Class / Patent application number | Description | Number of patent applications / Date published |
420430000 | TUNGSTEN BASE | 10 |
20110243787 | POWER OF TUNGSTEN ALLOY WITH TRANSITION METAL DISSOLVED THEREIN AS SOLID SOLUTION AND PROCESS FOR PRODUCING THE SAME - This invention is related to a powder of a tungsten alloy with a transition metal dissolved therein as a solid solution that is suitable as material for a cemented carbide represented by formula [1] and a material for a catalyst. The powder of tungsten alloy is characterized in that at least one transition metal element selected from the group consisting of cobalt, iron, manganese and nickel is dissolved as a solid solution in a tungsten grating and a peak derived from a bcc tungsten phase appears in an X-ray diffraction diagram. Formula [1]: M−W wherein M represents one or more elements selected from Co, Fe, Mn and Ni. The use of tungsten alloy powder can provide a tungsten carbide with a transition metal dissolved therein as a solid solution in which a solid solution phase comprising at least one transition metal element selected from the group consisting of cobalt, iron, manganese and nickel, tungsten and carbon is included in a tungsten carbide skeleton, and a tungsten carbide diffused cemented carbide. | 10-06-2011 |
20120251380 | RECYCLING OF TUNGSTEN CARBIDES - The invention relates to a process for producing an iron-and/or tungsten containing powder or powder agglomerate including the steps of: a) mixing at least a first powder fraction comprising a tungsten carbide containing powder, and at least a second powder fraction comprising an iron oxide powder and/or a tungsten oxide containing powder and optionally an iron powder, the weight of the first fraction being in the range of 50-90% by weight of the mix and the weight of the second fraction being in the range of 10-50% by weight of the mix, b) heating the mix of step a) to a temperature in the range of 400-1300° C., preferably 1000-1200° C. The invention also relates to an iron-and/or tungsten containing powder or powder agglomerate. | 10-04-2012 |
20140294663 | METHOD FOR MANUFACTURING FINE TUNGSTEN POWDER - A method for finely powdering tungsten powder, which includes electrolytically oxidizing tungsten powder while stirring in an aqueous mineral-acid solution to form an oxide film in the surface of the tungsten powder and removing the oxide film with an alkaline aqueous solution; a method for producing tungsten powder to obtain fine tungsten powder by a process including the above method for finely powdering; and a tungsten powder having an average particle size of 0.04 to 0.4 μm, in which the dMS value (product of an average particle size d (μm), true density M (g/cm | 10-02-2014 |
20140301891 | TUNGSTEN ALLOY, TUNGSTEN ALLOY PART, DISCHARGE LAMP, TRANSMITTING TUBE, AND MAGNETRON - According to one embodiment, a tungsten alloy includes a W component and a Hf component including HfC. A content of the Hf component in terms of HfC is 0.1 wt % or more and 3 wt % or less. | 10-09-2014 |
20150023837 | Tungsten Sintered Compact Sputtering Target and Tungsten Film Formed Using Same Target - Provided is a tungsten sintered compact sputtering target, wherein the purity of the tungsten is 5N (99.999%) or more, and the content of impurity carbon in the tungsten is 5 wtppm or less. An object of the present invention is to decrease the specific resistance of a tungsten film sputter-deposited by using a tungsten sintered compact sputtering target by reducing a carbon content in the tungsten target. | 01-22-2015 |
20150303040 | Tungsten Sintered Compact Sputtering Target and Tungsten Film Formed Using Said Target - A tungsten sintered compact sputtering target, wherein a molybdenum strength detected with a secondary ion mass spectrometer (D-SIMS) is equal to or less than 1/10000 of the tungsten strength. This invention aims to reduce the specific resistance of a tungsten film sputtered using the tungsten sintered compact target by reducing the molybdenum in the tungsten sintered compact sputtering target and adjusting the grain size distribution of the W powder that is used during sintering. | 10-22-2015 |
420431000 | Carbon, boron or nitrogen containing | 4 |
20100260641 | METHOD OF MAKING A CEMENTED CARBIDE POWDER WITH LOW SINTERING SHRINKAGE AND THE POWDER OBTAINED - A method of making cemented carbide powder with low sintering shrinkage including WC and 4-15 wt-% Co and up to 20 wt-% cubic carbide forming elements from the Groups 4 and 5 of the Periodic Table of the Elements by the powder metallurgical techniques wet milling, pressing and sintering. According to the method wet milling is performed in a rotating ball mill with a ratio between the weight of milling bodies and powder of 2-5. The milling bodies are shaped either as spheres or cylinders with semi-spherical end surfaces. The spherical bodies have a diameter of 10 to 15 mm and the cylindrical bodies have a diameter and height of 10 to 15 mm. The composition of the milling bodies is WC with 6 to 10 wt-% Co. A powder made according to the method is described. | 10-14-2010 |
20120020828 | METHOD OF PREVENTING OXIDATION OF METALS IN THERMAL SPRAYING - The invention relates to a method for preventing the oxidation of metals in thermal spraying by coating the metallic powders to be used with nanocarbides, to a coating achieved using the method as well as to a method for treating the metal powder with nanocarbides. The methods according to the invention are suitable for all metal powders used in thermal spraying and, as the invention enables the use of cheaper materials, they are economically extremely advantageous. | 01-26-2012 |
20140017114 | TUNGSTEN CATHODE MATERIAL - Provided is a cathode material which becomes an alternative material of a cathode material formed of a W—ThO | 01-16-2014 |
20150125340 | TUNGSTEN ALLOY PART, AND DISCHARGE LAMP, TRANSMITTING TUBE, AND MAGNETRON USING THE SAME - According to one embodiment, a tungsten alloy includes 0.1 to 5 wt % of Zr in terms of ZrC. | 05-07-2015 |