Pipe Or Tube Patents (Class 148/519)
  • Patent number: 11179763
    Abstract: A method to improve the collapse resistance of metallic tubular products is disclosed. Stress is applied to the metallic tubular products in order to change the residual stress profile of the metallic tubular products, such as those that have completed a straightening process, resulting in a residual stress profile that improves collapse resistance. The metallic tubular product is subjected to radial compression processing to control the residual stress profile and to enhance collapse resistance. The radial compression process may be applied after the tubular product has been subjected to a straightening process.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: November 23, 2021
    Assignee: United States Steel Corporation
    Inventors: Peter W. Moore, Bisen Lin
  • Patent number: 11090006
    Abstract: A sensing guidewire device used to measure physiological parameters within a living body. In one embodiment, the device is used to measure the fractional flow reserve (FFR) across a stenotic lesion in a patient's vasculature. The device includes a sensor that is adapted to be affixed near the distal end of a guidewire. The guidewire contains a corewire, processed to enclose electrical conductors in a sealed, off-centered interstice or channel, with an outer diameter approximate to the outer diameter of the device, running substantially the full length of the device, and has a homogenous outer surface. The enclosed eccentric channel provides space for electrical conductors to move freely. The corewire can have a tapered segment to create desirable flexibility. A solid connector comprised of alternating conductive and insulating elements for connecting the conductors to an external device is disclosed.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: August 17, 2021
    Assignee: CORMETRICS LLC
    Inventors: Eugene J Jung, Jr., Reza S Mohammadpour, Subbakrishna Shankar, Mohamed Lababidi
  • Patent number: 11059344
    Abstract: A stabilizer includes bend sections. With respect to positions in a circumferential direction of a radial cross section of each of the bend sections, a center of an inside of a bend is defined as 0°, and a center of an outside of the bend is defined as 180°. The bend sections each include a bend interior section located at 0°, a bend exterior section located at 180°, a first side section located at 90°, and a second side section located at 270°. The bend interior section has compressive residual stress from a surface to a first depth. The bend exterior section has compressive residual stress to a second depth. The first side section has compressive residual stress to a third depth. The second side section has compressive residual stress to a fourth depth.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: July 13, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yasuharu Sakurai, Yoshihiro Koshita, Akihiko Nishikawa, Akifumi Otani
  • Patent number: 11053564
    Abstract: A high-strength high-toughness electric-resistance-welded steel pipe having high resistance to post-weld heat treatment is provided. The steel pipe having a composition including C: 0.01% to 0.12%, Si: 0.05% to 0.50%, Mn: 1.0% to 2.2%, P: 0.03% or less, S: 0.005% or less, Al: 0.001% to 0.10%, N: 0.006% or less, Nb: 0.010% to 0.100%, and Ti: 0.001% to 0.050%. The steel pipe having a structure composed of a 90% or more by volume of a bainitic ferrite phase as a main phase and 10% or less (including 0%) by volume of a second phase. The bainitic ferrite phase having an average grain size of 10 ?m or less, and the structure containing fine Nb precipitates having a particle size of less than 20 nm dispersed in a base material portion. The steel pipe having high strength, toughness, and high resistance that is maintained through post-weld heat treatment.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 6, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Sota Goto, Takatoshi Okabe, Yukihiko Okazaki
  • Patent number: 11041223
    Abstract: A high-strength high-toughness electric-resistance-welded steel pipe having high resistance to post-weld heat treatment is provided. The steel pipe having a composition including C: 0.01% to 0.12%, Si: 0.05% to 0.50%, Mn: 1.0% to 2.2%, P: 0.03% or less, S: 0.005% or less, Al: 0.001% to 0.10%, N: 0.006% or less, Nb: 0.010% to 0.100%, and Ti: 0.001% to 0.050%. The steel pipe having a structure composed of 90% or more by volume of a bainitic ferrite phase and 10% or less (including 0%) by volume of a second phase. The bainitic ferrite phase having an average grain size of 10 ?m or less, and the structure containing fine Nb precipitates having a particle size of less than 20 nm dispersed in a base material portion. The steel pipe having high strength and toughness that is maintained through post-weld heat treatment, including heating to a temperature of 600° C. or more.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: June 22, 2021
    Assignee: JFE STEEL CORPORATION
    Inventors: Sota Goto, Takatoshi Okabe, Yukihiko Okazaki
  • Patent number: 10888916
    Abstract: This torsion beam manufacturing method is a method for manufacturing a torsion beam which is provided with a uniformly shaped closed cross-sectional portion in which a cross section orthogonal to a longitudinal direction is a closed cross section having a substantial V-shape or a substantial U-shape with a pair of ear portions, and a shape changing portion which leads to the uniformly shaped closed cross-sectional portion and in which a shape of the closed cross section changes progressively away from the uniformly shaped closed cross-sectional portion, the torsion beam manufacturing method comprising: thickening to form a pair of thickened portions in at least the shape changing portion by pressurizing each of the pair of ear portions from outside against swelling of the pair of ear portions in a slate where both outer surfaces of each of the pair of ear portions are supported.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: January 12, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Keinosuke Iguchi, Masaaki Mizumura
  • Patent number: 10468292
    Abstract: A shutter disk suitable for shield a substrate support in a physical vapor deposition chamber is provided. In one embodiment, the shutter disk includes a disk-shaped body having an outer diameter disposed between a top surface and a bottom surface. The disk-shape body includes a double step connecting the bottom surface to the outer diameter.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: November 5, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Karl M. Brown, Jason Schaller
  • Patent number: 10258763
    Abstract: A method of manufacturing a catheter shaft includes extruding an inner polymeric layer having a main lumen and two or more side lumens spaced about the main lumen; forming an outer polymeric layer about the inner polymeric layer; and inserting at least one elongate member, such as a wire, through each side lumen of the inner polymeric layer. The side lumens are less than about ? the size of the main lumen. The method may further include the step of forming a braided layer between the inner polymeric layer and the outer polymeric layer. In an alternate embodiment, the method includes co-extruding an inner polymeric layer and a multi-lumen layer, the multi-lumen layer having two or more side lumens; forming an outer polymeric layer about the multi-lumen layer; and inserting at least one elongate member through each side lumen. Catheter assemblies made according to the described methods are also disclosed.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: April 16, 2019
    Assignee: St. Jude Medical, Atrial Fibrillation, Inc.
    Inventors: Martin Maitre Grasse, James V. Kauphusman
  • Patent number: 9833824
    Abstract: The method consists of subjecting a coarse-grained titanium semi-product (1) with the pure titanium content of at least 99 wt % to a plastic deformation. In said plastic deformation the transverse cross-section surface area of the titanium semi-product is reduced by hydrostatic extrusion in which the titanium semi-product is the billet (1) extruded through the die (4). The reduction (R) of the transverse cross-section of the titanium billet (1) is realized in at least three but not more than five consecutive hydrostatic extrusion passes at the initial temperature of the billet (1) not above 50° C. and the extrusion velocity not above 50 cm/s. Prior to each hydrostatic extrusion pass, the titanium billet is covered with a friction-reducing agent. During the first hydrostatic extrusion pass, the reduction of the transverse cross-section surface area of the titanium semi-product is at least four, whereas during the second and third hydrostatic extrusion pass it is at least two and a half.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: December 5, 2017
    Assignee: INSTYTUT WYSOKICH CIŚNIEŃ POLSKIEJ AKADEMII NAUK
    Inventors: Waclaw Pachla, Mariusz Kulczyk, Konrad Wojciechowski
  • Patent number: 9034125
    Abstract: A method for manufacturing an Ni base alloy pipe stock comprises piercing and rolling a billet by use of Mannesmann piercing and rolling mill. The pipe stock has controlled amounts of C, Si, Mn, P, S, Cr, Ni, Mo, W, Cu, Al, N, with the balance being Fe. With the method, the following equations are satisfied, wherein values of TGBm, Psr and P? represented by the following equations (1) to (3) being not more than 1300, not more than 200 and not less than 0, respectively TGBm=1380?5000P?100S?4400C??(1), PsrNi+10(Mo+0.5W)+100N??(2), P?=(Ni?50)+10(N?0.1)?2(Cr?25)?5(Mo+0.5W?6)+12??(3), wherein each element symbol in the equations represents mass % of the element concerned.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: May 19, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masaaki Igarashi, Kazuhiro Shimoda, Tomio Yamakawa, Hisashi Amaya Amaya
  • Publication number: 20150122376
    Abstract: The present invention published a large walled field conditions P92 long pipeline local heat treatment processes. Firstly, according to the specific conditions for the on-site grade heat-resistant steel (P92 pipe), combining of the finite element method and test, the Heated Band (HB) width and Gradient Control Band (GCB) was calculated. The pipe was then locally heated using the flexible ceramic resistive heater. When the temperature reaches 80-100° C., the pipe was heated to constant temperature at 80-100° C. for 2 h. The pipe was heated to 300° C. at the rate of 150° C./h. When the temperature reaches 300° C., rising the temperature to 765° C. at the rate of 80° C./h. Holding time is calculated by the wall thickness (5 min/mm, no less than 4 h). Lowering the temperature to 300° C. at the rate of 100° C./h and then natural cooling to room temperature, finally removing the heating device. Finally, the local heat treatment process can be obtained.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 7, 2015
    Applicant: Tianjin University
    Inventor: Yingjin YUAN
  • Patent number: 9005520
    Abstract: The invention concerns steels having excellent resistance over time, in a corrosive atmosphere due to oxidizing environments such as, for example, fumes or water vapor, under high pressure and/or temperature. The invention concerns a steel composition for special applications, said composition containing, by weight, about 1.8 to 11% of chromium (and preferably between about 2.3 and 10% of chromium), less than 1% of silicon, and between 0.20 and 0.45% of manganese. It has been found that it is possible to adjust the contents of the composition based on a predetermined model, selected to obtain substantially optimal properties with respect to corrosion in specific conditions of high temperature performances. Said model can involve as additive of as residue at least one element selected among molybdenum, tungsten, cobalt, and nickel.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: April 14, 2015
    Assignees: V & M France
    Inventors: Jean Leyer, Bruno Vandenberghe, Viviane Lepingle, Ghislain Louis, Annie Fouquet, Catheline Petelot, Emilie Petelot, Adeline Petelot
  • Patent number: 8999082
    Abstract: A method for producing superheater tubes and connecting pipes and assembling superheater tubes inside a steam generator tube wall includes preparing tubes composed of precipitation-hardened nickel-based alloys in a solution-annealed state for the straight tubes, the bends, and the connecting pipes in a workshop and preparing sleeves composed of a material that is not to be heat treated in a shop. The bends and the connecting pipes are manufactured in the workshop using bending tools. The superheater tubes are manufactured in the workshop by connecting the straight tubes and the bends with weld seams, and connecting the sleeves with the connecting pipes with weld seams. The superheater tubes and the connecting pipes having sleeves are precipitation hardened in the workshop in a first heating device. The superheater tubes are connected with the connecting pipes on the assembly site inside the steam generator tube walls with a weld seam and the sleeves are connected with the take-up device with a weld seam.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: April 7, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Ruben Hartwig, Andreas Helmrich, Daniel Mutter, Alois Schalk
  • Patent number: 8974610
    Abstract: A high-strength welded steel pipe is obtained by welding a seam weld portion of a steel plate that are formed in a pipe shape. In the high-strength welded steel pipe, a base metal of the steel plate includes, by mass %, C: 0.010% to 0.080%, Si: 0.01% to 0.50%, Mn: 0.50% to 2.00%, S: 0.0001% to 0.0050%, Ti: 0.003% to 0.030%, Mo: 0.05% to 1.00%, B: 0.0003% to 0.0100%, O: 0.0001% to 0.0080%, N: 0.006% to 0.0118%, P: limited to 0.050% or less, Al: limited to 0.008% or less, and the balance of Fe and inevitable impurities, Ceq is 0.30 to 0.53, Pcm is 0.10 to 0.20, [N]?[Ti]/3.4 is less than 0.003, the average grain size of the prior ? grains in heat affected zones in the steel plate is 250 ?m or less, and the prior ? grains include bainite and intragranular bainite.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: March 10, 2015
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Taishi Fujishiro, Takuya Hara, Yoshio Terada, Shinya Sakamoto, Hitoshi Asahi
  • Publication number: 20150059912
    Abstract: A steel plate has a chemical composition containing, by mass %, C: 0.03% or more and 0.08% or less, Si: 0.01% or more and 1.0% or less, Mn: 1.2% or more and 3.0% or less, P: 0.015% or less, S: 0.005% or less, Al: 0.08% or less, Nb: 0.005% or more and 0.07% or less, Ti: 0.005% or more and 0.025% or less, N: 0.010% or less, O: 0.005% or less and the balance being Fe and inevitable impurities, a metallographic structure including a bainite phase and island martensite, and a polygonal ferrite in surface portions within 5 mm from the upper and lower surfaces, wherein the area fraction of the island martensite is 3% to 15%, the equivalent circle diameter of the island martensite is 3.0 ?m or less, the area fraction of the polygonal ferrite in the surface portions is 10% to less than 80%.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 5, 2015
    Inventors: Junji Shimamura, Kimihiro Nishimura
  • Publication number: 20150060035
    Abstract: A heat transfer tube includes: a tube body made of an extruded material of an aluminum alloy having a composition including: 0.3 mass % or more and less than 0.8 mass % of Mn; more than 0.1 mass % and less than 0.32 mass % of Si; 0.3 mass % or less of Fe; 0.06 mass % or more and 0.3 mass % or less of Ti; and Al balance including inevitable impurities, a ratio of a Mn content to a Si content, Mn %/Si %, exceeding 2.5; and a Zn-containing layer provided to an outer surface of the tube body.
    Type: Application
    Filed: March 25, 2013
    Publication date: March 5, 2015
    Applicant: Mitsubishi Aluminum Co., Ltd.
    Inventors: Hiroki Furumura, Yasunori Hyogo
  • Patent number: 8920583
    Abstract: The invention provides a steel pipe excellent in deformation characteristics, most notably a steel pipe for expandable-pipe oil well and a low-yield-ratio line pipe, and a method of producing the same without conducting water cooling requiring large-scale heat treatment equipment, namely a method of producing a steel pipe excellent in deformation characteristics whose microstructure is a two-phase structure including a martensite-austenite constituent at an area fraction of 2 to 10% and a soft phase, which method comprises: heating at Ac1+10° C. to Ac1+60° C. and thereafter cooling a precursor steel pipe which contains, in mass %, C: 0.04 to 0.10% and Mn: 1.00 to 2.50%, is limited to Si: 0.80% or less, P: 0.03% or less, S: 0.01% or less, Al: 0.10% or less and N: 0.01% or less, further contains one or more of Ni: 1.00% or less, Mo: 0.60% or less, Cr: 1.00% or less and Cu: 1.00% or less, where content of Mn and content of one or more of Cr, Ni, Mo and Cu satisfy Mn+Cr+Ni+2Mo+Cu?2.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: December 30, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Hitoshi Asahi, Tetsuo Ishitsuka, Motofumi Koyuba, Toshiyuki Ogata
  • Patent number: 8910409
    Abstract: A method of producing autofrettage in a tubular component provides a tubular workpiece having an inner diameter and an outer diameter and provides at least two rollers having a displacement from one another in an axial direction with respect to the workpiece. The method places the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel. The method also compresses the outer diameter of the workpiece with the rollers at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress to the inner diameter of the workpiece.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: December 16, 2014
    Assignee: ATI Properties, Inc.
    Inventor: Matthew V. Fonte
  • Patent number: 8871039
    Abstract: The present invention provides a thick welded steel pipe excellent in low temperature toughness in which contents of Mn and Mo satisfy (Expression 1) below, Pcm obtained by (Expression 2) below is 0.16 to 0.19, and a metal structure of a base material steel plate consists of ferrite being 30 to 95% in an area ratio and a low temperature transformation structure, and in a metal structure of a coarse-grained HAZ, an area ratio of grain boundary ferrite is 1.5% or more, the total area ratio of the grain boundary ferrite and intragranular ferrite is not less than 11% nor more than 90%, an area ratio of MA is 10% or less, and its balance is composed of bainite. 1.2325?(0.85×[Mn]?[Mo])?1.5215??(Expression 1) and Pcm=[C]+[Si]/30+([Mn]+[Cu]+[Cr])/20+[Ni]/60+[Mo]/15+[V]/10??(Expression 2).
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: October 28, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yasuhiro Shinohara, Takuya Hara, Naoki Doi, Eiichi Yamashita
  • Patent number: 8852367
    Abstract: A method of production of high-strength hollow bodies from multiphase martensitic steels includes a heating process, a forming process and a cooling process. A heating device heats hollow steel stock to the austenitic temperature of the material from which the stock is made. The stock is then converted by deformation in a forming device into a hollow body having the final shape. A cooling device thereafter cools the hollow body such that the material with the original austenite microstructure refined by deformation during the forming process cools to a temperature at which incomplete transformation of austenite to martensite occurs. The retained austenite stabilization is performed in an annealing device by diffusion-based carbon partitioning within the material from which the hollow body is made. The hollow body is cooled in a cooling device to ambient temperature after stabilization.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: October 7, 2014
    Assignee: Zapadoceska Univerzita v Plzni
    Inventors: Bohuslav Ma{hacek over (s)}ek, Hana Jirková, Pavel Hronek, Ctibor {hacek over (S)}tádler, Miroslav Urbánek
  • Patent number: 8784581
    Abstract: An Fe—Ni alloy pipe stock containing, by mass %, C?0.04%, Si?0.50%, Mn: 0.01 to 6.0%, P?0.03%, S?0.01%, Cr: 20 to 30%, Ni: 30 to 45%, Mo: 0 to 10%, W: 0 to 20%, with Mo(%)+0.5W(%): more than 1.5% to not more than 10%, Cu: 0.01 to 1.5%, Al?0.01% and N: 0.0005 to 0.20%, and the balance being Fe, with 1440?6000P?100S?2000C?1300, Ni+10(Mo+0.5W)+100N?120, (Ni?35)+10(N?0.1)?2(Cr?25)?5(Mo+0.5W?3)+8?0, can be manufactured into a seamless pipe by use of a Mannesmann piercing and rolling mill because of its excellent inner surface properties. The resulting seamless pipe has excellent mechanical properties and moreover has excellent corrosion resistance in a sour gas environment.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: July 22, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Masaaki Igarashi, Kazuhiro Shimoda, Tomio Yamakawa, Hisashi Amaya
  • Publication number: 20140147600
    Abstract: An apparatus and method of coating and/or lining of the interior of pipes and tubular goods with a performance enhancing layer of metal alloy using a 360° radiant heat source. The use of the disclosed apparatus and methods facilitates the capability to metallurgically bond a layer of metal alloy or composite material to the interior of a steel pipe or similar metal based tubular good with a primary diameter ranging typically from 1.5? to 8?. The disclosed apparatus and methods are especially useful to produce piping used in the conveyance and/or transportation of hot, corrosive and/or abrasive fluids in the oil and gas, and mining Industries.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 29, 2014
    Inventors: John Dennis Neukirchen, Mladen Bumbulovic
  • Patent number: 8728386
    Abstract: A method and apparatus for annealing cylindrical cases for ammunition cartridges or other tubular casings is provided. In one embodiment, a case annealing apparatus is provided. The case annealing apparatus includes a base, a feeding device having a first end tapering to a second end that is coupled to the base, a rotatable feed wheel assembly disposed adjacent a second end of the feeding device, a linear slide mechanism disposed adjacent the rotatable feed wheel assembly defining a portion of a case receiving region, and a heating device disposed adjacent the case receiving region, the heating device operable to heat a portion of a case retained in the case receiving region.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: May 20, 2014
    Assignee: Giraud Tool Company, Inc.
    Inventors: Douglas Hilton Giraud, David Bland Alden
  • Patent number: 8685182
    Abstract: This high-strength steel pipe includes, by mass %, C: 0.02% to 0.09%, Mn: 0.4% to 2.5%, Cr: 0.1% to 1.0%, Ti: 0.005% to 0.03%, Nb: 0.005% to 0.3%, and a balance consisting of Fe and inevitable impurities, in which Si, Al, P, S, and N are limited to 0.6% or less, 0.1% or less, 0.02% or less, 0.005% or less, 0.008% or less, respectively, the bainite transformation index BT is 650° C. or less, and the microstructure thereof is a single bainite microstructure including first bainite and second bainite, the first bainite being a gathered microstructure of bainitic ferrite including no carbide, and the second bainite being a mixed microstructure of bainitic ferrite including no carbide and cementite between the bainitic ferrites.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: April 1, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kensuke Nagai, Yasuhiro Shinohara, Shinya Sakamoto, Takuya Hara, Hitoshi Asahi
  • Patent number: 8671609
    Abstract: A method of producing a superalloy gun barrel includes providing a tubular workpiece made of a cobalt-based superalloy material, the workpiece having at least about 30% by weight of fcc phase and having an inner diameter and an outer diameter. The method further includes placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel and compressing the outer diameter of the workpiece at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress to the inner diameter of the workpiece.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: March 18, 2014
    Assignee: Dynamic Flowform Corp.
    Inventor: Matthew V. Fonte
  • Patent number: 8636856
    Abstract: Embodiments of the present disclosure comprise carbon steels and methods of manufacture. In one embodiment, quenching and tempering procedure is performed in which a selected steel composition is formed and heat treated to yield a slightly tempered microstructure having a fine carbide distribution. In another embodiment, a double austenizing procedure is disclosed in which a selected steel composition is formed and subjected to heat treatment to refine the steel microstructure. In one embodiment, the heat treatment may comprise austenizing and quenching the formed steel composition a selected number of times (e.g., 2) prior to tempering. In another embodiment, the heat treatment may comprise subjecting the formed steel composition to austenizing, quenching, and tempering a selected number of times (e.g., 2). Steel products formed from embodiments of the steel composition in this manner (e.g., seamless tubular bars and pipes) will possess high yield strength, e.g.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: January 28, 2014
    Assignee: Siderca S.A.I.C.
    Inventors: Eduardo Altschuler, Teresa Perez, Edgardo Lopez, Constantino Espinosa, Gonzalo Gomez
  • Patent number: 8608871
    Abstract: There is provided a high-strength steel tube having excellent chemical conversion treatability and excellent formability and a method for manufacturing the high-strength steel tube. More specifically, in processing a mother steel sheet containing, on the basis of mass percent, 0.05% or more C, more than 0.7% Si, and 0.8% or more Mn into a pipe shape, the sum total of absolute circumferential surface strains each applied in individual process steps of the processing is 5% or more as nominal strain. A welded steel tube thus manufactured using a steel sheet even containing more than 0.7% Si can have excellent chemical conversion treatability without mechanical grinding or chemical pickling treatment.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: December 17, 2013
    Assignees: JFE Steel Corporation, Honda Motor Co., Ltd.
    Inventors: Yasuhide Ishiguro, Akio Sato, Yasuhisa Shimizu
  • Patent number: 8585835
    Abstract: A high-strength steel machined product giving excellent hardenability has a metal microstructure with excellent balance of strength and toughness and high stability of retained austenite. The product is composed of an ultra-high low-alloy TRIP steel having a metal microstructure which contains an appropriate quantity of two or more of Cr, Mo, and Ni, and an appropriate quantity of one or more of Nb, Ti, and V, and having an appropriate value of carbon equivalent; the metal microstructure has a mother-phase structure composed mainly of lathy bainitic ferrite with a small amount of granular bainitic ferrite and polygonal ferrite, and has a secondary-phase structure composed of fine retained austenite and martensite.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: November 19, 2013
    Assignees: Usui Kokusai Sangyo Kaisha Limited, Shinshu University
    Inventors: Koh-ichi Sugimoto, Sho-hei Sato, Teruhisa Takahashi, Goro Arai
  • Publication number: 20130264123
    Abstract: Embodiments of the present disclosure are directed to methods of manufacturing steel tubes that can be used for mining exploration, and rods made by the same. Embodiments of the methods include a quenching of steel tubes from an austenitic temperature prior to a cold drawing, thereby increasing mechanical properties within the steel tube, such as yield strength, impact toughness, hardness, and abrasion resistance. Embodiments of the methods reduce the manufacturing step of quenching and tempering ends of a steel tube to compensate for wall thinning during threading operations. Embodiments of the methods also tighten dimensional tolerances and reduce residual stresses within steel tubes.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 10, 2013
    Applicant: Tenaris Connections Limited
    Inventors: Eduardo Altschuler, Pablo Egger
  • Patent number: 8479549
    Abstract: A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process. The metal forming process includes radial forging, rolling, pilgering, and/or flowforming.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: July 9, 2013
    Assignee: Dynamic Flowform Corp.
    Inventor: Matthew V. Fonte
  • Patent number: 8414715
    Abstract: Embodiments of the present disclosure comprise carbon steels and methods of manufacture. In one embodiment, a double austenizing procedure is disclosed in which a selected steel composition is formed and subjected to heat treatment to refine the steel microstructure. In one embodiment, the heat treatment may comprise austenizing and quenching the formed steel composition a selected number of times (e.g., 2) prior to tempering. In another embodiment, the heat treatment may comprise subjecting the formed steel composition to austenizing, quenching, and tempering a selected number of times (e.g., 2). Steel products formed from embodiments of the steel composition in this manner (e.g., seamless tubular bars and pipes) will possess high yield strength, at least about 175 ksi (about 1200 MPa) while maintaining good toughness.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: April 9, 2013
    Assignee: Siderca S.A.I.C.
    Inventors: Eduardo Altschuler, Teresa Perez, Edgardo Lopez, Constantino Espinosa, Gonzalo Gomez
  • Patent number: 8362393
    Abstract: An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When an outer-circumferential surface of a welded portion of a cylindrical tubular body (2) is irradiated with a laser beam that circles around an outer circumference of the tubular body (2), a heating width W in a circumferential direction heated by the laser-beam irradiation and a laser-beam moving speed V in the circumferential direction are set so that a stress in the circumferential direction in an inner surface of the tubular body (2) produced by the heating with the laser beam is at least larger than a yielding stress of a material that the tubular body (2) is made of.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: January 29, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Takahiro Ota, Shuho Tsubota, Takashi Ishide, Kazuhiko Kamo, Noriaki Sugimoto, Yoshiyuki Hemmi, Hironori Onitsuka, Takashi Akaba
  • Patent number: 8350176
    Abstract: A method of providing boiler tubes with a variably ribbed interior surface. A suitably dimensioned spindle with a channel having a desired pattern on the exterior surface of the spindle is wrapped by a wire-like member in the channel so as to form thereon a reverse image of the desired, patterned tube ribbing. A brazing metal paste is applied on the exterior surface of the wire-like member and the spindle is inserted into a tube to be ribbed. The wire-like member is released from the spindle to allow the wire-like member to conform to the inner surface of the tube, and the tube is heated to the melting temperature of the brazing metal paste so that the wire-like member bonds to the inner surface of the tube, and the metal tube is then cooled.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: January 8, 2013
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Walter R. Mohn, George B. Watson, John Hainsworth, James M. Tanzosh, Douglas D. Zeigler
  • Patent number: 8328957
    Abstract: In an electric resistance welded steel pipe with excellent weld toughness for a line pipe, the area fraction of minute defects each having a maximum length of less than 50 ?m in a projection plane of an electric resistance welded seam is in the range of 0.000006 to 0.026, and the absorbed energy at ?40° C. measured by a method for an impact test of metallic materials is 315 J or more.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: December 11, 2012
    Assignee: JFE Steel Corporation
    Inventors: Hiroyasu Yokoyama, Kazuhito Kenmochi, Takatoshi Okabe, Yukinori Iizuka
  • Patent number: 8293037
    Abstract: A method for producing a duplex stainless steel pipe having a minimum yield strength of 758.3 to 965.2 MPa, comprises first hot working and optionally solution heat treating a duplex stainless steel material pipe having a chemical composition consisting, by mass %, of C: 0.03% or less, Si: 1% or less, Mn: 0.1 to 4%, Cr: 20 to 35%, Ni: 3 to 10%, Mo: 0 to 6%, W: 0 to 6%, Cu: 0 to 3% and N: 0.15 to 0.60%, the balance being Fe and impurities. The pipe is then cold rolled under conditions that the working ratio Rd, in terms of the reduction of area, in the final cold rolling step falls within a range from 10 to 80%, and formula (1) is satisfied: Rd=exp[{In(MYS)?In(14.5×Cr+48.3×Mo+20.7×W+6.9×N)}/0.195]??(1) wherein Rd is a reduction in area %, MYS is the targeted yield strength (MPa), and Cr, Mo, W and N are in mass %.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: October 23, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hitoshi Suwabe, Toshihide Ono
  • Patent number: 8221562
    Abstract: A method for casting medium carbon, B/Ti steel product using compact strip processing or thin slab casting. The method can include providing a steel composition including boron and titanium and casting the steel composition into a slab having a thickness between about 25 and 150 mm. The slab can have a cast composition including about 0.23 to 0.30 wt. % carbon, about 0.0010 to 0.0050 wt. % boron, about 0.010 to 0.050 wt. % titanium, about 1.15 to 1.50 wt. % manganese, less than 0.35 wt. % silicon and a Ti/N ratio greater than 2.9. The amount of each element is provided based upon the total weight of the steel composition. The steel slab can be free from cracks and significant defects. Furthermore, the steel slab can be used for electric resistance welded (ERW) products.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 17, 2012
    Assignees: Maverick Tube, LLC, Ternium Mexico, S.A. de C.V.
    Inventors: Martín Emiliano Valdez, Fernando Augusto Actis, Gerardo Puente Sireno, Marco Antonio Herrera García
  • Publication number: 20120125490
    Abstract: A steel composition and method from making a dual phase steel therefrom. The dual phase steel may have carbon of about 0.05% by weight to about 0.12 wt %; niobium of about 0.005 wt % to about 0.03 wt %; titanium of about 0.005 wt % to about 0.02 wt %; nitrogen of about 0.001 wt % to about 0.01 wt %; silicon of about 0.01 wt % to about 0.5 wt %; manganese of about 0.5 wt % to about 2.0 wt %; and a total of molybdenum, chromium, vanadium and copper less than about 0.15 wt %. The steel may have a first phase consisting of ferrite and a second phase having one or more of carbide, pearlite, martensite, lower bainite, granular bainite, upper bainite, and degenerate upper bainite. A solute carbon content in the first phase may be about 0.01 wt % or less.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Inventors: Jayoung Koo, Swarupa Bangaru, Hyun-Woo Jin, Adnan Ozekcin, Raghavan Ayer, Douglas P. Fairchild, Danny L. Beeson, Douglas S. Hoyt, James B. LeBleu, JR., Shigeru Endo, Mitsuhiro Okatsu, Shinichi Kakihara, Moriyasu Nagae
  • Publication number: 20120018028
    Abstract: An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19?Pcm?0.25, the balance being Fe and unavoidable impurities, and has a TS of 760 to 930 MPa, a uniform elongation of 5% or more, and a YR of 85% or less; the seam weld metal has a specific composition.
    Type: Application
    Filed: February 5, 2010
    Publication date: January 26, 2012
    Applicant: JFE STEEL CORPORATION
    Inventors: Junji Shimamura, Nobuyuki Ishikawa, Mitsuhiro Okatsu, Nobuo Shikanai
  • Publication number: 20120006479
    Abstract: A rapid exchange balloon catheter having a proximal end and a distal end, the catheter including a tubular metal shaft body extending from the proximal end along a majority of the total length and having an inflation lumen arranged therein, a plastics distal end portion bonded to the metal body in extension thereof, the distal end portion being provided with an inflation lumen in communication with a balloon, and a guide wire lumen, the guide wire lumen extending from a proximal side port to a distal end opening. To reduce the resistance to kinking, the metal body includes a transitional region having reduced stiffness at the position of bonding to the plastics distal end portion compared to a more proximal position along the metal body.
    Type: Application
    Filed: September 22, 2011
    Publication date: January 12, 2012
    Applicant: Cook Medical Technologies LLC
    Inventors: Palle M. Hansen, Steen Aggerholm
  • Patent number: 8080116
    Abstract: The invention relates to a cooling element, particularly for use in walls of furnaces that are subjected to high levels of thermal stress, and to a method for producing a cooling element. The cooling element is comprised of cast copper or of a low-alloyed copper alloy and is provided with coolant channels, which consist of tubes cast inside the copper or the copper alloy and which are placed inside the cooling element. In order to create a cooling element with an improved material bond on the contact surfaces between the cooling tube and the metal cast around it and thus with an increased heat transfer, the invention provides that the tubes of the coolant channels are provided with an electrolytic coating on the exterior thereof. The use of copper tubes has been shown to be particularly advantageous, and the coating of the tube exteriors thereof ensues in an electroplating bath.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: December 20, 2011
    Assignee: Hundt & Weber GmbH
    Inventors: Karlfried Pfeifenbring, Marcus Hering, Peter H. Müller
  • Publication number: 20110253265
    Abstract: Provided is a steel pipe suitable for machine structure members that are required to be lightweight, of which the strength is increased and the fatigue life is prolonged with preventing the increase in the material cost and the production cost. The steel pipe is a high fatigue life quenched/tempered steel pipe having a composition comprising, % by mass, C: 0.1 to 0.4%, Si: 0.5 to 1.5%, Mn: 0.3 to 2%, P: at most 0.02%, S: at most 0.01%, Cr: 0.1 to 2%, Ti: 0.01 to 0.1%, Nb: 0.01 to 0.1%, Al: at most 0.1%, B: 0.0005 to 0.01%, N: at most 0.01%, and optionally at least one of Ni: at most 0.5%, Ca: at most 0.02%, Mo: at most 0.5% and V: at most 0.5%, with a balance of Fe and inevitable impurities, in which the mean grain size of the precipitated carbides is at most 0.5 ?m and of which the hardness in the center part of the wall thickness in the cross section perpendicular to the longitudinal direction of the steel pipe is at least 400 HV.
    Type: Application
    Filed: April 15, 2010
    Publication date: October 20, 2011
    Inventors: Masaru Fujihara, Tsunetoshi Suzaki
  • Patent number: 8038930
    Abstract: The invention relates to a cooling element to be used in the structure of a pyromettalurgical reactor used in the manufacturing of metals, which cooling element comprises a housing element mainly made of copper, provided with a channel system for the cooling medium circulation, made of pipe that is mainly made of copper; on the outer surface of the pipes forming the channel system, there is arranged a coating that has a lower melting point than the material of the housing element and the pipe. The invention also relates to a method for manufacturing the cooling element.
    Type: Grant
    Filed: November 23, 2006
    Date of Patent: October 18, 2011
    Assignee: Outotec Oyj
    Inventors: Kai Seppälä, Jyrki Koitto, Risto Saarinen
  • Patent number: 8002910
    Abstract: The present invention pertains to steel with high mechanical resistance at room temperature and up to 130° C., good toughness and good corrosion resistance in the metal base as well as good resistance to cracking in the heat affected zones (HAZ) once the tubing is welded together, and more specifically to heavy gauge seamless steel tubing with high mechanical resistance, good toughness and good corrosion resistance called catenary conduit. The advantages of the present invention with respect to those of an the state of technology reside in providing a chemical composition for steel used to manufacture heavy gauge seamless steel tubing with high mechanical resistance, good toughness, good fissure resistance in the HAZ and good corrosion resistance and a process for manufacturing this product. These advantages are obtained by using a composition made up basically of Fe and a specific chemical composition.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: August 23, 2011
    Assignees: Tubos De Acero De Mexico S.A., Dalmine S.p.A.
    Inventors: Marco Mario Tivelli, Alfonso Izquierdo Garcia, Dionino Colleluori, Guiseppe Cumino
  • Publication number: 20110155289
    Abstract: It is an object to provide a residual stress improving method for a pipe by imparting larger compressive residual stress on the pipe to sufficiently reduce tensile residual stress in order to prevent the stress corrosion cracking. With respect to a stress improving region where the residual stress of a pipe is to be improved, a load in the axial direction of the pipe is made such stress making axial strain of the outer surface of the pipe 0% or above and being yield stress of the pipe or below, and internal pressure of the pipe is raised. The pipe is plastically deformed and is expanded in the radial direction by the internal pressure. After the internal pressure is raised to the degree the pipe is plastically deformed, the internal pressure and the axial load are removed, and thereby compressive residual stress is imparted to a welding section and a heat affected zone which are the stress improving region of the inner surface of the pipe.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 30, 2011
    Inventor: Fuminori IWAMATSU
  • Patent number: 7896983
    Abstract: In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: March 1, 2011
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hiroshi Koyama, Koichi Tamatsu, Masato Sugawara, Jun Umeno, Hiroshi Machida, Hiroshi Masuya, Fumiaki Kimura, Yasuaki Tsuji, Akihiro Katsuya, Takahiro Nakamura
  • Patent number: 7887649
    Abstract: A high-tensile strength welded steel tube has excellent formability and torsional fatigue endurance after being formed into cross-sectional shape and then stress-relief annealed. A steel material used has a composition which contains C, Si, Al, 1.01% to 1.99% Mn, 0.041% to 0.150% Ti, 0.017% to 0.150% Nb, P, S, N, and O such that the sum of the content of Ti and that of Nb is 0.08% or more, the content of each of C, Si, and Al being within an appropriate range, the content of each of P, S, N, and O being adjusted to a predetermined value or less.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: February 15, 2011
    Assignee: JFE Steel Corporation
    Inventors: Shunsuke Toyoda, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Koji Suzuki, Kei Sakata, Makio Gunji, Akio Sato, Tetsuro Sawaki
  • Publication number: 20110002433
    Abstract: A water reactor fuel cladding tube (4) is described. The tube (4) comprises an outer layer (6) of a first zirconium based alloy and has metallurgically bonded thereto an inner layer (7) of a second zirconium based alloy. The inner layer protects (7) the cladding tube (4) against stress corrosion cracking. The second zirconium based alloy comprises tin as an alloying material, and each one of the zirconium based alloys comprises at least 96 percent by weight zirconium. The first zirconium based alloy comprises at least 0.1 percent by weight niobium. A method of manufacturing the cladding tube (4) is also described and comprises the step of co-extruding two tubes of different zirconium based alloys to produce the cladding tube (4).
    Type: Application
    Filed: August 13, 2007
    Publication date: January 6, 2011
    Inventors: Lars Hallstadius, Mats Dahlback
  • Publication number: 20100319815
    Abstract: A method of making articles made of shape memory alloys having improved fatigue performance and to methods of treating articles formed from shape memory alloy materials by pre-straining the articles (or desired portions of the articles) in a controlled manner so that the resultant articles exhibit improved fatigue performance. The shape memory articles are preferably medical devices, more preferably implantable medical devices. They are most preferably devices of nitinol shape memory alloy, most particularly that is superelastic at normal body temperature. The pre-straining method of the present invention as performed on such articles includes the controlled introduction of non-recoverable tensile strains greater than about 0.20% at the surface of a desired portion of a shape memory alloy article. Controlled pre-straining operations are performed on the shape-set nitinol metal to achieve non-recoverable tensile strain greater than about 0.
    Type: Application
    Filed: August 31, 2010
    Publication date: December 23, 2010
    Inventors: Bret A. Dooley, Christopher C. Lasley, Michael R. Mitchell, Robert R. Steele, Eric M. Tittelbaugh
  • Patent number: 7842139
    Abstract: The present invention is directed to a method for protecting metal surfaces in oil & gas exploration and production, refinery and petrochemical process applications subject to solid particulate erosion at temperatures of up to 1000° C. The method includes the step of providing the metal surfaces in such applications with a hot erosion resistant cermet lining or insert, wherein the cermet lining or insert includes a) about 30 to about 95 vol % of a ceramic phase, and b) a metal binder phase, wherein the cermet lining or insert has a HEAT erosion resistance index of at least 5.0 and a K1C fracture toughness of at least 7.0 MPa-m1/2. The metal surfaces may also be provided with a hot erosion resistant cermet coating having a HEAT erosion resistance index of at least 5.0.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: November 30, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: John R. Peterson, Narasimha-Rao V. Bangaru, Robert Lee Antram, Christopher John Fowler, Neeraj S. Thirumalai, ChangMin Chun, Emery B. Lendvai-Lintner
  • Patent number: 7799149
    Abstract: An oil country tubular good for expansion according to the invention is expanded in a well. The oil country tubular good for expansion has a composition containing, in percentage by mass, 0.05% to 0.08% C, at most 0.50% Si, 0.80% to 1.30% Mn, at most 0.030% P, at most 0.020% S, 0.08% to 0.50% Cr, at most 0.01% N, 0.005% to 0.06% Al, at most 0.05% Ti, at most 0.50% Cu, and at most 0.50% Ni, and the balance consisting of Fe and impurities, and a structure having a ferrite ratio of at least 80%. The oil country tubular good for expansion has a yield strength in the range from 276 MPa to 379 MPa and a uniform elongation of at least 16%. Therefore, the oil country tubular good according to the invention has a high pipe expansion characteristic.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: September 21, 2010
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Taro Ohe, Keiichi Nakamura, Hideki Takabe, Toshiharu Abe, Tomoki Mori, Masakatsu Ueda