Cu-W is the alloy of tungsten and copper, and the copper content of common alloys is 10%~50%. The alloy is prepared by powder metallurgy method with good conductivity, high temperature strength and certain plasticity. At a very high temperature, such as 3,000 ℃ above, the copper in the alloy is liquefied evaporation, a large amount of heat absorption, Copper Tungsten reduce the surface temperature of the material. So this kind of material is also called metal sweating material.
Copper-Tungsten has a wide range of uses, mainly for the manufacture of high voltage electrical switch contacts and rocket nozzle throat liner, tail rudder and other high-temperature components, Copper Tungsten also used as electrical processing electrodes, high-temperature molds and other requirements of conductive heat conduction performance and high-temperature use of the occasion. Density of copper and tungsten
Copper-tungsten alloys combine the advantages of metal tungsten and copper, tungsten melting point is high (tungsten melting point is 3,410 ℃, copper melting point 1080 ℃), density is large (tungsten density is 8. The density of copper is 34g/cm, 89/cm3), copper is superior in conductivity, copper-tungsten alloy (general range of components is WCU7~WCU50) Uniform microstructure, high temperature resistance, high strength, arc erosion resistance, high density, conductive, thermal conductivity is moderate, widely used in military high-temperature materials, high-voltage switches, electrical alloy, electrical processing electrodes, microelectronics materials, Copper Tungsten as parts and components are widely used in aerospace, aviation, electronics, electricity, metallurgy, machinery, Copper Tungsten sports equipment and other industries.
Characteristics of copper-tungsten
1. Resistance welding Electrodes: The advantages of tungsten and copper, high temperature resistance, arc ablation, high strength, large proportion, conductive, good thermal conductivity, easy to cutting, and has the characteristics of transpiration cooling, because of the high hardness of tungsten, high melting point, resistance to adhesion characteristics, often used to do a certain wear resistance, Copper Tungsten high-temperature resistance of the convex welding, butt welding electrodes.
2. EDM electrode: For tungsten steel, high temperature superhard alloy produced by the mold needs electrical corrosion, the common electrode loss of large, slow. Copper Tungsten and copper Tungsten high electrical corrosion rate, low loss rate, accurate electrode shape, excellent processing performance, can ensure that the accuracy of processed parts greatly improved.
3. High voltage discharge tube electrode: High pressure vacuum discharge tube at work, the contact material will increase thousands of degrees Celsius in the time of a seconds. Copper Tungsten and copper tungsten high corrosion resistance, high toughness, good conductivity, thermal conductivity of the discharge tube stability of the work to provide the necessary conditions.
4. Electronic packaging material: the low expansion of the existing tungsten, but also the high thermal conductivity of copper, its thermal expansion coefficient and conductivity can be adjusted by the composition of the material to be changed.
Use of copper and tungsten
Copper-tungsten alloy composite copper and tungsten advantages, high strength/high specific weight/high temperature/arc ablation/electrical conductivity good/good performance, Copper Tungsten Ank copper-tungsten alloy with high-quality tungsten powder and oxygen-free copper powder, the application of static pressure molding-(high-temperature sintering)-copper infiltration, to ensure product purity and accurate ratio, fine organization, excellent performance.