Explain the development of copper-tungsten alloy contacts

    Professional copper-tungsten alloy contact material is an alloy produced from tungsten with high melting point and toughness and copper with high conductivity, heat transfer capacity, and high logical thinking ability. This series of alloy contact materials has the advantages of good resistance to arcing corrosion, arc welding resistance and high toughness. in oil breaker and SF. The circuit breaker and the power switch circuit breaker of his plastic atmosphere are not easy to be oxidized by air, and are not easy to SF. Dissolution has less disturbance and less contact wear. In recent years, with the improvement of contact structure and magnetic blowing material, the breaking volume of copper-tungsten contacts has been greatly improved, such as 1200MVA in low oil circuit breakers and SF. Among the high voltage circuit breakers, the limit breaking current has reached 63kA~80kA, the working voltage is 72.5kV~78.5kV, and the rated voltage is 2500A~3150A.

    At this stage, scientific researches on diversified copper-tungsten contact materials have been reported. Adding alloy nickel to the customization of copper-tungsten alloy contacts can further improve its resistance to solitary corrosion. At the same time, innovation and upgrading of manufacturing and processing technology continue to promote. According to some analysis reports, in order to improve the ablation resistance of copper-tungsten contacts in the air, when the tungsten powder particles are optimized to about 5um, the tungsten composition is increased to 80%~90%, which can reduce the ablation rate at least. However, the manufacturing quality of China's copper-tungsten contact materials is still unstable, and some manufacturers have insufficient understanding and immature grasp of some important aspects of the manufacturing process technology.

    With the development trend of copper-tungsten alloy contact wholesale materials, copper-tungsten alloy can also very well achieve corona dischargers (sparkgap), CO2 laser generators, laser excitation devices and electrical-grade materials for wire-cut EDM, etc. regulations, and has gradually penetrated into the above industries, expanding the scope of application.