Patents Assigned to Deloro Stellite Holdings Corporation
  • Publication number: 20130297037
    Abstract: A surgical implant component comprising an implant component body manufactured from an alloy comprising from about 23 to about 33 wt % Cr, from about 8 to about 20 wt % Mo, from about 0.05 to about 1.5 wt % Si, from about 0.35 to about 3.5 wt % C, from about 40 to about 60 wt % Co, and incidental impurities. The implant component alloy has an atomic % ratio of (Cr+Mo+Nb)/Co of at least 0.59, a matrix metallurgical microstructure comprising between about 45% and about 85% by volume face-centered cubic structure, and between about 15% and about 55% by volume hexagonal close-packed structure; and a Rockwell C hardness of greater than 35. A method for manufacturing a surgical implant component body for a surgical implant by a manufacturing method selected from the group consisting of casting, forging, and powder metallurgy pressing-plus-sintering from an alloy.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 7, 2013
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Matthew Yao, Rachel Collier, Danie DeWet
  • Publication number: 20130149552
    Abstract: Forming a wear- and corrosion-resistant coating on an industrial component such as a chemical processing or nuclear power valve component by applying a cobalt-based dilution buffer layer to an iron-based substrate by slurry coating, and then applying by welding a cobalt-based build-up layer over the cobalt-based dilution buffer layer. An industrial component having a dilution buffer layer and a welding build-up layer thereover.
    Type: Application
    Filed: December 8, 2011
    Publication date: June 13, 2013
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Matthew Yao, Danie DeWet
  • Publication number: 20130129926
    Abstract: A method of imparting high-temperature, degradation resistance to a component associated with an internal combustion engine involving applying a metal slurry comprising a Co-based metallic composition, a binder, and a solvent to a surface of the component, and sintering the Co-based metallic composition to form a substantially continuous Co-based alloy coating on the surface of the body. An internal combustion engine component comprising a metallic substrate and a Co-based metallic coating thereon which has a thickness between about 100 and about 1000 microns.
    Type: Application
    Filed: January 16, 2013
    Publication date: May 23, 2013
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventor: Deloro Stellite Holdings Corporation
  • Publication number: 20120318399
    Abstract: A pipe or pipe fitting for use in harsh environment such as in petroleum refinery processes for cracking petroleum feedstocks, the pipe or pipe fitting comprising a 0.25 to 2.5 mm thick Co-based metallic coating on an internal surface of the pipe body, the coating having a hypereutectic microstructure characterized by carbides in a cobalt matrix and an average carbide grain size of less than 50 microns, and the Co-based metallic composition overlays the pipe internal surface at an interface which is free of heat-affected zone and which has a diffusion zone which is less than 0.002 inches thick.
    Type: Application
    Filed: June 17, 2011
    Publication date: December 20, 2012
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Matthew Yao, Louw DeJong, Danie DeWet
  • Publication number: 20110070119
    Abstract: A method for preparing an article is disclosed. The method comprises compacting a mixture of a first pre-alloyed powder and a lubricant to thereby form a green part having a green strength sufficient to permit mechanical handling; applying a slurry to a surface of the green part to thereby form a slurry coated green part, wherein the slurry comprises a second pre-alloyed powder, a binder, and a solvent; and heating the coated green part to a temperature below a solidus temperature of the first pre-alloyed powder and between a solidus temperature and a liquidus temperature of the second pre-alloyed powder to thereby solid state sinter the first pre-alloyed powder into a sintered core and to liquid state sinter the second pre-alloyed powder into a continuous alloy coating over the sintered core.
    Type: Application
    Filed: May 28, 2009
    Publication date: March 24, 2011
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Abdelhakim Belhadjhamida, Donald Williams, John Davies
  • Publication number: 20110067796
    Abstract: A method for preparing a metal-based part, the method comprising applying a slurry to a surface of a temporary substrate to thereby form a slurry-coated temporary substrate, wherein the slurry comprises a Co-, Ni-, or Fe-based metal-based material, a binder, and a solvent; drying the slurry-coated temporary substrate to remove the solvent and to thereby form a coating layer having green strength; heating the coating layer to remove the binder; heating the coating layer to sinter the metal-based material into a continuous metal alloy layer; and separating the substrate from the coating layer. A powder metallurgy preform comprising a powder metallurgy green coating on a preform substrate.
    Type: Application
    Filed: May 28, 2009
    Publication date: March 24, 2011
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Abdelhakim Belhadjhamida, Donald Williams, John Davies
  • Publication number: 20100316883
    Abstract: A wear- and corrosion-resistance coating over a metal substrate having a first-layer carbide material, a second metal coating layer over the first metal coating layer, and a surface metal coating layer over the second metal coating layer; and thermal spray method for applying the coating.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 16, 2010
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: David A. Lee, Heidi Lynette de Villiers-Lovelock, Danie Jacobus Dewet, James B. C. Wu
  • Publication number: 20100209286
    Abstract: A wear- and corrosion-resistant alloy, and related application method, where the alloy has by approximate weight %, C 0.12-0.7, Cr 20-30, Mo 7-15, Ni 1-4, and Co balance, wherein the alloy further contains one or more carbide-former elements from the group consisting of Ti, Zr, Hf, V, Nb, and Ta in a cumulative concentration to stoichiometrically offset between about 30% and about 90% of the C in the alloy.
    Type: Application
    Filed: July 11, 2008
    Publication date: August 19, 2010
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: James B. C. Wu, Matthew X. Yao
  • Patent number: 7572408
    Abstract: A Co—Mo—Cr Co-based alloy and overlay for wear and corrosion applications. The Mo:Si ratio is between about 15:1 and about 22:1 for enhanced ductility with a Laves phase.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: August 11, 2009
    Assignee: Deloro Stellite Holdings Corporation
    Inventors: James B. C. Wu, Matthew X. Yao
  • Publication number: 20090032501
    Abstract: A material blend for deposition of an abrasion-resistant overlay onto a metal substrate comprising a first metal particle component, a second metal particle component, and a carbide particle component and a method for the application thereof, wherein the overlay process conditions and the homogeneity of tungsten carbide distribution in the overlay are improved.
    Type: Application
    Filed: August 11, 2006
    Publication date: February 5, 2009
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Thomas Swingley, Kevin Luer, Roderick Webber, James B. C. Wu
  • Publication number: 20080193675
    Abstract: A method for imparting wear- and corrosion-resistance to a metal component comprising overlaying the component with a ductile Co-based alloy comprising between about 0.12 wt % and about 0.7 wt % C, between about 20 wt % and about 30 wt % Cr, between about 10 wt % and about 15 wt % Mo, between about 1 wt % and about 4 wt % Ni, and balance of Co, without forming cracks during the alloy's solidification.
    Type: Application
    Filed: May 30, 2007
    Publication date: August 14, 2008
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: James B.C. Wu, Volker Hellinger, Matthew X. Yao
  • Publication number: 20060134455
    Abstract: A method of imparting high-temperature, degradation resistance to a component associated with an internal combustion engine involving applying a metal slurry comprising a Co-based metallic composition, a binder, and a solvent to a surface of the component, and sintering the Co-based metallic composition to form a substantially continuous Co-based alloy coating on the surface of the body. An internal combustion engine component comprising a metallic substrate and a Co-based metallic coating thereon which has a thickness between about 100 and about 1000 microns.
    Type: Application
    Filed: December 15, 2005
    Publication date: June 22, 2006
    Applicant: Deloro Stellite Holdings Corporation
    Inventors: Abdelhakim Belhadjhamida, Joseph Overton, James Wu
  • Patent number: 6863990
    Abstract: Enhancing wear and corrosion resistance of an industrial component by depositing a Ni-based alloy coating having a thickness of at least about 50 microns onto a surface of the industrial component by high velocity oxyfuel propulsion of a Ni-based alloy powder containing a) Cr, b) from about 15 to about 25 wt % Mo, c) no more than about 1 wt % Fe, and d) no more than about 1 wt % elements having an atomic number greater than 42. A Ni-based alloy powder for HVOF deposition containing a) Cr, b) from about 15 to about 25 wt % Mo, c) no more than about 1 wt % Fe, and d) no more than about 1 wt % elements having an atomic number greater than 42. A Ni-based coating on an industrial component having enhanced corrosion and wear resistance.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: March 8, 2005
    Assignee: Deloro Stellite Holdings Corporation
    Inventors: James B. C. Wu, Matthew X. Yao
  • Patent number: 6852176
    Abstract: A Co-based alloy comprising 13-16 wt % Cr, 20-30 wt % Mo, 2.2-3.2 wt % Si, and balance Co, with a Cr:Si ratio of between about 4.5 and about 7.5, a Mo:Si ratio of between about 9 and about 15, wear resistance, and corrosion resistance in both oxidizing and reducing acids.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: February 8, 2005
    Assignee: Deloro Stellite Holdings Corporation
    Inventors: James B. C. Wu, Matthew X. Yao