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| Number | Title | Issue Date |
| 7740682 | High-density composite material containing tungsten powder An improved composite material, and method of manufacture thereof, comprising varying amounts tungsten powder, or metal/alloy powder of similar density, and clay or silicone is disclosed. The improved composite material may be useful as a replacement for lead and le... | 06/22/2010 |
| 7615094 | Tungsten-based sintered material having high strength and high hardness, and hot press mold used for optical glass lenses A first tungsten-based sintered material of the present invention comprises Ni in a range from 0.2 to 1.5% by mass, Y2O3 in a range from 0.1 to 1% by mass, and optionally, (a) VC in a range from 0.05 to 0.5% by mass and/or (b) Co and/or Fe in a... | 11/10/2009 |
| 7383776 | System and method for processing ferrotungsten and other tungsten alloys, articles formed therefrom and methods for detecting the same Systems and methods for refining or otherwise processing tungsten alloys, including ferrotungsten powder and articles formed therefrom, and methods for detecting the presence of the same. The methods include at least one of magnetically-separating and particle-size-... | 06/10/2008 |
| 7361412 | Nanostructured soldered or brazed joints made with reactive multilayer foils Self-propagating formation reactions in nanostructured multilayer foils provide rapid bursts of heat at room temperature and therefore can act as local heat sources to melt solder or braze layers and join materials. This reactive joining method provides very localiz... | 04/22/2008 |
| 7360488 | Single phase tungsten alloy A single phase metal alloy usually for forming a shaped charge liner for a penetrating jet or explosively formed penetrator forming warhead consists essentially of from a trace to 90%, by weight, of cobalt, from 10% to 50% by weight, of tungsten, and the balance nic... | 04/22/2008 |
| 7361239 | High-density metallic-glass-alloys, their composite derivatives and methods for making the same The invention includes a method for producing high-density composites of metallic glass alloy powders in combination with a refractory metal powder, and includes related methods for producing metallic glass alloys. The invention, in one aspect, employs a system of m... | 04/22/2008 |
| 7328658 | Slug for industrial ballistic tool A frangible projectile for expelling from an industrial ballistic tool may be formed by a powder metallurgy process. A preferred embodiment of slug consists essentially of compacted and optionally sintered material and comprises up to 35% ferrotungsten in particulat... | 02/12/2008 |
| 7329382 | Methods for producing medium-density articles from high-density tungsten alloys Methods for producing medium-density articles from recovered high-density tungsten alloy (WHA) material, and especially from recovered WHA scrap. In one embodiment of the invention, the method includes forming a medium-density alloy from WHA material and one or more... | 02/12/2008 |
| 7247780 | Wrench tremolo bar for a guitar A guitar has a wrench tremolo bar thereon, replacing the standard tremolo bar, with the wrench tremolo bar having a desired wrench on at least one end of the wrench tremolo bar, to cooperate with the string fasteners on the guitar, which greatly facilitates tuning, ... | 07/24/2007 |
| 7226492 | High-powder tungsten-based sintered alloy Tungsten-based alloy material sintered at a high sintering power that may contain additive elements soluble in the nickel and selected from the group constituted, for example, by rhenium, molybdenum, tantalum, niobium, vanadium or a mixture of these, wherein, after ... | 06/05/2007 |
| 7175803 | X-ray tube and method of manufacture The present invention is directed to methods of manufacturing an x-ray tube component, such as an evacuated housing and the like. The component has a radiation shielding layer, which is comprised of a plurality of powder metals, at least one of which is comprised of... | 02/13/2007 |
| 7172725 | W-Cu alloy having homogeneous micro-structure and the manufacturing method thereof In W—Cu alloy having a homogeneous micro-structure and a fabrication method thereof, the method includes forming mixed powders by mixing tungsten powders with W—Cu composite powders; forming a compact by pressurizing-forming the mixed powders; forming a skeleton... | 02/06/2007 |
| 7159519 | Slug for industrial ballistic tool A frangible projectile for expelling from an industrial ballistic tool may be formed by a powder metallurgy process. A preferred embodiment of slug consists essentially of compacted and optionally sintered material and comprises up to 35% ferrotungsten in particulat... | 01/09/2007 |
| 7059233 | Tungsten-containing articles and methods for forming the same Tungsten-containing articles and manufacturing processes for tungsten-containing articles. The articles may include firearms projectiles, such as shot, shot slugs, bullets, big game bullets, lead-equivalent bullets, black powder bullets, etc.; radiation shields; and... | 06/13/2006 |
| 7000524 | Method for manufacture of a multi-part projectile for gun ammunition and product produced thereby A method for the manufacture of a projectile for small-bore weapons ammunition comprising the steps of producing a compact from a mixture of a heavy metal powder and a light metal powder at room temperature, and without further treatment of the compact, introducing ... | 02/21/2006 |
| 6981996 | Tungsten-tin composite material for green ammunition A tungsten-tin composite for green (lead-free) ammunition is provided wherein the composite is made with a spheroidized tungsten powder and has mechanical properties similar to those of lead. The composite may be fully densified at pressures less than about 250 MPa ... | 01/03/2006 |
| 6960319 | Tungsten alloys for penetrator application and method of making the same Disclosed is a flow-softening tungsten alloy having the general formula: W100-pAiBjCkDe wherein W is tungsten; A is one or more elements selected from the ... | 11/01/2005 |
| 6930391 | Method for alloy-electroplating group IB metals with refractory metals for interconnections An electroplated metal alloy including at least three elements. A multilayer interconnection structure that includes a substrate that is an interior of the interconnection structure, a conductive seed layer exterior to the substrate, and an electroplated metal alloy... | 08/16/2005 |
| 6884276 | Methods for producing medium-density articles from high-density tungsten alloys Methods for producing medium-density articles from recovered high-density tungsten alloy (WHA) material, and especially from recovered WHA scrap. In one embodiment of the invention, the method includes forming a medium-density alloy from WHA material and one or more... | 04/26/2005 |
| 6830637 | Large diameter tungsten-lanthana rod A large-diameter tungsten-lanthana rod having an elongated grain structure substantially parallel to the longitudinal axis of the rod is described. The large diameter rod is produced by rolling at a temperature greater than 1400° C. and less than 1700° C. to achie... | 12/14/2004 |
| 6827756 | Tungsten heavy alloy for penetrating splinter shell and forming method thereof Disclosed are a tungsten material for a penetrating splinter shell and forming method thereof enabling a penetrator to perforate a hard target on high-speed impact as well as having the following splinter cause a severe damage on an inner component by changing a bre... | 12/07/2004 |
| 6749802 | Pressing process for tungsten articles A manufacturing process for articles that are formed from powders containing tungsten and at least one binder. The manufacturing process includes compacting the mixture of powders under a first pressure to yield a desired intermediate structure, then reshaping the s... | 06/15/2004 |
| 6589310 | High conductivity copper/refractory metal composites and method for making same The thermal conductivity, thermal conductivity, of a sintered copper/refractory metal composite having a maximum porosity of about 1% is greatly improved when the composite contains phosphorus and sintering aid in a specified weight ratio, "phosphorus/sin... | 07/08/2003 |
| 6576037 | Metal micropowders based on tungsten and/or molybdenum and 3D transition metals The invention concerns a pre-alloyed metal powder consisting essentially of tungsten and/or molybdenum, at least one transition metal selected among iron, cobalt, nickel and copper, and optionally at least one additive, the iron content being less than 50... | 06/10/2003 |
| 6551375 | Ammunition using non-toxic metals and binders Tungsten powder is mixed with a second powder metal and a binder to be used as small arms projectiles and shot pellets for use in shot guns which is cost effective to produce and which can perform ballistically. Ballistic performance equal to or superior ... | 04/22/2003 |
| 6527824 | Method for manufacturing tungsten-based materials and articles by mechanical alloying A method of producing a high-density article is presented comprising selecting one or more primary tungsten-containing constituents with densities greater than 10.0 g/cc and one or more secondary constituents with densities less than 10.0 g/cc, co-milling... | 03/04/2003 |
| 6478842 | Preparation of articles using metal injection molding A process for preparation of molded articles, such as golf club heads, by metal injection molding and the resulting product.... | 11/12/2002 |
| 6447715 | Methods for producing medium-density articles from high-density tungsten alloys Methods for producing medium-density articles from recovered high-density tungsten alloy (WHA) material, and especially from recovered WHA scrap. In one embodiment of the invention, the method includes forming a medium-density alloy from WHA material and ... | 09/10/2002 |
| 6436550 | Sintered compact and method of producing the same A highly reliable sintered compact which can be readily and safely produced, and a method for producing such sintered compact are provided. The sintered compact is preferably formed into a heat sink 1 which comprises a heat sink main body 2. The heat sink... | 08/20/2002 |
| 6413294 | Process for imparting high strength, ductility, and toughness to tungsten heavy alloy (WHA) materials A method of imparting high strength, high ductility, and high fracture toughness to a refractory metal alloy workpiece includes: (i) subjecting the workpiece to at least one pass that reduces the initial cross-sectional area of said workpiece, (ii) anneal... | 07/02/2002 |
| 6375708 | Alloy for electrical contacts and electrodes and method of making A W--Cu--Ni alloy having thermophysical properties suitable for use in electrical contacts and electrodes is described. The alloy is formed by direct sintering of a powder blend comprising a tungsten-copper composite powder and a nickel powder. The tungst... | 04/23/2002 |
| 6368376 | Process for making oxide dispersion-strengthened tungsten heavy alloy by mechanical alloying Disclosed is a process for making an oxide dispersion-strengthened tungsten heavy alloy by mechanical alloying that includes the steps of: adding 0.1 to 5 wt. % of Y2 O3 powder to a mixed powder comprising more than 90 wt. % of tungs... | 04/09/2002 |
| 6312495 | Powder-metallurgically produced composite material and method for its production The present invention relates to a powder-metallurgically produced composite material comprising a matrix and a granular additive comprising at least one fine-grained refractory metal with an average grain size of at most 2 μm uniformly distributed in th... | 11/06/2001 |
| 6270549 | Ductile, high-density, non-toxic shot and other articles and method for producing same Ductile, high-density, non-toxic W--Ni--Mn--Fe alloy compositions and methods of manufacture by which they may be converted to shot (for use in shotshells) and other useful products traditionally made of lead alloys are presented. Product of the present i... | 08/07/2001 |
| 6261336 | Stable aqueous iron based feedstock formulation for injection molding A composition for forming molded metal containing articles having improved stability. More particularly, a corrosion resistant composition for forming injection molded articles having a sodium silicate corrosion inhibiting additive. The corrosion inhibito... | 07/17/2001 |
| 6248150 | Method for manufacturing tungsten-based materials and articles by mechanical alloying A method of producing a high-density article is presented comprising selecting one or more primary tungsten-containing constituents with densities greater than 10.0 g/cc and one or more secondary constituents with densities less than 10.0 g/cc, co-milling... | 06/19/2001 |
| 6218025 | Sintering electrode A sintered electrode of high-melting metal (for example tungsten) is produced from spherical metal powder having a well defined particle size. The mean particle size is from 5 to 70 μm. The particle size distribution covers a range from at most 20% below... | 04/17/2001 |
| 6156093 | High strength, ductility, and toughness tungsten heavy alloy (WHA) materials A method of imparting high strength, high ductility, and high fracture toughness to a refractory metal alloy workpiece includes: (i) subjecting the workpiece to at least one pass that reduces the initial cross-sectional area of said workpiece, (ii) anneal... | 12/05/2000 |
| 6149705 | Non-lead, environmentally safe projectiles and method of making same A projectile, such as a bullet, is made by combining two different metals in proportions calculated to achieve a desired density, without using lead. A base constituent, made of a material having density greater than lead, is combined with a binder consti... | 11/21/2000 |
| 6090227 | Structural units for glass melts made from a molybdenum/tungsten alloy Structural units which come into contact with glass melts and ceramic melts are exposed to strong corrosive attack. Molybdenum is a known material for glass melt electrodes but it is not usable for the majority of highly corrosive glass and ceramic melts.... | 07/18/2000 |
