Nickel Containing Patents (Class 420/38)
  • Patent number: 11408691
    Abstract: The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R134a as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: August 9, 2022
    Assignee: LG ELECTRONICS INC.
    Inventor: Seokpyo Hong
  • Patent number: 11332811
    Abstract: A metal powder for powder metallurgy contains Fe as a principal component, Cr in a proportion of 11.0 mass % or more and 25.0 mass % or less, Ni in a proportion of 8.0 mass % or more and 30.0 mass % or less, Si in a proportion of 0.20 mass % or more and 1.2 mass % or less, C in a proportion of 0.070 mass % or more and 0.40 mass % or less, Mn in a proportion of 0.10 mass % or more and 2.0 mass % or less, P in a proportion of 0.10 mass % or more and 0.50 mass % or less, and at least one of W and Nb in a proportion of 0.20 mass % or more and 3.0 mass % or less in total.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: May 17, 2022
    Inventors: Hidefumi Nakamura, Ryo Numasawa
  • Patent number: 11242578
    Abstract: This ferritic stainless steel sheet contains, by mass %: C: 0.001% to 0.020%; Si: 0.01% to 4.00%; Mn: 0.01% to 3.00%; P: 0.010% to 0.040%; S: 0.0001% to 0.0100%; Cr: 10.0% to 15.0%; N: 0.001% to 0.020%; Al: 0.50% to 10.0%; and either one or both of Ti: 0.05% to 0.40% and Nb: 0.05% to 0.40%, with the balance being Fe and unavoidable impurities, in which Cr/(Si+Al) is 10.0 or less, and a specific gravity is 7.6 g/cm3 or less.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: February 8, 2022
    Assignee: NIPPON STEEL STAINLESS STEEL CORPORATION
    Inventors: Junichi Hamada, Masatoshi Abe, Atsutaka Hayashi
  • Patent number: 11235415
    Abstract: In a fillet welded joint a base material tensile strength is 980 MPa or more, a carbon equivalent is 0.36 or more and 0.60 or less, a tensile strength [MPa] is 1950 times or more of the carbon equivalent [wt %], a weld metal average carbon equivalent is 0.45 or more and 0.65 or less, and at a prescribed position below a surface of a weld toe, a Vickers hardness HVbond at a boundary between the weld metal and a heat affected zone, an average value HVwmt of the Vickers hardness of the weld metal in a position 0.1-mm or more and 0.3-mm or less to the weld metal side of the boundary, and an average value HVhaz of the Vickers hardness of the heat affected zone in a position 0.1-mm or more and 0.3-mm or less to the heat affected zone side of the boundary satisfy HVbond?HVwmt, HVbond?HVhaz-50, and HVhaz?350.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: February 1, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shinji Kodama, Kazuki Matsuda, Yoshinari Ishida
  • Patent number: 11149327
    Abstract: A method and a device for heating a sheet metal blank or a formed sheet metal component above the austenitization temperature for the purpose of quench hardening, wherein the dew point of the furnace atmosphere is set to ?15° C. to 15° C., preferably to ?10° C. to 10° C., in particular for the formation of a loosely adhering oxide skin, for controlling an oxide skin on the sheet metal or component coated with a metallic corrosion protection layer or an uncoated sheet metal or component.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: October 19, 2021
    Assignees: voestalpine Automotive Components Cartersville Inc., Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Wilhelm Weinmeister, Markus Pfestorf
  • Patent number: 11142814
    Abstract: Provided is a ferritic-austenitic duplex stainless steel sheet in which no blowholes are formed during welding and which has excellent strength. A chemical composition includes, in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0 to 7.0%, P: 0.07% or less, S: 0.030% or less, Cr: 18.0 to 24.0%, Ni: 0.1 to 3.0%, Mo: 0.01 to 1.0%, Cu: 0.1 to 3.0%, Al: 0.003 to 0.10%, Zr: 0.01 to 0.50%, and N: 0.15 to 0.30%, with the balance being Fe and incidental impurities, the chemical composition satisfying formula (1) below and formula (2) below. N—Zr/6.5?0.15%??(1) N—Zr/6.5?0.23%??(2) Here, in formula (1) and formula (2), N represents a content (mass %) of the corresponding chemical element N and Zr represents a content (mass %) of the corresponding chemical element Zr.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: October 12, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Akito Mizutani, Mitsuyuki Fujisawa
  • Patent number: 11090755
    Abstract: The present invention provides a welding material for ferritic heat-resistant steel, a welded joint for ferritic heat-resistant steel, and a method for producing the welded joint for to form a weld metal having a high creep strength and a high toughness in welding a ferritic heat-resistant steel that contains B. The welding material for ferritic heat-resistant steel has a chemical composition containing, in mass %, C: 0.06 to 0.10%, Si: 0.1 to 0.4%, Mn: 0.3 to 0.7%, Co: 2.6 to 3.4%, Ni: 0.01 to 1.10%, Cr: 8.5 to 9.5%, W: 2.5 to 3.5%, Nb: 0.02 to 0.08%, V: 0.1 to 0.3%, Ta: 0.02 to 0.08%, B: 0.007 to 0.015%, N: 0.005 to 0.020%, with the balance being Fe and impurities, and satisfying Formula (1): 0.5?Cr+6Si+1.5W+11V+5Nb+10B?40C?30N?4Ni?2Co?2Mn?10.0??(1).
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 17, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Hirata, Kana Jotoku, Tomoaki Hamaguchi, Toshihide Ono, Katsuki Tanaka
  • Patent number: 11014155
    Abstract: A gear includes a sintered body, in which Fe is contained as a principal component, Ni is contained in a proportion of 2 mass % or more and 20 mass % or less, Si is contained in a proportion of 0.3 mass % or more and 5.0 mass % or less, C is contained in a proportion of 0.005 mass % or more and 0.3 mass % or less, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, that is contained in a proportion of 0.01 mass % or more and 0.7 mass % or less.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: May 25, 2021
    Inventor: Hidefumi Nakamura
  • Patent number: 10995888
    Abstract: A Ti-containing ferritic stainless steel sheet for an exhaust pipe flange member has a composition containing, in mass percentage, from 0.003 to 0.030% of C, 2.0% or less of S i, 2.0% or less of Mn, 0.050% or less of P, 0.040% or less of S, from 10.0 to 19.0% of Cr, 0.030% or less of N, from 0.07 to 0.50% of Ti, from 0.010 to 0.20% of Al, from 0 to 1.50% of Mo, and from 0 to 0.0030% of B, with the balance Fe and unavoidable impurities, has a K value of 150 or more, has a sheet surface hardness of 170 HV or less, and has a sheet thickness of from 5.0 to 11.0 mm. The K value equals ?0.07×Cr?6790×Free(C+N)?1.44×d+267, wherein Free(C+N) corresponds to the solid-dissolved (C+N) concentration (% by mass), and d represents an average crystal grain diameter (?m).
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: May 4, 2021
    Assignee: NIPPON STEEL STAINLESS STEEL CORPORATION
    Inventors: Seiji Mitsunaga, Nobuhisa Ebihama, Yasuhiro Ehara, Kazunari Imakawa
  • Patent number: 10927438
    Abstract: Provided is an Fe—Ni—Cr alloy that has excellent surface characteristics and enables formation of a blackened coating having excellent blackening characteristics and peeling resistance. The Fe—Ni—Cr alloy has a chemical composition containing, by mass %, C, Si, Mn, P, S, Cr, Ni, Mo, Co, Cu, N, Ti, Al, O, and H, the balance being Fe and inevitable impurities, and satisfying formulae (1) to (4): (1) T1=11×[% N]+0.1; (2) T2=?39×[% N]?1.0; (3) A1=7.5×[% N]+0.1; (4) A2=?42.5×[% N]+1.0, where [% M] represents content (mass %) of element M in the alloy, and T1, T2, A1, and A2 satisfy relationships T1<[% Ti]<T2 and A1<[% A1]<A2.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: February 23, 2021
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuhiro Yamakawa, Shigeru Hirata, Kun Wang, Hidekazu Todoroki
  • Patent number: 10822679
    Abstract: Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al2O3 inclusions constitute an area fraction of 0.02% or less. This stainless steel product has excellent corrosion resistance to hot concentrated sulfuric acid of approximately 93 to 99% concentration, for example, and also is economically advantageous.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 3, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hideya Kaminaka, Shinya Yamamoto, Hiroshi Kamio, Kouichi Takeuchi
  • Patent number: 10793930
    Abstract: A steel material contains, in mass %, C: 0.005 to 0.050, N: 0.05 to 0.30, Si: 0.1 to 1.5, Mn: 0.1 to 7.0, P: 0.005 to 0.100, S: 0.0001 to 0.0200, Cr: 18.0 to 28.0, Cu: 0.1 to 3.0, Ni: 0.1 to 8.0, Mo: 0.1 to 5.0, Al: 0.001 to 0.050, B: 0.0001 to 0.0200, and Ca: 0.0001 to 0.0100. An area ratio of an austenitic phase ranges from 30% to 70% and formulae (I) and (II) below are satisfied. 1.03?[% Cr*F]/[% Cr]?1.40??Formula (I) 1.05?[% Mn*A]/[% Mn]?1.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: October 6, 2020
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Atsutaka Hayashi, Nobuhiko Hiraide, Junichi Hamada
  • Patent number: 10773302
    Abstract: A metal powder for powder metallurgy contains Fe as a principal component, Ni in a proportion of 5 mass % or more and 20 mass % or less, Si in a proportion of 0.3 mass % or more and 5 mass % or less, and C in a proportion of 0.005 mass % or more and 0.3 mass % or less, and when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group and having a higher group number in the periodic table than that of the first element or having the same group number in the periodic table as that of the first element and a higher period number in the periodic table than that of the first element is defined as a second element.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: September 15, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Hidefumi Nakamura
  • Patent number: 10513757
    Abstract: Provided is a corrosion-resistant, high-hardness alloy composition, which realizes both corrosion resistance and high hardness by using a Ni—Co—Cr—Mo-based alloy and optimizing the chemical composition, heat treatment conditions and processing conditions thereof, and a method for producing that alloy composition. The alloy composition is an alloy composition comprising 15.5% by weight to 16.5% by weight of Cr, 7.5% by weight to 15.5% by weight of Mo, 0% by weight to 30% by weight of Co, 4.5% by weight to 15% by weight of Fe and 0.5% by weight to 4.0% by weight of Cu, with the remainder consisting of Ni and unavoidably included elements, wherein the crystal phase consists only of a 7 phase and the Vickers hardness at room temperature is 500 HV or more. The alloy composition is obtained by subjecting an ingot of an alloy having the aforementioned composition to homogenization treatment for 4 hours to 24 hours at 1100° C. to 1300° C.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: December 24, 2019
    Assignees: TOHOKU UNIVERSITY, KABUSHIKA KAISHA EIWA
    Inventors: Yunping Li, Akihiko Chiba
  • Patent number: 10487429
    Abstract: The tool (10) for textiles according to the invention consists of chromium steel, into which carbon has been embedded in locally varying amounts during a carbonizing process. Thermal treatment achieves a formation of martensite with the maximum achievable hardness, in particular in those zones in which larger carbon fractions have been introduced. A tool for textiles with zones of differing hardnesses can thus be produced without having to subject the individual zones with differing hardnesses to different process conditions during the production process. The hardness is controlled on the basis of the degree of deformation of the tool for textiles.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: November 26, 2019
    Assignee: Groz-Beckert KG
    Inventors: Simone Schwarz, Frank-Martin Durst, Richard Zeller
  • Patent number: 10480053
    Abstract: The present invention relates to an austenitic light-weight high-strength steel with excellent properties of welds, and a method of manufacturing the same, the method including: (a) hot-rolling a steel including 20 wt % to 30 wt % of manganese (Mn), 6 wt % to 12 wt % of aluminum (Al), 0.6 wt % to 1.5 wt % of carbon (C), 0.3 wt % to 0.95 wt % of vanadium (V), and a remaining amount of iron (Fe) and other unavoidable impurities; (b) homogenizing the hot-rolled steel; and (c) aging the homogenized steel.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: November 19, 2019
    Assignee: KOREA INSTITUTE OF MACHINERY AND MATERIALS
    Inventors: Joon-Oh Moon, Seong-Jun Park, Chang-Hoon Lee
  • Patent number: 10458007
    Abstract: A quench and temper steel alloy is disclosed having the following composition in weight percent. C 0.2-0.5 Mn 0.1-1.0 Si 0.1-1.2 Cr ??9-14.5 Ni 2.0-5.5 Mo 1-2 Cu ??0-1.0 Co 1-4 W 0.2 max. V 0.1-1.0 Ti up to 0.5 Nb ??0-0.5 Ta ??0-0.5 Al ??0-0.25 Ce ??0-0.01 La ??0-0.01 The balance of the alloy is iron and the usual impurities including not more than about 0.01% phosphorus, not more than about 0.010% sulful, and not more than about 0.10% nitrogen. A quenched and tempered steel article made from this alloy is also disclosed. The steel article is characterized by a tensile strength of at least about 290 ksi, a fracture toughness (kIc) of at least about 65 ksi, good resistance to general corrosion, and good resistance to pitting corrosion.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: October 29, 2019
    Assignee: CRS HOLDINGS, INC.
    Inventor: David E. Wert
  • Patent number: 10450624
    Abstract: Methods for producing a flat product from an iron-based shape memory alloy may involve casting a melt comprised of iron, alloying elements, and impurities into a strip having a thickness of 1-30 mm and cooling the melt as the strip is formed. A twin-roll caster may be employed to help cool and form the melt into the strip. The resultant flat product is highly resistant to bending and is robust under pressure and torsion.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: October 22, 2019
    Assignee: THYSSENKRUPP STEEL EUROPE AG
    Inventors: Rainer Fechte-Heinen, Christian Höckling, Lothar Patberg, Jens-Ulrik Becker
  • Patent number: 10400317
    Abstract: Fe—Cr—Ni—Mo alloy having superior surface properties and a method for producing the same using a commonly used apparatus at low cost. The Fe—Cr—Ni—Mo alloy has (% indicates mass %): C: ?0.03%, Si: 0.15 to 0.5%, Mn: 0.1 to 1%, P: ?0.03%, S: ?0.002%, Ni: 20 to 32%, Cr: 20 to 26%, Mo: 0.5 to 2.5%, Al: 0.1 to 0.5%, Ti: 0.1 to 0.5%, Mg: 0.0002 to 0.01%, Ca: 0.0002 to 0.01%, N: ?0.02%, O: 0.0001 to 0.01%, freely contained components of Co: 0.05 to 2% and Cu: 0.01 to 0.5%, Fe as a remainder, and inevitable impurities, wherein MgO, MgO.Al2O3 spinel type, and CaO—Al2O3—MgO type are contained as oxide type non-metallic inclusions, ratio of number of MgO.Al2O3 spinel type to all oxide type non-metallic inclusions is ?50%, and CaO—Al2O3—MgO type contains CaO: 30 to 70%, Al2O3: 5 to 60%, MgO: 1 to 30%, SiO2: ?8%, and TiO2: ?10%.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: September 3, 2019
    Assignee: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Hidekazu Todoroki, Fumiaki Kirihara
  • Patent number: 10403899
    Abstract: Provided is an alloy comprising eight or more types of constituent elements, wherein the relative difference in terms of distance between nearest neighbors DNN between a constituent element having the largest distance between nearest neighbors DNN when constituting a bulk crystal from a single element and a constituent element having the smallest distance between nearest neighbors DNN when constituting a bulk crystal from a single element is 9% or less, the number of constituent elements having the same crystal structure when constituting a bulk crystal from a single element is not more than 3, and the difference in concentration between the constituent element having the highest concentration and the constituent element having the lowest concentration is 2 at. % or lower.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: September 3, 2019
    Assignee: Hitachi, Ltd.
    Inventor: Tomio Iwasaki
  • Patent number: 9771628
    Abstract: Provided is a duplex stainless steel having a high strength and a high toughness. A stainless steel according to the present invention includes: a chemical composition containing, in mass percent, C: at most 0.030%, Si: 0.20 to 1.00%, Mn: at most 8.00%, P: at most 0.040%, S: at most 0.0100%, Cu: more than 2.00% and at most 4.00%, Ni: 4.00 to 8.00%, Cr: 20.0 to 30.0%, Mo: at least 0.50% and less than 2.00%, N: 0.100 to 0.350%, and sol. Al: at most 0.040%, the balance being Fe and impurities; and a structure, wherein a rate of ferrite in the structure is 30 to 70%, and a hardness of the ferrite in the structure is at least 300 Hv10gf.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: September 26, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Daisuke Motoya, Masahiko Hamada, Hisashi Amaya, Hiroyuki Nagayama, Kenta Yamada
  • Patent number: 9745650
    Abstract: Provided is austenite heat-resisting cast steel with reduced precipitation of ferrite phase during the application of thermal load to stabilize the austenite structure for improved heat resistance. The austenite heat-resisting cast steel contains elements of 0.1 to 0.6 mass % of C, 1.0 to 2.5 mass % of Si, 1.0 to 3.5 mass % of Mn, 0.05 to 0.2 mass % of S, 14 to 24 mass % of Cr, 5 to 20 mass % of Ni, 0.1 to 0.3 mass % of N, 0.01 to 1.2 mass % of Zr, 0.01 to 1.5 mass % of Cu, 0.01 to 1.5 mass % of Nb, Fe as a remainder and unavoidable impurity. The elements satisfy the following expressions: Mn—S?1.0; and C?(1/12Cr?32Zr)>0, where symbols for elements in these expressions represent values indicating content of the elements corresponding to the symbols in a unit of atomic %.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: August 29, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Takamichi Ueda, Harumi Ueno, Takashi Maeshima, Hirofumi Ito, Kazuaki Nishino, Hideaki Ikehata
  • Patent number: 9663850
    Abstract: The present invention relates to high-nitrogen duplex stainless steels with an excellent eco-index and pitting corrosion resistance, in particular, to providing duplex stainless steels with ferrite-austenite phases, including: 16.5-19.5 wt. % of chromium (Cr), 2.3-3.5 wt. % of molybdenum (Mo), 1.0-5.5 wt. % of tungsten (W), 5.5-7.0 wt. % of manganese (Mn), 0.35-0.45 wt. % of nitrogen (N), with a remainder of iron (Fe). The high nitrogen duplex stainless steels with excellent eco-index and pitting corrosion resistance according to the present invention use manganese (Mn) and nitrogen (N) to exclude or mostly substitute Ni, which increases price instability of the steel grades and environment burden, to result in enhancing economic efficiency, price stability and eco-friendliness.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: May 30, 2017
    Assignee: Korea Institute of Machinery and Materials
    Inventors: Heon Young Ha, Tae-Ho Lee, Byoung Chul Hwang
  • Patent number: 9499889
    Abstract: Disclosed is an ferritic stainless steel alloy that includes, by weight, about 20% to about 22% chromium, about 0% to about 0.5% nickel, about 0.5% to about 1.0% manganese, about 1.0% to about 2.5% silicon, about 1.5% to about 2.2% tungsten, about 1.3% to about 1.8% niobium, about 0.35% to about 0.45% carbon, and a balance of iron. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 1050° C.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: November 22, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Pavan Chintalapati, Marc Wilson, Rayad Benchiheub, Ted Pozniak
  • Patent number: 9296958
    Abstract: A process and apparatus are disclosed for treating a hydrocarbon stream, the process including flowing the hydrocarbon stream through a hydrocarbon treating vessel, heating a portion of the hydrocarbon treating vessel to a predetermined temperature and for a predetermined amount of time and controlling sensitization and chloride stress corrosion cracking of the portion of the interior surface of the hydrocarbon treating vessel.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: March 29, 2016
    Assignee: UOP LLC
    Inventors: Shixue Wen, Mark W. Mucek, Steven A. Bradley, Benjamin L. Tiemens, Donald A. Eizenga
  • Patent number: 9272256
    Abstract: A process is disclosed for treating a hydrocarbon stream including flowing the hydrocarbon stream through a hydrocarbon treating vessel, heating a portion of the hydrocarbon treating vessel to a predetermined temperature and for a predetermined amount of time and controlling sensitization of the portion of the interior surface of the hydrocarbon treating vessel.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: March 1, 2016
    Assignee: UOP LLC
    Inventors: Steven A. Bradley, Benjamin L. Tiemens, Mark W. Mucek, Shixue Wen
  • Patent number: 9211601
    Abstract: An austenitic steel welded joint is produced by gas tungsten arc welding an austenitic steel base metal with a welding material of austenitic steel having a composition comprising: C?0.1%; Si?0.8%; Mn: 1.5 to 5.5%; Ni: 8 to 15%; Cr: 18 to 24%; Al<0.05%; N: 0.15 to 0.35%; and one or more of V?0.5%, Nb?0.5%, and Mo?4.5% if necessary, the balance being Fe and impurities that contain O?0.02%, P?0.05%, and S?0.03%. The chemical composition satisfies [413?462(C+N)?9.2Si?8.1Mn?13.7Cr?9.5Ni?18.5Mo??70]. The amount of ferrite of the weld metal is 20% or less in area ratio. The welded joint has high strength and excellent hydrogen embrittlement resistance and is useful in high-pressure hydrogen gas piping where no postweld heat treatment is performed.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: December 15, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Hirata, Tomohiko Omura, Yusaku Tomio, Jun Nakamura
  • Patent number: 9169543
    Abstract: Precipitation-hardened, martensitic, cast stainless steel having a composition comprising, by mass, 0.08-0.18% of C, 1.5% or less of Si, 2.0% or less of Mn, 0.005-0.4% of S, 13.5-16.5% of Cr, 3.0-5.5% of Ni, 0.5-2.8% of Cu, 1.0-2.0% of Nb, and 0.12% or less of N, the amounts of C, N and Nb meeting the condition of ?0.2?9 (C %+0.86N %)?Nb %?1.0, the rest being Fe and inevitable impurities, and having a structure in which Cu precipitates having an average particle size of 0.1-0.4 ?m are dispersed in a tempered-martensite-based matrix.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: October 27, 2015
    Assignee: HITACHI METALS, LTD.
    Inventors: Masahide Kawabata, Seiichi Endo, Masanori Hara, Koki Otsuka
  • Publication number: 20150139851
    Abstract: The invention provides ferritic stainless steels having excellent scale adhesion and thermal fatigue properties. The ferritic stainless steels include, by mass %, C: not more than 0.020%, Si: not more than 1.0%, Mn: not more than 1.0%, P: not more than 0.040%, S: not more than 0.030%, Cr: 16.0% to 20.0%, N: not more than 0.020%, Nb: 0.30% to 0.80%, Ti: from 4×(C %+N %) % to 0.50% wherein C % and N % indicate the C content and the N content (mass %), respectively, Al: less than 0.20%, Ni: 0.05% to 0.40%, and Co: 0.01% to 0.30%, the balance being Fe and inevitable impurities.
    Type: Application
    Filed: May 23, 2013
    Publication date: May 21, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Tetsuyuki Nakamura, Hiroki Ota, Hiroyuki Ogata
  • Publication number: 20150076386
    Abstract: An iron-based alloy includes (in weight percent) carbon from about 1 to about 2 percent; manganese up to about 1 percent; silicon up to about 1 percent; nickel up to about 4 percent; chromium from about 10 to about 25 percent; molybdenum from about 5 to about 20 percent; tungsten up to about 4 percent; cobalt from about 17 to about 23 percent; vanadium up to about 1.5 percent; boron up to about 0.2 percent; sulfur up to about 0.03 percent; nitrogen up to about 0.4 percent; phosphorus up to about 0.06 percent; niobium up to about 4 percent; iron from about 35 to about 55 percent; and incidental impurities. The chromium/molybdenum ratio of the iron-based alloy is from about 1 to about 2.5. The alloy is suitable for use in elevated temperature applications, such as valve seat inserts for combustion engines.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Applicant: L.E. Jones Company
    Inventors: Cong Yue Qiao, David Doll, Todd Trudeau, Peter Vennema
  • Publication number: 20150047831
    Abstract: A stainless steel for oil wells which has excellent high-temperature corrosion resistance and can stably obtain a strength of not less than 758 MPa is provided. The stainless steel for oil wells contains, by masse, C: not more than 0.05%, Si: not more than 1.0%, Mn: 0.01 to 1.0%, P: not more than 0.05%, S: less than 0.002%, Cr: 16 to 18%, Mo: 1.8 to 3%, Cu: 1.0 to 3.5%, Ni: 3.0 to 5.5%, Co: 0.01 to 1.0%, Al: 0.001 to 0.1%, O: not more than 0.05%, and N: not more than 0.05%, the balance being Fe and impurities, and satisfies Formulas (1) and (2): Cr+4Ni+3Mo+2Cu?44??(1) Cr+3Ni+4Mo+2Cu/3?46??(2) where each symbol of element in Formulas (1) and (2) is substituted by the content (mass %) of a corresponding element.
    Type: Application
    Filed: February 27, 2013
    Publication date: February 19, 2015
    Inventors: Shinjiro Nakatsuka, Taro Ohe, Hisashi Amaya, Hideki Takabe, Yohei Otome, Yusaku Tomio, Masanao Seo, Tomohiko Omura, Kunio Kondo
  • Publication number: 20150027598
    Abstract: A hardenable chromium-nickel steel, comprising 0.005 to 0.12% carbon, 9 to 17% chromium, 5 to 12% nickel, at most 3% cobalt, 0.5 to 4% molybdenum, 0.25 to 1.0% silicon, 0.5% to 3.0% manganese, 1 to 3% titanium, 0.25 to 1% vanadium, 0.05 to 0.5% niobium, 0.001 to 0.30% nitrogen, at most 0.5% tantalum, 0.001 to 0.030% sulfur, 0.2 to 2.0% copper, at most 0.5% tungsten, at most 1.5% aluminum, 0.0001 to 0.01% boron, and at most 0.035% phosphorus, remainder iron including impurities resulting from smelting, is suitable in particular as a material for producing wire by drawing in the 3-phase region of ?-martensite, ?-martensite, and austenite, in conjunction with a heat treatment. The wire can be used for components for instrument construction, surgical needles, valve pins, and dental braces.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 29, 2015
    Inventors: Stefan Seng, Gisbert Klossulitzka, Osakar Pacher, Günter Schnabel
  • Publication number: 20150010424
    Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.
    Type: Application
    Filed: September 26, 2014
    Publication date: January 8, 2015
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Publication number: 20140369882
    Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.
    Type: Application
    Filed: August 11, 2014
    Publication date: December 18, 2014
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Publication number: 20140363328
    Abstract: Provided is ferritic stainless steel that realizes high corrosion resistance of a welded zone and that has high resistance to weld cracking. The ferritic stainless steel contains, by mass %, C: 0.001% to 0.030%, Si: 0.03% to 0.80%, Mn: 0.05% to 0.50%, P: 0.03% or less, S: 0.01% or less, Cr: 19.0% to 28.0%, Ni: 0.01% to less than 0.30%, Mo: 0.2% to 3.0%, Al: more than 0.15% to 1.2%, V: 0.02% to 0.50%, Cu: less than 0.1%, Ti: 0.05% to 0.50%, N: 0.001% to 0.030%, and Nb: less than 0.05%. The expression Nb×P?0.0005 is satisfied in which each element symbol represents the content (by mass %) of the element, and the balance is Fe and inevitable impurities.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 11, 2014
    Inventors: Tomohiro Ishii, Shin Ishikawa, Hiroyuki Ogata
  • Publication number: 20140356641
    Abstract: This heat-resistant austenitic stainless steel has a specific composition containing Ce and Zr and has an Hv1/Hv0 ratio of 1.20 or higher, where Hv1 is the average hardness of the area ranging from the surface to a thickness-direction depth of 50 ?m and Hv0 is the average hardness of the thickness-direction central part.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 4, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Shigenobu Namba
  • Publication number: 20140308154
    Abstract: The invention provides ferritic stainless steels exhibiting good weldability and excellent corrosion resistance even under such welding conditions that sensitization is induced. The ferritic stainless steel includes, by mass %, C: 0.001 to 0.030%, Si: more than 0.3 to 0.55%, Mn: 0.05 to 0.50%, P: not more than 0.05%, S: not more than 0.01%, Cr: 19.0 to 28.0%, Ni: 0.01 to less than 0.30%, Mo: 0.2 to 3.0%, Al: more than 0.08 to 1.2%, V: 0.02 to 0.50%, Cu: less than 0.1%, Nb: 0.005 to 0.50%, Ti: 0.05 to 0.50%, and N: 0.001 to 0.030%, the balance being Fe and inevitable impurities, the ferritic stainless steel satisfying Equations (1) and (2).
    Type: Application
    Filed: November 28, 2012
    Publication date: October 16, 2014
    Inventors: Tomohiro Ishii, Shin Ishikawa, Hiroyuki Ogata
  • Patent number: 8858872
    Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: October 14, 2014
    Assignee: ATI Properties, Inc.
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P Stinner, John J. Dunn, John F. Grubb
  • Publication number: 20140294658
    Abstract: Provided is a ferritic stainless steel excellent in terms of thermal fatigue resistance and oxidation resistance without adding Mo or W, which is an expensive chemical element and with controlling Nb content to be as small as possible. The chemical composition contains, by mass %, C: 0.020% or less, Si: 3.0% or less, Mn: 3.0% or less, P: 0.040% or less, S: 0.030% or less, Cr: 10% to 25%, N: 0.020% or less, Nb: 0.005% to 0.15%, Al: less than 0.20%, Ti: 5×(C %+N %) to 0.5%, Mo: 0.1% or less, W: 0.1% or less, Cu: 0.55% to 2.0%, B: 0.0002% to 0.0050%, Ni: 0.05% to 1.0%, and the balance being Fe and inevitable impurities, where C % and N % in the expression 5×(C %+N %) respectively represent the contents (mass %) of the chemical elements C and N.
    Type: Application
    Filed: October 11, 2012
    Publication date: October 2, 2014
    Inventors: Tetsuyuki Nakamura, Hiroki Ota, Hiroyuki Ogata
  • Publication number: 20140255244
    Abstract: One aspect of this duplex stainless steel contains, in mass %, C: 0.03% or less, Si: 0.05% to 1.0%, Mn: 0.1% to 7.0%, P: 0.05% or less, S: 0.0001% to 0.0010%, Ni: 0.5% to 5.0%, Cr: 18.0% to 25.0%, N: 0.10% to 0.30%, Al: 0.05% or less, Ca: 0.0010% to 0.0040%, and Sn: 0.01% to 0.2%, with the remainder being Fe and inevitable impurities, wherein a ratio Ca/O of the amounts of Ca and O is in a range of 0.3 to 1.0, and a pitting index PI shown by formula (1) is in a range of less than 30, PI=Cr+3.3Mo+16N??(1).
    Type: Application
    Filed: October 17, 2012
    Publication date: September 11, 2014
    Inventors: Shinji Tsuge, Yuusuke Oikawa, Hiroshi Urashima, Haruhiko Kajimura
  • Publication number: 20140241931
    Abstract: Provided is a ferritic stainless steel excellent in terms of thermal fatigue resistance, high-temperature fatigue resistance and oxidation resistance without adding Mo or W, which is an expensive chemical element and with controlling Nb content to be as small as possible. The chemical composition contains, by mass %, C: 0.020% or less, Si: 3.0% or less, Mn: 3.0% or less, P: 0.040% or less, S: 0.030% or less, Cr: 10% to 25%, N: 0.020% or less, Nb: 0.005% to 0.15%, Al: 0.20% to 3.0%, Ti: 5×(C %+N %) to 0.5%, Mo: 0.1% or less, W: 0.1% or less, Cu: 0.55% to 2.0%, B: 0.0002% to 0.0050%, Ni: 0.05% to 1.0%, and the balance being Fe and inevitable impurities, where C % and N % in the expression 5×(C %+N %) respectively represent the contents (mass %) of the chemical elements C and N.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 28, 2014
    Applicant: JFE STEEL CORPORATION
    Inventors: Tetsuyuki Nakamura, Hiroki Ota, Hiroyuki Ogata
  • Patent number: 8778260
    Abstract: The present invention provides duplex stainless steel superior in corrosion resistance in a chloride environment and impact properties suitable as a material for pumps for seawater desalination plants, facilities and equipment, and materials for chemical tanks, that is, duplex stainless steel characterized by containing, by mass %, C: 0.06% or less, Si: 0.05 to 3.0%, Mn: 0.1 to 6.0%, P: 0.05% or less, S: 0.010% or less, Ni: 1.0 to 10.0%, Cr: 18 to 30%, Mo: 5.0% or less, Cu: 3.0% or less, N: 0.10 to 0.40%, Al: 0.001 to 0.08% or less, Ti: 0.003 to 0.05%, Mg: 0.0001 to 0.0030%, and O: 0.010% or less, having a product of an activity coefficient fN of N, Ti content, and N content fN×Ti×N of 0.00004%2 or more, and having a product of Ti content and N content Ti×N of 0.008%2 or less.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: July 15, 2014
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Shinji Tsuge, Yuusuke Oikawa, Shigeo Fukumoto
  • Publication number: 20140161658
    Abstract: A precipitation hardenable, martensitic stainless steel alloy is disclosed. The alloy has the following composition in weight percent, about C ?0.03 max Mn ?1.0 max Si ?0.75 max P 0.040 max S 0.020 max Cr 10-13 Ni 10.5-11.6 Mo 0.25-1.5? Co 0.5-1.5 Cu ?0.75 max Ti 1.5-1.8 Al 0.3-0.8 Nb 0.3-0.8 B 0.010 max N 0.030 max The balance is iron and usual impurities. The disclosed alloy provides a unique combination of corrosion resistance, strength, and toughness.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 12, 2014
    Applicant: CRS HOLDINGS, INC.
    Inventors: David E. Wert, Michael L. Schmidt
  • Patent number: 8684594
    Abstract: A constant-modulus alloy, which has a low saturation magnetic flux density to provide weakly magnetic properties, a high Young's modulus, a low temperature coefficient of Young's modulus, and high hardness, is provided. A hairspring, a mechanical driving apparatus and a watch and clock, in which the alloy is used, are provided. The alloy consists of Co, Ni, Cr, Mo. and Fe. The alloy is healed and cooled before being subjected to repeated wiredrawing and intermediate annealing, forming a wire with a fiber structure having a <111> fiber axis. The wire is then cold rolled into a sheet and heated to obtain optimal magnetic insensitivity and hardness.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: April 1, 2014
    Assignees: The Foundation: The Research Institute for Electric and Magnetic Materials, Seiko Instruments Inc.
    Inventors: Yuetsu Murakami, Koichiro Jujo, Osamu Takahashi, Jun Tsuneyoshi, Ryo Sugawara, Takeshi Takano
  • Publication number: 20130343948
    Abstract: A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of standard type of two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the ?pre expressed by formula (3) is 1350-1450. (1) PI=Cr+3.
    Type: Application
    Filed: March 9, 2012
    Publication date: December 26, 2013
    Inventors: Yusuke Oikawa, Shinji Tsuge, Hiroshige Inoue, Ryo Matsuhashi
  • Patent number: 8607941
    Abstract: A steel sheet for a brake disc contains, on a mass percent basis, 0.02% or more and less than 0.10% C, 0.6% or less Si, more than 0.5% and 2.0% or less Mn, 0.06% or less P, 0.01% or less S, 0.05% or less Al, 11.0% to 13.5% Cr, 0.01% to 0.30% Ni, 0.10% to 0.60% Nb, 0.03% or more and less than 0.10% N, more than 0.0010% and 0.0060% or less B, and the balance being Fe and incidental impurities, and the steel sheet after quenching has a hardness of 32 HRC to 40 HRC on a Rockwell hardness scale C (HRC).
    Type: Grant
    Filed: May 31, 2010
    Date of Patent: December 17, 2013
    Assignee: JFE Steel Corporation
    Inventors: Katsuhisa Yamauchi, Mitsuyuki Fujisawa, Yasushi Kato, Hiroki Ota, Hideya Furusawa, Takumi Ujiro
  • Publication number: 20130309124
    Abstract: An austenitic Fe—Ni—Cr alloy comprises C: 0.005˜0.03 mass %, Si: 0.15˜1.0 mass %, Mn: not more than 2.0 mass %, P: not more than 0.030 mass %, S: not more than 0.002 mass %, Cr: 18˜28 mass %, Ni: 20˜38 mass %, Mo: 0.10˜3 mass %, Co: 0.05˜2.0 mass %, Cu: less than 0.25 mass %, N: not more than 0.02 mass %, provided that PRE=Cr+3.3×Mo+16×N?20.0 and PREH=411?13.2×Cr?5.8×Mo+0.1×Mo2+1.2×Cu?145.0 (wherein each element symbol represents a content (mass %) of each element) and has an excellent corrosion resistance in air or under a wet environment even at a surface state having an oxide film formed by a intermediate heat treatment on the way of the production process.
    Type: Application
    Filed: April 22, 2013
    Publication date: November 21, 2013
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Kazuhiro YAMAKAWA, Shigeru HIRATA, Kun WANG
  • Publication number: 20130294959
    Abstract: Disclosed is a ferritic heat-resistant steel which has the following chemical composition (by weight): C: from 0.01% to less than 0.08%; Si: 0.30-1.0%; P: 0.02 or less; S: 0.010% or less; Mn: 0.2-1.2%; Ni: 0.3% or less; Cr: 8.0-11.0%; Mo: 0.1-1.2%; W: 1.0-2.5%; V: 0.10-0.30%; Nb: 0.02-0.12%; Co: 0.01-4.0%; N: 0.01-0.08%; B: not less than 0.001% and less than 0.010%; Cu: 0.3% or less; and Al: 0.010% or less, provided that the chemical composition satisfies the following equations: Mo(%)+0.5×W(%)=1.0-1.6, and C(%)+N(%)=0.02-0.15%, and which comprises a tempered martensite single-phase tissue produced by thermal refining and contains 30% by weight or less of 5 ferrite.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Toshio FUJITA, Takashi SATO, Kohji TAMURA
  • Publication number: 20130288074
    Abstract: This alloying element-saving hot rolled duplex stainless steel material contains, by mass %, C: 0.03% or less, Si: 0.05% to 1.0%, Mn: 0.5% to 7.0%, P: 0.05% or less, S: 0.010% or less, Ni: 0.1% to 5.0%, Cr: 18.0% to 25.0%, N: 0.05% to 0.30% and Al: 0.001% to 0.05%, with a remainder being Fe and inevitable impurities, wherein the alloying element-saving hot rolled duplex stainless steel material is produced by hot rolling, a chromium nitride precipitation temperature TN is in a range of 960° C. or lower, a yield strength is 50 MPa or more higher than that of a hot rolled steel material which is subjected to a solution heat treatment, and the alloying element-saving hot rolled duplex stainless steel material is as hot rolled state, and is not subjected to a solution heat treatment. This clad steel plate includes a duplex stainless steel as a cladding material, the duplex stainless steel has the above composition, and the chromium nitride precipitation temperature TN is in a range of 800° C. to 970° C.
    Type: Application
    Filed: January 26, 2012
    Publication date: October 31, 2013
    Inventors: Shinji Tsuge, Yuusuke Oikawa, Yoichi Yamamoto, Haruhiko Kajimura, Kazuhiko Ishida
  • Publication number: 20130174948
    Abstract: The invention concerns an austenite-ferrite stainless steel composition, whose composition contains in % by weight: 0.01%?C?0.10% 20.0%?Cr?24.0% 1.0%?Ni?3.0% 0.12%?N?0.20% 0.5%?Mn?2.0% 1.6%?Cu?3.0% 0.05% 5 Mo 5 1.0% W?0.15% 0.05%?Mo +W/2?1.0% 0.2%?Si?1.5% Al?0.05% V?0.5% Nb?0.5% Ti?0.5% B?0.003% Co?0.5% REM?0.1% Ca?0.03% Mg?0.1% Se?0.005% O?0.01% S?0.030% P?0.040% the rest being iron and impurities resulting from the production and the microstructure being composed of austenite and 35 to 65% ferrite by volume, the composition furthermore obeying the following relations: 40?IF?65 with IF=10%Cr+5.1%Mo+1.4%Mn+24.3%Si+35%Nb+71.5%Ti?595.4%C?245.1%N?9.3%Ni?3.3%Cu?99.8 and IRCGCU?32.0 with IRCGCU=%Cr+3.3%Mo+2%Cu+16%N+2.6%Ni?0.7%Mn and 0?IU?6.0 with IU=3%Ni+%Cu+%Mn?100%C?25%N?2(%Cr+%Si)?6%Mo+45 as well as a method of manufacture of plates, bands, coils, bars, wires, profiles, forged pieces and molded pieces of this steel.
    Type: Application
    Filed: July 5, 2011
    Publication date: July 11, 2013
    Applicants: UGITECH, ArcelorMittal Investigacion Y Desarrollo SL
    Inventors: Jerome Peultier, Amelie Fanica, Nicolas Renaudot, Christophe Bourgin, Eric Chauveau, Marc Mantel