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Tungsten powder The raw material used for the preparation of tungsten alloys as well as tungsten products is powdered tungsten.

Tungsten Powder Properties

The hardest metal is tungsten. The hardness ranges from 200-250 for sintered rods, and 350-400 for rods passed through the rotary hammer. Tungsten is dissolved in an acid mixture of nitric and hydrofluoric acids and then melted using a sodium hydroxide-sodium carbonate mixture.
Tungsten is a grayish-black metal that has a metallic sheen (body-centered cube crystal). Tungsten powder has a slight solubility in nitric and sulfuric acids, as well as aqua regia. However, it is not soluble in water or hydrofluoric and potassium hydroxide.

Tungsten Powder Preparation

Tungsten is produced by hydrogen reduction. The preparation of tungsten powder using the hydrogen reduction method can be divided into two steps: in the first step, the tungsten dioxide is converted to tungsten oxide at a temperature between 500 and 700; the second is done at 700-900. Tungsten is converted to tungsten. The reduction reaction takes place in an electric furnace, a rotary oven or even a tube furnace.

The properties of reduced powder (such purity, particle sizes, particle size composition etc.) depend mainly on the reduction process. The main factor is the reduction process. In a tube oven, when reducing the tungsten, the main parameters that determine the reduction rate include the reduction temperature. Other factors are the loading of the burning boat with tungsten oxide, its speed, the flow rate and moisture content of the hydrogen. The tungsten particles become coarser as the temperature of reduction increases.

This method is used in addition to the hydrogen-reduction method. The tungsten obtained from this method has a low purity. Research on the reduction tungsten with metals such as aluminum, calcium and zinc is also in progress. Research is also underway. This method can produce ultra-fine tungsten particles with a particle size less than 0.05mm.

Tunsten Powder Applications

Tungsten is used mainly in the productions of ferro tungsten and cemented carbide. Tungsten, chromium molybdenum and cobalt are combined to form an alloy which is heat-resistant, wear-resistant, and used for gas turbine blades, combustion tubes and tooling. Tungsten, tantalum, molybdenum and niobium powders, for example, form a heat-resistant alloy. This alloy is refractory.
High-density tungsten-nickel-copper alloy is used as a radiation shield. Metal tungsten wires, rods, sheets, etc. These are used for the production of electronic tubes, light bulbs and electrodes for welding. Sintered filters can be created from tungsten.

Tungsten Powder is the main raw materials for powder metallurgy and alloy tungstens. Pure tungsten is processed into materials like wires or rods. It can also be made into tubes, plates and products of certain shapes. Tungsten powder can be mixed with other metals to create various alloys. These include tungsten and copper alloys, as well as tungsten and molybdenum. Another important use of tungsten is the preparation of cemented carbide products, such as turning and milling tools, drill bits, and molds.

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