Patents Assigned to Creusot-Loire
  • Patent number: 6322642
    Abstract: Process for manufacturing a pressure vessel intended to work under pressure between −40° C. and 200° C. in the presence of H2S under conditions defined by the NACE MR 0175-97 standard, in which: components of the vessel are manufactured from a steel of chemical composition: 0.03%≦C≦0.15%; 0%≦Si≦0.5%; 0.4%≦Mn≦2.5%; 0.5%≦Ni≦3%; 0%≦Cr≦1%; 0%≦Mo≦0.5%; 0%≦Al≦0.070%; 0%≦Ti≦0.04%; 0%≦B≦0.004%; 0%≦V≦0.02%; 0%≦Nb≦0.05%; Cu≦1%; S≦0.015%; P≦0.03%; the balance being iron and impurities resulting from the smelting operation; CET=C+(Mn+Mo)/10+(Cr+Cu)/20+Ni/40<0.35; 800/500 cct<10 s; the components being quenched and tempered; the structure is martensitic or martensitic-bainitic with less than 10% ferrite; the temper temperature is <680° C. Optionally, a stress-relieving operation is carried out at a temperature ≧595° C.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: November 27, 2001
    Assignee: Creusot Loire Industrie
    Inventors: Pierre Bocquet, Philippe Mabelly, Philippe Bourges
  • Patent number: 5997665
    Abstract: A block is produced by juxtaposition and joining of at least one plate made of tool steel and of at least one plate made from mild steel. The block is hot rolled and then it is cooled to a temperature below 200.degree. C. The rolled block is tempered at a temperature above 450.degree. C. after cooling. The clad sheet obtained includes a layer made of tool steel having a tempered martensitic structure and containing primary carbides and a fine dispersion of secondary carbides.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: December 7, 1999
    Assignee: Creusot Loire Industrie
    Inventors: Jean-Georges Brisson, Jean Beguinot
  • Patent number: 5972129
    Abstract: Process for smelting a titanium steel according to which a liquid steel containing more than 0.003% of nitrogen and not containing titanium is smelted and then more than 0.005% of titanium is introduced into the liquid steel by progressive diffusion from an oxidized phase containing titanium and the steel is solidified. Steel obtained by the process.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: October 26, 1999
    Assignee: Creusot Loire Industrie
    Inventors: Jean Beguinot, Jean-Luc Beau, Marie-Luce Nectoux
  • Patent number: 5908710
    Abstract: A block is produced by juxtaposition and joining of at least one plate made of tool steel and of at least one plate made from mild steel. The block is hot rolled and then it is cooled to a temperature below 200.degree. C. The rolled block is tempered at a temperature above 450.degree. C. after cooling. The clad sheet obtained includes a layer made of tool steel having a tempered martensitic structure and containing primary carbides and a fine dispersion of secondary carbides.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: June 1, 1999
    Assignee: Creusot Loire Industrie
    Inventors: Jean-Georges Brisson, Jean Beguinot
  • Patent number: 5855845
    Abstract: Steel for the manufacture of molds for injection molding of plastics, wherein its chemical composition contains, by weight: 0.35%.ltoreq.C.ltoreq.0.5%, 0%.ltoreq.Si.ltoreq.0.5%, 0.2%.ltoreq.Mn.ltoreq.2.5%, 0%.ltoreq.Ni.ltoreq.4%, 0%.ltoreq.Cr.ltoreq.4%, 0%.ltoreq.Mo+W/2.ltoreq.2%, 0%.ltoreq.Cu.ltoreq.1%, 0%.ltoreq.V+Nb/2+Ta/4.ltoreq.0.5%, 0.005%.ltoreq.Al.ltoreq.0.2%, 0%.ltoreq.B.ltoreq.0.015%, 0%.ltoreq.Ti+Zr/2.ltoreq.0.3%, 0%.ltoreq.S+Se+Te .ltoreq.0.2%, 0%.ltoreq.Pb+Bi.ltoreq.0.2%, 0%.ltoreq.Ca.ltoreq.0.1%, the remainder being iron and impurities resulting from the production, the analysis simultaneously satisfying the following relationships: Cr+3.times.(Mo+W/2)+10.times.(V+Nb/2+Ta/4).gtoreq.1, R=3.8.times.C+10.times.Si+3.3.times.Mn+2.4.times.Ni+1.4.times.(Cr+Mo+W/2). ltoreq.11, Qu=3.8.times.C+1.1.times.Mn+0.7.times.Ni+0.6.times.Cr+1.6.times.(Mo+W/2)+k B.gtoreq.3, with kB=0.5 if B.gtoreq.0.0005% and kB=0 if not, and: R.ltoreq.Max(2.33.times.Qu-1, 0.9.times.Qu+4).
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: January 5, 1999
    Assignee: Creusot Loire Industrie Societe Anonyme
    Inventors: Jean Beguinot, Gilbert Primon, Frederic Chenou
  • Patent number: 5855846
    Abstract: Steel for the manufacture of molds, and especially of molds for injection molding of plastics, whose chemical composition comprises, by weight: 0.17%.ltoreq.C.ltoreq.0.27%, 0%.ltoreq.Si.ltoreq.0.5%, 0%.ltoreq.Mn.ltoreq.2%, 0%.ltoreq.Ni.ltoreq.2%, 0%.ltoreq.Cr.ltoreq.3%, 0%.ltoreq.Mo+W/2.ltoreq.1.5%, 0%.ltoreq.V+Nb/2+Ta/4.ltoreq.0.5%, 0.002%.ltoreq.B.ltoreq.0.015%, 0.005%.ltoreq.Al.ltoreq.0.2%, optionally at least one element taken from sulfur, selenium and tellurium, the sum of the contents of these elements being smaller than or equal to 0.2% optionally at least one element taken from titanium and zirconium, in contents such that the sum of the titanium content and of half the zirconium content is smaller than or equal to 0.3%, optionally at least one element taken from lead and bismuth, the sum of the contents of these elements being smaller than or equal to 0.2%, optionally calcium in a content lower than or equal to 0.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: January 5, 1999
    Assignee: Creusot Loire Industrie
    Inventors: Jean Beguinot, Gilbert Primon, Frederic Chenou
  • Patent number: 5785924
    Abstract: Steel useful for the manufacture of molds for the injection molding of plastics, the chemical composition of which includes, by weight: 0.03%.ltoreq.C.ltoreq.0.25%, 0%.ltoreq.Si.ltoreq.0.2%, 0%.ltoreq.Mn.ltoreq.0.9%, 1.5%.ltoreq.Ni.ltoreq.5%, 0%.ltoreq.Cr.ltoreq.18%, 0.05%.ltoreq.Mo+W/2.ltoreq.1%, 0%.ltoreq.S.ltoreq.0.3%, at least one element chosen from Al and Cu in contents of between 0.5% and 3%, optionally 0.0005%.ltoreq.B.ltoreq.0.015%, optionally at least one element taken from V, Nb, Zr, Ta and Ti, in contents of between 0% and 0.3%, optionally at least one element taken from Pb, Se, Te and Bi, in contents of between 0% and 0.3%, the remainder being iron and impurities resulting from the processing, especially nitrogen; the chemical composition additionally satisfying the relations: Kth=3.8.times.C+9.8.times.Si+3.3.times.Mn+2.4.times.Ni+.alpha..times.Cr+1. 4.times.(Mo+W/2).ltoreq.15, with .alpha.=1.4 if Cr<8% and .alpha.=0 if Cr.gtoreq.8%; Tr=3.8.times.C+1.07.times.Mn+0.7.times.Ni+0.57.times.Cr+1.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: July 28, 1998
    Assignee: Creusot Loire Industrie
    Inventors: Jean Beguinot, Frederic Chenou, Gilbert Primon
  • Patent number: 5714116
    Abstract: A steel composition useful for the manufacture of articles and components having high abrasion resistance.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: February 3, 1998
    Assignee: Creusot Loire Industrie (Societe Anonyme)
    Inventors: Jean Beguinot, Jean-Georges Brisson
  • Patent number: 5695576
    Abstract: High-strength high-ductility steel whose chemical composition, by weight, comprises from 0.15% to 0.35% of carbon, from 0% to 3% of silicon, from 0% to 3% of aluminium, from 0.1% to 4.5% of manganese, from 0% to 9% of nickel, from 0% to 6% of chromium, from 0% to 3% of the sum of tungsten divided by two plus molybdenum, from 0% to 0.5% of vanadium, from 0% to 0.5% of niobium, from 0% to 0.5% of zirconium, at most 0.3% of nitrogen and, optionally, from 0.0005% to 0.005% of boron, optionally from 0.005% to 0.1% of titanium, optionally at least one element taken from Ca, Se, Te, Bi and Pb in contents less than 0.2%, the balance being iron and impurities resulting from smelting; the chemical composition furthermore satisfying the relationships: 1%.ltoreq.Si+Al.ltoreq.3% and 4.6.times.(%C)+1.05.times.(%Mn)+0.54.times.(%Ni)+0.66.times.(%Mo+%W/2)+0.5 .times.(%Cr)+K.gtoreq.3.8 where K=0.5 when the steel contains boron, K=0 when the steel does not contain boron.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: December 9, 1997
    Assignee: Creusot Loire Industrie (S.A.)
    Inventor: Jean Beguinot
  • Patent number: 5683821
    Abstract: The workpiece is obtained by cutting a metal product by oxygen cutting. An oxygen cutting jet is sent onto a preheated cutting zone of the product. A peripheral sleeve of additional gas is formed around the oxygen cutting jet so as to send, into the cutting zone, a coaxial double jet constituted by the oxygen jet surrounded by the sleeve of gas at a pressure of less than 1 bar. The flow rate and the pressure of the cutting oxygen and of the additional gas are regulated separately. The invention also relates to an oxygen-cutting device for implementing the method and to the metal part obtained.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: November 4, 1997
    Assignee: Creusot-Loire Industrie
    Inventors: Dominique Vial, Gerard Defay, Michel Blanchet
  • Patent number: 5645794
    Abstract: Low alloy steel for the manufacture of molds for plastics or for rubber, the chemical composition of which comprises, by weight, 0.24% to 0.35% of carbon, 1% to 2.5% of manganese, 0.3% to 2.5% of chromium, 0.1% to 0.8% of molybdenum plus tungsten divided by 2, up to 2.5% of nickel, 0% to 0.3% of vanadium, less than 0.5% of silicon, 0.002% to 0.005% of boron, 0.005% to 0.1% of aluminum, 0% to 0.1% of titanium and less than 0.02% of phosphorus. The chemical composition must furthermore satisfy the relationship:U=409(% C)+19.3[% Cr+% Mo+% W/2+% V]+29.4(% Si)+10(% Mn)+7.2(% Ni)<200and the relationship:R=3.82(% C)+9.79(% Si)+3.34(% Mn)+11.94(% P)+2.39(% Ni)+1.43(% Cr)+1.43(% Mo+% W/2)<11.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: July 8, 1997
    Assignee: Creusot Loire Inudstrie
    Inventors: Jean Beguinot, Frederic Chenou, Gilbert Primon
  • Patent number: 5494636
    Abstract: The invention provides a steel containing by weight 23% .ltoreq.Cr.ltoreq.28%; 15%.ltoreq.Ni.ltoreq.28%; 0.5%.ltoreq.Mn.ltoreq.6%; 3%.ltoreq.Mo.ltoreq.8%; 0.35%.ltoreq.N.ltoreq.0.8%; and 1%.ltoreq.W.ltoreq.5%. The steel has a high resistance to corrosion and may be used for manufacturing massive parts for any application, in particular for manufacturing equipment for oil platforms and chemical works, containers for transporting corrosive products, ship hulls and ply sheets.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: February 27, 1996
    Assignees: Creusot-Loire Industrie, Tecphy
    Inventors: Francois Dupoiron, Jean-Christophe Gagnepain, Richard Cozar, Bernard Mayonobe
  • Patent number: 5480609
    Abstract: The steel contains, in proportions by weight, from 20 to 30% of chromium, from 25 to 32% of nickel, from 3 to 7% of molybdenum, from 0.35 to 0.8% of nitrogen, from 0.5 to 5.4% of manganese, up to 0.06% of carbon and up to 1% of silicon. Because of its multifariousness of corrosion resistance the steel can be employed in particular for the manufacture of equipment for removing pollutants from fumes, of equipment for the paper pulp industry, for the chemical industry or for petroleum exploitation, for seawater plants and for the manufacture of tankers for transporting corrosive products. The steel has a very high structural stability.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: January 2, 1996
    Assignee: Creusot-Loire Industrie
    Inventors: Francois Dupoiron, Jean-Christophe Gagnepain, Michel Verneau
  • Patent number: 5391237
    Abstract: The workpiece is obtained by cutting a metal product by oxygen cutting. An oxygen cutting jet is sent onto a preheated cutting zone of the product. A peripheral sleeve of additional gas is formed around the oxygen cutting jet so as to send, into the cutting zone, a coaxial double jet constituted by the oxygen jet surrounded by the sleeve of gas at a pressure of less than 1 bar. The flow rate and the pressure of the cutting oxygen and of the additional gas are regulated separately. The invention also relates to an oxygen-cutting device for implementing the method and to the metal part obtained.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: February 21, 1995
    Assignee: Creusot-Loire Industrie
    Inventors: Dominique Vial, Gerard Defay, Michel Blanchet
  • Patent number: 5376464
    Abstract: The clad sheet comprises a first layer or cladding of an iron-base or nickel-base alloy including at least 11% chromium and at least 17% nickel and resisting corrosion by very corrosive mediums such as acids, and a second layer or base of austenitic stainless steel including at least 11% chromium and at the most 17% nickel resisting atmospheric corrosion. The clad sheets may be cold re-rolled down to a thickness of 2 mm.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: December 27, 1994
    Assignee: Creusot-Loire Industrie
    Inventors: Francois Dupoiron, Daniel Jobard
  • Patent number: 5255732
    Abstract: Lower structure of a mould for the pressure casting of flat products such as slabs and method for mount and removing the lower spacer of this mould is provided. The lower structure of the mould includes an intermediate beam (26) resting freely on a frame (3) whose upper surface opposite to its surface bearing on the frame (3) carries a lower spacer (4) which is fixed by clips (37) on the beam (26). At least one positioning pin (54) is engaged in a housing (55) at the front part of the frame (3). A plurality of members (47) for holding the intermediate beam (26) on the frame are distributed according to the length of the beam (26). These members each comprise a part (46) which can be engaged longitudinally in a coupling device (45) attached to the beam (26) and which can be actuated in order to hold the beam (26) on the frame (3) or, on the other hand, in order to release it.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: October 26, 1993
    Assignees: Creusot-Loire Industrie, Clecim
    Inventors: Robert A. Vatant, Michel F. Courbier, Luc H. Bertin
  • Patent number: 5233125
    Abstract: An apparatus for controlling the automatic loading of a gun of an armored vehicle gun turret has a rotating magazine, a rammer, at least one munitions type sensor, a selection unit, a control unit, and a managing device. The rotating magazine has cells for storing munitions, and is disposed in proximity to a chamber of the gun. The rammer rams munitions stored in the rotating magazine towards a chamber of the gun. The munition type sensor detects a type of munition stored in a cell of the rotating magazine. The selection unit selects a type of munition to be used. The control unit controls the rotating magazine to position a selected type of munition for loading into the chamber of the gun, the rammer to ram the selected type of munition towards the chamber of the gun, and a transfer of the selected munition from the rammer towards the chamber of the gun.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: August 3, 1993
    Assignee: Creusot-Loire Industrie
    Inventors: Gerard Bouver, Alain Larochette, Mohamad Ben-Ahmed
  • Patent number: 5221374
    Abstract: The agent in question is cobalt added in contents of between 0.05% and 2% to steels containing from 0.05% to 0.6% of carbon and less than 10% of alloying elements taken from silicon, manganese, nickel, chromium and molybdenum, to produce optionally normalized blocks, plates, bars or pieces of large size, with improved hydrogen cracking resistance and with improved weld-ability and suitability for thermal cutting. The invention also relates to a process for employing the agent and to the pieces thus obtained.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: June 22, 1993
    Assignee: Creusot Loire Industrie
    Inventors: Regis Blondeau, Jean Beguinot, Philippe Bourges, Lionel Coudreuse, Gilbert Primon, Jacques Charles
  • Patent number: 5213905
    Abstract: Plating is carried out of a stainless steel sheet whose carbide redissolution temperature is lower than 1000.degree. C. onto an armor steel sheet and the plated sheet obtained is quenched so that the Brinell hardness of the armor steel is between 250 and 700 BH. The plating may be carried out by corolling, explosion plating or explosion plating followed by rerolling. Tempering may be performed at a temperature between 200.degree. and 600.degree. C. on the plated and quenched sheet. The quenching is preferably carried out on an oil quenching machine under a press. The armors obtained comprise a stainless coating layer free from carbide precipitates at the grain boundaries. Storage tanks which resist projectiles and are employed for storing liquid corrosive products can be made from the stainless armors according to the invention.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: May 25, 1993
    Assignee: Creusot-Loire Industrie
    Inventors: Jacques Leger, Remi Roux, Gilbert Schweitzer
  • Patent number: 5180538
    Abstract: Device and method for feeding molten metal for the pressure casting of metal products.The device for feeding molten metal to a mould 1 of a continuous pressure-casting installation comprises a vessel 2 equipped with a cover 7 carrying a spout 3, the said vessel resting on a frame 4 and comprising a framework 9 for supporting a ladle 10 of molten metal, means for weighing the said ladle and means 20 for raising the said framework.The casting method implementing this device is characterized in that, during the cast, when the quantity of metal in the ladle 10 is greater than a specific quantity, the ladle is held in a low position (position according to reference 32) and, when the quantity of metal becomes less than the said specific quantity, the ladle is raised (position 32') so as to hold the lower end 31 of the spout below the level of the metal contained in the ladle.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: January 19, 1993
    Assignees: Creusot-Loire Industrie, Clecim
    Inventors: Robert A. Vatant, Michel F. Courbier, Andre Weiss