Tungsten metal

Tungsten metal bar is a bar material with tungsten as the main component, featuring high melting point, high hardness, good electrical conductivity and corrosion resistance, etc. It plays an important role in high temperature applications, electronic industry, machining and many other fields.

Characteristics

High density: The density of tungsten metal rods can reach 19.35 g/cm3, which is one of the higher densities among metal materials. The high density makes tungsten rods less prone to deformation and distortion during the manufacturing process, which ensures their structural stability and reliability.

High melting point: With a melting point as high as 3410°C, tungsten rods maintain good stability under high temperature environments and are not easy to melt or decompose. This characteristic makes tungsten rods widely used in high-temperature heating equipment, high-temperature pipelines and other fields.

High hardness: tungsten metal rods have high hardness and can withstand greater pressure and wear, making them suitable for the manufacture of parts requiring high hardness, such as cutting tools, moulds and so on.

Low coefficient of thermal expansion: A low coefficient of thermal expansion means that tungsten rods have less dimensional change when the temperature changes, which is important for some application scenarios that require high dimensional accuracy, such as in the manufacture of electronic components.

Good electrical and thermal conductivity: Although tungsten metal is a metal with a high melting point, it still has good electrical and thermal conductivity, which enables it to transfer electric current and heat quickly.

Strong corrosion resistance: tungsten metal rods are not easy to be oxidised in high temperature environments, and they have good corrosion resistance to most chemicals, and can be used in corrosive environments such as acids and alkalis.

Good chemical stability: tungsten metal is chemically more stable, not easy to have chemical reaction with other elements, which makes tungsten rods maintain stable performance in various complex chemical environments.

Applications

Electrode material:

Tungsten tig welding electrode: In tungsten tig welding, tungsten rod as an electrode plays the role of conducting current and igniting the arc. Tungsten’s high melting point, high hardness and good electrical conductivity enable it to remain stable under high-temperature and high-current welding conditions, and it is not easy to melt and wear out, which ensures the stability and high quality of the welding process. This welding method is widely used in aerospace, machinery manufacturing, automotive manufacturing and other welding quality requirements of the industry, such as for welding aircraft fuselage structure, engine parts, and automotive body frame.

E-beam welding electrodes: E-beam welding is a high-energy density welding technique that requires the use of high melting point electrode materials to generate and focus the electron beam. Due to its excellent physical properties, tungsten metal rods are very suitable for use as electrodes for electron beam welding, able to withstand the high temperature and high energy impact of the electron beam to ensure that the welding process is carried out smoothly. Electron beam welding is commonly used in the manufacture of high-precision mechanical parts, medical equipment, nuclear industry equipment, etc..

Filament material: In some special lighting fixtures and electronic equipment, tungsten rods are used as filament material. The high melting point of tungsten makes the filament not easy to melt under high temperature, which can ensure the service life and stability of the lamps and lanterns. For example, in some high-power incandescent lamps and tungsten halogen lamps, tungsten filament is the core component, which can emit bright light at high temperature. In addition, tungsten filaments are also used as filaments for electron sources in electronic equipment such as electron microscopes and electron beam exposure machines to provide electron beams for the equipment.

High temperature structural parts:

Aerospace: In components that work in high-temperature environments such as aircraft engines and rocket engines, parts made of tungsten rods are able to withstand high temperatures, high pressures and high-speed airflow. For example, the combustion chamber of the engine, turbine blades and other key components, the use of tungsten alloy materials can improve the high temperature resistance and mechanical strength of the components to ensure the normal operation and reliability of the engine. In addition, in the thermal protection system of spacecraft, tungsten materials are also used to manufacture high-temperature-resistant heat-insulating parts to protect spacecraft from high-temperature damage when returning to the atmosphere.

Metallurgical industry: In the high-temperature furnaces and kilns of the metallurgical industry, tungsten rods can be used to manufacture heating elements, thermocouple protection tubes and other components. The high temperature resistance and good chemical stability of tungsten enable it to work stably for a long time in high temperature and corrosive environment to ensure the temperature control of the furnace kiln and the smooth progress of the production process. For example, in the electric arc furnace and induction furnace of steel smelting, the heating element made of tungsten rods can provide a high temperature heat source to melt and refine the steel materials.

Cutting tools: Tungsten’s high hardness and good wear resistance make it an ideal material for manufacturing cutting tools. Tungsten  metal rods can be processed into tungsten steel cutting tools, such as drills, milling cutters, turning tools, etc., which are used to process various metal materials. Tungsten steel cutting tools have high cutting speed and cutting accuracy, which can effectively improve the machining efficiency and machining quality. Especially when processing hard-to-machine materials such as cemented carbide and high-speed steel, the advantages of tungsten carbide tools are more obvious.

Counterweight material: Due to the high density of tungsten, tungsten  metal rod can be used as counterweight material for some occasions that need to increase the weight, such as the balance counterweight of aircraft, ballast counterweight of ships, chassis counterweight of automobiles and so on. The counterweight made of tungsten metal rods is small in size and large in weight, which can effectively increase the weight of the object without increasing too much space, and improve the stability and balance of the object.

Military field: In the military industry, tungsten  metal rods have important application value. For example, tungsten alloy material can be used to manufacture the core of armour-piercing ammunition. Using the high density and hardness of tungsten, it is able to penetrate the enemy’s armoured target during high-speed impact and improve the lethality of the weapon. In addition, tungsten metal rods can also be used to manufacture key components of military equipment, such as the guidance components of missiles and the reflectors of radars, to support the performance enhancement of military equipment.