Patents Assigned to Ugine SA
  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Patent number: 6921440
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to: cold rolling of the hot sheet metal with or without preliminary annealing, final annealing of the sheet-metal strip at a temperature of between 800° C. and 1100° C. for a duration of between 1 minute and 5 minutes and preferably at a temperature of about 1050° C. for a time of about 2 minutes. Steel and exhaust manifold.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: July 26, 2005
    Assignee: Ugine SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu
  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Publication number: 20020129877
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to:
    Type: Application
    Filed: March 14, 2002
    Publication date: September 19, 2002
    Applicant: UGINE SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu
  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Patent number: 6423159
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to: cold rolling of the hot sheet metal with or without preliminary annealing, final annealing of the sheet-metal strip at a temperature of between 800° C. and 1100° C. for a duration of between minute and 5 minutes and preferably at a temperature of about 1050° C. for a time of about 2 minutes. Steel and exhaust manifold.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: July 23, 2002
    Assignee: Ugine SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu
  • Corrosion-resistant low-nickel austenitic stainless steel
    Patent number: 6274084
    Abstract: Corrosion-resistant low-nickel austenitic stainless steel having the following compostion in percentages by weight: 0.01%<carbon<0.08%, 0.1%<silicon<1%, 5%<manganese<11%, 15%<chromium<17.5%, 1%<nickel<4%, 1%<copper<4%, 1×10−4%<sulfur<20×10−4%, 1×10−4%<calcium<50×10−4%, 0%<aluminum<0.03%, 0.005%<phosphorus<0.1%, boron<5×10−4%, oxygen<0.01%, the balance being iron and impurities resulting from the smelting operation.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: August 14, 2001
    Assignees: Ugine SA, Ugine-Savoie Imphy
    Inventor: Pascale Haudrechy
  • Process for producing a foaming slag above a stainless steel melted in an electric furnace
    Patent number: 6228137
    Abstract: A process for producing a foaming slag above a stainless steel melted in an electric furnace, in which: a powder containing at least one metal oxide and carbon in its composition is introduced into the slag, at least one oxide present in the powder is reduced by its reaction with the carbon to form in the slag bubbles composed of the metal of the metal oxide and of carbon monoxide, the bubbles present in the slag giving rise to a slag in the form of a stable foam.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: May 8, 2001
    Assignees: Ugine-Savoie Imphy, Ugine SA
    Inventors: Yves Guillot, Luc Sollier, Olivier Bletton, Frederic Descaves