Patents Examined by Deborah Yee
  • Patent number: 10060015
    Abstract: To provide a steel for high-strength bolts, which can exhibit the sufficient delayed fracture resistance under the severe environment, and also has excellent bolt formability. The steel for high-strength bolts of the present invention includes C: 0.10 to 0.30%; and Ni: 0.4 to 0.7%, with the chemical composition being appropriately adjust, and satisfies the following formulas (1) and (2): 0.85?[C]+[Si]/7+[Mn]/5+[Ni]/20+[Cr]/9+[Mo]/2?1.3??(1) [C]?(0.07×[Mo]+0.20×[V])?0.20??(2).
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: August 28, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Yosuke Matsumoto, Atsushi Inada, Masamichi Chiba, Yoshimasa Ureshino, Reiko Kato
  • Patent number: 10060006
    Abstract: This high-strength cold-rolled steel sheet contains, in mass %, C: 0.02% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001% to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; in which Si+Al is limited to less than 1.0%, and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of ? to ? in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100}<011> to {223}<110> orientation group is 4.0 or less, and a pole density of the {332}<113> crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 7 ?m or less.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: August 28, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yoshihiro Suwa, Kazuaki Nakano, Kunio Hayashi, Riki Okamoto, Nobuhiro Fujita, Kohichi Sano
  • Patent number: 10060013
    Abstract: There is provided a steel, having an excellent rolling fatigue life, wherein an oxygen content in the steel is 8 ppm or less, a sulfur content is 0.008 mass % or less, and an Al content is 0.005 to 0.030 mass %, the number of non-metallic inclusions having an inclusion diameter of 20 ?m or more and less than 100 ?m, detected per steel material volume of 1000 mm3 by ultrasonic flaw detection, is 12.0 or less, the number of non-metallic inclusions having an inclusion diameter of 100 ?m or more, detected per steel material weight of 2.5 kg by the ultrasonic flaw detection, is 2.0 or less, the mass % ratio of (MgO)/(Al2O3) in the average composition of MgO—Al2O3-based oxides present in the steel is regulated into a range of 0.25 to 1.50, and the number ratio of the MgO—Al2O3-based oxides to all oxide-based inclusions is 70% or more.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: August 28, 2018
    Assignee: Sanyo Special Steel Co., Ltd.
    Inventors: Takeshi Fujimatsu, Norimasa Tsunekage, Ichiro Takasu
  • Patent number: 10053752
    Abstract: A steel component having a steel substrate containing 0.3-3 wt.-% manganese, and an anti-corrosion coating applied to the steel substrate including a coating layer having at least 70 mass-% ?-Fe(Zn,Ni) mixed crystal, the remainder being intermetallic compounds of Zn, Ni and Fe, and which has at its free surface a Mn-containing layer in which the Mn is present in metallic or oxidic form.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: August 21, 2018
    Assignee: ThyssenKrupp Steel Europe AG
    Inventors: Patrick Kuhn, Manfred Meurer, Jens Kondratiuk, Wilhelm Warnecke, Werner Schüler
  • Patent number: 10047433
    Abstract: Provided is a tungsten sintered compact sputtering target, wherein the purity of the tungsten is 5N (99.999%) or more, and the content of impurity carbon in the tungsten is 5 wtppm or less. An object of the present invention is to decrease the specific resistance of a tungsten film sputter-deposited by using a tungsten sintered compact sputtering target by reducing a carbon content in the tungsten target.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: August 14, 2018
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Kazumasa Ohashi, Takeo Okabe
  • Patent number: 10046383
    Abstract: A method for manufacturing Cu—Sn coexisting steel produces a good quality surface even after hot rolling. The steel is manufactured by continuous casting a molten steel that contains C: 0.04 to 0.20%, Si: 0.05 to 1.00%, Mn: 0.20 to 2.50%, P: no more than 0.05%, S: no more than 0.02%, Cu: 0.20 to 1.50%, Sn: 0.06 to 0.50%, Al: 0.06 to 1.00% and Ni: 0.05 to 1.00% by mass, and Fe and impurities as the remainder. The composition of the molten steel is defined as [Al]/(3[Si]+[Mn])?0.050, [Ni]/([Cu]+5[Sn])?0.10 and [Al]/[Ni]?0.20 if the content of an element X in the molten steel is represented as [X], an internal oxidation layer is formed in a process of cooling a slab, and Al2O3 is contained by the internal oxidation layer.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: August 14, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Naotsugu Yoshida, Hirofumi Nakamura, Takayuki Kamimura, Nobuo Otsuka
  • Patent number: 10047425
    Abstract: A method of age hardening a 7xxx series aluminum alloy is provided that includes heat treating the alloy at a first temperature for a first exposure time and heat treating the alloy at a second temperature that is higher than the first temperature for a second exposure time. The age hardening process may be used to form an alloy having a yield strength of at least 490 MPa and the total age hardening time may be 8 hours or less. In one example, the first heat treatment is performed at 100° C. to 150° C. for 0.2 to 3 hours and the second heat treatment is be performed at 150° C. to 185° C. for 0.5 to 5 hours.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: August 14, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Nia R. Harrison, S. George Luckey, Jr.
  • Patent number: 10040147
    Abstract: A braze alloy includes by atom %, about 30% to about 60% iron, 0 to about 40% nickel, and about 10% to about 20% in total of melting point depressants selected from the group consisting of phosphorous, carbon, boron, and silicon.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: August 7, 2018
    Assignee: Case Western Reserve University
    Inventors: DongMyoung Lee, Gerhard E. Welsch
  • Patent number: 10041160
    Abstract: Provided is high strength steel for springs that, compared to conventional high strength steel for springs, has excellent decarburization resistance and scale exfoliation property, by optimization of the added amounts of C, Si, Mn, and Cr as well as of Sb and Sn. The steel for springs contains C: more than 0.45 mass % and less than 0.65 mass %, Si: 0.15 mass % or more and 0.70 mass % or less, Mn: 0.10 mass % or more and 1.00 mass % or less, Cr: 0.20 mass % or more and 1.50 mass % or less, P: 0.025 mass % or less, S: 0.025 mass % or less, O: 0.0015 mass % or less, Sb: 0.010 mass % or more and less than 0.030 mass %, and Sn: 0.010 mass % or more and 0.030 mass % or less, under predetermined conditions.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: August 7, 2018
    Assignees: JFE STEEL CORPORATION, SUMIHATSU CO., LTD., NHK SPRING CO., LTD.
    Inventors: Minoru Honjo, Kiyoshi Uwai, Shigeru Endo, Katsutoshi Yamashita, Koei Tsuru, Keiichi Fujie, Akira Tange
  • Patent number: 10041157
    Abstract: A low-alloyed steel, comprising about 0.3 to about 0.50 wt. % carbon, about 2.0 to about 5.0 wt. % silicon, and a remainder of iron, optionally containing low amounts of molybdenum, titanium and/or boron, with up to about 0.5 wt. % impurities. The low-alloyed steel is useful for making structural components having a tensile strength of greater than about 1000 to about 2000 MPa, a yield strength of greater than about 700 to approximately 950 MPa; a break elongation of greater than about 17% and a scaling resistance of greater than about 650° C.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: August 7, 2018
    Assignee: Gesenkschmiede Schneider GmbH
    Inventors: Peter Kolbe, Ernst-Peter Schmitz, Thomas Körner, Ottmar Schwarz
  • Patent number: 10041140
    Abstract: Disclosed is a method for continuous thermal treatment of a steel strip. The strip passes through consecutive thermal treatment chambers, is quickly cooled in at least one of the chambers by spraying liquid onto the strip, or by spraying a fluid made up of gas and liquid or spraying a combination of gas and liquid forming a mist. After quick cooling, a protective metal layer is deposited on the strip by dip coating. The cooling fluid strips iron oxides or other alloy elements contained in the steel to be treated, minimizing oxidation and reducing the oxides on the strip. Spray pressure and distance are chosen to facilitate the stripping property and the mechanical action of the sprayed fluid, reducing the layer of oxides on the strip. The temperature of the strip at the end of the cooling step is the temperature necessary for carrying out the desired treatment cycle.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: August 7, 2018
    Assignee: FIVES STEIN
    Inventor: Alain Genaud
  • Patent number: 10036078
    Abstract: Low-alloy oil-well steel pipe includes a composition consisting, in mass %, of C: 0.40 to 0.65%, Si: 0.05 to 0.50%, Mn: 0.10 to 1.00%, P: 0.020% or less, S: 0.0020% or less, Cu: 0.15% or less, Cr: 0.40 to 1.50%, Mo: 0.50 to 2.50%, V: 0.05 to 0.25%, Ti: 0 to less than 0.01%, Nb: 0.01 to 0.2%, sol. Al: 0.010 to 0.100%, N: 0.006% or less, B: 0 to 0.0015%, and Ca: 0 to 0.003%, the balance being Fe and impurities. The structure has tempered martensite and 0 to less than 2% volume ratio of retained austenite. A grain size number of prior-austenite grain in the structure is 9.0 or more. An equivalent circular diameter of a sub-structure surrounded by a boundary having a crystal orientation difference of 15° or more from a packet boundary, a block boundary and a lath boundary is 3 ?m or less for the tempered martensite.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: July 31, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yuji Arai, Tomohiko Omura, Keiichi Kondo
  • Patent number: 10030283
    Abstract: Provided is a method for producing a surface-treated steel sheet for battery containers including: a first process of forming an iron-nickel alloy plating layer on at least one side of a steel sheet; a second process of forming a nickel plating layer on the iron-nickel alloy plating layer; and a third process of performing a thermal treatment after forming the nickel plating layer to form an iron-nickel alloy layer having an outermost surface, at which a content ratio of Fe atoms is 12 to 55% by atom, on an outermost layer by thermal diffusion. The invention makes it possible to provide the method for producing the surface-treated steel sheet for battery containers that can suppress the elution of iron inside the battery when being used for a battery container, whereby the service life of the battery can be extended and battery characteristics such as discharge characteristics can be improved.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: July 24, 2018
    Assignee: TOYO KOHAN CO., LTD.
    Inventors: Shinichirou Horie, Koh Yoshioka, Kazuhiko Ishihara
  • Patent number: 10026533
    Abstract: According to the present invention, a grain-oriented electrical steel sheet for iron cores exhibiting excellent transformer iron loss properties in an excitation range from 1.5 T to 1.9 T is provided, in which a residual stress of 150 MPa or more is formed near strain regions, each extending 300 ?m or less in the rolling direction and 42 ?m or more in the sheet thickness direction, and the strain regions are formed periodically at intervals of 2 mm to 10 mm in the rolling direction, with reduced energy loss in transformers in operation.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: July 17, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Shigehiro Takajo, Hiroi Yamaguchi, Seiji Okabe, Kazuhiro Hanazawa
  • Patent number: 10017833
    Abstract: Disclosed herein is a method and tool for hardening a hollow profile of a steel workpiece having an interior space. The method includes the steps of providing a workpiece having a hollow profile, heating the hollow profile, placing the hollow profile of the steel workpiece in a hardening tool, and cooling the hollow profile from the inside by way of a cooling core having an exterior shape that is complimentary to that of the structural shape of the interior space of the hollow profile.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: July 10, 2018
    Assignees: THYSSENKRUPP STEEL EUROPE AG, THYSSENKRUPP AG
    Inventors: Thomas Flehmig, Martin Kibben, Jörg Gorschlüter
  • Patent number: 10011888
    Abstract: A cold-rolled steel sheet for vitreous enameling has a predetermined chemical composition, in which a number density of Fe—Mn—Nb-based composite oxides having a diameter of 0.2 ?m to 10 ?m is 2×102 particle/mm2 to 1×104 particle/mm2; a fatigue limit ratio is higher than 0.42 after performing a heat treatment with an applied tensile strain of 10% at a heating temperature of 830° C. for a holding time of 5 minutes; voids are formed between the metallographic structure and the Fe—Mn—Nb-based composite oxides, and an equivalent circle diameter of the voids is 0.1 ?m to 0.6 ?m; and when each of the voids is approximated as a triangle and a long side of the triangle is set as a base, a value obtained by dividing a length of the base by a height of the triangle is 1.0 to 15.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: July 3, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshimasa Tomokiyo, Shintaro Yamanaka, Kengo Takeda, Satoshi Nishimura
  • Patent number: 10000838
    Abstract: Titanium alloys formed into a part or component used in applications where a key design criterion is the energy absorbed during deformation of the part when exposed to impact, explosive blast, and/or other forms of shock loading is described. The titanium alloys generally comprise a titanium base with added amounts of aluminum, an isomorphous beta stabilizing element such as vanadium, a eutectoid beta stabilizing element such as silicon and iron, and incidental impurities. The titanium alloys exhibit up to 70% or more improvement in ductility and up to a 16% improvement in ballistic impact resistance over a Ti-6Al-4V alloy, as well as absorbing up to 50% more energy than the Ti-6Al-4V alloy in Charpy impact tests. A method of forming a part that incorporates the titanium alloys and uses a combination of recycled materials and new materials is also described.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: June 19, 2018
    Assignee: Titanium Metals Corporation
    Inventors: Roger Thomas, Yoji Kosaka, Steven James, Paul Garratt
  • Patent number: 10000830
    Abstract: The present invention is to provide a method for manufacturing a martensite-based precipitation strengthening stainless steel, which effectively enables crystal grains to become finer by improving a solution treatment method. The method for manufacturing a martensite-based precipitation strengthening stainless steel containing 0.01 to 0.05 mass % of C, 0.2 mass % or less of Si, 0.4 mass % or less of Mn, 7.5 to 11.0 mass % of Ni, 10.5 to 14.5 mass % of Cr, 1.75 to 2.50 mass % of Mo, 0.9 to 2.0 mass % of Al, less than 0.2 mass % of Ti, and Fe and impurities as a remainder, which is provided by the present invention, includes performing a solid solution treatment at 845 to 895° C. once or more.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: June 19, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Ryutaro Abe, Tomonori Ueno, Eiji Shimohira, Gang Han
  • Patent number: 10003237
    Abstract: A solid steel flywheel rotor having improved material properties offers improved energy storage at reduced cost. A process for manufacturing the rotor is also provided.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: June 19, 2018
    Assignee: Amber Kinetics, Inc.
    Inventors: Seth Sanders, Eric Sun, Mike He, Matthew Senesky, Edward Chiao
  • Patent number: 9994925
    Abstract: Provided is a cold work tool material capable of reducing dimensional changes which occur, due to heat treatment, in the longitudinal direction of the material during quenching and tempering. This cold work tool material is drawn through hot working, has an annealed structure including carbides, and is used after being quenched and tempered, wherein, in the annealed structure which is formed in a cross section parallel to a drawing direction due to the hot working of the cold work tool material, the standard deviation in the degree of orientation of carbides Oc, as determined by equation (1) below, is 6.0 or more for carbides having a circle equivalent diameter of 5.0 ?m or greater as observed in the annealed structure in the cross section at right angle to a direction perpendicular to the drawing direction. Oc=D×? . . .
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: June 12, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Tatsuya Shouji, Yukio Shinji, Katsufumi Kuroda