Patents Examined by Roy King
  • Aircraft engine shaft comprising a maraging steel having a tensile strength of 2300MPa or more
    Patent number: 9506125
    Abstract: The present invention provides a maraging steel containing: 0.10?C?0.30 mass %, 6.0?Ni?9.4 mass %, 11.0?Co?20.0 mass %, 1.0?Mo?6.0 mass %, 2.0?Cr?6.0 mass %, 0.5?Al?1.3 mass %, and Ti?0.1 mass %, with the balance being Fe and unavoidable impurities, and satisfying 1.00?A?1.08, in which A is 0.95+0.35×[C]?0.0092×[Ni]+0.011×[Co]?0.02×[Cr]?0.001×[Mo], where [C] indicates a content (mass %) of C, [Ni] indicates a content (mass %) of Ni, [Co] indicates a content (mass %) of Co, [Cr] indicates a content (mass %) of Cr, and [Mo] indicates a content (mass %) of Mo, respectively. The maraging steel has a tensile strength of 2,300 MPa or more and is also excellent in the toughness/ductility and fatigue characteristics.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 29, 2016
    Assignees: DAIDO STEEL CO., LTD., IHI CORPORATION
    Inventors: Shigeki Ueta, Hiroyuki Takabayashi, Ei Kimura, Yuta Tanaka, Satoshi Takahashi, Isao Nakanowatari, Kota Sasaki, Koshiro Yamane, Satoru Yusa
  • Gas-carburized steel part excellent in surface fatigue strength, steel product for gas carburizing, and manufacturing method of gas-carburized steel part
    Patent number: 9506137
    Abstract: The present invention provides a steel product for gas carburizing used for manufacturing a carburized steel part. In the above steel product for gas carburizing, a composition of a base metal contains, in mass %, C: 0.1 to 0.4%, Si: exceeding 1.2 to 4.0%, Mn: 0.2 to 3.0%, Cr: 0.5 to 5.0%, Al: 0.005 to 0.1%, S: 0.001 to 0.3%, N: 0.003 to 0.03%, and O: limited to 0.0050% or less, and P: limited to 0.025% or less, and when the contents of Si, Mn, and Cr (mass %) are set to [Si %], [Mn %], and [Cr %], Expression (1) below is satisfied, and an alloy shortage layer satisfying Expression (2) below exists in a range from its surface to 2 to 50 ?m in depth. 32?3.5[Si %]+[Mn %]+3[Cr %]>9??(1) 3.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: November 29, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tatsuya Koyama, Manabu Kubota
  • Wear-resistant alloy having complex microstructure
    Patent number: 9493862
    Abstract: A wear-resistant aluminum alloy having a complex microstructure may include a range of about 19 to 27 wt % of zinc (Zn); a range of about 3 to 5 wt % of tin (Sn); a range of about 0.6 to 2.0 wt % of iron (Fe); and a balance of aluminum (Al).
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: November 15, 2016
    Assignee: Hyundai Motor Company
    Inventor: Hee Sam Kang
  • Wear-resistant alloy having complex microstructure
    Patent number: 9493863
    Abstract: A wear-resistant alloy having a complex microstructure, which may include a range of about 28 to 38 wt % of zinc (Zn), a range of about 1 to 3 wt % of tin (Sn), a range of about 0.4 to 1.4 wt of iron (Fe) and a balance of aluminum (Al), is provided.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: November 15, 2016
    Assignee: Hyundai Motor Company
    Inventor: Hee Sam Kang
  • Aluminium alloy forging and method of manufacture for same
    Patent number: 9481920
    Abstract: Disclosed is an aluminum alloy forging for use in automotive suspension parts and the like, and a method of manufacture for same. The aluminum alloy forging contains Si 0.4-1.5 wt %, Fe greater than 0.4 wt % and equal to or less than 1.0 wt %, Cu equal to or less than 0.40 wt %, Mg 0.8-1.3 wt % and Ti 0.01-0.1 wt %; Zn is restricted to equal to or less than 0.05 wt %; and the aluminum alloy forging contains at least one selected from among the following group comprising: Mn 0.01-1.0 wt % and Cr 0.1-0.4%; and Zr 0.05-0.2 wt %. Hydrogen content is restricted to 0.25 ml or less per 100 g of Al, and the remainder is composed of unavoidable impurities and Al. The average grain size is 50 ?m or less, the crystallized area ratio is 3% or less, and the average crystallized grain size is 8 ?m or less.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: November 1, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Masayuki Hori, Yoshiya Inagaki
  • Production of high grade nickel product
    Patent number: 9481919
    Abstract: A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably partially precipitate aluminum and chromium as hydroxides; and c) recovering a high grade nickel product from the PLS preferably by either nickel ion exchange, solvent extraction, electrowinning, conventional multi-stage neutralization, pyrohydrolysis or sulfidation.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: November 1, 2016
    Assignee: CERRO MATOSO SA
    Inventors: Houyuan Liu, Omar Yesid Caceres Hernandez, Renato Antonio Loaiza Aguilar, Carolina Isabel Meneses Rodriguez, Ruben Rangel De Hoyos, Illich Alvarez Mercado
  • Spring steel and surface treatment method for steel material
    Patent number: 9469895
    Abstract: A surface treatment method for a steel material includes carbonitriding, quenching, and tempering. The steel material consists of, by weight %, 0.27 to 0.48% of C, 0.01 to 2.2% of Si, 0.30 to 1.0% of Mn, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The carbonitriding step is performed by heating the steel at a temperature of not less than the A3 point and not more than 1100° C. and bringing the steel into contact with a mixed gas atmosphere so as to concentrate nitrogen and carbon at a surface layer of the steel. The quenching step is performed by cooling the steel to room temperature at a rate of not less than 20° C./second. The tempering step is performed by heating the steel at a temperature of 100 to 400° C.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: October 18, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Takeshi Suzuki, Yoshiki Ono, Shimpei Kurokawa
  • Aluminum alloy for continuous casting and method for producing the same
    Patent number: 9469888
    Abstract: The present disclosure provides an aluminum (Al) alloy for continuous casting, and a method of making the same. The Al alloy includes Al, Si in the range of 14 to 20 wt %, Ti in the range of 2 to 7 wt % and B in the range of 1 to 3 wt %. According to the disclosure, TiB2 compound may be formed in the alloy, where the ratio of Ti:B may range from 2 to 2.5 wt %. By a process of continuously casting the molten metal, an aluminum alloy with improved elasticity may be produced.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: October 18, 2016
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Hoon Mo Park, Hyuk Kang
  • High strength steel sheet having excellent hydrogen embrittlement resistance
    Patent number: 9464337
    Abstract: Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 11, 2016
    Assignees: KABUSHIKI KAISHA KOBE SEIKO SHO, VOESTALPINE STAHL GMBH
    Inventors: Yoichi Mukai, Kouji Kasuya, Michiharu Nakaya, Michitaka Tsunezawa, Fumio Yuse, Junichiro Kinugasa, Sandra Traint, Andreas Pichler
  • Aluminum alloy sheet with excellent paint-bake hardenability
    Patent number: 9453273
    Abstract: This aluminum alloy sheet is a 6000-series aluminum alloy sheet of a specific composition which, after rolling, has undergone solution hardening and reheating as tempering treatments. The aluminum alloy sheet in differential scanning calorimetry gives a curve in which the exothermic-peak heights A, B, and C in respective specific temperature ranges have relationships within specific given ranges to thereby raise the increase in 0.2% proof stress through low-temperature short-time artificial age-hardening to 100 MPa or more.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: September 27, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Katsushi Matsumoto, Yasuhiro Aruga, Hisao Shishido
  • Method for manufacturing an austenitic steel object
    Patent number: 9441281
    Abstract: The invention relates to a method for manufacturing a ductile, high strength austenitic stainless steel object from an austenitic stainless, steel strip, in which method the strip is cold worked in order to promote the formation of martensite into the microstructure of the strip, and the strip having a dual-phase microstructure is further processed. The strip is then shaped to a desired object having at least one curved or arcuate area and during the shaping of the object the different areas of the strip are deformed in different degrees. The desired object is further reversion annealed in order to reverse martensite back to the austenite form and a hardening effect is achieved in order to have an essentially fine grain microstructure for at least the curved or arcuate area of the object.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: September 13, 2016
    Assignee: OUTOKUMPU OYJ
    Inventors: Tero Taulavuori, Antero Kyröläinen, Terho Torvinen
  • Cold-rolled steel sheet and process for production thereof
    Patent number: 9435013
    Abstract: A cold-rolled steel sheet having a refined structure in which grain growth during annealing is suppressed has a chemical composition containing, in mass percent, controlled amounts of carbon, manganese, niobium, titanium, vanadium, sol. Aluminum, chromium, molybdenum, boron, calcium, and REM and a microstructure which contains at least 50% by area of ferrite as a main phase, a second phase containing at least 10% by area of a low temperature transformation phase and 0-3% by area of retained austenite and which satisfies the following Equations (1)-(3), in addition to a particular texture, dm<2.7+10000/(5+300×C+50×Mn+4000×Nb+2000×Ti+400×V)2??(1), dm<4.0??(2), and ds?1.5??(3), wherein dm is the average grain diameter (?m) of ferrite defined by a high angle grain boundary having a tilt angle of at least 15°, and ds is the average grain diameter (?m) of the second phase.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: September 6, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kengo Hata, Toshiro Tomida, Norio Imai
  • High strength aluminum alloys and process for making the same
    Patent number: 9410229
    Abstract: High strength aluminum alloys based on the Al—Zn—Mg—Cu alloy system preferably include high levels of zinc and copper, but modest levels of magnesium, to provide increased tensile strength without sacrificing toughness. Preferred ranges of the elements include by weight, 8.5-10.5% Zn, 1.4-1.85% Mg, 2.25-3.0% Cu and at least one element from the group Zr, V, or Hf not exceeding about 0.5%, the balance substantially aluminum and incidental impurities. In addition, small amounts of scandium (0.05-0.30%) are also preferably employed to prevent recrystallization. During formation of the alloys, homogenization, solution heat treating and artificial aging processes are preferably employed.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: August 9, 2016
    Assignee: Kaiser Aluminum Fabricated Products, LLC
    Inventors: Charles E. Brooks, Ralph C. Dorward, Ray D. Parkinson, Rob A. Matuska, Mory Shaarbaf
  • Steel sheet and method of manufacturing steel sheet
    Patent number: 9410231
    Abstract: A steel sheet, including: as chemical components, by mass %, 0.05% to 0.35% of C; 0.05% to 2.0% of Si; 0.8% to 3.0% of Mn; 0.01% to 2.0% of Al; equal to or less than 0.1% of P; equal to or less than 0.05% of S; equal to or less than 0.01% of N; and the balance including iron and inevitable impurities, wherein the steel sheet comprises 50% or more of a ferrite phase, a bainite phase, and a tempered martensite phase, 3% or more of a retained austenite phase, and 50% or more of the crystal grains of the retained austenite phase satisfy Expression 1, wherein a carbon concentration at a position of center of gravity is Cgc and a carbon concentration at a grain boundary is Cgb.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: August 9, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Riki Okamoto, Natsuko Sugiura, Kohichi Sano, Chisato Wakabayashi, Naoki Yoshinaga, Kaoru Kawasaki
  • Steel for welding
    Patent number: 9403242
    Abstract: A steel for welding includes steel components in which PCTOD is less than or equal to 0.065%, CeqH is less than or equal to 0.225%, FB is greater than or equal to 0.0003%, and Bp is 0.09% to 0.30%. In the steel for welding, in a thickness center portion of a cross-section in a thickness direction, the number of oxide particles having an equivalent circle diameter of 2 ?m or greater is less than or equal to 20 particles/mm2 and the number of Ti oxides having an equivalent circle diameter of 0.05 ?m to 0.5 ?m is 1.0×103 particles/mm2 to 1.0×105 particles/mm2.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 2, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiro Fukunaga, Yoshiyuki Watanabe, Shinsuke Usui, Rikio Chijiiwa
  • Carbon steel wire with high strength and excellent ductility and fatigue resistance, process for producing the same, and method of evaluating the same
    Patent number: 9403200
    Abstract: A carbon steel wire with unprecedentedly high strength and excellent ductility and fatigue resistance, a process for producing the same, and a method of evaluating the same are provided. Provided is a carbon steel wire having a carbon content of 0.50 to 1.10% by mass, wherein the ratio of the hardness of the surface layer portion on a cross section and the hardness of the surface layer portion on a longitudinal section is represented by a coefficient X1, and the ratio of the hardness of the center portion on the cross section and the hardness of the center portion on the longitudinal section is represented by a coefficient X2, wherein X1 and X2 satisfy the following expressions: 0.9<coefficient X1?1.10, and 0.9<coefficient X2?1.10, and wherein the carbon steel wire has a tensile strength of 4000 MPa or higher.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: August 2, 2016
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Wataru Shimizu
  • Clayish composition for forming sintered silver alloy body, powder for clayish composition for forming sintered silver alloy body, method for manufacturing clayish composition for forming sintered silver alloy body, sintered silver alloy body, and method for manufacturing sintered silver alloy body
    Patent number: 9399254
    Abstract: A clayish composition for forming a sintered silver alloy body capable of forming a sintered silver alloy body, which is not easily discolored even in the atmosphere and has excellent tensile strength, flexural strength, surface hardness (hereinafter, sometimes collectively referred to as ‘mechanical strength’), elongation or the like, powder for the clayish composition for forming a sintered silver alloy body, a method for manufacturing the clayish composition for forming a sintered silver alloy body, a sintered silver alloy body and a method for manufacturing the sintered silver alloy body.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: July 26, 2016
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Takashi Yamaji, Yasuo Ido, Shinji Otani
  • Aluminum alloy sheet excellent in baking finish hardenability
    Patent number: 9399808
    Abstract: This aluminum alloy sheet has increased BH properties under low-temperature short-time-period conditions after long-term room-temperature aging by means of causing aggregates of specific atoms to be contained having a large effect in BH properties, the distance between atoms being no greater than a set distance, and containing either Mg atoms or Si atoms measured by 3D atom probe field ion microscopy in a 6000 aluminum alloy sheet containing a specific amount of Mg and Si.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: July 26, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Katsushi Matsumoto, Yasuhiro Aruga, Hidemasa Tsuneishi
  • Method for production of trichlorosilane and silicon for use in the production of trichlorosilane
    Patent number: 9388051
    Abstract: The present invention relates to a method for the production of trichlorosilane by reaction of silicon with HCI gas at a temperature between 250° and 1100° C., and an absolute pressure of 0.5-30 atm in a fluidized bed reactor, in a stirred bed reactor or a solid bed reactor, where the silicon supplied to the reactor contains between 40 and 10.000 ppm by weight barium and optionally 40-10000 ppm by weight copper The invention further relates to silicon for use in the production of trichlorosilane by reaction of silicon with HCI gas, containing between 40 and 10.000 ppm by weight barium and optionally 40-10000 ppm by weight copper, the remaining except for normal impurities being silicon.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: July 12, 2016
    Assignee: ELKEM AS
    Inventors: Jan-Otto Hoel, Henning Kjenli, Harry Morten Rong, Torbjorn Roe, Jostein Bjordal
  • Turbocharger and compressor wheel therefor
    Patent number: 9366181
    Abstract: The invention relates to a compressor wheel for a turbocharger, in particular in combination with a diesel engine, and to an exhaust gas turbocharger comprising such a compressor wheel.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: June 14, 2016
    Assignee: BorgWarner Inc.
    Inventors: Gerald Schall, Melanie Gabel