Tungsten Copper Spring Contacts
Tungsten Copper Spring Contacts
Spring contact is high and low voltage electrical switches, instrumentation important components responsible for the indirect circuit on and off, while the corresponding load circuit current task. Tungsten copper contact material published since 1935 have been widely used for automatic switching and universal circuit breaker, molded case circuit breaker. Tungsten and copper solution is neither to each other nor is form intermetallic compounds are uniformly mixed by a two-phase single organization "pseudo-alloy". It includes the high temperature, high hardness, low coefficient of expansion of tungsten, while maintaining high electrical conductivity and good thermal conductivity of copper plasticity.
Tungsten copper spring contacts with excellent resistance arc burning and welding resistance, breaking arc performance, good thermal conductivity, thermal expansion, high temperature does not soften, high strength, high density, high hardness and other characteristics. It has good electrical and thermal conductivity, good high temperature strength and certain plasticity. At a temperature above 3000 ℃, copper alloy is liquefied evaporated absorbs heat, reduces surface temperature, so these materials are also referred to as metal materials sweating.
Tungsten copper spring contacts are made by powder metallurgy method high pressure contacts of different shapes. Is the use of high-purity tungsten copper contact of tungsten metal powder excellent characteristics and plasticity, high conductivity copper powder of high purity, etc., by isocratic pressing, high temperature sintering, melting refined copper infiltration process of composite materials.
Tungsten copper spring contacts are widely used as high pressure, ultra-hydraulic switch contacts and circuit breakers, protection ring for electric upsetting anvil block material, conductive Tsui automatic submerged arc welding, plasma cutting machine nozzles, welding, welding of welding head, seam welding wheels, electrodes and spark electrode sealing gas Mao point, spot welding, butt welding materials.
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