Bulk Tungsten Powder Tungsten Carbide Powder Ultra Fine Welding Powder

Tungsten powder is a gray-black metal with metallic luster (body-centered cubic crystal). Melting point is 3400℃. Boiling point is 5555℃. Tungsten is the hardest metal. The hardness of sintered tungsten rod is 200~250, and the hardness of tungsten rod struck by electric hammer is 350~400. It is soluble in a mixed acid of nitric acid and hydrofluoric acid. It is melted 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. Tungsten has two variants, a and b. At standard temperature and atmospheric pressure, a type is a stable body-centered cubic structure. B type tungsten can only appear in the presence of oxygen. It is stable below 630℃, and it transforms into a-tungsten above 630℃, and this process is irreversible.

Tungsten is mainly used to produce hard alloy and tungsten iron. Tungsten, chromium, molybdenum and cobalt form heat-resistant and wear-resistant alloys, which are used to manufacture tools, metal surface hardening materials, gas turbine blades and combustion tubes. Tungsten and tantalum, niobium, molybdenum and other refractory alloys. Tungsten copper and tungsten silver alloys are used as electrical contact materials. High-density tungsten nickel-copper alloys are used as radiation shielding parts. Metal tungsten wires, rods, sheets, etc. are used to manufacture parts of light bulbs and electron tubes and electrodes for arc welding. Tungsten powder can be sintered into filters with various porosities. It is used as a raw material for large slabs and tungsten-rhenium couples. It is used for contact alloys and high-density shielding materials. It is used for plasma spraying materials. Tungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys. Pure tungsten powder can be made into wires, rods, tubes, plates and other processing materials and products of certain shapes. Tungsten powder mixed with other metal powders can be made into various tungsten alloys, such as tungsten-molybdenum alloys, tungsten-rhenium alloys, tungsten-copper alloys and high-density tungsten alloys. Another important application of tungsten powder is to make tungsten carbide powder, and then prepare cemented carbide tools such as turning tools, milling cutters, drills and molds.