It would seem that may be easier to wire — one of the most popular productions of metal-roll? Especially because, as claimed by Oscar Wilde: in life — simple is correct. However, the production of tungsten wire is associated with a number of difficulties.
It is made of the most refractory metals of t ° Melting + 3422 ° C. Tungsten has a high strength, heat resistance, resistance in aggressive industrial environments. This wire retains hardness at extreme heat, wear resistant, the wire has a minimal coefficient of thermal expansion, that allow you to use it for the most critical parts. The wire has the highest tensile modulus and compression, high electrical resistance, excellent thermal conductivity. Wear resistance, high resistance to thermal creep made it indispensable in modern industry.
Wire group A, B, and C (black) marks VA BPH, HF produced by powder metallurgy technique. Harvesting are powder rods, which are heated and rolled rotary forging machine to a diameter of 1−10 mm. More thin wire called a filament. Its structure can add chromium, cobalt, and carbon. In this case, its strength is increased by 30%. 1 gram tungsten filament rolled in a length of 3.5 meters, sufficient to manufacture 700 60-watt bulbs. Thanks to this global electrical production needs satisfied 2 railway wagon tungsten per year.
For the production of cathodes and heaters electronic devices and electronic X-ray equipment used tungsten wire BM brand, resistant to shock and vibration at t ° to 2100 ° C. Mark BPH — for springs, hooks, cathodes electronic and gas discharge devices, inputs, traversoa and other parts that do not require tungsten with special additives… Due to the high electrical resistance and unique light output, a tungsten filament indispensable in lighting fixtures. Tungsten filament light sources is made according to GOST 671−91 of 19 brands VA, HF, BPH, diameter 19,5mkm — 1.5 mm. It is used for the production of spiral cathodes of electronic devices, electronic springs and semiconductor devices, loop nespiraleobraznyh cathodes, heaters and so on. N. Tungsten grid and filters used in the chemical industry. Tungsten wire is not only for the production of surgical instruments. In mechanical engineering, textile industry, samolёto- and rocket made from it the most critical parts. In a non-consumable tungsten electrode exceptional heat resistance and reliability. They allow you to bind sheets of steel, copper, aluminum, brass, thin and flat seam.
Tungsten wire GOST 18 903−73
|tungsten Brand||Group||surface Conditions||Ø, mm||appointment|
|VA||A||Black||10 — 1500||Spiral lamps. Spiral heaters and cathodes of electronic devices, semiconductor devices springs.|
|VA||HELL||Black increased manufacturability||50 — 1500||Heaters directly heated cathodes and the cathodes with a helical structure of the core factor of 1 — 2.2|
|VA||AE||Black increased heat resistance||500 — 1200||Spiral directly heated cathodes and the cathodes with heaters working t ° t ° or heat treatment above 2000 ° C.|
|VA||AP||Black||10 — 200||Loop heaters, the grid and the spring of electronic devices, nespiralevidnye cathodes.|
|VA||B||Purified||11 — 500||Support, hooks, springs, spiral filament lamps, spiral heaters and cathodes electronic and gas discharge devices.|
|VA||T||Purified and annealed||11 — 500||Loop heaters, the grid, cathodes nespiralevidnye. Spiral some bulbs Special lamps|
|VA||T||Etching||5 — 12||. Grid electronic devices Heaters cathodes and spiral and nonspiral directly heated cathodes.|
|VA||TO||Pickling and annealed||5 — 12||. Grid electronic devices Heaters cathodes and spiral and nonspiral directly heated cathodes.|
|BM||A||Black||11 — 1500||Spirals Special lamps bulbs and details of devices, working at t ° to 2100 ° C under high mechanical loads (shock, vibration)|
|BPH||A||Black||800 — 1500||Bushings, beams and other items that do not require doped tungsten.|
|BT-7||A||Black||20 — 1500||Springs, hooks, cathodes some of discharge tubes or lamps|
|BT-10||A||Black||25 — 1500||Cathodes electronic and gas discharge devices|
|BT-15||A||Black||150 — 1500||Cathodes electronic and gas discharge devices|
Buy at a bargain price
In stock company «Electrovek-steel» a wide range of high-quality tungsten hire at a price that will satisfy any customer. For wholesale orders granted preferential discounts.