Iron(fe) Or Iron Base Alloy Patents (Class 148/578)
  • Patent number: 9862108
    Abstract: An integrally formed rigid razor blade having a body with a cutting edge portion extending about a cutting edge portion plane, and having a cutting edge at one end, a base portion extending along a base portion plane, a bent portion intermediate the cutting edge portion and the base portion. The body is made of martensitic stainless steel that includes mainly iron and between 0.62% and 0.75% of carbon in weight.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: January 9, 2018
    Assignee: BIC VIOLEX S.A.
    Inventors: Vasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
  • Patent number: 9731345
    Abstract: Provided is a martensitic stainless steel having excellent productivity and high corrosion resistance, which comprises, as percentages by weight, 0.45 to 0.60% carbon, 0.02 to 0.08% nitrogen, 0.2 to 0.4% silicon, 0.3 to 0.6% manganese, 12 to 15% chromium, one or more kinds of 0.1 to 1.5% molybdenum or 0.1 to 1.5% tungsten and Fe and other unavoidable impurities as remnants.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 15, 2017
    Assignee: POSCO
    Inventors: Ki-Hoon Jo, Dong-Chul Chae, Won-Qeun Son, Bong-Wn Kim
  • Publication number: 20150027598
    Abstract: A hardenable chromium-nickel steel, comprising 0.005 to 0.12% carbon, 9 to 17% chromium, 5 to 12% nickel, at most 3% cobalt, 0.5 to 4% molybdenum, 0.25 to 1.0% silicon, 0.5% to 3.0% manganese, 1 to 3% titanium, 0.25 to 1% vanadium, 0.05 to 0.5% niobium, 0.001 to 0.30% nitrogen, at most 0.5% tantalum, 0.001 to 0.030% sulfur, 0.2 to 2.0% copper, at most 0.5% tungsten, at most 1.5% aluminum, 0.0001 to 0.01% boron, and at most 0.035% phosphorus, remainder iron including impurities resulting from smelting, is suitable in particular as a material for producing wire by drawing in the 3-phase region of ?-martensite, ?-martensite, and austenite, in conjunction with a heat treatment. The wire can be used for components for instrument construction, surgical needles, valve pins, and dental braces.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 29, 2015
    Inventors: Stefan Seng, Gisbert Klossulitzka, Osakar Pacher, Günter Schnabel
  • Patent number: 8906171
    Abstract: The invention relates to a method of producing a TWIP and nano twinned austenitic stainless steel. The austenitic steel should not contain more than 0.018 wt % C, 0.25-0.75 wt % Si, 1.5-2 wt % Mn, 17.80-19.60 wt % Cr, 24.00-25.25 wt % Ni, 3.75-4.85 wt % Mo, 1.26-2.78 wt % Cu, 0.04-0.15 wt % N, and the balance of Fe. In order to form nano twins in the material the austenitic stainless steel should be brought to a temperature below 0° C., and imparted a plastic deformation to such a degree that the desired nano twins are formed, e.g. to a plastic deformation of around 30%. The invention also relates to the thus produced austenitic stainless steel.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: December 9, 2014
    Assignee: Sandvik Intellectual Property
    Inventors: Ulrika Magnusson, Guocai Chai
  • Patent number: 8858741
    Abstract: A method for treating high-strength, low-alloy steel includes controlling material responses, such as the crystal structure of the steel, through various processing steps. More specifically, the method includes cold treating the steel to achieve predictable increases in a minimum ultimate tensile strength or desired changes in the crystal structure of the steel. In one embodiment, cold treating the steel operates to controllably increase the minimum ultimate tensile strength of the steel within increasing a specified maximum ultimate tensile strength of the steel. Stated otherwise, cold treating the steel may reduce or narrow a minimum-to-maximum ultimate tensile strength range such that the minimum ultimate tensile strength is closer to the specified maximum ultimate tensile strength.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: October 14, 2014
    Assignee: Goodrich Corporation
    Inventor: Edward B. Evans
  • Publication number: 20140158257
    Abstract: In a method for producing a motor vehicle component and a motor vehicle component produced according to the invention a steel sheet with a stacking fault energy between 10 and 40 mJ/m2 and a manganese content between 10 and 30% is provided, which is prone to twin formation at room temperature and has at least regions with a predominantly austenitic microstructure. Regions of this steel sheet are first temperature treated to a temperature between +30° C. and ?250° C. and subsequently cold formed.
    Type: Application
    Filed: November 29, 2013
    Publication date: June 12, 2014
    Applicant: Benteler Automobiltechnik GmbH
    Inventors: Andreas Frehn, Thomas Niendorf, Christian Rüsing, Hans Jürgen Maier
  • Patent number: 8394319
    Abstract: Nickel, Ni, of 5 to 10 mass %, silicon, Si, of 0.5 to 5 mass %, manganese, Mn, of 0.01 to 1 mass %, carbon, C, of 0.2 to 2 mass % and a remaining part consisting of iron, Fe, and incidental impurities are employed, and further chromium, Cr, of 1 to 10 mass % is added to obtain a martensitic cast steel material for which a martensitic transformation finish temperature (Mf point) is below freezing. Further, a cast steel material that contains vanadium V of 0.1 to 5 mass % in addition to the above elements of the material is also obtained. For these cast steel materials, since martensitic transformation occurs merely by performing a sub-zero treatment, the tempering process can be comparatively easily performed, and machining in a desired shape is easily performed.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: March 12, 2013
    Assignees: Yamagataken, Yugen Kaisha Watanabe Chuzo-Sho
    Inventors: Toshitaka Watanabe, Toru Yamada, Noboru Sato, Satoshi Nakano, Toshiro Matsuki
  • Patent number: 8388774
    Abstract: A multi-wave thermal process for treating a metal to improve structural characteristics is herein disclosed. The metal can be placed in a chamber. Each wave of the process can include: selecting a target temperature; selecting a temperature rate; and controlling the temperature rate while chilling the metal by introducing a cryogenic material into the chamber, while preventing over-stressing of the metal, to the target temperature at the temperature rate. While chilling the metal, the process can include inserting a hold time on the metal at an intermediate temperature for equalization of the temperature uniformly throughout the metal, thereby creating uniformity in a microcrystalline structure of the metal. The process can further include: stopping the introduction of the cryogenic material once the target temperature is reached and holding the metal at the target temperature. The process can result in a treated metal without fractures and with an organized microcrystalline structure.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: March 5, 2013
    Inventor: Daniel Martin Watson
  • Patent number: 8192560
    Abstract: The invention relates to steel which is characterized by the following composition as expressed in percentages by weight: —C=0.18 0.30%, —Co=5-7%, —Cr=2-5%, —Al=1-2%, —Mo+W/2=1-4%, —V=trace 0.3%, —Nb=trace 0.1%, —B=trace?50 ppm, —Ni=10.5-15% with Ni?7+3.5 Al, —Si=trace 0.4%, —Mn=trace 0.4%, —Ca=trace?500 ppm, —Rare earths=trace?500 ppm, —Ti=trace?500 ppm, —O=trace?200 ppm if the steel is obtained by means of powder metallurgy or trace?50 ppm if the steel is produced in air or under a vacuum from molten metal, —N=trace?100 ppm, —S=trace?50 ppm, —Cu=trace?1%, and —P=trace?200 ppm, the remainder including iron and the inevitable impurities resulting from production. The invention also relates to a method of producing a part from said steel and to the part thus obtained.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: June 5, 2012
    Assignees: Aubert & Duval, SNECMA Moteurs
    Inventors: Jacques Montagnon, Philippe Heritier, Isabelle Peslerbe, Claude Mons
  • Patent number: 8152938
    Abstract: The invention relates to steel which is characterized by the following composition as expressed in percentages by weight: —C=0.18 0.30%, —Co=5-7%, —Cr=2-5%, —Al=1-2%, —Mo+W/2=1-4%, —V=trace 0.3%, —Nb=trace 0.1%, —B=trace—50 ppm, —Ni=10.5-15% with Ni?7+3.5 Al, —Si=trace 0.4%, —Mn=trace 0.4%, —Ca=trace—500 ppm, —Rare earths=trace—500 ppm, —Ti=trace—500 ppm, —O=Trace—200 ppm if the steel is obtained by means of powder metallurgy or trace—50 ppm if the steel is produced in air or under a vacuum from molten metal, —N=trace—100 ppm, —S=trace—50 ppm, —Cu=trace—1%, and —P=trace—200 ppm, the remainder including iron and the inevitable impurities resulting from production. The invention also relates to a method of producing a part from said steel and to the part thus obtained.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: April 10, 2012
    Assignees: Aubert & Duval, SNECMA Moteurs
    Inventors: Jacques Montagnon, Philippe Heritier, Isabelle Peslerbe, Claude Mons
  • Patent number: 8137483
    Abstract: A method of designing low cost, high strength, high toughness martensitic steel uses mathematical modeling to define optimum low cost chemical compositions, the content of retained austenite, and critical temperatures; melting an ingot, processing same, making steel articles, and heat treating the articles using the critical temperatures and the content of retained austenite. The new steel comprises, by weight, about 0.3-0.45% of C; at most 2.5% of Cr; at most 1.0% of Mo; at most 3.50% of Ni; about 0.3 to 1.5% of Mn; about 0.1-1.3% of Si; about 0.1-1.0% of Cu; Cu being less than Si; about 0.1 to 1.0% of V+Ti+Nb; at most 0.25% of Al; the sum of alloying elements being less than about 11.5%; the balance being essentially Fe and incidental impurities. Procedures of melting, processing and heat treatment using the mathematical model are disclosed.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: March 20, 2012
    Inventors: Vladimir A. Fedchun, Gregory Vartanov
  • Publication number: 20120055592
    Abstract: Described herein are a method, an apparatus, and a system for metal processing that improves one or more properties of a sintered metal part by controlling the process conditions of the cooling zone of a continuous furnace using one or more cryogenic fluids. In one aspect, there is provided a method comprising: providing a furnace wherein the metal part is passed therethough on a conveyor belt and comprises a hot zone and a cooling zone wherein the cooling zone has a first temperature; and introducing a cryogenic fluid into the cooling zone where the cryogenic fluid reduces the temperature of the cooling zone to a second temperature, wherein at least a portion of the cryogenic fluid provides a vapor within the cooling zone and cools the metal parts passing therethrough at an accelerated cooling rate.
    Type: Application
    Filed: February 17, 2011
    Publication date: March 8, 2012
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Zbigniew Zurecki, Ranajit Ghosh, Lisa Ann Mercando, Xiaoyi He, John Lewis Green, David Scott Nelson
  • Patent number: 8097098
    Abstract: The invention concerns martensitic stainless steel, characterized in that its composition in weight percentages is as follows: 9%=Cr=13%; 1.5%=Mo=3%; 8%=Ni=14%; 1%=Al=2%; 0.5%=Ti=1.5% with AI+Ti=2.25%; traces=Co=2%; traces=W=1% with Mo+(W/2)=3%; traces=P=0.02%; traces=S=0.0050%; traces=N=0.0060%; traces=C=0.025%; traces=Cu=0.5%; traces=Mn=3%; traces=Si=0.25%; traces=O=0.0050%; and is such that: Ms (° C.)=1302 42 Cr 63 Ni 30 Mo+20AI-15W-33Mn-28Si-30Cu-13Co+10 Ti=50Cr eq/Ni eq=1.05 with Cr eq (%)=Cr+2Si+Mo+1.5 Ti+5.5 AI+0.6W Ni eq (%)=2Ni+0.5 Mn+3O C+25 N+Co+0.3 Cu. The invention also concerns a method for making a mechanical part using said steel, and the resulting part.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: January 17, 2012
    Assignee: Aubert & Duval
    Inventor: Jacques Montagnon
  • Publication number: 20120000579
    Abstract: An ultra-high strength stainless steel alloy with enhanced toughness includes in % by weight: 0 to 0.06% carbon (C); 12.0 to 18% chromium (Cr); 16.5 to 31.0% cobalt (Co); 0 to 8% molybdenum (Mo); 0.5 to 5.0% nickel (Ni); 0 to 0.5% titanium (Ti); 0 to 1.0% niobium (Nb); 0 to 0.5% vanadium (V); 0 to 16% tungsten (W); balance iron (Fe) and incidental deoxidizers and impurities. The heat treating method includes the steps of austenitizing at least once followed by quenching, tempering and sub-zero cooling to obtain no more than about 6-8% retained austenite in the finished alloy.
    Type: Application
    Filed: September 7, 2011
    Publication date: January 5, 2012
    Applicant: CARNEGIE MELLON UNIVERSITY
    Inventor: Warren M. Garrison, JR.
  • Patent number: 8075991
    Abstract: A stainless steel material for a fuel cell, used for a fuel cell or a cartridge for the fuel cell, having a magnetic permeability of 1.000 to 2.500, and forming a layer having a value of chromium atomic %/iron atomic % of not less than 3.0 in the most surface thereof, and/or the layer of thickness of not less than 12 nm calculated as SiO2 having an oxygen atomic % of not less than 20%. Even when brought into contact with the content solution exhibiting acidity of the fuel cell, the stainless steel material reliably suppresses the elution of metal ions thereof.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: December 13, 2011
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Kouki Kinouchi, Wataru Kurokawa, Shouzou Shintani, Kinuyo Shintani, legal representative, Daisuke Imoda, Kenji Yoshihiro, You Yamamori
  • Publication number: 20110232809
    Abstract: A precipitation-hardened stainless steel alloy comprises, by weight: about 14.0 to about 16.0 percent chromium; about 6.0 to about 8.0 percent nickel; about 1.25 to about 1.75 percent copper; greater than about 1.5 to about 2.0 percent molybdenum; about 0.001 to about 0.025 percent carbon; niobium in an amount greater than about twenty times that of carbon; and the balance iron and incidental impurities. The alloy has an aged microstructure and an ultimate tensile strength of at least about 1100 MPa and a Charpy V-notch toughness of at least about 69 J. In one embodiment, the aged microstructure includes martensite and not more than about 10% reverted austenite. In another embodiment, the alloy includes substantially all martensite and substantially no reverted austenite. The alloy is useful for making turbine airfoils.
    Type: Application
    Filed: June 8, 2011
    Publication date: September 29, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Jianqiang Chen, Thomas Michael Moors, Jon Conrad Schaeffer
  • Publication number: 20110226386
    Abstract: A steel characterized in that its composition is percentages by weight: C=0.18-0.30% Co=1.5-4% Cr=2-5% Al=1-2% Mo+W/2=1-4% V=traces-0.3% Nb=traces-0.1% B=traces-30 ppm Ni=11-16% where Ni?7+3.5 Al Si=traces-1.0% Mn=traces-4.0% Ca=traces-20 ppm Rare earths=traces-100 ppm if N?10 ppm, Ti+Zr/2=traces-100 ppm where Ti+Zr/2?10 N if 10 ppm<N?20 ppm, Ti+Zr/2=traces-150 ppm O=traces-50 ppm N=traces-20 ppm S=traces-20 ppm Cu=traces-1% P=traces-200 ppm the remainder being iron and inevitable impurities resulting from the smelting. A process for manufacturing a part from this steel, and part thus obtained.
    Type: Application
    Filed: July 8, 2009
    Publication date: September 22, 2011
    Inventor: François Roch
  • Patent number: 7967927
    Abstract: A nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steel possesses a combination of strength and corrosion resistance comprising in combination, by weight, about: 0.1 to 0.3% carbon (C), 8 to 17% cobalt (Co), 0 to 10% nickel (Ni), 6 to 12% chromium (Cr), less than 1% silicon (Si), less than 0.5% manganese (Mn), and less than 0.15% copper (Cu), with additives selected from the group comprising about: less than 3% molybdenum (Mo), less than 0.3% niobium (Nb), less than 0.8% vanadium (V), less than 0.2% tantalum (Ta), less than 3% tungsten (W), and combinations thereof, with additional additives selected from the group comprising about: less than 0.2% titanium (Ti), less than 0.2% lanthanum (La) or other rare earth elements, less than 0.15% zirconium (Zr), less than 0.005% boron (B), and combinations thereof, impurities of less than about: 0.02% sulfur (S), 0.012% phosphorus (P), 0.015% oxygen (O) and 0.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: June 28, 2011
    Assignee: QuesTek Innovations, LLC
    Inventors: Charles J. Kuehmann, Gregory B. Olson, Herng-Jeng Jou
  • Publication number: 20110048583
    Abstract: The invention relates to steel which is characterized by the following composition as expressed in percentages by weight: —C=0.18 0.30%, —Co=5-7%, —Cr=2-5%, —Al=1-2%, —Mo+W/2=1-4%, —V=trace 0.3%, —Nb=trace 0.1%, —B=trace?50 ppm, —Ni=10.5-15% with Ni?7+3.5 Al, —Si=trace 0.4%, —Mn=trace 0.4%, —Ca=trace?500 ppm, —Rare earths=trace?500 ppm, —Ti=trace?500 ppm, ?O=trace?200 ppm if the steel is obtained by means of powder metallurgy or trace?50 ppm if the steel is produced in air or under a vacuum from molten metal, —N=trace?100 ppm, —S=trace?50 ppm, —Cu=trace?1%, and —P=trace?200 ppm, the remainder including iron and the inevitable impurities resulting from production. The invention also relates to a method of producing a part from said steel and to the part thus obtained.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 3, 2011
    Applicants: AUBERT & DUVAL, SNECMA MOTEURS
    Inventors: Jacques MONTAGNON, Philippe HERITIER, Isabelle PESLERBE, Claude MONS
  • Publication number: 20100282377
    Abstract: A method for treating high-strength, low-alloy steel includes controlling material responses, such as the crystal structure of the steel, through various processing steps. More specifically, the method includes cold treating the steel to achieve predictable increases in a minimum ultimate tensile strength or desired changes in the crystal structure of the steel. In one embodiment, cold treating the steel operates to controllably increase the minimum ultimate tensile strength of the steel within increasing a specified maximum ultimate tensile strength of the steel. Stated otherwise, cold treating the steel may reduce or narrow a minimum-to-maximum ultimate tensile strength range such that the minimum ultimate tensile strength is closer to the specified maximum ultimate tensile strength.
    Type: Application
    Filed: May 6, 2009
    Publication date: November 11, 2010
    Applicant: Goodrich Corporation
    Inventor: Edward B. Evans
  • Patent number: 7763130
    Abstract: A thermal process for treating a metal to improve at least one structural characteristic of the metal comprising: placing a metal with a metal temperature within a thermal control apparatus, introducing a cryogenic material to decrease the metal temperature, while preventing over-stressing of the metal, to a first target temperature ranging from ?120 degrees Fahrenheit to ?380 degrees Fahrenheit at a first temperature rate, ranging from degrees Fahrenheit per minute to 20 degrees Fahrenheit per minute, stopping the introduction of cryogenic material once the first target temperature is reached, and increasing the chamber temperature to a second target temperature ranging from 0 degrees Fahrenheit to 1400, and increasing the metal temperature to the second target temperature at a second temperature rate ranging from 0.25 degrees Fahrenheit per minute to 20 degrees Fahrenheit per minute, resulting in a treated metal without fractures.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: July 27, 2010
    Inventors: Daniel Martin Watson, Billie Sunday Watson
  • Patent number: 7744707
    Abstract: A deep cryogenic tempering process for brake components such as rotors and drums is provided, wherein the unique processing profile is dependent on properties of the specific brake components. The process comprises the steps of placing a brake component at a temperature within a cryogenic processing chamber, cooling the brake component at a descent rate until the brake component temperature is approximately ?300° F., maintaining the brake component temperature at ?300° F. for a stay time, raising the temperature of the brake component to approximately ?300° F. at an ascent rate, maintaining the temperature of the brake component at 300° F. for a post temper time, and lowering the temperature of the brake component to room temperature at a cool down rate.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: June 29, 2010
    Inventor: Robert Woolley Brunson
  • Publication number: 20100139817
    Abstract: The invention concerns martensitic stainless steel, characterized in that its composition in weight percentages is as follows: 9%=Cr=13%; 1.5%=Mo=3%; 8%=Ni=14%; 1%=Al=2%; 0.5%=Ti=1.5% with AI+Ti=2.25%; traces=Co=2%; traces=W=1% with Mo+(W/2)=3%; traces=P=0.02%; traces=S=0.0050%; traces=N=0.0060%; traces=C=0.025%; traces=Cu=0.5%; traces=Mn=3%; traces=Si=0.25%; traces=O=0.0050%; and is such that: Ms (° C.)=1302 42 Cr 63 Ni 30 Mo+20AI-15W-33Mn-28Si-30Cu-13Co+10 Ti=50Cr eq/Ni eq=1.05 with Cr eq (%)=Cr+2Si+Mo+1.5 Ti+5.5 AI+0.6W Ni eq (%)=2Ni+0.5 Mn+3O C+25 N+Co+0.3 Cu. The invention also concerns a method for making a mechanical part using said steel, and the resulting part.
    Type: Application
    Filed: June 26, 2006
    Publication date: June 10, 2010
    Inventor: Jacques Montagnon
  • Publication number: 20080286603
    Abstract: Disclosed is a steel sheet that exhibits an ultra-high strength after hot press forming followed by rapid cooling, and an enhanced yield strength after painting. The steel sheet has a composition comprising 0.1% to 0.5% by weight of C, 0.01% to 1.0% by weight of Si, 0.5% to 4.0% by weight of Mn, 0.1% by weight or less of P, 0.03% by weight or less of S, 0.1% by weight of soluble Al, 0.01% to 0.1% by weight of N, 0.3% by weight or less of W, and the balance Fe and other inevitable impurities. Further disclosed are a hot-pressed part made of the steel sheet and a method for manufacturing the hot-pressed part. The hot-pressed part achieves a high increment in yield strength after heat treatment for painting while ensuring an ultra-high tensile strength. Furthermore, the hot-pressed part exhibits superior adhesion to a coating layer, good surface appearance and improved corrosion resistance after painting.
    Type: Application
    Filed: December 1, 2006
    Publication date: November 20, 2008
    Applicant: POSCO
    Inventors: Jin-Keun Oh, Dae-Chul Bae, Seong-Ju Kim, Kwang-Geun Chin, Jae-Ryung Lee, Young-Jun Park
  • Publication number: 20080193321
    Abstract: The invention relates to steel which is characterised by the following composition as expressed in percentages by weight:—C=0.18 0.30%, —Co=5-7%, —Cr=2-5%, —Al=1-2%, —Mo+W/2=1-4%, —V=trace 0.3%, —Nb=trace 0.1%, —B=trace?50 ppm, —Ni=10.5-15% with Ni?7+3.5 Al, —Si=trace 0.4%, —Mn=trace 0.4%, —Ca=trace?500 ppm, -Rare earths=trace?500 ppm, —Ti=trace?500 ppm, —O=trace?200 ppm if the steel is obtained by means of powder metallurgy or trace?50 ppm if the steel is produced in air or under a vacuum from molten metal, —N=trace?100 ppm, —S=trace?50 ppm, —Cu=trace?1%, and —P=trace?200 ppm, the remainder comprising iron and the inevitable impurities resulting from production. The invention also relates to a method of producing a part from said steel and to the part thus obtained.
    Type: Application
    Filed: April 20, 2006
    Publication date: August 14, 2008
    Applicant: AUBERT & DUVAL
    Inventors: Jacques Montagnon, Philippe Heritier, Isabelle Peslerbe, Claude Mons
  • Patent number: 7163595
    Abstract: The thermal process for treating a metal to improve structural characteristics of the metal entails placing a metal within a thermal control apparatus; introducing a cryogenic material into the thermal control apparatus to decrease the metal temperature, while preventing over-stressing of the metal, to a first target temperature ranging from ?40 degrees F. and ?380 degrees F. at a first temperature rate ranging from 0.25 degrees per minute and 20 degrees per minute; stopping the introduction of the cryogenic material once the first target temperature is reached; increasing the chamber temperature to a second target, temperature ranging from 0 degrees F. and 1400 degrees F.; and increasing the metal temperature to the second target temperature at a second temperature rate ranging from 0.25 degrees per minute and 20 degrees per minute, resulting in a treated metal without fractures.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: January 16, 2007
    Inventor: Daniel Watson
  • Patent number: 7074285
    Abstract: The invention provides a high-speed tool steel gear cutting tool in which fracture or chipping does not occur at the cutting edge, and which realizes excellent cutting performance over long periods. Moreover, a method of manufacturing a gear cutting tool including: a step for quenching a tool material comprising high-speed tool steel and which has been rough processed to a shape corresponding to a final shape of a gear cutting tool, to transform a structure of the tool material into martensite, a step for temperling the tool material after quenching to transform any residual austenite dispersingly distributed throughout a matrix of the martensite structure formed by the quenching, into martensite, and a step for finishing the tool material after tempering to a final shape, is characterized in that the tool material after quenching is subjected to sub-zero treatment involving cooling and holding at a temperature of less than ?150 ° C.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: July 11, 2006
    Assignee: Mitsubishi Materials Kobe Tools Corporation
    Inventors: Yasuyuki Yamada, Natsuki Ichimiya, Koichi Maeda, Yusuke Tanaka, Kazuaki Tanaka
  • Patent number: 6695937
    Abstract: A golf club head is comprised of cryogenically treated steel resulting in the striking face having a reduced face thickness of between 0.115 inches and 0.130 inches, and therefore, a reduced striking face mass. Extra material which is eliminated from the striking face, is distributed in other areas of the club head to enhance performance. In an iron club head embodiment, the club head includes a heel portion, toe portion, bottom sole portion, top ridge portion, hosel portion, striking face, rear surface, and peripheral mass on the rear surface which forms a rear cavity. A cantilevered mass extends from the bottom sole portion toward the top ridge portion within the rear cavity, spaced apart from the rear surface. In a wood club head embodiment, the club head includes a hollow body having an inner cavity delimited by a sole portion, a striking face, a heel portion, a toe portion, and a crown portion which links the striking face, toe portion, and heel portion.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: February 24, 2004
    Assignee: Nicklaus Golf Equipment Co., L.C.
    Inventor: John Thomas Stites, III
  • Publication number: 20030205304
    Abstract: The invention provides a high-speed tool steel gear cutting tool in which fracture or chipping does not occur at the cutting edge, and which realizes excellent cutting performance over long periods. Moreover, a method of manufacturing a gear cutting tool including: a step for quenching a tool material comprising high-speed tool steel and which has been rough processed to a shape corresponding to a final shape of a gear cutting tool, to transform a structure of the tool material into martensite, a step for temperling the tool material after quenching to transform any residual austenite dispersingly distributed throughout a matrix of the martensite structure formed by the quenching, into martensite, and a step for finishing the tool material after tempering to a final shape, is characterized in that the tool material after quenching is subjected to sub-zero treatment involving cooling and holding at a temperature of less than −150 ° C.
    Type: Application
    Filed: June 11, 2003
    Publication date: November 6, 2003
    Applicant: MMC KOBELCO TOOL CO., LTD.
    Inventors: Yasuyuki Yamada, Natsuki Ichimiya, Koichi Maeda, Yusuke Tanaka, Kazuaki Tanaka
  • Publication number: 20030111143
    Abstract: A method for cold forming a flattened, end-threaded rod into a U-bolt answers the need for high-strength steel rods that can be bent into flattened U-bolts by spring and suspension repair facilities or the like. By controlling the amount of work put into the end-threaded flattened rod during bending, it is possible to manufacture a flattened, end-threaded rod from a high-strength steel that can be successfully cold bent into a U-bolt. The amount or degree of flattening and the radius of the U-bolt are variables which applicant controls to successfully cold bend a high-strength steel flattened rod into a U-bolt. Therefore, the spring and suspension repair facility avoids the need to heat the flattened rods for warm forming and, instead, can maintain an inventory of end-threaded and flattened rods for cold forming into flattened U-bolt comply with OEM designs when modifying or repairing vehicles.
    Type: Application
    Filed: October 22, 2002
    Publication date: June 19, 2003
    Applicant: Consolidated Metal Products, Inc.
    Inventor: Robert P. Wheeler
  • Patent number: 6544669
    Abstract: A method of making cookware and bakeware having a stick resistant and mar resistant cook surface comprising the steps of providing a cooking utensil having a cook surface, and cryogenically treating the cooking utensil at one or more selected temperatures comprising −100° F. to −300° F. or lower to harden said cook surface. The cooking utensil may have a bare metal cook surface, or it may be coated with a stick resistant coating such as one of a PTFE, metal nitride or sulfide coating or combinations thereof prior to the cryogenic hardening treatment.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: April 8, 2003
    Assignee: Clad Metals LLC
    Inventor: William A. Groll
  • Patent number: 6537396
    Abstract: A clutch disc spring for a land vehicle, such as an over-the-road truck or an automobile, which has an increased life. The spring, formed of ferrous material, is cooled by vaporizing low temperature nitrogen to slowly, cryogenically cool the spring to a temperature of about −300 degrees Fahrenheit and maintain the spring at that temperature for several hours. The cryogenic treatment converts retained austenite within the spring to martensite, thereby improving the mechanical properties of the spring. The spring is then tempered to temper the newly formed martensite, further improving the mechanical properties of the spring. These improved mechanical properties include better wear resistance, strength and resistance to fatigue.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 25, 2003
    Assignee: Ace Manufacturing & Parts Company
    Inventor: Kevin Ijames
  • Patent number: 6531007
    Abstract: A method for the manufacture of steel products and products thus produced, wherein steel is subjected to precipitation hardening in a martensitic structure subsequent to soft annealing and thereafter shaping. The method steps include shaping followed by solution annealing between 1200° C. and 1050° C., quenching from the solution annealing temperature with a quenching speed of at least 5° C. per second to a temperature below 500° C., subjecting said steel to an isothermal martensitic transformation and subsequently hardening the steel at a temperature between 450° C. and 550° C. to precipitate particles out from solution into said martensitic structure.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: March 11, 2003
    Assignees: Sandvik AB, Koninklijke Philips Electronics, N.V.
    Inventors: Jan-Olof Nilsson, Sören Olsson, Hubert Sjoerd Blaauw, Adriaan Van der Grijn
  • Patent number: 6506270
    Abstract: A heat treatment method of steel is capable of enhancing wear resistance, mechanical properties and dimensional stability of the steel due to the reduction of the retained austenite amount to substantially zero. In the method, an article of the steel is subjected to a quenching and then subzero treatment including cooling it at a cooling rate of 1 to 10° C./min. to a cooling temperature and holding the cooling temperature for a predetermined period of time.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: January 14, 2003
    Assignees: Iwatani International Corporation, MMC Kobelco Tool Co., Ltd.
    Inventors: Kenzo Takashina, Yuji Komori, Kazuaki Tanaka, Masahiro Machida
  • Publication number: 20020179204
    Abstract: A deep cryogenic tempering process for brake components such as rotors and drums is provided, wherein the unique processing profile is dependent on properties of the specific brake components. The dependent properties include material, mass, and geometrical cross-section, among others, and as a result, application of the deep cryogenic tempering process to brake components results in significant improvements in performance and service life. In another preferred form, the present invention provides a brake component having an improved molecular structure as a result of undergoing deep cryogenic tempering, which results in improved structural properties such as improved warpage resistance and heat resistance, and reduced heat checking, fading, and cracking.
    Type: Application
    Filed: April 27, 2001
    Publication date: December 5, 2002
    Inventor: Robert Woolley Brunson
  • Publication number: 20020139454
    Abstract: There are provided a rolling bearing comprising an outer race, an inner race, and a plurality of rolling elements each interposed between the outer race and the inner race, at least one of the outer race, the inner race and the rolling elements being made of a steel consisting essentially, by mass, of 0.40 to 0.60% C, not more than 0.5% Si, not more than 0.5% Mn, not less than 8.0% but less than 10.0% Cr, and the balance Fe and incidental impurities, said steel having a hardness not less than 740 HV, carbides contained in said steel having a long size not more than 1.2 &mgr;m, and an amount of said carbides being not more than 3.5% in area %, and a method of producing the rolling bearing.
    Type: Application
    Filed: January 17, 2002
    Publication date: October 3, 2002
    Applicant: HITACHI METALS, LTD.
    Inventors: Makoto Komori, Yasushi Tamura
  • Patent number: 6402863
    Abstract: A method of heat treating 9Ni-4Co-0.30C class steel alloy uses shortened treatment time for normalizing, austenitizing, and tempering, as well as a lower tempering temperature, when compared to conventional heat treatment for this class of alloy material. The improved process is especially beneficial for large section parts, resulting in increases in yield and ultimate strength, combined with substantial increases in impact toughness.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: June 11, 2002
    Assignee: Lockheed Martin Corporation
    Inventor: William R. Spencer
  • Publication number: 20020017345
    Abstract: A heat treatment method of steel is capable of enhancing wear resistance, mechanical properties and dimensional stability of the steel due to the reduction of the retained austenite amount to substantially zero. In the method, an article of the steel is subjected to a quenching and then subzero treatment including cooling it at a cooling rate of 1 to 10° C./min. to a cooling temperature and holding the cooling temperature for a predetermined period of time.
    Type: Application
    Filed: June 19, 2001
    Publication date: February 14, 2002
    Applicant: IWATANI INTERNATIONAL CORPORATION
    Inventors: Kenzo Takashina, Yuji Komori, Kazuaki Tanaka, Masahiro Machida
  • Patent number: 6080247
    Abstract: Comminuting media comprising a martensitic/austenitic steel which contains at least about 40 percent by volume retained austenite, a portion of which is work transformable to martensite. The steel contains sufficient alloy content such that the steel has a martensite start and finish temperature sufficiently low to allow partial transformation of austenite to martensite during quenching of the steel from the austenitic range, but leaving some retained transformable austenite. This steel is used as a comminuting media, the retained austenite transforming to martensite through working or abrasion of the comminuting media during use in a comminution process. The outermost volume of the comminuting media which forms the wear surface and which contains the retained austenite in an amount of at least 40 percent by volume comprises at least 25 percent of the total volume of the comminuting media.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: June 27, 2000
    Assignee: GS Technologies Operating Company
    Inventors: Charles R. Arnett, Peter J. Moroz, Jr., James J. Lorenzetti
  • Patent number: 6048416
    Abstract: Steel, steel wire, and a process for forming a drawn wire, especially tire-reinforcing wire of diameter smaller than 0.4 mm, by drawing a steel of the following composition by weight: 0.005%.ltoreq.carbon.ltoreq.0.050%; 0.005%.ltoreq.nitrogen.ltoreq.0.050%; 0.1%.ltoreq.silicon.ltoreq.2.0%; 0.1%.ltoreq.manganese.ltoreq.5%; 5%.ltoreq.nickel.ltoreq.12%; 10%.ltoreq.chromium.ltoreq.20%; 0.01%.ltoreq.copper.ltoreq.4%; 0.01%.ltoreq.molybdenum.ltoreq.3%,the base wire being subjected to:drawing to a cumulative deformation ratio .epsilon. of larger than 2 and smaller than 4,an intermediate annealing treatment at above 700.degree. C.final drawing to a cumulative deformation ratio .epsilon. of smaller than 4.5 and larger than 3.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: April 11, 2000
    Assignees: Ugine-Savoie Imphy, Sprint Metal - Societe de Production Internationale de Trefiles
    Inventors: Jean-Michel Hauser, Joel Marandel
  • Patent number: 5865913
    Abstract: A method for treating firearm barrels and components to achieve an end result of increased accuracy and extended barrel life. The method involves placing the firearm barrels and components into cryogenic processing and heat treating equipment. The processing temperature is then significantly lowered to about -300 F. and maintained for a predetermined time. The processing temperature is then raised back to ambient temperature. After achieving ambient temperature the processing temperature is then raised to about +300 F. and maintained for a predetermined time. Finally the processing temperature is lowered back to ambient temperature.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: February 2, 1999
    Assignee: 300 Below, Inc.
    Inventors: Peter J. Paulin, John R. Koucky, Robert W. Brunson
  • Patent number: 5830290
    Abstract: The subject invention provides a method for manufacturing a spring band clip, wherein an alloyed steel is shaped, annealed, levelled into a narrow band, then shaped by stamping and bending into a non-machined clip, and the surface of the non-machined clip is smoothed and treated to produce resistance to corrosion; wherein the steel comprises iron as the main component and one or more of the following components by weight: 0.32 to 0.55% C; up to 2.0% Si; up to 2.0% Mn; up to 0.04% P; up to 0.04% S; 17.5 to 20% Cr; up to 1% Ni; 0.5 to 2.5% Mo; up to 0.5% V; up to 0.1% Al; up to 0.1% Co; up to 0.4% Cu; up to 0.4% Pb; up to 0.1% Se; up to 0.1% Te; up to 0.005% Ti; up to 0.1% W; up to 0.05% Zr; up to 0.01% O.sub.2 ; up to 0.01% N; up to 0.1% Bi; up to 0.001% B; up to 0.05% Nb; wherein the non-machined clip is austenitized prior to being smoothed and is converted into martensite by heat treatment in a salt-, oil-, or water bath, or by quenching at about the austenitizing temperature.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: November 3, 1998
    Assignee: Rasmussen GmbH
    Inventor: Hans-Jurgen Kreipe
  • Patent number: 5800641
    Abstract: A method of thermal or thermochemical treatment of precision steel components having different wall thicknesses comprising the steps of a) hardening (8), b) low temperature cooling (9) and c) annealing (10), wherein the precision steel components are subjected to a low temperature cooling of only selected parts of the precision steel component to effect a reduction in the occurrence of primary residual austenite in the selected parts thereof.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 1, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventor: E.H. Georg Schaeffler
  • Patent number: 5622573
    Abstract: A welding material for hard-facing which is to be hardened by a supercooling treatment after overlaying onto a cast iron base metal has a basic component composition which meets, in an overlaid condition, both a first condition and a second condition. The first condition is that a nickel (Ni) equivalent and a chromium (Cr) equivalent fall within that region to be defined in Schaeffler's structure diagram in which a difference in hardness before and after the supercooling treatment is a predetermined value or above. The second condition is that a starting temperature of martensitic transformation is a predetermined temperature or below.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: April 22, 1997
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideaki Ikeda, Tuyoshi Kokusho
  • Patent number: 5591277
    Abstract: A method for thermally conditioning a disc drive swage mount to enhance torque retention capability and plate stiffness wherein the swage mount is baked in an oxygen depleted environment to an elevated temperature within a predetermined range of temperatures which activates inherent frictional properties therein and controllably cooled non-linearly through a series of thermal cycles then instantaneously quenched to alter the material grain structure forming the swage mount. After the component is quenched, it is returned to ambient conditions for assembly into such disc drives.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: January 7, 1997
    Assignee: Intri-Plex Technologies, Inc.
    Inventor: Stephen T. Braunheim
  • Patent number: 5433801
    Abstract: Steel which is particularly useful for making a razor blade of high corrosion resistance contains more than 0.45%, but less than 0.55%, of carbon, 0.4 to 1.0% of silicon, 0.5 to 1.0% of manganese, 12 to 14% of chromium and 1.0 to 1.6% of molybdenum, all by weight, in addition to iron and inevitable impurities, and has a carbide density of 100 to 150 particles per 100 square microns as annealed. The razor blade has a Vickers hardness of at least 620 and a carbide density of 10 to 45 particles per 100 square microns, and preferably has a specific distribution of residual austenite content. The improved properties of the razor blade are achieved by an improved process of heat treatment which includes austenitizing the steel at a temperature of 1075.degree. C. to 1120.degree. C., cooling it to a temperature between -60.degree. C. and -80.degree. C. for hardening it, and tempering it at a temperature of 250.degree. C. to 400.degree. C.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: July 18, 1995
    Inventors: Wolfgang Althaus, Atsushi Kumagai
  • Patent number: 5361968
    Abstract: A metallic press die having an edge portion or high pressure portion for processing a workpiece therewith is made by overlaying a welding material to that portion of a base material for the metallic press die which forms the edge portion or high pressure portion, and then machining an overlaid portion into a predetermined shape of the edge portion or high pressure portion. The welding material has a hardness after welding of HRC 45 or below. After the machining step, the overlaid portion is subjected to a subzero treatment to increase the hardness of the overlaid portion. The welding material contains, as a basic composition thereof, 0.5-1.5% by weight of carbon (C), 0.2 -2.0% by weight of silicon (Si), 0.3-6.0% by weight of manganese (Mn), 0.3-10.0% by weight of chromium (Cr), 0.3-10.0% by weight of cobalt (Co), and the remaining parts of iron (Fe) inclusive of unavoidable impurities, and wherein a starting temperature of martensitic transformation is 150 .degree. C. or below.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: November 8, 1994
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Keizou Tanaka, Noboru Nishikawa, Tsuyoshi Kawase, Masami Watanabe
  • Patent number: 5259200
    Abstract: A process for treating an article of metal containing material such as tool steel so as to improve the properties such as shockability, wearability, stability and hardness of the article. In one embodiment, the process comprises immersing the article at ambient temperature into liquid cryogenic material for a time period up to or equal to a set time period equal to the minimum cross-sectional dimension in inches times ten minutes. The article is then withdrawn from contact with the liquid cryogenic material and immediately subjected to a flow of air sufficient to raise the temperature of the article to ambient temperature in a period of time equal to or less than ten minutes plus ten minutes per minimum cross-sectional dimension in inches.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: November 9, 1993
    Assignee: Nu-Bit, Inc.
    Inventor: Dennis J. Kamody
  • Patent number: 5221372
    Abstract: A cryogenically-formed and tempered stainless steel is provided having improved fracture toughness and corrosion resistance at a given hardness level, such as, for example, of at least about Rc 60 for bearing applications. The steel consists essentially of, in weight %, about 21 to about 24% Co, about 11 to about 13% Cr, about 7 to about 9% Ni, about 0.1 to about 0.5% Mo, about 0.2 to about 0.3% V, about 0.28 to about 0.32% C, and the balance iron. The steel includes a cryogenically-formed martensitic microstructure tempered to include about 5 to about 10 volume % post-deformation retained austenite dispersed therein and M.sub.2 C-type carbides, where M is Cr, Mo, V, and/or Fe, dispersed in the microstructure.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: June 22, 1993
    Assignee: Northwestern University
    Inventor: Gregory B. Olson