m and less than 0.50 ?m have a perimeter density of 0.30 ?m/?m2 or more, second-phase grains having an equivalent circle diameter equal to or more than 0.50 ?m have a perimeter density of 0.030 ?m/?m2 or more, and specific resistance thereof at 20° C. is 0.030 ??m or more.Type: GrantFiled: December 1, 2017Date of Patent: November 7, 2023Assignee: UACJ CORPORATIONInventors: Wataru Nakagawa, Atsushi Fukumoto, Junichi Mochizuki, Tatsuya Ide
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Patent number: 11807923Abstract: A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.62 mass % and not more than 0.68 mass % C, not less than 1.6 mass % and not more than 2 mass % Si, not less than 0.2 mass % and not more than 0.5 mass % Mn, not less than 1.7 mass % and not more than 2 mass % Cr, and not less than 0.15 mass % and not more than 0.25 mass % V, with the balance being Fe and unavoidable impurities. A value obtained by dividing a sum of a Si content and a Mn content by a Cr content is not less than 0.9 and not more than 1.4. The steel constituting the main body has a tempered martensite structure.Type: GrantFiled: June 17, 2020Date of Patent: November 7, 2023Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hiromu Izumida, Tetsuya Nakajima
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Patent number: 11795530Abstract: The invention relates to a non-grain-oriented electrical steel strip or sheet, in particular for electrical applications, an electrical component produced from such an electrical steel strip or sheet, a process for producing an electrical steel strip or sheet and the use of such an electrical steel strip or sheet in components for electrical applications.Type: GrantFiled: January 23, 2019Date of Patent: October 24, 2023Assignees: ThyssenKrupp Steel Europe AG, thyssenkrupp AGInventors: Sebastian Sieron, Philipp Szary, Olaf Fischer, Abdullah Kahveci, Karl Telger
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Patent number: 11795527Abstract: The present invention relates to an alloy for medical use, including Pt, Co, Cr, Ni, and Mo. The alloy includes 10 atom % or more and 30 atom % or less of Pt, 20 atom % or more and 31 atom % or less of Cr, 5 atom % or more and 24 atom % or less of Ni, 4 atom % or more and 8 atom % or less of Mo, the balance Co, and unavoidable impurities, and a ratio of the Ni content (CNi) to the Pt content (CPt), CNi/CPt is 1.5 or less. The present invention can be applied to various kinds of devices for medical use, such as catheter, embolic coils, and guide wires, in addition to stents such as flow-diverter stents.Type: GrantFiled: November 18, 2019Date of Patent: October 24, 2023Assignee: TANAKA KIKINZOKU KOGYO K.K.Inventors: Shubham Yadav, Yuya Kato, Kenji Goto, Kunihiro Shima
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Patent number: 11795531Abstract: A high-strength galvanized steel sheet of the present invention includes a steel sheet having a specific chemical composition, and a steel structure containing, in terms of area ratio, 4% or more and 20% or less of retained austenite, 30% or less (including 0%) of ferrite, 40% or more of martensite, and 10% or more and 50% or less of bainite; and a galvanized layer provided on the steel sheet, in which an amount of diffusible hydrogen in the steel is less than 0.20 mass ppm, a tensile strength is 1100 MPa or more, a relationship between a tensile strength TS (MPa), an elongation El (%), and a sheet thickness t (mm) satisfies a (1) formula below, and a yield ratio YR is 67% or more. TS×(El+3?2.Type: GrantFiled: March 29, 2019Date of Patent: October 24, 2023Assignee: JFE Steel CorporationInventors: Hiromi Yoshitomi, Yoshihiko Ono, Tatsuya Nakagaito
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Patent number: 11788170Abstract: Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.Type: GrantFiled: May 28, 2019Date of Patent: October 17, 2023Assignee: Stillwater Mining CompanyInventors: Dave Shuck, Jerry Kolstad, Mark Rapkoch, Grenvil Marquis Dunn
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Patent number: 11773459Abstract: A method for the direct reduction of feedstock, containing metal-oxide, to form metallic material, by contact with hot reduction gas in a reduction assembly (1): the product of the direct reduction process is discharged from the reduction assembly by a product discharge apparatus, which is flushed with seal gas, drawn off from the vent gas and subsequently dedusted. At least one portion of the dedusted vent gas is used as a combustion energy source during the production of the reduction gas, and/or as a component of a furnace fuel gas during a combustion process for heating the reduction gas, and/or as a component of the reduction gas. Apparatus for carrying out the method is disclosed.Type: GrantFiled: June 8, 2017Date of Patent: October 3, 2023Inventor: Robert Millner
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Patent number: 11773472Abstract: The present invention relates to a magnesium alloy sheet and a manufacturing method thereof. In detail, the magnesium alloy sheet includes 0.5 to 3.5 wt % of Al, 0.5 to 1.5 wt % of Zn, 0.1 to 1.0 wt % of Ca, 0.01 to 1.0 wt % of Mn, a remainder of Mg, and other inevitable impurities with respect to an entire 100 wt % of a magnesium alloy sheet, wherein an average crystal grain size of the magnesium alloy sheet is 3 to 15 ?m, the magnesium alloy sheet includes a stringer, and a length of the stringer in a rolling direction (RD) is equal to or less than the maximum value of 50 ?m.Type: GrantFiled: December 21, 2018Date of Patent: October 3, 2023Assignee: POSCO CO., LTDInventors: Jun Ho Park, Hyun Bom Lee, Jae Joong Kim, Oh-Duck Kwon
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Patent number: 11767572Abstract: Disclosed are an alloy steel including boron (B) to provide improved hardenability, cobalt (Co) to provide improve strength, and the method of preparing the alloy steel. In particular, components of the alloy steel composition are appropriately mixed to form 100 vol % of tempered martensite as a constituent structure, thereby exhibiting excellent hydrogen embrittlement resistance and strength.Type: GrantFiled: November 30, 2022Date of Patent: September 26, 2023Assignees: Hyundai Motor Company, Kia CorporationInventor: Hyun Je Sung
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Patent number: 11767585Abstract: The invention relates to a steel wire suitable for making a spring or medical wire products which remarkably improve the performance of conventional stainless steel wire. The steel comprises (in wt. %): C: 0.02 to 0.15, Si: 0.1 to 0.9, Mn: 0.8 to 1.6, Cr 16 to 20, Ni: 7.5 to 10.5, Mo: ?3, Al: 0.5 to 2.5, Ti: ?0.15, N: ?0.05, optional elements, and impurities, balance Fe, wherein the total amount of Cr and Ni is 25 to 27 wt. %, and wherein the steel has a microstructure including, in volume % (vol. %), martensite: 40 to 90, austenite: 10 to 60, and delta ferrite: ?5.Type: GrantFiled: April 24, 2019Date of Patent: September 26, 2023Assignees: SUZUKI-SUMIDEN STAINLESS STEEL WIRE CO., LTD, SUZUKI GARPHYTTAN ABInventors: Johan Norstrom, David Thureborn, Fumito Kanno, Masaki Ishihara