Patents Examined by Jie Yang
  • High-strength, hot rolled abrasive wear resistant steel strip
    Patent number: 11408048
    Abstract: A high strength, hot rolled abrasive wear resistant steel strip with low carbon equivalent values, with a Brinell hardness in the range of 400-465 HBW and a tensile strength in the range of 1180-1500 MPa for strip thicknesses in the range of 3-20 mm, as well as a process for producing such a high strength, hot rolled abrasive wear resistant steel strip.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: August 9, 2022
    Assignee: TATA STEEL UK LIMITED
    Inventor: Bin Xiao
  • Hot-rolled steel sheet for coiled tubing and method for manufacturing the same
    Patent number: 11401594
    Abstract: Provided are a hot-rolled steel sheet for coiled tubing and a method for manufacturing the steel sheet. The steel sheet has a yield strength of 480 MPa or more, a tensile strength of 600 MPa or more, a yield-strength difference (?YS) of 100 MPa or more, where the yield-strength difference is defined as a difference in yield strength between before and after a prestrain-heat treatment performed for simulation of a tube-making process and a stress-relief annealing heat treatment which are currently implemented, and a yield strength of 620 MPa or more after the prestrain-heat treatment.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: August 2, 2022
    Assignee: JFE Steel Corporation
    Inventors: Hideyuki Kimura, Shuji Kawamura, Ichiro Sugimoto, Makoto Asai, Takeshi Yokota
  • Steel material for low yield ratio, high-strength steel pipe having excellent low-temperature toughness, and manufacturing method therefor
    Patent number: 11396689
    Abstract: A steel material for a low yield ratio, high-strength steel pipe having excellent low-temperature toughness according to an aspect of the present invention comprises, by weight %, 0.03-0.065% of C, 0.05-0.3% of Si, 1.7-2.2% of Mn, 0.01-0.04% of Al, 0.005-0.025% of Ti, 0.008% or less of N, 0.08-0.12% of Nb, 0.02% or less of P, 0.002% or less of S, 0.05-0.3% of Cr, 0.4-0.9% of Ni, 0.3-0.5% of Mo, 0.05-0.3% of Cu, 0.0005-0.006% of Ca, 0.001-0.04% of V, and the balance of Fe and inevitable impurities, wherein a number of deposits having an average diameter of 20 nm or less per unit area in a cross section of the steel material may be 6.5*109/mm2 or greater.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: July 26, 2022
    Assignee: POSCO
    Inventor: Jin-Ho Bae
  • Titanium alloy material
    Patent number: 11390935
    Abstract: A titanium alloy material contains: in mass %, Cu: 0.7% to 1.4%; Sn: 0.5% to 1.5%; Si: 0.10% to 0.45%; Nb: 0.05% to 0.50%; Fe: 0.00% to 0.08%; O: 0.00% to 0.08%; and the balance composed of Ti and impurities, in which in a structure, an area fraction of an ? phase is 96.0% or more and an area fraction of an intermetallic compound is 1.0% or more, and an average crystal grain size of the ? phase is 10 ?m or more and 100 ?m or less and an average grain size of the intermetallic compound is 0.1 to 3.0 ?m.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: July 19, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hidenori Takebe, Sosuke Nishiwaki, Tomonori Kunieda
  • Direct scandium alloying
    Patent number: 11384412
    Abstract: A method is provided for forming a metal alloy. The method includes preparing a mixture of scandium oxide and a flux, thereby obtaining a flux-oxide mixture, wherein the flux contains less than 20% fluoride by weight, based on the total weight of the flux; mixing the flux-oxide mixture with molten aluminum, thereby obtaining a flux-metal mixture; cooling the flux-metal mixture; and separating at least a portion of the flux from the flux-metal mixture, thereby obtaining a metal alloy.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: July 12, 2022
    Assignee: Scandium International Mining Corporation
    Inventor: Nigel Ricketts
  • Magnetic alloy powder and method for manufacturing same, as well as coil component made of magnetic alloy powder and circuit board carrying same
    Patent number: 11371122
    Abstract: In an exemplary embodiment, a magnetic alloy powder is constituted by magnetic grains 100 whose alloy phase 1 is coated with an oxide film 2, wherein: the alloy phase 1 has a Fe content of 98 percent by mass or higher and also contains Si and at least one type of non-Si element that oxidizes more easily than Fe (element M); and the oxide film 2 is such that, at the location where the content of Si as expressed in percentage by mass is the highest according to the element distributions in the direction of film thickness, this content of Si is higher than the content of Fe, and also higher than the content of element M, at this location. The magnetic alloy powder has a high Fe content and also offers excellent insulating property.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: June 28, 2022
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Yoko Orimo, Tomoo Kashiwa
  • Aluminum alloy sheet for magnetic disk and production method therefor, and magnetic disk using said aluminum alloy sheet for magnetic disk
    Patent number: 11361791
    Abstract: An aluminum alloy sheet for a magnetic disk includes an aluminum alloy comprising 0.10 to 3.00 mass % (hereafter simply “%”) of Fe, 0.1 to 3.0% of Mn, 0.003 to 1.000% of Cu, and 0.005 to 1.000 s % of Zn, wherein second phase particles having a maximum diameter of 100 ?m or more and 300 ?m or less are dispersed at a distribution density of 50 particles/mm2 or less in a region (A) occupying 25% or less of a sheet thickness from a sheet thickness center plane to opposite surfaces of the sheet, second phase particles having a maximum diameter of 100 ?m or more and 300 ?m or less are 0 particles/mm2 in a region (C) that is obtained by excluding the region (A) from a region (B) occupying 50% or less of the sheet thickness from the sheet thickness center plane to the opposite surfaces of the sheet, and the amount of Mn solid solution is 0.03 mass % or more.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: June 14, 2022
    Assignees: UACJ CORPORATION, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kotaro Kitawaki, Makoto Yonemitsu, Hideyuki Hatakeyama, Sadayuki Toda, Ryo Sakamoto, Yasuo Fujii
  • High-strength steel sheet with excellent crashworthiness characteristics and formability and method of manufacturing the same
    Patent number: 11345984
    Abstract: Provided is a high-strength steel sheet including, in % weight, carbon (C): 0.04 to 0.15%, silicon (Si): 0.01 to 1.0%, manganese (Mn): 1.8 to 2.5%, molybdenum (Mo): 0.15% or less (excluding 0%), chromium (Cr): 1.0% or less (excluding 0%), phosphorus (P): 0.1% or less, sulfur (S): 0.01% or less, aluminum (Al): 0.01 to 0.5%, nitrogen (N): 0.01% or less, boron (B): 0.01% or less (excluding 0%), antimony (Sb): 0.05% or less (excluding 0%), one or more of titanium (Ti): 0.003 to 0.06% and niobium (Nb): 0.003 to 0.06%, a balance of Fe and other unavoidable impurities, and contents of the C, the Si, the Al, the Mo and the Cr satisfy the following Expression 1: Expression 1: {(2×(Si+Al))+Mo+Cr}/C?20. The high-strength steel sheet comprises: a ferrite phase, a bainite phase, a martensite phase, and a residual austenite phase, the ferrite phase being less than 40% of area fraction in the microstructure.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: May 31, 2022
    Assignee: POSCO
    Inventors: Yeon-Sang Ahn, Chang-Hyo Seo, Kang-Hyun Choi
  • High-strength steel sheet with excellent crashworthiness characteristics and formability and method of manufacturing the same
    Patent number: 11345985
    Abstract: Provided is a high-strength steel sheet including, in % weight, carbon (C): 0.04 to 0.15%, silicon (Si): 0.01 to 1.0%, manganese (Mn): 1.8 to 2.5%, molybdenum (Mo): 0.15% or less (excluding 0%), chromium (Cr): 1.0% or less (excluding 0%), phosphorus (P): 0.1% or less, sulfur (S): 0.01% or less, aluminum (Al): 0.01 to 0.5%, nitrogen (N): 0.01% or less, boron (B): 0.01% or less (excluding 0%), antimony (Sb): 0.05% or less (excluding 0%), one or more of titanium (Ti): 0.003 to 0.06% and niobium (Nb): 0.003 to 0.06%, a balance of Fe and other unavoidable impurities, and contents of the C, the Si, the Al, the Mo and the Cr satisfy the following Expression 1: Expression 1: {(2×(Si+Al))+Mo+Cr}/C?15. The high-strength steel sheet comprises: a ferrite phase, a bainite phase, a martensite phase, and a residual austenite phase, the ferrite phase being less than 40% of area fraction in the microstructure.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: May 31, 2022
    Assignee: POSCO
    Inventors: Yeon-Sang Ahn, Chang-Hyo Seo, Kang-Hyun Choi
  • Bolt
    Patent number: 11333189
    Abstract: A bolt of the present invention is a high-strength bolt of high-carbon steel having a tempered martensite structure, wherein the composition of the bolt comprises: 0.50 mass % or more and 0.65 mass % or less of carbon (C); 1.5 mass % or more and 2.5 mass % or less of silicon (Si); 1.0 mass % or more and 2.0 mass % or less of chromium (Cr); 0.2 mass % or more and 1.0 mass % or less of manganese (Mn); and 1.5 mass % or more and 5.0 mass % or less of molybdenum (Mo); a total content of impurities being phosphor (P) and sulfur (S) is 0.03 mass % or more; and the remaining is iron (Fe). Furthermore, the carbon concentration satisfies the following Formula (1): 0.75?X<1 . . . Formula (1) wherein, in Formula (1), X represents surface carbon concentration/inner carbon concentration.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 17, 2022
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Takahiro Hamada, Daisuke Kobayashi
  • Material for hot stamping and method for manufacturing the same
    Patent number: 11326226
    Abstract: Provided is a material for hot stamping including: a steel sheet including carbon (C) in an amount of 0.19 wt % to 0.25 wt %, silicon (Si) in an amount of 0.1 wt % to 0.6 wt %, manganese (Mn) in an amount of 0.8 wt % to 1.6 wt %, phosphorus (P) in an amount less than or equal to 0.03 wt %, sulfur (S) in an amount less than or equal to 0.015 wt %, chromium (Cr) in an amount of 0.1 wt % to 0.6 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: Grant
    Filed: December 2, 2020
    Date of Patent: May 10, 2022
    Assignee: Hyundai Steel Company
    Inventors: Nu Ri Shin, Hun Chul Kang, Ji Hee Son, Byoung Hoon Kim
  • Iron based alloy suitable for providing a hard and corrosion resistant coating on a substrate, article having a hard and corrosion resistant coating, and method for its manufacture
    Patent number: 11326239
    Abstract: An iron-based alloy that is able to provide a coating on a substrate, the coating having simultaneously high hardness, corrosion resistance and bonding strength to the substrate. The iron-based alloy has 16.00-20.00% by weight Cr; 0.20-2.00% by weight B; 0.20-4.00% by weight Ni; 0.10-0.35% by weight C; 0.10-4.00% by weight Mo; optionally 1.50% by weight or less Si; optionally 1.00% by weight or less Mn, optionally 3.90% by weight or less Nb; optionally 3.90% by weight or less V; optionally 3.90% by weight or less W; and optionally 3.90% by weight or less Ti; the balance being Fe and unavoidable impurities; with the proviso that the total amount of Mo, Nb, V, W and Ti is in the range of 0.1-4.0% by weight of the alloy.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 10, 2022
    Assignee: HÖGANÄS GERMANY GMBH
    Inventors: Cecilia Cao, Chris Zhu, Bruc Zhang, Crystal Liu, Hans Hallén
  • Rolling sliding member and method of producing the same, and rolling bearing including rolling sliding member
    Patent number: 11326643
    Abstract: A rolling sliding member includes a base part and a surface layer. The base part has a composition that includes 0.30 mass % to 0.45 mass % of carbon, 0.15 mass % to 0.45 mass % of silicon, 0.40 to 1.50 mass % of manganese, 0.60 mass % to 2.00 mass % of chromium, 0.10 mass % to 0.35 mass % of molybdenum, 0.20 mass % to 0.40 mass % of vanadium, and 0.005 mass % to 0.100 mass % of aluminum, and a remainder of iron and inevitable impurities. The surface layer is positioned around the base part. The surface layer has a Vickers hardness of 700 to 800 and a retained austenite content of 25 volume % to 50 volume %. The thickness of a grain boundary oxide layer satisfies Formula: thickness of grain boundary oxide layer?equivalent diameter of rolling sliding member×1.4×10?3.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: May 10, 2022
    Assignees: JTEKT CORPORATION, NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohei Kanetani, Takashi Sada, Tomohiro Yamashita, Takahisa Suzuki, Yutaka Neishi, Daisuke Hirakami
  • Multilayer block core, multilayer block, and method for producing multilayer block
    Patent number: 11322281
    Abstract: A multilayer block core includes a multilayer block in which nanocrystalline alloy ribbon pieces are layered, the nanocrystalline alloy ribbon pieces having a composition represented by the following Composition Formula (A). Fe100-a-b-c-dBaSibCucMd??Composition Formula (A) In Composition Formula (A), each of a, b, c, and d is an atomic percent; the expressions 13.0?a?17.0, 3.5?b?5.0, 0.6?c?1.1, and 0?d?0.5 are satisfied; and M represents at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: May 3, 2022
    Assignees: HITACHI METALS, LTD., Metglas, Inc.
    Inventor: Motoki Ohta
  • High-strength seamless steel pipe for oil country tubular goods, and method for producing the same
    Patent number: 11313007
    Abstract: Provided herein is a high-strength seamless steel pipe containing a particular chemical composition. The volume fraction of tempered martensite is 90% or more in terms of a volume fraction. The number of nitride inclusions with a particle diameter of 4 ?m or more is 50 or less per 100 mm2, the number of nitride inclusions with a particle diameter of less than 4 ?m is 500 or less per 100 mm2, the number of oxide inclusions with a particle diameter of 4 ?m or more is 40 or less per 100 mm2, and the number of oxide inclusions with a particle diameter of less than 4 ?m is 400 or less per 100 mm2 in a cross section perpendicular to a rolling direction.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: April 26, 2022
    Assignee: JFE Steel Corporation
    Inventors: Masao Yuga, Mitsuhiro Okatsu
  • Wastegate component comprising a novel alloy
    Patent number: 11306376
    Abstract: The present invention relates to a waste gate component for a turbo charger comprising an alloy comprising about 30 to about 42 wt.-% Ni, about 15 to about 28 wt.-% Cr, about 1 to about 5 wt.-% Cr, about 1 to about 4 wt.-% Ti, and at least about 20 wt.-% Fe, and to processes for preparing such a waste gate component.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: April 19, 2022
    Assignee: BorgWarner Inc.
    Inventors: Gerald Schall, Melanie Gabel, Stephan Weniger
  • Blade material
    Patent number: 11306370
    Abstract: Provided is a blade material having high strength. The blade material contains, in % by mass, 0.5 to 0.8% of C, 1.0% or less of Si, 1.0% or less of Mn, 11 to 15% of Cr, and 0.1 to 0.8% of V, the remainder includes Fe and inevitable impurities, and has a thickness of 0.5 mm or less, wherein the structure of the blade material as observed after polishing the surface thereof has ferrites and carbides, the carbides have an average particle diameter of 0.5 ?m or less, and a proportion of carbides containing V in the carbides is 50% or less in terms of a proportion in an area of a field of view.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: April 19, 2022
    Assignee: HITACHI METALS, LTD.
    Inventor: Kazuhiro Yamamura
  • Duplex stainless steel
    Patent number: 11306378
    Abstract: The present disclosure relates to a duplex stainless steel comprising in weight % (wt %): C less than 0.03; Si less than 0.60; Mn 0.40 to 2.00; P less than 0.04; S less than or equal to 0.01; Cr more than 30.00 to 33.00; Ni 6.00 to 10.00; Mo 1.30 to 2.90; N 0.15 to 0.28; Cu 0.60 to 2.20; Al less than 0.05; balance Fe and unavoidable impurities. The present disclosure also relates to a component or a construction material comprising the duplex stainless steel. Additionally, the present disclosure also relates to a process for manufacturing a component comprising said duplex stainless steel.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: April 19, 2022
    Assignee: Sandvik Intellectual Property AB
    Inventors: Tomas Antonsson, Lars Nylöf
  • Austenitic stainless steel product having excellent surface properties and manufacturing method of the same
    Patent number: 11299799
    Abstract: An austenitic stainless steel product having excellent surface characteristics and a manufacturing method therefor are disclosed. The disclosed austenitic stainless steel product comprises an austenitic stainless steel comprising, by weight percent, 0.005 to 0.15% of C, 0.1 to 1.0% of Si, 0.1 to 2.0% of Mn, 6.0 to 8.0% of Ni, 16 to 18% of Cr, 0.1 to 4.0% of Cu, 0.005 to 0.2% of N, 0.01 to 0.2% of Mo, and the remainder comprising iron (Fe) and other unavoidable impurities, and a Ni surface negative segregation thereof defined by the following formula (1) is 0.6 to 0.9 and the martensite fraction thereof is 10 to 30%. (CNi-Min)/(CNi-Ave)??formula (1) Here, CNi-min is the minimum concentration of Ni on the surface and CNi-Ave is the average concentration of Ni on the surface.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: April 12, 2022
    Assignee: POSCO
    Inventors: Hyung Gu Kang, Jae-Hong Shim, Gyu Jin Jo, Dong Chul Chae
  • Steel plate and method of producing same
    Patent number: 11299798
    Abstract: Excellent CTOD properties for multilayer welding joint is provided for a steel plate. The steel plate comprises a specific chemical composition with Ceq of 0.45% or less where Ceq (%)=[C]+[Mn]/6+([Cu]+[Ni])/15+([Cr]+[Mo]+[V])/5 . . . (1) and Pcm of 0.22% or less where Pcm (%)=[C]+[Si]/30+([Mn]+[Cu]+[Cr])/20+[Ni]/60+[Mo]/15+[V]/10+5 [B] . . . (2); an average effective grain size of 20 ?m or less at a mid-thickness part of the steel plate; and porosities having an equivalent circular diameter of 200 ?m or more, the number of the porosities per mm2 being 0.1/mm2 or less.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: April 12, 2022
    Assignee: JFE STEEL CORPORATION
    Inventors: Yoshiko Takeuchi, Katsuyuki Ichimiya, Kazukuni Hase