Two Percent Or More Silicon Containing Patents (Class 420/117)
  • Patent number: 9353829
    Abstract: At least one member composing a chain bearing, such as a pin, includes a surface layer composed of vanadium carbonitride (VCN) coating on a surface of a base material of the at least one member. An oxide (VO) film having a predetermined thickness is also formed on a surface of the surface layer such that the oxide film is interposed between the surface layer and another member, such as a pin hole, composing the chain bearing.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: May 31, 2016
    Assignee: DAIDO KOGYO CO., LTD.
    Inventors: Masashi Nishikawa, Yoshio Okumura, Yuma Ohsaka, Motoki Tanaka
  • Publication number: 20150118097
    Abstract: High cleanliness spring steel useful in manufacturing a spring with SiO2-based inclusions being extremely controlled and excellent in fatigue properties is provided. High cleanliness spring steel which is steel containing; C: 1.2% (means mass %, hereafter the same with respect to the component) or below (not inclusive of 0%), Si: 1.2-4%, Mn: 0.1-2.0%, Al: 0.01% or below (not inclusive of 0%), and the balance comprising iron with inevitable impurities, wherein; the total of oxide-based inclusions of 4 or above of L (the large diameter of an inclusion)/D (the short diameter of an inclusion) and 25 ?m or above of D and oxide-based inclusions of less than 4 L/D and 25 ?m or above of L, in the oxide-based inclusions of 25 mass % or above of oxygen concentration and 70% (means mass %, hereafter the same with respect to inclusions) or above of SiO2 content when Al2O3 +MgO+CaO+SiO2+MnO=100% is presumed, out of inclusions in the steel, is 20 nos./500 g or below.
    Type: Application
    Filed: January 9, 2015
    Publication date: April 30, 2015
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Tomoko SUGIMURA, Sei KIMURA, Koichi SAKAMOTO, Atsuhiko YOSHIDA, Takeshi INOUE
  • Patent number: 8986468
    Abstract: A cold rolled steel sheet satisfying on the basis of percent by mass the chemical composition of 0.06-0.6% C, 0.1-2% Si, 0.01-3% Al, 1-4% Si+Al, 1-6% Mn, Si/Mn?0.40, in which there exists 10 or more pieces/100 ?m2 of Mn—Si composite oxide having Mn—Si atom ratio (Mn/Si) of 0.5 or over and major axis of from 0.01 ?m to 5 ?m and also having a covering ratio of 10% or below at which the surface of the steel sheet is covered with oxide containing Si as the main component.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: March 24, 2015
    Assignee: Kobe Steel, Ltd.
    Inventors: Masaaki Miura, Shinji Kozuma, Yoichi Mukai, Yoshinobu Omiya
  • Patent number: 8951364
    Abstract: The invention relates to an Fe—Co alloy, the composition of which comprises in % by weight: 6?Co+Ni?22 Si?0.2 0.5?Cr?8 Ni?4 0.10?Mn?0.90 Al?4 Ti?1 C?1 Mo?3 V+W?3 Nb+Ta?1 Si+Al?6 O+N+S+P+B?0.1 the balance of the composition consisting of iron and inevitable impurities due to the smelting, it being furthermore understood that the contents thereof satisfy the following relationships: Co+Si?Cr?27 Si+Al+Cr+V+Mo+Ti?3.5 1.23(Al+Mo)+0.84(Si+Cr+V)?1.3 14.5(Al+Cr)+12(V+Mo)+25 Si?50.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: February 10, 2015
    Assignee: Aperam Alloys Imphy
    Inventors: Thierry Waeckerle, Herve Fraisse
  • Patent number: 8951365
    Abstract: A steel which is excellent in delayed fracture resistance containing, by mass %, C: 0.10 to 0.55%, Si: 0.01 to 3%, and Mn: 0.1 to 2%, further containing one or more of Cr: 0.05 to 1.5%, V: 0.05 to 0.2%, Mo: 0.05 to 0.4%, Nb: 0.001 to 0.05%, Cu: 0.01 to 4%, Ni: 0.01 to 4%, and B: 0.0001 to 0.005%, and having a balance of Fe and unavoidable impurities, the structure being a mainly tempered martensite structure, the surface of the steel being formed with (a) a nitrided layer having a certain thickness range and a nitrogen concentration higher than the nitrogen concentration of the steel by 0.02 mass % or more and (b) a low carbon region having a certain depth range from the surface of the steel and having a carbon concentration of 0.9 time or less the carbon concentration of the steel.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: February 10, 2015
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Daisuke Hirakami, Tetsushi Chida, Toshimi Tarui
  • Patent number: 8876986
    Abstract: Disclosed is a high-strength cold-rolled steel sheet having improved stretch-flange formability and excellent hydrogen embrittlement resistance. In addition to Fe, C, Si, Mn, P, S, N, and Al, the steel sheet contains V or at least one element of Nb, Ti and Zr. The contents of the at least one element of Nb, Ti and Zr, if present, satisfy the expression of [% C]?[% Nb]/92.9×12?[% Ti]/47.9×12?[% Zr]/91.2×12>0.03. The steel sheet has an area ratio of tempered martensite of 50% or more with ferrite as the remainder. The number of precipitates having a circle-equivalent diameter of 1 to 10 nm is 20 particles or more per 1 ?m2 of the tempered martensite. The number of precipitates containing V or the at least one element of Nb, Ti and Zr and having a circle-equivalent diameter of 20 nm or more is 10 particles or less per 1 ?m2 of the tempered martensite.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: November 4, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Hideo Hata, Toshio Murakami, Akira Ibano, Fumio Yuse, Junichiro Kinugasa
  • Publication number: 20140314616
    Abstract: Provided is a hot-rolled steel sheet having a composition containing 0.04 mass percent to 0.20 mass percent C, 0.7 mass percent to 2.3 mass percent Si, 0.8 mass percent to 2.8 mass percent Mn, 0.1 mass percent or less P, 0.01 mass percent or less S, 0.1 mass percent or less Al, and 0.008 mass percent or less N, the remainder being Fe and inevitable impurities. Internal oxides containing one or more selected from the group consisting of Si, Mn, and Fe are present at grain boundaries and in grains in a base metal. The internal oxides present at the grain boundaries in the base metal are located within 5 ?m from the surface of the base metal. The difference between the depths at which the internal oxides are formed in the cross direction of the steel sheet is 2 ?m or less.
    Type: Application
    Filed: November 2, 2012
    Publication date: October 23, 2014
    Applicant: JFE STEEL CORPORATION
    Inventors: Mai Miyata, Yoshitsugu Suzuki, Yasunobu Nagataki, Yoshiyasu Kawasaki, Hirokazu Sugihara
  • Publication number: 20140271331
    Abstract: This high-strength steel plate has a component composition including, by mass %, C: 0.02-0.3%, Si: 1-3%, Mn: 1.8-3%, P: 0.1% or less, S: 0.01% or less, Al: 0.001-0.1%, N: 0.002-0.03%, the rest consisting of iron and impurities. Said steel plate has a microstructure including, in terms of area ratio relative to the entire microstructure, each of the following phases: bainitic ferrite: 50-85%; retained ?; 3% or greater; martensite+the aforementioned retained ?; 10-45%; and ferrite: 5-40%. The C concentration (C?R) in the aforementioned retained austenite is 0.3-1.2 mass %, part or all of the N in the aforementioned component composition is solid solution N, and the amount of said solid solution N is 30-100 ppm.
    Type: Application
    Filed: August 15, 2012
    Publication date: September 18, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Toshio Murakami, Elijah Kakiuchi, Hideo Hata, Naoki Mizuta, Tatsuya Asai
  • Publication number: 20140251085
    Abstract: The present invention provides a powder core used for high-frequency magnetic components and a soft magnetic metal powder which is suitable for the manufacturing of the above-described powder core. The invention relates to a soft magnetic metal powder, consisting of, in terms of mass %: 0.5% to 10.0% of Si, 1.5% to 8.0% of Cr, and 0.05% to 3.0% of Sn, with the balance being Fe and unavoidable impurities.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 11, 2014
    Inventors: Mikiko Tsutsui, Yuichiro Fujita
  • Patent number: 8802005
    Abstract: The present invention is steel for surface hardening for machine structural use which contains, by mass %, C: 0.3 to 0.6%, Si: 0.02 to 2.0%, Mn: 0.35 to less than 1.5%, and Al: 0.01 to 0.5%, is restricted to B: less than 0.0003%, S: 0.0001 to 0.021%, N: 0.003 to 0.0055%, P: 0.0001 to 0.03%, and O: 0.0001 to 0.0050%, has a ratio Mn/S of Mn and S satisfying 70 to 30,000, has a balance of Fe and unavoidable impurities, and, when nitrided, then induction hardened, has a surface hardenability of a Vicker's hardness when tempered at 300° C. of 650 or more.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: August 12, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Atsushi Mizuno, Masayuki Hashimura, Kei Miyanishi, Shuji Kozawa
  • Publication number: 20140150249
    Abstract: A semi-processed electrical steel is provided comprising the elements .005 ? Tin ? .09% 0 < Carbon ? 0.050% .10 ? Manganese ? 1.00% .005 ? Phosphorus ? .120% .0 < Sulfur ? .010% .50 ? Silicon ? 2.50% .01 ? Aluminum ? 1.60% .0 ? Antimony < .
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Inventor: Gwynne Johnston
  • Publication number: 20140150930
    Abstract: The present invention relates to a hot press forming steel plate made of a composition comprising: 0.3-1.0 wt % of C; 0.0-4.0 wt % of Mn; 1.0-2.0 wt % of Si; 0.01-2.0 wt % of Al; 0.015 wt % or less of S; 0.01 wt % or less of N; and the remainder being Fe and unavoidable impurities. Further, the present. invention relates to a method for manufacturing the hot press forming steel plate, characterized by comprising the steps of: heating, to between 1100 and 1300° C., a steel slab having the composition; performing hot rolling finishing between. an Ar3 transformation point and 950° C.; and performing winding between MS and 720° C. Further, the present invention. relates to a hot press formed member characterized by having the composition, and having a dual phase microstructure made of bainite and residual austenite.
    Type: Application
    Filed: July 15, 2011
    Publication date: June 5, 2014
    Inventors: Kyoo-Young Lee, Jin-Keun Oh, Jong-Sang Kim, Tae-Kyo Han
  • Patent number: 8663399
    Abstract: An iron-based amorphous alloy and magnetic core with an iron-based amorphous alloy having a chemical composition with a formula FeaBbSicCd, where 81<a?84, 10?b?18, 0<c?5 and 0<d<1.5, numbers being in atomic percent, with incidental impurities, simultaneously have a value of a saturation magnetic induction exceeding 1.6 tesla, a Curie temperature of at least 300° C. and a crystallization temperature of at least 400° C. When cast in a ribbon form, such an amorphous metal alloy is ductile and thermally stable, and is suitable for various electric devices because of high magnetic stability at such devices' operating temperatures.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: March 4, 2014
    Assignees: Metglas, Inc., Hitachi Metals, Ltd.
    Inventors: Ryusuke Hasegawa, Daichi Azuma, Yoshihito Yoshizawa, Yuichi Ogawa
  • Patent number: 8657972
    Abstract: A bainitic steel with simultaneous high yield strength and high fracture toughness includes at least 5 volume percent austenite as well as iron, carbon, and silicon. The silicon is present in an amount of at least 1.5 weight percent of total weight of the bainitic steel. A method of forming the steel by austempering is also provided.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: February 25, 2014
    Assignee: Wayne State University
    Inventor: Susil K. Putatunda
  • Publication number: 20130330226
    Abstract: This high-strength steel sheet has a component composition containing, in mass %, 0.02 to 0.3% C, 1 to 3% Si, 1.8 to 3% Mn, 0.1% or less P, 0.01% or less S, 0.001 to 0.1% Al, and 0.002 to 0.03% N, the remainder being iron and impurities. The high-strength steel sheet has a structure containing, in terms of area ratio relative to the entire structure, each of the following phases: 50 to 85% bainitic ferrite; 3% or more retained austenite (?); 10 to 45% martensite and the aforementioned retained austenite (?); and 5 to 40% ferrite. The ratio between the Mn concentration (Mn?R) in the retained austenite (?) and the average Mn concentration (Mnav) in the entire structure is 1.2 or more (Mn?R/ Mnav) based on the Mn concentration distribution obtained by means of EPMA line analysis. As a consequence, the high-strength steel sheet exhibits strength of 980 MPa or more and exerts excellent deep drawability.
    Type: Application
    Filed: February 27, 2012
    Publication date: December 12, 2013
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Toshio Murakami, Elijah Kakiuchi, Hideo Hata, Tatsuya Asai, Naoki Mizuta
  • Publication number: 20130323112
    Abstract: In a hot-rolled sheet, an average value of pole densities of an orientation group {100}<011> to {223}<110>, which is represented by an arithmetic mean of pole densities of orientations {100}<011>, {116}<110>, {114}<110>, {112}<110>, and {223}<110> in a thickness center portion of a thickness range of ? to ? from a surface of the steel sheet, is 1.0 to 6.5 and a pole density of a crystal orientation {332}<113> is 1.0 to 5.0; and a Lankford value rC in a direction perpendicular to a rolling direction is 0.70 to 1.10 and a Lankford value r30 in a direction that forms 30° with respect to the rolling direction is 0.70 to 1.10.
    Type: Application
    Filed: March 5, 2012
    Publication date: December 5, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Riki Okamoto, Nobuhiro Fujita, Manabu Takahashi, Kunio Hayashi, Tetsuo Kishimoto, Kazuaki Nakano, Takeshi Yamamoto
  • Publication number: 20130272915
    Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.
    Type: Application
    Filed: June 12, 2013
    Publication date: October 17, 2013
    Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
  • Publication number: 20130189148
    Abstract: A wire rod and steel wire having superior magnetic characteristics and a method for manufacturing same, wherein the wire rod and the steel wire can be used in transformers, vehicles, electric or electronic products, or the like which require low iron loss and high permeability. Provided are a wire rod and steel wire having superior magnetic characteristics and a method for manufacturing same, wherein the wire rod or the steel wire comprises, by wt %, 0.03 to 0.05% of C, 3.0 to 5.0% of Si, 0.1 to 2.0% of Mn, 0.02 to 0.08% of Al, 0.0015 to 0.0030% of N, and the remainder being Fe and unavoidable impurities. The wire rod and steel wire having directional properties may be provided by a general manufacturing process without using expensive alloying elements and without having to add a manufacturing facility.
    Type: Application
    Filed: November 9, 2011
    Publication date: July 25, 2013
    Applicant: POSCO
    Inventors: Dong-Hyun Kim, You-Hwan Lee, Woo-Gi Shin
  • Patent number: 8491731
    Abstract: An alloy composition of FeaBbSicPxCyCuz. Parameters meet the following conditions: 79?a?86 atomic %; 5?b?13 atomic %; 0?c?8 atomic %; 1?x?8 atomic %; 0?y?5 atomic %, 0.4?z?1.4 atomic %; and 0.08?z/x?0.8. Or, parameters meet the following conditions: 81?a?86 atomic %; 6?b?10 atomic %; 2?c?8 atomic %; 2?x?5 atomic %; 0?y?4 atomic %; 0.4?z?1.4 atomic %, and 0.08?z/x?0.8.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: July 23, 2013
    Inventor: Akihiro Makino
  • Publication number: 20130153091
    Abstract: A hot-rolled steel sheet has an average value of the X-ray random intensity ratio of a {100} <011> to {223} <110> orientation group at least in a sheet thickness central portion that is in a sheet thickness range of ? to ? from a steel sheet surface of 1.0 to 6.0, an X-ray random intensity ratio of a {332} <113> crystal orientation of 1.0 to 5.0, rC which is an r value in a direction perpendicular to a rolling direction of 0.70 to 1.10, and r30 which is an r value in a direction that forms an angle of 30° with respect to the rolling direction of 0.70 to 1.10.
    Type: Application
    Filed: July 27, 2011
    Publication date: June 20, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Nobuhiro Fujita, Kunio Hayashi, Riki Okamoto, Manabu Takahashi, Tetsuo Kishimoto, Hiroshi Yoshida
  • Patent number: 8414712
    Abstract: Disclosed are a thin strip of an amorphous alloy having excellent workability, a nanocrystalline soft magnetic alloy which can stably provide good magnetic properties, and a magnetic core using the nanocrystalline soft magnetic alloy. The thin strip of an amorphous alloy is characterized in that the thin strip is formed of an alloy having a composition represented by Fe100-a-b-c-dMaSibBcCud (atomic %), wherein 0?a?10, 0?b?20, 4?c?20, 0.1?d?3, and 9?a+b+c?35, and containing unavoidable impurities, and, in the composition, M represents at least one element selected from Ti, V, Zr, Nb, Mo, Hf, Ta, and W, a Cu segregated part is present, on the surface side of the thin strip of the amorphous alloy, in which Cu is segregated at a higher concentration than the Cu concentration in the outermost surface part of the thin strip of the amorphous alloy, and the highest Cu concentration in the Cu segregated part is not more than 4 atomic %.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: April 9, 2013
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yoshihito Yoshizawa, Motoki Ohta
  • Publication number: 20130076477
    Abstract: The present invention provides a Fe-group-based soft magnetic powder that is used for the pressed powder magnetic cores for a choke coil, reactor coil, etc., and that has a higher magnetic permeability. At least one selected from Fe, Co, or Ni that is generally used is used as the main component of the Fe-group-based alloy (iron-based alloy) soft magnetic powder. The soft magnetic powder is produced by adding a small amount of Nb (0.05-4 wt %) or V, Ta, Ti, Mo, or W, to the molten metal and by means of an inexpensive method such as the water-atomizing method.
    Type: Application
    Filed: June 7, 2011
    Publication date: March 28, 2013
    Inventor: Yasushi Kino
  • Publication number: 20130069015
    Abstract: In order to establish an electric-discharge surface treatment capable of forming a smooth high-hardness coating, in the electric-discharge surface treatment in which pulsed electric discharge is generated between the electrode and a base material in a machining fluid or in the air by using a green compact, which is formed by compressing powder of an electrode material, as an electrode, and by using energy of the electric discharge, a coating including the electrode material or a reaction product of the electrode material reacted by the electric discharge energy is formed on a surface of the base material, wherein, as the powder of the electrode material, a mixed powder formed by mixing 10 to 75 vol % of Si powder to powder of a hard material is used.
    Type: Application
    Filed: May 26, 2010
    Publication date: March 21, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Nobuyuki Sumi, Akihiro Goto, Hiroyuki Teramoto, Yoshikazu Nakano
  • Publication number: 20130039804
    Abstract: An electrical steel comprises a mixture of elements comprising at least the following elements by weight percent. 0% < Chromium <1.0% 0% < Copper <0.10%? 0% < Nickel ?<6.0%. The electrical steel has a partial recrystallization with smaller grain size than would be the grain size given a complete recrystallization. The electrical steel has a yield strength above 550 N/mm2 and an electrical loss below 2.0 watts/pound at 1.5 Tesla at 60 Hz which corresponds to 3.5 watts/kg at 1.5 Tesla at 50 Hz.
    Type: Application
    Filed: October 15, 2012
    Publication date: February 14, 2013
    Inventor: Gwynne Johnston
  • Patent number: 8372217
    Abstract: A magnetic core having an iron-based amorphous alloy that includes: a chemical composition with a formula FeaBbSicCd, where 81.5<a?84, 12<b<17, 1?c<5 and 0.3?d?1.0, numbers being in atomic percent, with incidental impurities, simultaneously having a value of a saturation magnetic induction equal to or exceeding 1.63 tesla, a Curie temperature greater than or equal to 315° C. and less than or equal to 360° C. and a crystallization temperature greater than or equal to 400° C. and less than or equal to 470° C. The core has low core loss and exciting power and is suited for transformers, electrical chokes, power inductors and pulse generation and compression devices.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: February 12, 2013
    Assignees: Metglas, Inc., Hitachi Metals, Ltd.
    Inventors: Ryusuke Hasegawa, Daichi Azuma
  • Publication number: 20120312433
    Abstract: The invention relates to a steel sheet having a tensile strength of 1180 MPa or more, which excels in workability and cold brittleness resistance. The high-strength steel sheet contains 0.10% to 0.30% of C, 1.40% to 3.0% of Si, 0.5% to 3.0% of Mn, 0.1% or less of P, 0.05% or less of S, 0.005% to 0.20% of Al, 0.01% or less of N, 0.01% or less of O, as well as Fe and inevitable impurities. The steel sheet has: (i) a ferrite volume fraction of 5% to 35% and a bainitic ferrite and/or tempered martensite volume fraction of 60% or more; (ii) a MA constituent volume fraction of 6% or less (excluding 0%); and (iii) a retained austenite volume fraction of 5% or more.
    Type: Application
    Filed: June 5, 2012
    Publication date: December 13, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Sae MIZUTA, Yuichi FUTAMURA, Yukihiro Utsumi
  • Publication number: 20120262266
    Abstract: An alloy is provided which consists of Fe100-a-b-c-d-x-y-zCuaNbbMcTdSixByZz and up to 1 at % impurities, M being one or more of the elements Mo, Ta and Zr, T being one or more of the elements V, Mn, Cr, Co and Ni, Z being one or more of the elements C, P and Ge, 0 at %?a<1.5 at %, 0 at %?b<2 at %, 0 at %?(b+c)<2 at %, 0 at %?d<5 at %, 10 at %<x<18 at %, 5 at %<y<11 at % and 0 at %?z<2 at %. The alloy is configured in tape form and has a nanocrystalline structure in which at least 50 vol % of the grains have an average size of less than 100 nm, a hysteresis loop with a central linear region, a remanence ratio Jr/Js of <0.1 and a coercive field strength Hc to anisotropic field strength Ha ratio of <10%.
    Type: Application
    Filed: April 16, 2012
    Publication date: October 18, 2012
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Giselher HERZER, Christian Polak, Viktoria Budinsky
  • Patent number: 8241559
    Abstract: The invention relates to a steel material having a high silicon content, and to a method for the production thereof, the steel material being particularly suitable for piston rings and cylinder sleeves. In addition to iron and production-related impurities, the steel material contains 0.5 to 1.2 wt. % carbon, 3.0 to 15.0 wt. % silicon and 0.5 to 4.5 wt. % nickel. Also, the steel material can contain small amounts of the following elements Mo, Mn, Al, Co Nb, Ti, V, Sn, Mg, B, Te Ta La, Bi, Zr, Sb, Ca, Sr, Cer, rare earth metals and nucleating agents such as NiMg, MiSiMg, FeMg and FeSIMg. due to the high Si content, a degree of saturation higher than 1.0 is attained, with the melting temperature of the steel material corresponding to normal cast iron. The steel material can be produced according to a conventional cast-iron technique and has a high resistance to wear and tear and a high structural strength (minimal distortion).
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: August 14, 2012
    Assignee: Federal-Mogul Burscheid GmbH
    Inventor: Laszlo Pelsoeczy
  • Publication number: 20120160363
    Abstract: Provided are high manganese containing ferrous based components and their use in oil, gas and/or petrochemical applications. In one form, the components include 5 to 40 wt % manganese, 0.01 to 3.0 wt % carbon and the balance iron. The components may optionally include one or more alloying elements chosen from chromium, nickel, cobalt, molybdenum, niobium, copper, titanium, vanadium, nitrogen, boron and combinations thereof.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 28, 2012
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Hyun Woo Jin, Raghavan Ayer, Douglas Paul Fairchild, Mario L. Macia
  • Publication number: 20120156086
    Abstract: A non-oriented electrical steel sheet contains 2.8 mass % or more and 4.0 mass % or less of Si, 0.2 mass % or more and 3.0 mass % or less of Al, and 0.02 mass % or more and 0.2 mass % or less of P. The non-oriented electrical steel sheet contains further contains 0.5 mass % or more in total of at least one kinds selected from a group consisting of 4.0 mass % or less of Ni and 2.0 mass % or less of Mn. A C content is 0.05 mass % or less, a N content is 0.01 mass % or less, an average grain diameter is 15 ?m or less, and a <111> axial density is 6 or larger.
    Type: Application
    Filed: August 25, 2010
    Publication date: June 21, 2012
    Inventor: Takeshi Kubota
  • Patent number: 8187530
    Abstract: An object of this invention is to provide a steel for high-cleanliness spring which is useful for the production of a spring excellent in fatigue characteristics in high Si steels. The steel for high-cleanliness spring with excellent fatigue characteristics according to the invention contains: in terms of mass %, C: 1.2% or less (excluding 0%); Si: 1.8% to 4%; Mn: 0.1% to 2.0%; and total Al: 0.01% or less (excluding 0%), with the remainder being iron and inevitable impurities, in which the Si amount and a solute (SIMS) Ca amount in the steel satisfy a relationship of the following expression (1): Si×10?7?solute (SIMS) Ca?Si×5×10?7??(1) (in which each of the solute (SIMS) Ca and Si represents the amount thereof (mass %) in the steel).
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: May 29, 2012
    Assignee: Kobe Steel, Ltd.
    Inventors: Tomoko Sugimura, Koichi Sakamoto, Yoshio Fukuzaki, Atsuhiko Yoshida, Takeshi Inoue
  • Publication number: 20120121931
    Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg-base or Al—Zn—Mg-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.
    Type: Application
    Filed: January 26, 2012
    Publication date: May 17, 2012
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Mikako TAKEDA, Mamoru Nagao, Masao Kinefuchi
  • Patent number: 8177920
    Abstract: The present invention provides a grain-oriented electrical steel sheet produced by a method for promoting secondary recrystallization without an inhibitor, the grain-oriented electrical steel sheet including 2.0% or more and 4.5% or less of Si and 0.01% or more and 0.5% or less of Mn on a mass % basis, wherein the number of oxide particles having a diameter of 1 to 3 ?m among that (oxide particles) of containing Ca and/or Mg is 400 or less per unit area (1 cm2) in a transverse cross-section perpendicular to a rolling direction. Therefore, the grain-oriented electrical steel sheet has excellent stable magnetic properties throughout the length of a coil.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: May 15, 2012
    Assignee: JFE Steel Corporation
    Inventors: Yukihiro Shingaki, Minoru Takashima, Tadashi Nakanishi, Takeshi Murai
  • Publication number: 20120013430
    Abstract: A slab having a predetermined composition is heated to 1280° C. or more. The slab is hot-rolled to obtain a hot-rolled steel sheet. The hot-rolled steel sheet is annealed to obtain an annealed steel sheet. The annealed steel sheet is cold-rolled to obtain a cold-rolled steel sheet. The cold-rolled steel sheet is decarburization annealed to obtain a decarburization annealed steel sheet. The decarburization annealed steel sheet is coiled in a coil state. The coil-state decarburization annealed steel sheet is finish-annealed. The cold-rolled steel sheet is heated to a temperature of 800° C. or more at a rate of 30° C./sec or more and 100° C./sec or less during increasing temperature of the cold-rolled steel sheet in the decarburization annealing or before the decarburization annealing. The decarburization annealed steel sheet is heated at a rate of 20° C./h or less within a temperature range of 750° C. or more and 1150° C.
    Type: Application
    Filed: March 19, 2010
    Publication date: January 19, 2012
    Inventors: Nobusato Morishige, Kenichi Murakami, Hotaka Honma, Yuji Kubo, Kazumi Mizukami, Koki Tanaka, Seiki Takebayashi
  • Publication number: 20110305594
    Abstract: The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.03-2.0% by weight B, 0.5-1.2% by weight C, 70.1-97.3% by weight Fe, 0.1-3.0% by weight Mn and 2.0-10.0% by weight Si. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mould.
    Type: Application
    Filed: October 13, 2009
    Publication date: December 15, 2011
    Inventor: Laszlo Pelsoeczy
  • Patent number: 8071018
    Abstract: A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.03% or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 ?m in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ?Hv (=Hv max?Hv min), in the sheet thickness direction being 10 or smaller.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: December 6, 2011
    Assignee: JFE Steel Corporation
    Inventors: Nobusuke Kariya, Norio Kanamoto, Hidekazu Ookubo, Yoshiharu Kusumoto, Takeshi Fujita
  • Patent number: 8038934
    Abstract: A spring steel having a high strength of 1900 MPa or more and superior in the brittle fracture resistance, as well as a method for manufacturing the same, are provided. The high strength spring steel comprises, as basic components in mass %, C: 0.4-0.6%, Si: 1.4-3.0%, Mn: 0.1-1.0%, Cr: 0.2-2.5%, P: 0.025% or less, S: 0.025% or less, N: 0.006% or less, Al: 0.1% or less, and O: 0.003% or less, the amount of solute C being 0.15% or less, the amount of Cr contained as a Cr-containing precipitate being 0.10% or less, and a TS value represented by the following equation being 24.8% or more, and in point of structure, the pre-austenite grain diameter being 10 ?m or smaller, wherein TS=28.5*[C]+4.9*[Si]+0.5*[Mn]+2.5*[Cr]+1.7*[V]+3.7*[Mo] where [X] stands for mass % of element X.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: October 18, 2011
    Assignee: Kobe Steel, Ltd.
    Inventors: Takuya Kochi, Hiroshi Yaguchi, Wataru Urushihara
  • Patent number: 7993728
    Abstract: A base plate for power module, comprising an aluminum-silicon carbide composite and aluminum layers made of a metal containing aluminum as the main component formed on respective principal planes of the aluminum-silicon carbide composite, wherein the aluminum-silicon carbide composite is produced by forming or fabricating a flat plate-shaped silicon carbide porous body to have a thickness difference of at most 100 ?m in the entire porous body and piling such porous bodies as they are each sandwiched between mold-releasing plates so that the fastening torque in the plane direction becomes from 1 to 20 Nm, and infiltrating a metal containing aluminum as the main component into the silicon carbide porous bodies, wherein the aluminum layers each has an average thickness of from 10 to 150 ?m, the difference between the maximum thickness and the minimum thickness of the aluminum layer in each principal plane is at most 80 ?m, and the difference between average thicknesses of the aluminum layers on the respective pr
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: August 9, 2011
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hideki Hirotsuru, Goh Iwamoto, Hideo Tsukamoto, Satoshi Higuma, Nobuyuki Hashimoto
  • Publication number: 20110097595
    Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg—Si-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.
    Type: Application
    Filed: April 24, 2009
    Publication date: April 28, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi
  • Patent number: 7905966
    Abstract: The invention relates to a method of producing a strip of nanocrystalline material which is obtained from a wound ribbon that is cast in an amorphous state, having atomic composition [Fe1?a?bCoaNib]100?x?y?z??????CuxSiyBzNb?M??M??, M? being at least one of elements V, Cr, Al and Zn, and M? being at least one of elements C, Ge, P, Ga, Sb, In and Be, with: a ?0.07 and b ?0.1, 0.5 ?x ?1.5 and 2 ???5, 10?y?16.9 and 5?z?8, ??2 and ??2. According to the invention, the amorphous ribbon is subjected to crystallization annealing, in which the ribbon undergoes annealing in the unwound state, passing through at least two S-shaped blocks under voltage along an essentially longitudinal axial direction of the ribbon, such that the ribbon is maintained at an annealing temperature of between 530° C. and 700° C. for between 5 and 120 seconds and under axial tensile stress of between 2 and 1000 MPa.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 15, 2011
    Assignee: Imphy Alloys
    Inventors: Thierry Waeckerle, Thierry Save, Alain Demier
  • Publication number: 20110002807
    Abstract: This steel for induction hardening includes: in terms of mass %, C: 0.40% or more to 0.75% or less; Si: 0.002% or more to 3.0% or less; Mn: 0.20% or more to 2.0% or less; S: 0.002% or more to 0.1% or less; Al: more than 0.10% to 3.0% or less; P: 0.030% or less; and N: 0.035% or less, with the remainder being Fe and inevitable impurities.
    Type: Application
    Filed: January 5, 2010
    Publication date: January 6, 2011
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Hajime Saitoh, Toshiharu Aiso, Masayuki Hashimura, Atsushi Mizuno, Manabu Kubota
  • Publication number: 20100284849
    Abstract: An austenitic cast iron according to the present invention has Ni: from 7 to 15% by mass, and is characterized in that it comprises a base structure in which an austenite phase makes a major phase even in ordinary-temperature region by adjusting the respective compositions of Cr, Ni and Cu, excepting C and Si, so as to fall within predetermined ranges. In accordance with the present invention, it is possible to obtain an austenitic cast iron, which is excellent in terms of oxidation resistance and the like, inexpensively, while reducing the content of expensive Ni.
    Type: Application
    Filed: August 29, 2008
    Publication date: November 11, 2010
    Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, MIE PREFECTURE
    Inventors: Tomohei Sugiyama, Manabu Ishikawa, Hiroyuki Isomura, Mamoru Kojima, Naoki Yamamoto, Kyoichi Kinoshita, Takao Fujikawa
  • Publication number: 20100266441
    Abstract: A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.035 or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 ?m in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ?Hv (=Hv max?Hv min), in the sheet thickness direction being 10 or smaller.
    Type: Application
    Filed: June 22, 2010
    Publication date: October 21, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Nobusuke Kariya, Norio Kanamoto, Hidekazu Ookubo, Yoshiharu Kusumoto, Takeshi Fujita
  • Publication number: 20100263771
    Abstract: A heat treatment method of manufacturing high carbon bearing steel having excellent abrasion resistance and fatigue resistance, a steel wire rod for high carbon bearing steel subjected to the heat treatment, a manufacturing method of the steel wire rod, high carbon bearing steel manufactured by the heat treatment and a soaking method of a steel bloom used for manufacturing the steel wire rod. The heat treatment method of bearings includes the steps of: quenching a bearing-shaped steel part containing, by weight, 0.5% to 1.20% carbon and 1.0% to 2.0% silicon; and partitioning the quenched steel part at a temperature ranging from Ms?100° C. to Ms for at least 10 minutes, where Ms represents a temperature at which formation of martensite will start.
    Type: Application
    Filed: December 12, 2008
    Publication date: October 21, 2010
    Applicant: POSCO
    Inventor: Kwan-Ho Kim
  • Publication number: 20100247958
    Abstract: A high-strength cold-rolled steel sheet according to the present invention: satisfies the requirement of a prescribed chemical composition; has a structure comprising a mother phase structure of ferrite and a second phase structure of retained austenite and martensite (the martensite may not be included); and satisfies the following expressions (1) and (2) when the volume fraction of the ferrite in the whole structure is represented by Vf (%), the volume fraction of the retained austenite in the whole structure is represented by V? (%), the carbon content in the retained austenite is represented by C? (mass %), the shortest distance between the second phase structures is represented by dis (?m), and the average grain size of the second phase structures is represented by dia (?m), (Vf×V?×C?×dis)/dia?300??(1), dis?1.0 ?m??(2).
    Type: Application
    Filed: March 5, 2010
    Publication date: September 30, 2010
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Michitaka TSUNEZAWA, Yuichi Futamura, Masaaki Miura
  • Patent number: 7799147
    Abstract: The performance index ??×Q of a magnetic core member, in which an Fe—Si—Cr alloy is used, is further improved. A flaky soft magnetic metal powder, which is used in a magnetic core member for an RFID antenna comprising the above flaky soft magnetic metal powder and a binder, wherein it is composed of an Fe—Si—Cr alloy having an Ms (saturation magnetization)/Hc (coercive force) of 0.8 to 1.5 (mT/Am?1) in an applied magnetic field of 398 kA/m. In the present invention, it is preferable that the flaky soft magnetic metal powder consists of 7 to 23 at % of Si, 15 at % or less of Cr (excluding 0), and the balance being Fe and inevitable impurities, and that it has a weight-average particle size D50 of 5 to 30 ?m and an average thickness of 0.1 to 1 ?m.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: September 21, 2010
    Assignee: TDK Corporation
    Inventors: Atsuhito Matsukawa, Katsuhiko Wakayama, Yoshihito Hirai
  • Publication number: 20100230010
    Abstract: Disclosed are a thin strip of an amorphous alloy having excellent workability, a nanocrystalline soft magnetic alloy which can stably provide good magnetic properties, and a magnetic core using the nanocrystalline soft magnetic alloy. The thin strip of an amorphous alloy is characterized in that the thin strip is formed of an alloy having a composition represented by Fe10-a-b-c-dMaSibBcCud (atomic %), wherein 0?a?10, 0?b?20, 4?c?20, 0.1?d?3, and 9?a+b+c?35, and containing unavoidable impurities, and, in the composition, M represents at least one element selected from Ti, V, Zr, Nb, Mo, Hf, Ta, and W, a Cu segregated part is present, on the surface side of the thin strip of the amorphous alloy, in which Cu is segregated at a higher concentration than the Cu concentration in the outermost surface part of the thin strip of the amorphous alloy, and the highest Cu concentration in the Cu segregated part is not more than 4 atomic %.
    Type: Application
    Filed: March 30, 2009
    Publication date: September 16, 2010
    Inventors: Yoshihito Yoshizawa, Motoki Ohta
  • Publication number: 20100227180
    Abstract: A spraying material for coating a metallic member, being inexpensive and having superior corrosion and erosion resistance even in high temperature environments, wherein the material is composed of an Fe—Si based compound and comprises an alloy composed of 10 to 35% by weight of Si and the remainder of Fe and inevitable impurities, and further, up to 5% by weight of B may be added to the material in terms of improvement in hardness and adhesiveness of the coating is provided in order to protect components such as heaters and water walls of coal fired boilers and heat exchanger tubes of fluidized bed boilers, etc., from corrosion and erosion. The spraying material is formed into a coating by, for example, high velocity flame spraying or atmospheric plasma spraying.
    Type: Application
    Filed: March 5, 2009
    Publication date: September 9, 2010
    Applicant: BABCOCK-HITACHI KABUSHIKI KAISHA
    Inventors: Toshinari OKAGAITO, Yuji FUKUDA, Yoshitaka KOJIMA
  • Publication number: 20100221138
    Abstract: The present invention provides a high-strength composite steel sheet which has a tensile strength of 980 MPa class as well as excellent and excellent anti-delayed fraction property, and also has excellent spot-weldability. The high-strength composite steel sheet comprises a steel satisfying: C: 0.10 to 0.25% (% by mass in case of a chemical component, the same shall apply hereinafter), Si: 1.0 to 3.0%, Mn: 1.5 to 3.0%, P: 0.15% or less, S: 0.02% or less, Al: 0.4% or less, and comprising the remnant made from iron and unavoidable impurities; the contents of Si, Al, Mn and Cr satisfy the relationship of “(Si+Al)/Mn or (Si+Al)/(Mn+Cr)=0.74 to 1.26”; and microstructure is specified.
    Type: Application
    Filed: June 4, 2007
    Publication date: September 2, 2010
    Applicants: Kabushiki Kaisha Kobe Seiko Sho, Shinshu TLO Co., Ltd.
    Inventors: Michiharu Nakaya, Yoichi Mukai, Koichi Sugimoto
  • Publication number: 20100201469
    Abstract: A soft magnetic alloy including iron, cobalt, and at least one alloying addition including a platinum group metal, rhenium, or combinations thereof is provided. A device which is formed from such an alloy is also described.
    Type: Application
    Filed: February 23, 2010
    Publication date: August 12, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Luana Emiliana Iorio, Michael Francis Xavier Gigliotti, Pazhayannur Ramanathan Subramanian, Francis Johnson, Israel Samson Jacobs