| Customization: | Available |
|---|---|
| Application: | Aviation, Electronics, Industrial, Medical, Chemical, Oil and Petroleum |
| Standard: | ASTM |
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Tungsten rods thermal conductors smelting stirring bars smelting heavy hammers fasteners and welding electrodes.
XI'AN KEFENG POWDER METALLURGY CO., is a leading tungsten supplier and manufacturer in China. Pure tungsten is a hard metal from
steel gray to tin white, tungsten with high purity can be sawed by swaging, pure tungsten is very fragile and difficult to be machined. Shapes can
e processed in foil, strip, sheet, plate, wire, rod, bar, tubing, blanks, crucibles as well as semi-finished & finished parts, customs sizes.
There are dozens of welding methods for different metals and purposes, each with different specifications for equipment, pressure and heat.
Tungsten Inert Gas, (TIG) welding, which is also known as Gas Tungsten Arc Welding (GTAW), first became popular in the 1940s because of its ability to join magnesium and aluminum. It was largely responsible for aluminum's rise in structural applications where high-quality welding was essential.
These are different types of welding that use a carbonate-silica flux to shield the welding area from oxygen and other atmospheric gases. Flux drops into the welding area, forming a byproduct "slag" that hardens and usually requires grinding, hammering, or chipping away after cooling.
In TIG welding, the electrodes and weld pool are instead protected from oxygen contamination by a shield of inert gas, such as argon or helium (when helium is used, the process is known as Heliarc welding.) The result is slag-free welds that have the same corrosion properties as the parent metal but don't require grinding, hammering, or chipping away hardened slag left after gas or manual metal arc welding.
Another significant advantage of tungsten electrodes is their ability to withstand incredibly high temperatures without melting away. A tungsten electrode with 2% thorium, for example, reaches a temperature near (but not over) the melting point of tungsten of 3410 °C. Only a negligible
amount of tungsten is consumed during each welding session.
Pure tungsten can be very difficult to fabricate for its high hardness and low ductility. It is a strong, hard, crack-sensitive metal that is usually brittle at room temperature. It requires special handling and skill beyond that
necessary from most metals and alloys. The best method for machining that involves metal removal is EDM.
In general the pure tungsten products can be finished as: grinding, forming, joining, milling, riveting, spinning, stamping, and turning.Stirring Bars For Rear-earth Smelting
Tungsten stirring bars used in the production of rare earth metals by molten salt electrolysis must be able to withstand extremely high temperatures and to resist chemical erosion. Tungsten rod application for this purpose is impressive due to its high melting point and very stable chemical properties in working temperatures below 1400 °C. Compared with graphite, for example, tungsten rod has a lower consumption rate and higher erosion resistance to the electrolyte.
Tungsten contact is a popular component cut from forged tungsten rods. It is a common tungsten rod application in high voltage and frequency switching operations such as circuit breakers, high voltage switches, and arcing contacts. Tungsten contact has a low surface evaporation rate, excellent arc resistance, and efficient electrical and thermal conductivity. The typical size of tungsten contacts is 2-6 mm in diameter with a maximum of 0.6 mm in thickness.
Kefeng's pure tungsten Wire has been used for filaments in the lamp industry. It offers exceptionally high strength at very high temperatures thanks to its best high temperature strength of the four common refractory metals. Its high temperature strength, combined with its good electrical resistivity, have made it a popular choice for many applications. Tungsten is used for heating elements in vacuum furnaces that exceed the temperatures of molybdenum and tantalum as well as other heater applications.
Technical parameters
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