Tungsten Manufacturer in china

Tungsten Manufacturing

Pure tungsten metal is with theoretical purity 99.95% and density 19.25g/cm3. Luoyang Modi Tungsten & Molybdenum Materials is specialized in manufacturing and exporting in the past two decades, and supplied nearly all kinds of pure wolfram products with different shapes, e.g. wolfram wire, wolfram heater, wolfram bar, wolfram electrode, wolfram plate, wolfram sheet, wolfram target, wolfram needle, wolfram boat, wolfram crucible, wolfram contact, wolfram point etc. We are very proud of supplying high-quality pure tungsten products with great services at the most competitive prices.

As a high performance material, wolfram products have high melting temperature (3,422 °C, 6,192 °F), high density (19.25g/cm3), low vapor pressure (at temperatures above 1,650 °C, 3,000 °F), low thermal expansion combined with good thermal conductivity, sufficient electrical resistance and high modulus of elasticity. Whether the metal is shaped in disc or boat, or crucible, it will not change its density and high temperature resistance properties and mostly, the machining is done after sintering and/or forging. Wire cutting is using Ø0.18 molybdenum wire for the round outer circle or center hole.

Pure wolfram products are widely used for furnace parts, semiconductor base plates, components for electron tubes, emission cathodes for electron beam evaporation, cathodes and anodes for ion implantation, tubes / boats for sintering of capacitors, targets for X-ray diagnostics, crucibles, heating elements, X-ray radiation shielding, sputtering targets and electrodes. Tungsten wire, plate, sheet, disc are popular types for the above application machining. Luoyang Modi Tungsten & Molybdenum Materials Co. can provide customized types for customized application.


 

The most popular applications of pure wolfram are for producing arch - welding electrodes, filaments for bulb lamps, heating elements in high temperature furnaces, etc. Tungsten electrode, namely wolfram rod, including thorium wolfram electrode, cerium wolfram electrode, lanthanum wolfram electrode, zirconium wolfram electrode and yttrium wolfram electrode and pure wolfram electrode has been widely used in welding and used as cathode or anode. TIG and GTAW welding are the welding method for tungsten electrodes, no matter the rare earth doped. According to the different tip color, the grade of electrode can be identified.

Tungsten filament is a product existed when the bulb with tungsten filament is invented and has a long history. Since tungsten filament has gone through so long history, it has been created with kinds of shapes to match different bulbs, such tungsten filament in the room, tungsten filament in the car, tungsten filament in the motorbike, and so on. All the applications has promoted tungsten filament to be more fashion and applicable. Wires are mostly with black and cleaned surface. Cleaned wire is removed graphite surface from black tungsten wire. With settled uses, wire can be doped for a longer life time purpose. The needle with small diameter can also cut from straightened tungsten wire.