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, reduce the surface temperature of the material. Copper Tungsten So this kind of material is also called metal sweating material.
Copper-tungsten alloys have a wide range of uses, mainly for the manufacture of Arc-ablation high-voltage electrical switch contacts and rocket nozzle throat liner, Copper Tungsten tail rudder and other high-temperature components, also used as electrical processing electrodes, high-temperature molds and other requirements of conductive thermal conductivity and high-temperature use of the occasion.
About copper and tungsten, then let's take a look at the density of copper and tungsten and the characteristic uses of copper and tungsten.
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, Copper Tungsten widely used in military high-temperature materials, high-voltage switches, electrical alloy, electrical processing electrodes, microelectronics materials, as parts and components are widely used in aerospace, aviation, electronics, electricity, metallurgy, machinery, 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, Copper Tungsten resistance to adhesion characteristics, often used to do a certain wear resistance, 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. and copper Tungsten high electrical corrosion rate, low loss rate, accurate electrode shape, excellent processing performance, Copper Tungsten 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. 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, Copper 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.