The Properties And Applications of Tungsten Powder

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

Tungsten Powder Properties

The hardest metal in the world 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 hydrofluoric, nitric and sulfuric acids. It is then melted using a sodium hydroxide-sodium carbonate mixture.
Tungsten is grayish-black with a metallic sheen (center-centered cubic crystal). Tungsten powder has a slight solubility in nitric, sulfuric, and aqua regia acids; however, it is not soluble in water.

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 900700. Tungsten is converted to tungsten. The reduction reaction takes place in an electric tube or rotary furnace.

The properties of reduced powder (such purity, particle sizes, particle sizes composition, etc.). The main factors that affect the reduction process are: In a tube oven, when reducing the tungsten, the main process variables that affect the rate of reduction are the reduction temperatures, the loading of the tungsten oxide into the burning boat and its speed, as well as the flow rate of the hydrogen. As the temperature of reduction increases, the tungsten particles become coarser.

This method is used in addition to the tungsten-oxide carbon reduction method. The tungsten obtained from this method has a low purity. A research project on the reduction tungsten with metals such as aluminum, zinc, calcium, etc., is also underway. 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. Tungsten can be sintered to create filters with different porosities.

Tungsten Powder is the main raw materials for powder metallurgy and alloys. Pure tungsten is processed into materials like wires or rods. It can also be made into tubes, plates and products of certain shapes. Mixing Tungsten Powder with Other Metal Powders Can Be Made Into Various Alloys. These include tungsten and copper alloys, tungsten and molybdenum alloys, tungsten and rhenium, high-density alloys. 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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