Patents by Inventor Lars Arnberg

Lars Arnberg 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).

  • Method of reducing the formation of primary platelet-shaped beta-phase in iron containing alSi-alloys, in particular in Al-Si-Mn-Fe alloys
    Patent number: 6267829
    Abstract: The present invention is a method for producing an iron-containing hypoeutectic alloy free from primary platelet-shaped beta-phase of the Al5FeSi in the solidified structure by the steps (a) providing an iron-containing aluminum alloy having a composition within the following limits, in weight percent, 6-10% Si, 0.05-1.0% Mn, 0.4-2% Fe, at least one of 1) 0.01-0.8% Ti and/or Zr 2) 0.005-0.5% Sr and/or Na and/or Ba, 0-6.0% Cu, 0-2.0% Cr, 0-2.0% Mg, 0-6.0% Zn, 0-0.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: July 31, 2001
    Assignee: Opticast AB
    Inventors: Lennart Bäckerud, Lars Arnberg, Guocai Chai
  • Method for grain refining of aluminum and grain refining alloy
    Patent number: 5582791
    Abstract: The present invention relates to a method for grain refining of aluminium and aluminium alloys wherein a siliconboron alloy containing between 0.01 to 4.0 % by weight of boron is added to molten aluminium or aluminium alloy in such an amount that the resulting melt of aluminium or aluminium alloy contains at least 50 ppm boron. The invention further relates to a grain refining alloy for aluminium and aluminium alloys which grain refining alloy is a siliconboron alloy containing between 0.01 and 4.0 % by weight of boron.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: December 10, 1996
    Assignee: Elkem Aluminum ANS
    Inventors: Lars Arnberg, Gunnar Halvorsen, Per Arne T.o slashed.ndel
  • Grain refining alloy and a method for grain refining of aluminum and aluminum alloys
    Patent number: 5424031
    Abstract: The present invention relates to a method for grain refining of aluminium and aluminium alloys wherein a siliconboron alloy containing between 0.01 to 4.0% by weight of boron is added to molten aluminium or aluminium alloy in such an amount that the resulting melt of aluminium or aluminium alloy contains at least 50 ppm boron. The invention further relates to a grain refining alloy for aluminium and aluminium alloys which grain refining alloy is a siliconboron alloy containing between 0.01 and 4.0% by weight of boron.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: June 13, 1995
    Assignee: Elkem Aluminium ANS
    Inventors: Lars Arnberg, Gunnar Halvorsen, Per Arne Tondel