Molybdenum metal is usually produced by powder metallurgy techniques in which Mo powder is hydrostratically compacted and sintered at about 2100°C. Hot working is done in the 870-1260°C range. Moly forms a volatile oxide when heated in air above about 600°C and therefore high temperature applications are limited to non-oxidizing or vacuum environments. Moly alloys have excellent strength and mechanical stability at high temperatures (up to 1900°C). Their high ductility and toughness provide a greater tolerance for imperfections and brittle fracture than ceramics. The unique properties of molybdenum alloys are utilised in many applications: High temperature heating elements, radiation shields, extrusions, forging dies, etc; Rotating X-ray anodes used in clinical diagnostics; lass melting furnace electrodes and components that are resistant to molten glass; Heat sinks with thermal expansivity matching silicon for semiconductor chip mounts; Sputtered layers, only Ångstroms (10-7 mm) thick, for gates and interconnects on integrated circuit chips; Sprayed coatings on automotive piston rings and machine components to reduce friction and improve wear. For specialised applications, Mo is alloyed with many other metals: Mo-tungsten alloys are noted for exceptional resistance to molten zinc; Mo is clad with copper to provide low expansion and high conductivity electronic circuit boards; Mo-25% rhenium alloys are used for rocket engine components and liquid metal heat exchangers which must be ductile at room temperature.

Tungsten heavy alloy illustrate the advantages of microencapsulated powders. A brief background of this alloy system follows. Tungsten alloys generally are refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloy is added Co?Mo?Cr, etc. They have very high melting point and have a density twice that of steel and are more than 50% heavier than lead. Tungsten content in conventional heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 16.5 and 18.75 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and which makes the alloys ductile and easy to machine. Nickel-iron is the most popular additive, in a ratio of 7Ni:3Fe or 8Ni:2Fe (weight ratio). The conventional processing route for tungsten heavy alloys includes mixing the desired amount of elemental powders, followed by cold pressing and liquid phase sintering to almost full density. The matrix alloy melts and takes some tungsten into solution during liquid phase processing, resulting in a microstructure through which large tungsten grains (20–60µm) are dispersed in the matrix alloy. The as-sintered material often is subjected to thermo mechanical processing by swaging and aging, which results in increased strength and hardness in the heavy alloys. The majority of current uses for WHAs (tungsten heavy alloys) are best satisfied with the W-Ni-Fe system. Alloys such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe represent common compositions. The addition of cobalt to a W-Ni-Fe alloy is a common approach for slight enhancement of both strength and ductility. The presence of cobalt within the alloy provides solid-solution strengthening of the binder and slightly enhanced tungsten-matrix interfacial strength. Cobalt additions of 5 to 15% of the nominal binder weight fraction arc most common.

Tungsten carbide, generally sintered (or cemented )carbides or carbonitrides, are a range of very hard, refractory, wear-resistant alloys made by powder metallurgical techniques. In most cases carbides particles are "cemented" by a binder metal which is liquid at the sintering temperature. Surprisingly, even to many engineers and metallurgists, individual hardmetals many differ in composition and properties as strikingly as brass and high-speed steel. Although no single element is present in all hardmetals, it is no accident that, to the slightly initiated user, they are collectively termed "tungsten carbide". The earliest successful grades were based on this constituent, discovered just a century ago, as are the majority of those made today. Nowday,we offers a wide variety of Tungsten Carbide (T.C.) Products for just about any application based on our advanced technology,Senior engineers and responsible workers,under the using of modern equipment-Instruding Machine, HIP Furnace and the Vacuum Sinter Furnace,products with the superduper stable quality, performance and perfect surface, our wide range of Tungsten Carbide Products from Tungsten Carbide Bars,Tungsten Carbide Buttons, Tungsten Carbide Inserts, Tungsten Carbide Drawing Dies, Tungsten Carbide Tips,Tungsten Carbide Blocks, Flats, Tungsten Carbide Irregular Wear-Resistant Parts, Tungsten Carbide Jewelry,Tungsten Carbide Tyre Nails (Pins) and more... You'll find what you need right here. And with experienced sales and warehouse facilities, chances are it's in stock and ready to ship out to you.We accept orders of all kinds of special designed products of tungsten carbides. Welcome your any inquiries to our company, we are waitting for serving you the best quality and service.

Because of the outstanding performance of Rhenium, when adding rhenium into tungsten or molybdenum respectively,W-Re alloy and Mo-Re alloy are formed. Their electrical property, high-temperature ductility and processing ability are promoted and strengthened to a large extent which are available to the wide application on high temperature parts like heaters,thermocouples and cathode tubes etc.TD Materials Ltd. produce customized W-Re & Mo-Re alloys products with various specifications in the shapes of wire, rod, pole, plate and other irregular parts. Tungsten can be added 3%, 5%, 25% and 26% of rhenium to form tungsten rhenium alloy for high temperature thermocouple wire and the cathode wire. Adding 41%~47.5% of rhenium to molybdenum forms molybdenum rhenium alloy (nominal composition is 50% Mo +50% Re).It has good high-temperature ductility, used in the electronics industry, nuclear industry and aerospace industries.

Tantalum provides a combination of properties not found in most refractory metals. Its high melting point (2296° C, or 5425° F), tolerance for interstitial elements, and reasonable modulus of elasticity make it an attractive alloy base material. Tantalum also possesses excellent room-temperature ductility (>20% tensile elongation) and is readily weldable. Commercially pure tantalum, tantalum-tungsten alloys, and tantalum-niobium alloys are widely used in capacitors and chemical-process equipment such as heat exchangers, condensers, thermowells, and lined vessels; most notably, it is used for the condensing, reboiling, preheating, and cooling of nitric acid, hydrochloric acid, sulfuric acid, and combinations of these acids with many other chemicals. Because of its high melting point, tantalum is used for heating elements, heat shields, and other components in high-temperature vacuum furnaces. Tantalum and its alloys have been used in specialized aerospace and nuclear applications and have found increasing use in military components (e.g., antiarmor weapon systems). Because of its corrosion resistance of body fluids, it is used in prosthetic devices, implants and surgical staples.