tungsten bar tungsten has slightly radioactive

characteristics of pure tungsten

Source Chinese "W" and the symbol "W" tungsten cubic‍ are from the German Wolfram. Three recently discovered the most stable isotopes of tungsten has slightly radioactive. [3]

Pure tungsten is a steel-gray to tin-white hard metal, very pure tungsten can be see-saw sawing (pure tungsten is very brittle and difficult to process). Tungsten processing methods have wrought

Manufacturing, tensile and impact. In the highest melting point of all metals tungsten is 3422 ° C, the lowest vapor pressure at the highest tensile strength (1650 ° C time). Its antiseptic

Performance is very good, most of the erosion of its small inorganic acids. Forming a protective oxide layer on its surface in the air, but at high temperatures it will be finished

Full oxidation. Steel was added to a small amount tungsten carbide inserts‍ of tungsten can greatly increase the hardness of steel.

Tungsten, tungsten ore is a chemical element, its chemical symbol is W, its atomic number is 74, is an off-white transition metal. It is a very hard, Steel-gray to white transition metal. Minerals containing tungsten are wolframite and scheelite and so on. Tungsten is very strong physical characteristics, in particular its melting point is very high,

All non-alloy metals in the highest. Pure tungsten is mainly used in electrical and electronic equipment, many of its compounds and alloys are also used in many other applications (the most commonly

See light bulb filament, and the X-ray molybdenum rod‍ tube at a high temperature tungsten alloy is also used).

tungsten bar White molybdenum net exposure

How to prevent white molybdenum oxide network and how to package white molybdenum network

White molybdenum net exposure at room temperature, air tungsten cubic‍ humidity environment will slow oxidation. Molybdenum heating network in the air, the color from white to dark gray start; temperature rise 20 ℃, molybdenum internal network began to be slow oxidation, oxidation speed mechanical strength decreased slightly broken receive external force will lead to scrap, so molybdenum mesh bag Installation and use of the environment is particularly important. White molybdenum mesh packaging vacuum packaging film moisture in the air before the user isolation, to prevent oxidation. White molybdenum tungsten carbide inserts‍ extremely high due to the net

Temperature air oxidation, usually only used in high temperature environment or under vacuum at room temperature state components used in the electronics industry to make the.‍

tungsten bar White molybdenum net exposure

How to prevent white molybdenum oxide network and how to package white molybdenum network

White molybdenum net exposure at room temperature, air tungsten cubic‍ humidity environment will slow oxidation. Molybdenum heating network in the air, the color from white to dark gray start; temperature rise 20 ℃, molybdenum internal network began to be slow oxidation, oxidation speed mechanical strength decreased slightly broken receive external force will lead to scrap, so molybdenum mesh bag Installation and use of the environment is particularly important. White molybdenum mesh packaging vacuum packaging film moisture in the air before the user isolation, to prevent oxidation. White molybdenum tungsten carbide inserts‍ extremely high due to the net

Temperature air oxidation, usually only used in high temperature environment or under vacuum at room temperature state components used in the electronics industry to make the.‍

tungsten bar molybdenum mesh welding brittleness

Molybdenum and molybdenum mesh network performance classification

Molybdenum network has a high temperature tungsten bar‍ resistance, applied in a vacuum furnace heat treatment industry, the maximum temperature can reach 2200 ℃. Net producer of molybdenum lanthanum alloy wire is often used for the production of molybdenum

Raw materials, lanthanum alloy strength can be maintained. Molybdenum metal wire woven mesh has good thermal conductivity and a low coefficient of expansion, at a high temperature (1100 ~ 1650℃) high strength, as compared to tungsten mesh easier processing. tungsten carbide inserts‍ The tube can be used as the gate and anode, the support materials, light, and for the production and casting Extrusion dies, spacecraft parts.

????Due to low temperature brittleness and molybdenum mesh welding brittleness and high temperature oxidation, so that the surface coated graphite milk to protect the molybdenum substrate, slow oxidation rate increase

Frequency of use. Mass production of molybdenum tungsten cubic‍ molybdenum mesh network series series, molybdenum foil punching network series. The surface molybdenum mesh weave which can be divided into light and dark molybdenum Network

Color molybdenum net. The new molybdenum mesh products through mechanical leveler can improve their strength and flatness.

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tungsten bar Tungsten production process

Large number of experimental studies suggest that the anti-sagging performance and a very small amount of silicon, aluminum, potassium oxide by hydrogen reduction of tungsten tungsten ingot metal powder, tungsten oxide formed prior to incorporation of "doping effect" closely related. For the needs of industrial production, it is the role of doping-sag performance and extensive research, industrial production in general, silicon, aluminum, potassium dopant by a tungsten electrode to the tungsten oxide by hydrogen reduction to tungsten powder, mixing, pressing, burn, melt processes produce a vertical tungsten. Tungsten after swaging or rolling, blooming, annealing, drawing and other processes produce a variety of tungsten wire. In the course of a sintered tungsten, the dopant and other impurities volatilized as the tungsten rods  temperature rises. Volatile silicon and aluminum is very strong at 2 000 ~ 2 200 ℃ when more than 2 200 ℃, the aluminum basically evaporate.

tungsten bar Try to use advanced mold processing technology to produce high-quality carbide drawing dies

At present, most of the tube with a tungsten tungsten coil pick from. tungsten filaments In feeding the process, a lot of cracking scrap tungsten plate, yielding low, rolled into a tube shape is not round, the difference between the radial strength of the tube. Moreover, pipe wall thickness tolerance volume tungsten plate although strictly controlled, but the influence of the cigarette seam, the uniformity of the thickness of the tube is undesirable. To this end, we use a powder metallurgy method of trial Spinning seamless tungsten tube. Abstract trial program blanks consumption. Material selection 601 plant purity tungsten powder, its tungsten tube. Set the powder uniformly charged with intermediate tungsten carbide rod plastic sleeve, sealed with a stopper and rounded ends, and press-molded at a maximum pressure of 2 tons / cm, the concentration of the HIP container, and finally on the hydrogen sensor 200KW sintering furnace sintering, the sintering process. Gives the tungsten filament  physical properties of tungsten powder particle size greater difference between the two groups composed of cumulative curves and median diameter, and these two groups of tungsten powder at a temperature of 2350 ~ 2400 ℃ sintered at different times by the density and grain size.

tungsten bar most of the tube with a tungsten coil connection is made using tungsten

At present, China's nonferrous metals trade, the largest trade smelting products , its quality directly affects the quality of subsequent processing of the product. As of 2005 , remelting ingots , copper cathode , lead, zinc , zinc , tin ingots, magnesium, gold bullion , silver bullion , such as product standards average water reached the international advanced level , quality and international level is very kind . Among them, 48 brands of eight kinds of products on the London Metal Exchange is the world's largest non-ferrous metals market , to enter the international market marks the recognition of product quality . China's major copper, aluminum , lead, zinc , tin and other production companies are registered . Because from the production technology, equipment level to greatly improve enterprise management , the quality of non-ferrous metal processing material has significantly improved. National standard processing materials , the industry standard system integrity, the standard level of developed countries are equivalent, but the overall level of physical quality is uneven , with some typical wood processing products quality has reached the international advanced level. For example ,tungsten bar and refrigeration with brass, before basically rely on imports in recent years, not only meet the domestic demand for the rapid development of air conditioning and refrigeration industry , strongly supports the development of household appliances, power generation and other industries , but also exported to Japan and Europe and other countries for China to become the world's largest air conditioner , refrigerator production , tungsten cubic  make a contribution. Aluminum profiles for the construction industry in recent years has been the rapid development of its products quality has reached the international level , not only meet the domestic demand for the rapid development of the construction industry , but also a large number of export . At present, China has become the world's first architectural aluminum production, exports , consumer. Thanks to the development of aluminum profiles market competition mechanism , after nearly a decade of market competition and elimination, product variety and quality has thus reached a new level. In rare metals and powder metallurgy products, our tantalum powder and tantalum wire processing other materials tantalum and niobium , lithium products such as industrial lithium carbonate, tungsten filaments hydroxide monohydrate and tantalum chloride anhydrous crystalline tantalum, lithium metal , with its products quality able to meet and exceed the technical requirements of the standard , endorsed, export volume rising domestic and foreign users .