Patents Assigned to Aubert & Duval
  • Patent number: 10865457
    Abstract: The present invention relates to a steel composition carburizable and/or nitritable, comprising, in percentages by weight of the total composition: Carbon: 0.05-0.40, preferably 0.10-0.30; Chromium: 2.50-5.00, preferably 3.00-4.50; Molybdenum: 4.00-6.00; Tungsten: 0.01-1.80, preferably 0.02-1.50; Vanadium: 1.00-3.00, preferably 1.50-2.50; Nickel: 2.00-4.00; Cobalt: 2.00-8.00, preferably 3.00-7.00; Iron: balance as well as the inevitable impurities, optionally further comprising one or more of the following elements: Niobium: ?2.00; Nitrogen: ?0.50, preferably ?0.20; Silicon: ?0.70, preferably 0.05-0.50; Manganese: ?0.70, preferably 0.05-0.50; Aluminum: ?0.15, preferably ?0.10; the combined niobium+vanadium content being in the range 1.00-3.50; and the carbon+nitrogen content being in the range 0.05-0.50. It further relates to the method of production thereof, the steel blank obtained and a mechanical device comprising the latter.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: December 15, 2020
    Assignee: AUBERT & DUVAL
    Inventors: Jacques Bellus, Atman Benbahmed, Johanna Andre, Fredrik Sandberg
  • Patent number: 10724124
    Abstract: The present invention relates to a steel composition, to the process for manufacturing same, to the steel blank obtained having a hardness of between 46 and 48 HRC and a resilience KV at ?40° C. of at least 40 joules, and to the use thereof for manufacturing a pressure appliance component.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: July 28, 2020
    Assignee: AUBERT & DUVAL
    Inventors: Jacques J. Bellus, Dominique Thierree
  • Patent number: 10450644
    Abstract: A carburisable steel alloy suitable for bearing components comprising, in percent by weight: C 0.05-0.5 wt. % Cr 2.5-5.0 wt. %, Mo 4-6 wt. %, W 2-4.5 wt. %, V 1-3 wt. %, Ni 2-4 wt. %, Co 2-8 wt. %, optionally one or more of the following elements: Nb 0-2 wt. % N 0-0.5 wt. % Si 0-0.7 wt. %, Mn 0-0.7 wt. %, Al 0-0.1 5 wt. %, wherein the combined amount of Nb+V is within the range 1-3.5 wt. %, the combined amount of C+N is within the range 0.05-0.5 wt. %, the balance being Fe and unavoidable impurities.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: October 22, 2019
    Assignees: ERASTEEL, AUBERT & DUVAL
    Inventors: Johanna André, Fredrik Sandberg, M. Atman Benbahmed, Jacques Bellus
  • Patent number: 9808860
    Abstract: The tool according to the invention comprises a connecting head (22) support (70) extending along a longitudinal axis (B-B?); a mold base (72), supported by the support (70), the mold base (72) defining an axial orifice for passage of the connecting head (22); an end-piece (74) for mounting the support (70) on a movement member for moving the tool in the mold; and a mechanism (76) for longitudinal immobilization of the connecting head (22) on the support (70). The mechanism (76) for longitudinal immobilization is longitudinally adjustable relative to the support (70) in order to immobilize the connecting head (22) relative to the support (70) in at least two different longitudinal positions along the longitudinal axis (B-B?).
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: November 7, 2017
    Assignee: AUBERT & DUVAL
    Inventor: Thierry Barre
  • Publication number: 20160289805
    Abstract: A martensitic stainless steel is provided, wherein its composition is: trace amounts?C?0.030%; trace amounts?Si?0.25%; trace amounts?Mn?0.25%; trace amounts?S?0.020%; trace amounts?P?0.040%; 8%?Ni?14%; 8%?Cr?14%; 1.5%?Mo+W/2?3.0%; 1.0%?Al?2.0%; 0.5%?Ti?2.0%; 2%?Co?9%; trace amounts?N?0.030%; trace amounts?O?0.020%; the remainder being iron and impurities resulting from the steelmaking; and its martensitic transformation beginning temperature Ms is calculated by the formula Ms (° C.)=1302?28Si?50Mn?63Ni?42Cr?30Mo+20Al?12Co?25Cu+10[Ti?4(C+N)]??(1) wherein the contents of the various elements are expressed in weight percentages, is greater than or equal to 50° C., preferably greater than or equal to 75° C. A part made in this steel and its manufacturing method are also provided.
    Type: Application
    Filed: November 25, 2014
    Publication date: October 6, 2016
    Applicant: AUBERT & DUVAL
    Inventor: Sylvain Pierre PUECH
  • Patent number: 9429183
    Abstract: The invention relates to a method of producing a martensitic steel comprising a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of the last heat shaping pass of said steel is lower than the solubility temperature of the aluminum nitrides in the steel, and the treatment temperature for each potential heat treatment after said last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in said steel.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: August 30, 2016
    Assignees: SNECMA, AUBERT & DUVAL
    Inventors: Laurent Ferrer, Philippe Heritier
  • Patent number: 9181824
    Abstract: The invention concerns a method for making a unitary spark ignition valve, characterized in that it consists in preparing and casting a steel made up in wt. % of: 0.45%?C 0.55%; 12%?Cr?18%; 1%?Si?2.5%; traces?Mn?2%; 0.2%?V?0.5%; traces?Mo?0.5%; 0.05%?N?0.15%, with 0.55%?C+N?0.70%; traces?Ni?1%; traces?Cu?0.25%, or Cu?0.5 Ni if Cu>0.25%; traces?Co?1%; traces?W?0.2%; traces?Nb?0.15%; traces?AI?0.025%; traces?Ti?0.010%; traces?S?0.030%; traces?P?0.040%; traces?B?0.0050%; the balance being iron and impurities resulting from the preparation; in transforming by hot thermomechanical process, for example, by rolling and/or forging between 1000 and 1200° C.; optionally soft annealing, between 650 and 900° C.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: November 10, 2015
    Assignee: AUBERT & DUVAL
    Inventor: Jacques Montagnon
  • Patent number: 9175370
    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-2.0% 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: Grant
    Filed: July 8, 2009
    Date of Patent: November 3, 2015
    Assignee: AUBERT & DUVAL
    Inventor: François Roch
  • Patent number: 9045806
    Abstract: Steel, characterized in that the composition thereof is, in percentages by weight: C=0.20-0.30% Co=trace levels-1% Cr=2-5% Al=1-2% Mo+W/2=1-4% V=trace levels-0.3% Nb=trace levels-0.1% B=trace levels-30 ppm Ni=11-16% with Ni?7+3.5 Al Si=trace levels-1.0% Mn=trace levels-2.0% Ca=trace levels-20 ppm rare earths=trace levels-100 ppm if N?10 ppm, Ti+Zr/2=trace levels-100 ppm with Ti+Zr/2?10 N if 10 ppm<N?20 ppm, Ti+Zr/2=trace levels-150 ppm O=trace levels-50 ppm N=trace levels-20 ppm S=trace levels-20 ppm Cu=trace levels-1% P=trace levels-200 ppm the remainder being iron and inevitable impurities resulting from the production operation. Method of producing a component from this steel and a component obtained in this manner.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: June 2, 2015
    Assignee: AUBERT & DUVAL
    Inventor: Jacques Montagnon
  • Patent number: 8889064
    Abstract: A method for preparing a part in nickel-based superalloy is disclosed. The method comprises the following steps: elaborating a nickel-based superalloy with a composition capable of providing hardening by double precipitation of a gamma? phase and of a gamma? or delta phase; atomizing a melt of the superalloy in order to obtain a powder; sifting the powder; introducing the powder into a container; closing and applying vacuum to the container; densifiying the powder and the container in order to obtain an ingot or a billet; hot forming said ingot or said billet; wherein before the densification step, the powder and the container are heated for at least 4 hrs, at a temperature both above 1,140° C. and at least 10° C. less than the solidus temperature of the superalloy, and at a pressure causing densification of less than or equal to 15% of the powder volume.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: November 18, 2014
    Assignee: Aubert & Duval
    Inventor: Gérard Raisson
  • Publication number: 20140213375
    Abstract: The invention relates to a method of producing a martensitic steel comprising a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of the last heat shaping pass of said steel is lower than the solubility temperature of the aluminum nitrides in the steel, and the treatment temperature for each potential heat treatment after said last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in said steel.
    Type: Application
    Filed: July 16, 2013
    Publication date: July 31, 2014
    Applicants: Aubert & Duval, SNECMA
    Inventors: Laurent FERRER, Philippe Heritier
  • Patent number: 8702879
    Abstract: A method of producing a martensitic steel including a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of a last heat shaping pass of the steel is lower than the solubility temperature of aluminum nitrides in the steel, and a treatment temperature for each potential heat treatment after the last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in the steel.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: April 22, 2014
    Assignees: SNECMA, Aubert & Duval
    Inventors: Laurent Ferrer, Philippe Heritier
  • Patent number: 8551397
    Abstract: The invention relates to a manufacturing process for steel blanks. The invention relates in particular to a manufacturing process of a steel blank comprising electroslag remelting (ESR—ElectroSlag Remelting) or vacuum arc remelting (VAR—Vacuum Arc Remelting) to obtain very good mechanical properties. The blanks obtained can be used especially in the field of the manufacture of pressurized equipment elements and especially cannon tubes.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: October 8, 2013
    Assignee: Aubert & Duval
    Inventors: Gérald Gay, Bruno Gaillard-Allemand
  • Publication number: 20130037183
    Abstract: The invention relates to a process for the preparation of a part made of titanium alloy, comprising a thermal treatment for relaxing the internal stresses of the part, the thermal treatment comprising maintaining at a temperature “T1” greater than the beta transus (beta transition) temperature, referred to as “Tbt”, and the part being free to deform by creeping. The invention also relates to a tool for carrying out this process.
    Type: Application
    Filed: October 20, 2010
    Publication date: February 14, 2013
    Applicant: AUBERT & DUVAL
    Inventors: Christophe Daffos, Michel Miquel, Laurent Foucher, Vincent Albert
  • Patent number: 8252129
    Abstract: The invention relates to a method for transforming steel blanks. The invention in particular relates to a method for transforming a steel blank comprising kneading in order to obtain very good mechanical properties. The obtained products may notably be used for forming a pressure device component.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: August 28, 2012
    Assignee: Aubert & Duval
    Inventors: Gérald Gay, Bruno Gaillard-Allemand, Dominique Thierree
  • Publication number: 20120183432
    Abstract: A nickel superalloy has the following composition, the concentrations of the different elements being expressed as wt-%: Formula (I), the remainder consisting of nickel and impurities resulting from the production of the superalloy. In addition, the composition satisfies the following equation, wherein the concentrations of the different elements are expressed as atomic percent: Formula (II).
    Type: Application
    Filed: August 20, 2010
    Publication date: July 19, 2012
    Applicant: AUBERT & DUVAL
    Inventors: Alexandre Devaux, Philippe Heritier
  • 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
  • Publication number: 20120132326
    Abstract: A method of producing a martensitic steel including a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of a last heat shaping pass of the steel is lower than the solubility temperature of aluminum nitrides in the steel, and a treatment temperature for each potential heat treatment after the last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in the steel.
    Type: Application
    Filed: July 2, 2010
    Publication date: May 31, 2012
    Applicants: Snecma, Aubert & Duval
    Inventors: Laurent Ferrer, Philippe Heritier
  • Patent number: 8153056
    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 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: Grant
    Filed: April 20, 2006
    Date of Patent: April 10, 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