Tungsten-copper composite material is a structure composed of tungsten and copper, which are uniformly mixed with two-phase monomers that neither dissolve nor form intermetallic compounds. It is generally called tungsten-copper pseudoalloy 1. It is precisely because of these characteristics that tungsten-copper composite materials have the properties of high temperature resistance, high strength, high density of tungsten, and copper's high electrical and thermal conductivity, good plasticity and other comprehensive properties. Moreover, this comprehensive performance can also be adjusted by changing the proportion of its constituents. Therefore, tungsten copper alloy is widely used.
Tungsten copper alloy --- electric contact material
Electrical contact materials, also known as contacts or contacts, are the key components of high and low voltage electrical appliances. They are responsible for switching on and off the current, which directly affects the reliability and service life of switches and electrical appliances. During the arcing process of tungsten copper alloy contacts, the low-melting-point copper on the surface layer is first melted. Due to capillary action, it is adsorbed in the capillary holes of the tungsten skeleton. It evaporates under the high temperature of the arc and takes away a lot of heat, so that the tungsten skeleton is cooled, thereby The contacts have good breaking performance. Due to the high melting point of the tungsten skeleton, the ablation in the arc is extremely small, and even if the local temperature is too high, welding will not occur, thereby ensuring the stability, reliability and long life of the switching performance.
And the higher the tungsten content, the better the anti-burnout performance, but the lower the electrical conductivity, the specific use must be selected. At present, in addition to conventional high-voltage electrical switches, the main developments of tungsten-copper materials for electrical contacts are: Vacuum tungsten copper material for medium voltage.
Tungsten copper alloy --- electrode
Tungsten copper alloys can be used as electrode materials such as resistance welding electrodes, electric discharge cnc machining electrodes, and plasma electrodes. As an EDM electrode, it has become one of the main applications of tungsten copper composite materials. In the process of EDM, the role of the electrode material is to transport machining pulses and to remove the workpiece with its own minimum loss. Tungsten copper material has the advantages of fast machining speed, high machining quality, and small electrode material loss. Therefore, it has obvious advantages for high-speed tooling and finishing of difficult-to-machine materials.
Tungsten copper alloy --- high temperature resistant material
When the tungsten copper material is used at high temperature ℃ or higher, the copper contained in its two-phase structure will vaporize and absorb a large amount of heat, thereby significantly reducing the temperature of the surface of the tungsten copper device and ensuring the application of tungsten copper material at high temperature . Therefore, an important use of tungsten copper material is as a high temperature device for ablation and scouring of high temperature and high speed airflow such as rockets and missiles, such as gas rudders, nozzles, throat liners, nose cones, etc. In addition, it can also be used as the material cover of tank armor-piercing projectiles, the tail nozzle of extended range guns, and the orbital materials of electromagnetic guns.
Tungsten copper alloy--electronic packaging and heat sink materials
In recent years, with the development of microelectronic information technology, the requirements for electronic packaging materials have become higher and higher. Because the thermal expansion coefficient of tungsten copper alloy is very close to the thermal expansion coefficient of silicon wafers, and other materials, the thermal conductivity coefficient is high, and the above two coefficients can be adjusted by adjusting the tungsten copper content, so tungsten copper alloy has become an ideal package for electronic components in special fields. Materials, as substrates, connectors and heat dissipation components are widely used in computer central machining process, large-scale integrated circuits and high-power microwave devices.
Tungsten copper alloy --- Other materials
According to various characteristics such as tungsten-copper composite materials, various new possible applications are continuously researched and developed.For example, it can be used as a stiffener for heavy-duty sliding friction sleeves as a solid seal for high-speed rotation and movement. Components that require special requirements such as non-magnetic, low expansion, high elastic modulus, radiation shielding, etc. are being developed. Experimental polymerization reactors are being studied for device materials that can withstand and transfer large heat flows. In addition, the application of tungsten copper composite materials can also be found in lasers, communication equipment, office equipment, and sports and sports devices such as golf ball weights.