Why is the hardness of tungsten powder the hardest of metals?
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Author : Lzh
Update time : 2023-02-04 14:37:33
What is tungsten powder? Tungsten powderis a gray-black metal with metallic luster (body-centered cubic crystal). Its melting point is 3400 ℃, and its boiling point is 5555 ℃. The hardness of tungsten is the hardest of the metals. The hardness of sintered tungsten rod is 200~250, and the hardness of the tungsten rod is 350~400. It is soluble in the mixed acid of nitric acid and hydrofluoric acid. It is fused with a mixture of sodium hydroxide and sodium carbonate. It is slightly soluble in nitric acid, sulfuric acid, and aqua regia; It is insoluble in water, hydrofluoric acid, and potassium hydroxide. There are two types of tungsten, a, and B. At standard temperature and atmospheric pressure, type a is a stable body-centered cubic structure. Type B tungsten can only appear in the presence of oxygen. It is stable below 630 ℃, converted to tungsten at above 630 ℃, and this process is irreversible. In addition to certain requirements for impurity content, tungsten powder oxygen content should be controlled within a certain range. The grain size of commonly used tungsten powder is generally 2~10 of the average grain size μ M. Tungsten powder is polygonal particle shape. In addition, the specific surface, loose density, and shake density of tungsten powder also vary within a certain range. The performance of tungsten powder directly impacts the production of tungsten materials, and the quality of tungsten powder metallurgical products, especially the impact of purity and particle size, is more obvious. Tungsten powder is classified according to purity, particle size, and different uses.
Classification of tungsten powder The quality of tungsten powder directly determines the quality and alloy performance of tungsten carbide (WC). The Classification of tungsten powder can effectively change the performance of the powder, solve the problem of a coarse and fine powder, reduce the particle size, the difference between the maximum particle size and the average particle size, and produce a thicker and more uniform tungsten carbide powder; Because the characteristics of tungsten determine that it is not easy to break, it is more effective to separate the powder and improve the uniformity by properly breaking before grading and separating the agglomerated particles in the powder; The system operation parameters must be strictly and carefully adjusted for grading. According to the characteristics of the original powder, the best operation process needs to be found.
Safety of tungsten powder For the toxicity of tungsten powder, see tungsten trioxide. The product should be put into a clean polyethylene plastic bottle, the cap should be tightened, the plastic bottle should be placed in a wooden box, and the surrounding should be fastened with soft objects, or the product should be put into an iron bucket lined with polyethylene plastic bags, the net weight of each box (barrel) is 30kg. The product should be stored in a dry, ventilated, acid-free, and alkali-free warehouse to prevent oxidation. The product should be protected from rain and moisture during transportation, The storage period of FW-1 and FW-2 should not exceed half a year, and the storage period of FWP-1 should not exceed half a year.
Price of tungsten powder Tungsten powder particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of tungsten powder. A large amount of large amount will be lower. The Price of tungsten powder can be found on our company's official website.
Tungsten powder supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including tungsten powder, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective tungsten powder, you are welcome tocontact us or inquire at any time.
