Patents Assigned to Shieldalloy Corporation
  • Patent number: 4648901
    Abstract: An additive is provided which enables metal additions to be made to aluminum melts with good metal recovery and speed of dissolution. The additive includes a mixture comprising:(a) an aluminum-comprising powder, for example commercially pure aluminum;(b) a powder of one or more metals or alloys comprising the metal or metals to be introduced, for example manganese, chromium, tungsten, molybdenum, titanium, vanadium, iron, cobalt, copper, niobium, tantalum, zirconium, hafnium and silver; and(c) a flux, for example one or more of potassium aluminum fluoride or potassium cryolite, potassium chloride, potassium fluoride, sodium chloride, sodium fluoride, and sodium carbonate.In a preferred form, the additive is a compacted tablet of components (a), (b) and (c), in the weight proportions of about 5%, 75% and 20%, respectively. The additive is especially useful in the method of the invention of introducing one or more metals into a melt comprising aluminum.
    Type: Grant
    Filed: July 17, 1985
    Date of Patent: March 10, 1987
    Assignee: Shieldalloy Corporation
    Inventors: Peter Murray, David Slinn
  • Patent number: 4564393
    Abstract: An additive is provided which enables metal additions to be made to aluminum melts with good metal recovery and speed of dissolution. The additive includes a mixture comprising:(a) an aluminum-comprising powder, for example commercially pure aluminum;(b) a powder of one or more metals or alloys comprising the metal or metals to be introduced, for example manganese, chromium, tungsten, molybdenum, titanium, vanadium, iron, cobalt, copper, niobium, tantalum, zirconium, hafnium and silver; and(c) a flux, for example one or more of potassium aluminum fluoride or potassium cryolite, potassium chloride, potassium fluoride, sodium chloride, sodium fluoride, and sodium carbonate.In a preferred form, the additive is a compacted tablet of components (a), (b) and (c), in the weight proportions of about 5%, 75% and 20%, respectively. The additive is especially useful in the method of the invention of introducing one or more metals into a melt comprising aluminum.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: January 14, 1986
    Assignee: Shieldalloy Corporation
    Inventors: Peter Murray, David Slinn
  • Patent number: 4472196
    Abstract: An addition agent and method are provided for adding alloying ingredients to a molten steel bath comprising a P/M compact formed of a compacted mixture of a particulate primary addition alloy and at least one secondary particulate metal. The primary particulate addition alloy is formed of a plurality of elemental metals at least one of which is present in substantial amounts and which primary addition alloy when added to the steel bath alone has a dissolution rate in said bath characteristic of said primary alloy.
    Type: Grant
    Filed: June 14, 1983
    Date of Patent: September 18, 1984
    Assignee: Shieldalloy Corporation
    Inventors: Stavros A. Argyropoulos, Paul D. Deeley