Tungsten sheet is a superior structural material. It has exceptional high temperature strength and heat resistance, a low coefficient of thermal expansion, high resistance to temperature creep, good thermal conductivity, high coefficient of electron emission. It has high modulus of compression-tensile, resistance to corrosion, acids, alkalis, concentrated solutions of sulfuric, nitric and hydrochloric acids, Aqua Regia. Chemical resistance, durability, biological safety make tungsten sheet is indispensable for modern industry.
|The temperature at which the obtained data the features of t°C||20°C|
|The linear thermal expansion coefficient α [1/Deg]||43x10-6|
|The density of the alloy [g/cm3]||19,3|
|Tensile strength tensile kg/mm2||35|
|Specific heat at 20 °C [kJ/(kg·deg)]||0,134|
|The thermal conductivity K [W/(m·K)]||300,173|
|Electrical resistivity R, Mhmm2/m||0,054|
The drawbacks include the difficulty of obtaining tungsten in its pure form, a large proportion (like gold) and brittle at low temperature. Tungsten because of its exceptional properties poorly to treatment (rolling, drawing, forging) only with considerable heat.
Tungsten sheet is produced from sotunki by special hot-cold rolling. Because the tungsten in the hot easily engages with atmospheric gases, are used the most modern technologies of the chemical. protection. First manufactured: using powder metallurgy to receive the rod billet. After it heats up and Raskulinecz on a rotary forging machine — you get a sheet with a very smooth surface. Surface oxides are removed by annealing at t° 1000 °C in hydrogen atmosphere or a hot solution of caustic soda. The quality of the sheet controlled at all stages of production. Than the thinner sheet, the less heat is required for its processing. The foil is rolled at normal temperatures. The sheet can ostanovyatsya, extruded products of any desired shape.
Connection of sheets made of tungsten is done using seam or spot welding, but the weld is practically always turns out fragile and recrystallized. The most reliable is a rivet connection. Tungsten sheet is soldered with Nickel, silver, copper, non-oxidizing protective atmosphere. For the manufacture of parts of electronic lamps and tungsten sheet welded with Nickel.
Sheet of tungsten is indispensable for the details of x-ray equipment, targets, electronic devices, vacuum tubes, manufacturing of boats, heat-resistant fences, high-temperature containers. Tungsten strip is used in the production of inputs electric current to the heating components of electric furnaces and light bulbs. The rapid development of modern robotics and instrumentation, nuclear energy, engineering, petrochemical industry, medicine stimulate demand for the sheet of refractory metals. Tungsten sheet is most commonly used by the military-industrial complex, nuclear energy; industrial chemical synthesis; in the manufacture of heat exchangers; electronic devices, radio. It is used for heat-resistant parts, refractory shields.
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A large range of high quality tungsten sheet of various parameters on the stock LLC «AVEK global» can satisfy any consumer. The quality of the finished product is ensured absolute compliance with all technological norms of production. The timing of orders is minimal. If necessary, you will receive detailed advice from experienced managers. For wholesale orders the company provides flexible discounts.