Detail Application of Cleaned Tungsten Wire

Important applications of cleaned tungsten wire are for the production
of coiled incandescent lamp filaments, cathode and support structures for power tubes, heating elements for high temperature furnaces and
evaporation sources in metalizing processes. Thicker wire sizes,
straightened, finish-ground and cut into rod pieces are widely used for
glass-to-metal seal lead parts in the lighting and electronic industries. The
materials can be made filaments for auto lamps, fluorescent lamps, high
pressure halogen lamps and other lamp components.

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Cleaned Tungsten Wire Type and Application

Cleaned Tungsten Wire Type T
Double – screwy filament. Filament for high color temperature lamp and shockproof lamp etc.

Cleaned Tungsten Wire Type L
Filament for incandescent lamp. Cathode for emitting tube. High temperature electrodes. Twisted tungsten wire etc.

Cleaned Tungsten Wire Type W
Folded – heater for electronic tube, etc.

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Black Tungsten Wire Cleaned in Hydrogen Atmosphere

Black tungsten wire cleaned in hydrogen atmosphere, in order to get cleaned tungsten wire. 

This method of cleaning surfaces on a metallic article, comprising the steps of: (a) disposing the article within a vacuum furnace; (b) heating the article to a temperature of about 1400° F. or above within the vacuum furnace; and (c) repetitively cycling hydrogen gas and a vacuum within the furnace by supplying in each cycle a fresh supply of hydrogen gas within the furnace at a pressure within a range of about 500-10,000 microns, followed by removal of reaction products resulting from a reaction between hydrogen gas and surface contaminants on the article and substantially all residual hydrogen gas from within the furnace. 

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How to Weld Pure Tungsten Material with Other Metals

It has been a very difficult and puzzling question: how to weld pure tungsten material with other metals?

As for the melting point is really different. Let is take pure tungsten and copper as example to show how to weld tungsten with copper together.

The melting point of tungsten is as high as 3410℃, but copper 1083 ℃, if we need to weld them together. Then we could choose tungsten electrode as welding consumables, and using TIG welding. Choosing tungsten electrodes can be made from pure tungsten electrode, thorium tungsten electrode, cerium tungsten electrode, lanthanum tungsten electrode and composite tungsten electrode.

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