Patents Examined by Jophy S Koshy
  • Patent number: 10435761
    Abstract: A heat-treated steel material includes: a chemical composition expressed by, in mass %: C: 0.16% to 0.38%; Mn: 0.6% to 1.5%; Cr: 0.4% to 2.0%; Ti: 0.01% to 0.10%; B: 0.001% to 0.010%; Si: 0.20% or less; P: 0.05% or less; S: 0.05% or less; N: 0.01% or less; Ni: 0% to 2.0%; Cu: 0% to 1.0%; Mo: 0% to 1.0%; V: 0% to 1.0%; Al: 0% to 1.0%; Nb: 0% to 1.0%; REM: 0% to 0.1%; and the balance: Fe and impurities; and a structure expressed by: retained austenite: 1.5 volume % or less; and the balance: martensite.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: October 8, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shinichiro Tabata, Kazuo Hikida, Nobusato Kojima, Naomitsu Mizui
  • Patent number: 10400313
    Abstract: A method for producing a rolled product 0.5 to 10 mm thick made from an aluminum alloy comprising, in particular, copper and lithium, in which, after solution annealing and quenching, a short heat treatment is carried out in which the sheet reaches a temperature of between 145° C. and 175° C. for 0.1 to 45 minutes, the speed of heating being between 3 and 600° C./min. The sheet obtained at the end of the method according to the invention has high corrosion resistance and is capable of being shaped for producing a structural element for an aircraft, in particular an aircraft fuselage skin.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: September 3, 2019
    Assignee: CONSTELLIUM ISSOIRE
    Inventors: Christophe Sigli, Bernard Bes, Frank Eberl
  • Patent number: 10385430
    Abstract: The present invention provides a steel material, such as a high-strength spring, that has excellent fatigue properties, and, more specifically, a steel material, such as the high-strength spring, that can improve the fatigue properties in a high-strength region more easily, without increasing an alloy cost. The steel material includes, in percent by mass, C: 0.5 to 1.0%, Si: 1.5 to 2.50%, Mn: 0.5 to 1.50%, P: more than 0% to 0.020% or less, S: more than 0% to 0.020% or less, Cr: more than 0% to 0.2% or less, Al: more than 0% to 0.010% or less, N: more than 0% to 0.0070% or less, and O: more than 0% to 0.0040% or less, and the balance consisting of iron and inevitable impurities, wherein Cr and Si contents satisfy a formula of Cr×Si?0.20, a ratio of tempered martensite in a steel microstructure is 80% or more by area, and a number density of particles of Cr-containing carbide or carbonitride having a circle-equivalent diameter of 50 nm or more in the steel microstructure is 0.10 particles/?m2 or less.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 20, 2019
    Assignee: KOBE STEEL, LTD.
    Inventors: Hiroshi Oura, Tomokazu Masuda, Nao Yoshihara, Takayuki Naito, Akito Suzuki
  • Patent number: 10378079
    Abstract: A stainless steel is provided having good corrosion resistance and good low-temperature toughness. A stainless steel contains, in mass %, Cr: 15.5 to 18.0%. The stainless steel has a matrix structure having, by volume ratio, 40 to 80% tempered martensite, 10 to 50% ferrite and 1 to 15% austenite. When a microstructure image obtained by photographing the matrix structure at a magnification of 100 times is positioned in an x-y coordinate system and each of 1024×1024 pixels is represented by a gray scale level, ? defined by Equation (2) is not smaller than 1.55: 1.0?Mo+0.5W?3.5??(1). Here, Mo and W are the Mo and W contents in mass %.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: August 13, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yusaku Tomio, Hiroshi Kaido
  • Patent number: 10364483
    Abstract: One or more substitutional elements may be used to reduce the solution treatment temperature and required quench rates for hardening of 60-NITINOL. The advantages of modified NITINOL include that less energy is consumed during the heat treatment process, the material is subjected to less thermal distortion, and less machining is required. Modified NITINOL may have adequate hardness for bearing applications and may display highly elastic behavior.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: July 30, 2019
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Malcolm K. Stanford, Ronald D. Noebe, Christopher DellaCorte, Glen Bigelow, Fransua Thomas
  • Patent number: 10358707
    Abstract: A Cr-containing ferritic stainless steel sheet is desired with improved corrosion resistance and rust resistance as well as improved ridging resistance. To achieve these results, the ferritic stainless steel sheet derives the relationship between Ap, which shows the ?-phase rate at 1100° C. due to a predetermined ingredient, and Sn in ferritic stainless steel which becomes a dual phase structure of ?+? in the hot rolling temperature region, applies and adds Sn, and hot rolls the steel to give a total rolling rate of 15% or more in 1100° C. or higher hot rolling to thereby obtain ferritic stainless steel sheet which has good ridging resistance, which also has excellent corrosion resistance and rust resistance, and which can be applied to general durable consumer goods, wherein 0.060?Sn?0.634?0.0082Ap and 10?Ap?70.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 23, 2019
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masaharu Hatano, Eiichiro Ishimaru, Akihiko Takahashi, Ken Kimura, Shinichi Teraoka
  • Patent number: 10337086
    Abstract: A magnesium alloy suitable for use as a corrodible downhole article. The alloy has a corrosion rate of at least 50 mg/cm2/day in 15% KCl at 93° C. and a 0.2% proof strength of at least 50 MPa when tested using standard tensile test method ASTM B557-10.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: July 2, 2019
    Assignee: Magnesium Elektron Limited
    Inventors: Timothy E Wilks, Mark Turski
  • Patent number: 10316382
    Abstract: In the production of a non-oriented electrical stress sheet by hot rolling a steel slab containing, by mass %, C: not more than 0.005%, Si: not more than 8.0%, Mn: 0.03-3.0%, P: not more than 0.2%, S: not more than 0.005%, Al: not more than 3.0%, N: not more than 0.005%, Ni: not more than 3%, Cr: not more than 5%, Ti: not more than 0.005%, Nb: not more than 0.003%, As: not more than 0.005% and O: not more than 0.005%, subjecting to one cold rolling or two or more cold rollings interposing an intermediate annealing therebetween after conducting a hot band annealing or without conducting a hot band annealing and subjecting to a finish annealing, an average heating rate from 600° C. to 700° C. during the heating process in the finish annealing is set to not less than 50° C./sec.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 11, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Tomoyuki Okubo, Kohei Kurihara, Yoshihiko Oda, Hiroaki Nakajima
  • Patent number: 10294554
    Abstract: A copper alloy sheet material, having an alloy composition containing at least one of Ni and Co in an amount of 1.80 to 8.00 mass % in total, Si in an amount of 0.40 to 2.00 mass %, and at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.000 to 2.000 mass % in total, with the balance being copper and unavoidable impurities, wherein the major axis of the grains in the matrix is 12 ?m or less; and wherein the orientation density of the {110}<001> orientation is 4 or more, and the orientation density of the {110}<112> orientation is 10 or more; a connector using thereof; and a method of producing the copper alloy sheet material.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: May 21, 2019
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventor: Hiroshi Kaneko
  • Patent number: 10294555
    Abstract: A copper alloy sheet material, having an alloy composition containing at least one of Ni and Co in an amount of 1.80 to 8.00 mass % in total, Si in an amount of 0.40 to 2.00 mass %, and at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.000 to 2.000 mass % in total, with the balance being copper and unavoidable impurities, wherein the orientation density of the {121}<111> orientation is 6 or less, and the orientation density of the {110}<001> orientation is 4 or more; and wherein the density of grains having the {110}<001> orientation is 0.40 grains/?m2 or more; a connector using thereof; and a method of producing the copper alloy sheet material.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: May 21, 2019
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventor: Hiroshi Kaneko
  • Patent number: 10294540
    Abstract: A steel wire for a spring, in which the sag resistance and the fatigue characteristics are improved by production processes without addition of alloy elements, is provided. The spring has a structure obtained by quenching and tempering and includes a first layer at a surface thereof, a second layer interior to the first layer, and a third layer, which is interior to the second layer and reaches a center of the spring, and the second layer has lower hardness than the first and the third layers.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: May 21, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Hirokuni Fuchigami
  • Patent number: 10280487
    Abstract: The high alloy for oil well according to the present embodiment consists of, in mass %, C: 0.03% or less, Si: 1.0% or less, Mn: 0.05 to 1.5%, P: 0.03% or less, S: 0.03% or less, Ni: 26.0 to 40.0%, Cr: 22.0 to 30.0%, Mo: 0.01% or more to less than 5.0%, Cu: 0.1 to 3.0%, Al: 0.001 to 0.30%, N: more than 0.05% to 0.30% or less, O: 0.010% or less, and Ag: 0.005 to 1.0%, wherein the alloy satisfies the following Formula (1) and (2), wherein the high alloy for oil well has yield strength of 758 MPa or more: 5×Cu+(1000×Ag)2?40??(1) Cu+6×Ag?500×(Ca+Mg+REM)?3.5??(2) where, each element symbol in each Formula is substituted by the content (in mass %) of each element.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: May 7, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masayuki Sagara, Akiko Tomio
  • Patent number: 10271971
    Abstract: Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: April 30, 2019
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Kotaro Hanada, Kunio Matsuzaki
  • Patent number: 10266931
    Abstract: An aluminum alloy is provided that includes magnesium (Mg) of about 8.0 wt % to 10.5 wt %, silicon (Si) of about 1.9 wt % to 3.4 wt %, copper (Cu) of about 0.4 wt % to 2.0 wt %, and a balance of Al. In addition, a vehicle part is manufactured using the same aluminum alloy.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: April 23, 2019
    Assignee: Hyundai Motor Company
    Inventors: Hee Sam Kang, Eun Ji Hong
  • Patent number: 10246757
    Abstract: A bearing part according the present invention includes, as the chemical composition, by mass %, C: 0.95% to 1.10%, Si: 0.10% to 0.70%, Mn: 0.20% to 1.20%, Cr: 0.90% to 1.60%, Al: 0.010% to 0.100%, N: 0.003% to 0.030%, P: 0.025% or less, S: 0.025% or less, O: 0.0010% or less, and optionally Mo: 0.25% or less, B: 0.0050% or less, Cu: 1.0% or less, Ni: 3.0% or less, and Ca: 0.0015% or less, and a remainder including Fe and impurities; metallographic structure includes a retained austenite, a spherical cementite and a martensite; an amount of the retained austenite is 15% to 25%, by volume %; an average grain size of prior-austenite is 8.0 ?m or less; and a number density of a void having a circle equivalent diameter of 0.02 ?m to 3.0 ?m is 2000 mm?2 or less in the metallographic structure.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: April 2, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masashi Sakamoto, Junichi Kodama, Yutaka Neishi
  • Patent number: 10240225
    Abstract: Disclosed herein is a technique to reduce the residual stress of a steel material while improving the mechanical property and the corrosion resistance of the material. A steel material is provided that includes a plurality of ferrite crystal grains, and a laminar iron-rich phase formed at unidirectionally occurring grain boundaries of all grain boundaries of the ferrite crystal grains. A material processing method is provided that includes: heating a steel material that contains a plurality of ferrite crystal grains; applying a magnetic field to a heated portion while heating the steel material; applying an electric field to the heated portion in a direction that crosses the direction of the applied magnetic field while heating the steel material; and measuring a displacement occurring in the steel material under the magnetic field and the electric field.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: March 26, 2019
    Assignee: HITACHI, LTD.
    Inventors: Matahiro Komuro, Masafumi Noujima, Naoya Okizaki
  • Patent number: 10240219
    Abstract: Disclosed is a high frequency heat treatment method of hot-stamping-treated ultra-high strength parts, which comprises: a first step of heating the parts until the temperature of a heat treatment zone thereof becomes the AC3 transformation point or higher; a second step of maintaining the temperature until phase transformation of the heat treatment zone to austenite is completed; and a third step of cooling the heat treatment zone to transform the structure thereof to ferrite-pearlite. The present method improves the energy absorbing efficiency by increasing the parts' elongation ratio by locally forming a softening structure which absorbs energy.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: March 26, 2019
    Assignee: Hyundai Motor Company
    Inventors: Seung-Hyun Hong, Ji-Hong Yoo
  • Patent number: 10213879
    Abstract: A solder alloy has an alloy composition consisting of, in mass %: Bi: 0.1 to 0.8%; Ag: 0 to 0.3%; Cu: 0 to 0.7%; P: 0.001 to 0.1%, with the balance being Sn. A total amount of Ag and Bi is from 0.3 to 0.8% in the alloy composition.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: February 26, 2019
    Assignee: SENJU METAL INDUSTRY CO., LTD.
    Inventors: Shunsaku Yoshikawa, Hikaru Nomura
  • Patent number: 10174410
    Abstract: A heat-resistant molybdenum alloy of this invention comprises a first phase containing Mo as a main component and a second phase comprising a Mo—Si—B-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 8, 2019
    Assignee: A.L.M.T. Corp.
    Inventors: Takanori Kadokura, Hidenobu Nishino, Ayuri Tsuji, Shigekazu Yamazaki, Akihiko Ikegaya
  • Patent number: 10167538
    Abstract: A steel pipe, consisting of, in terms of mass %: from 0.06% to 0.25% of C, 0.50% or less of Si, 1.00% to 1.80% of Mn, 0.030% or less of P, 0.020% or less of S, 0.08% or less of Al, 0.008% or less of N, 0.080% or less of Nb, and a remainder consisting of Fe and unavoidable impurities, wherein a compressive residual stress at an outer surface measured by an X-ray method is 250 MPa or more, and a compressive residual stress at a position at a depth of 1 mm from the outer surface measured by the X-ray method is 70% or more of the compressive residual stress at the outer surface measured by the X-ray method.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: January 1, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yosuke Kiyota, Takaaki Fukushi, Hideyuki Nakamura