Patents by Inventor Bernard Bonnefois

Bernard Bonnefois has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hot rolled plate or forging of an austenitic steel
    Patent number: 11884997
    Abstract: A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking is provided. The hot rolled plate or austenitic steel includes a composition having in percentages by weight: 0.019%?C?0.030%, 0.5%?Mn?2%, 0.1%?Si?0.75%, Al?0.25%, 18%?Cr?25%, 14%?Ni?17%, 1.5%?Mo?3%, 0.001%?B?0.008%, 0.25%?V?0.35%, 0.23%?N?0.27%, the balance being iron and unavoidable impurities, Ni(eq.)?1.11 Cr(eq.)?8.24, Cr(eq)=Cr+Mo+1.5Si+5V+3Al+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87; x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: January 30, 2024
    Assignee: ArcelorMittal
    Inventors: Bernard Bonnefois, Amelie Fanica, Lionel Coudreuse, Tassa Oriana, Johannes Cornelis Van Wortel
  • HOT ROLLED PLATE OR FORGING OF AN AUSTENITIC STEEL
    Publication number: 20230040035
    Abstract: A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking is provided. The hot rolled plate or austenitic steel includes a composition having in percentages by weight: 0.019%?C?0.030%, 0.5%?Mn?2%, 0.1%?Si?0.75%, Al?0.25%, 18%?Cr?25%, 14%?Ni?17%, 1.5%?Mo?3%, 0.001%?B<0.008%, 0.25%?V?0.35%, 0.23%?N?0.27%, the balance being iron and unavoidable impurities, Ni(eq.)?1.11 Cr(eq.)?8.24, Cr(eq)=Cr+Mo+1.5Si+5V+3Al+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87; x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.
    Type: Application
    Filed: March 21, 2022
    Publication date: February 9, 2023
    Inventors: Bernard Bonnefois, Amelie Fanica, Lionel Coudreuse, Tassa Oriana, Johannes Cornelis Van Wortel
  • PROCESS FOR MANUFACTURING HOT-ROLLED PLATE, STRIP OR COIL MADE OF DUPLEX STAINLESS STEEL
    Publication number: 20190226068
    Abstract: The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight: C?0.05% 21%?Cr?25% 1%?Ni?2.95% 0.16%?N?0.28% Mn?2.0% Mo+W/2?0.50% Mo?0.45% W?0.15% Si?1.4% Al?0.05% 0.11%?Cu?0.50% S?0.010% P?0.040% Co?0.5% REM?0.1% V?0.5% Ti?0.1% Nb?0.3% Mg?0.1% the balance being iron and impurities resulting from the smelting, and the microstructure consisting of austenite and 35 to 65% ferrite by volume, the composition furthermore satisfying the following relationships: 40?IF?70 where IF=6×(% Cr+1.32×% Mo+1.27×% Si)?10×(% Ni+24×% C+16.15×% N+0.5×% Cu+0.4×% Mn)?6.17 and ILCR?30.5 where ILCR=% Cr+3.3×% Mo+16×% N+2.6×% Ni?0.7×% Mn, and also to a process for manufacturing plate, strip, coil, bar, rod, wire, sections, forgings and castings made of this steel.
    Type: Application
    Filed: April 1, 2019
    Publication date: July 25, 2019
    Inventors: Bernard BONNEFOIS, Jérôme PEULTIER, Mickael SERRIERE, Jean-Michel HAUSER, Eric CHAUVEAU
  • Hot Rolled Plate or Forging of an Austenitic Steel
    Publication number: 20180274067
    Abstract: A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking is provided. The hot rolled plate or austenitic steel includes a composition having in percentages by weight: 0.019%?C?0.030%, 0.5%?Mn?2%, 0.1%?Si?0.75%, Al?0.25%, 18%?Cr?25%, 14%?Ni?17%, 1.5%?Mo?3%, 0.001%?B?0.008%, 0.25%?V?0.35%, 0.23%?N?0.27%, the balance being iron and unavoidable impurities, Ni(eq.)?1.11 Cr(eq.)?8.24, Cr(eq)=Cr+Mo+1.5Si+5V+3Al+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87; x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.
    Type: Application
    Filed: May 29, 2018
    Publication date: September 27, 2018
    Inventors: Bernard Bonnefois, Amelie Fanica, Lionel Coudreuse, Tassa Oriana, Johannes Cornelis Van Wortel
  • DUPLEX STAINLESS STEEL
    Publication number: 20150167135
    Abstract: The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight: C?0.05% 21%?Cr?25% 1%?Ni?2.95% 0.16%?N?0.28% Mn?2.0% Mo+W/2?0.50% Mo?0.45% W?0.15% Si?1.4% Al?0.05% 0.11%?Cu?0.50% S?0.010% P?0.040% Co?0.5% REM?0.1% V?0.5% Ti?0.1% Nb?0.3% Mg?0.1% the balance being iron and impurities resulting from the smelting, and the microstructure consisting of austenite and 35 to 65% ferrite by volume, the composition furthermore satisfying the following relationships: 40?IF?70 where IF=6×(% Cr+1.32×% Mo+1.27×% Si)?10×(% Ni+24×% C+16.15×% N+0.5×% Cu+0.4×% Mn)?6.17 and ILCR?30.5 where ILCR=% Cr+3.3×% Mo+16×% N+2.6×% Ni?0.7×% Mn, and also to a process for manufacturing plate, strip, coil, bar, rod, wire, sections, forgings and castings made of this steel.
    Type: Application
    Filed: February 13, 2015
    Publication date: June 18, 2015
    Inventors: Bernard BONNEFOIS, Jérôme PEULTIER, Mickael SERRIERE, Jean-Michel HAUSER, Eric CHAUVEAU
  • HEAT-RESISTANT AUSTENITIC STEEL HAVING HIGH RESISTANCE TO STRESS RELAXATION CRACKING
    Publication number: 20120237389
    Abstract: An austenitic steel not susceptible to relaxation cracking, with composition comprising, in percentages by weight: 0.019% ?C ?0.030%, 0.5% ?Mn ?2%, 0.1% ?Si ?0.75%, Al >0.25%, 18% ?Cr ?25%, 12% ?Ni ?20%, 1.5% ?Mo ?3%, 0.001 % <B ?0.008%, 0.25% ?V ?0.35%, 0.23% ?N ?0.27%, the balance being iron and unavoidable impurities wherein: Ni(eq.) ?1.11 Cr(eq.) ?8.24, wherein: Cr(eq)=Cr+Mo+1.5 Si+5V+3AI+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87 wherein: x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.
    Type: Application
    Filed: July 20, 2010
    Publication date: September 20, 2012
    Applicants: ArcelorMittal Investigacion y Desarrollo SL, Netherlands Org. for Applied Sci. Research (TNO), Centro Sviluppo Materiali S.P.A.
    Inventors: Bernard Bonnefois, Amelie Fanica, Lionel Coudreuse, Tassa Oriana, Johannes Cornelis Van Wortel
  • DUPLEX STAINLESS STEEL
    Publication number: 20100000636
    Abstract: The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight: C?0.05% 21%?Cr?25% 1%?Ni?2.95% 0.16%?N?0.28% Mn?2.0% Mo+W/2?0.50% Mo?0.45% W?0.15% Si?1.4% Al?0.05% 0.11%?Cu?0.50% S?0.010% P?0.040% Co?0.5% REM?0.1% V?0.5% Ti?0.1% Nb? 0.3% Mg?0.1% the balance being iron and impurities resulting from the smelting, and the microstructure consisting of austenite and 35 to 65% ferrite by volume, the composition furthermore satisfying the following relationships: 40?IF?70 where IF=6×(% Cr+1.32×% Mo+1.27×% Si)?10×(% Ni+24×% C+16.15×% N+0.5×% Cu+0.4×% Mn)?6.17 and ILCR?30.5 where ILCR=% Cr+3.3×% Mo+16×% N+2.6×% Ni?0.7×% Mn, and also to a process for manufacturing plate, strip, coil, bar, rod, wire, sections, forgings and castings made of this steel.
    Type: Application
    Filed: June 15, 2007
    Publication date: January 7, 2010
    Applicants: INDUSTEEL CREUSOT, UGITECH
    Inventors: Bernard Bonnefois, Jerome Peultier, Mickael Serriere, Jean-Michel Hauser, Eric Chauveau
  • Welding electrode made of a nickel-based alloy and the corresponding alloy
    Patent number: 6447716
    Abstract: Nickel-based alloy useful for welding, welding method, and welding electrode.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: September 10, 2002
    Assignees: Ugine-Savoie Imphy, Sprint Metal-Societe de Production Internationale de Trefiles
    Inventors: Ricardo Cozar, Albert Bruyere, Bernard Bonnefois