Why Tungsten-copper Alloys Can Be Used as Electrical Contacts?

Tungsten-copper alloys are widely used as electrical contacts. An electrical contact is a key component used in the transmission and control of power and is commonly found in electrical equipment such as switchgear, relays, circuit breakers and contactors. 

The following is an overview of tungsten copper alloy as an electrical contact material:

Excellent electrical conductivity: Tungsten-copper has good electrical conductivity, which is an ideal combination of the electrical conductivity of copper and the high melting point of tungsten. Compared with pure copper material, it has lower resistance and higher conductivity, which can provide better current transmission and conductivity efficiency.

High wear resistance and corrosion resistance: Tungsten-copper has excellent wear resistance and can maintain stable contact performance in high frequency arc, high current and high temperature environments. In addition, it has excellent corrosion resistance, which resists oxidation and chemical attack, thereby prolonging the service life of electrical contacts.

Stable size and thermal expansion matching: The alloy has good dimensional stability when the temperature changes, and can maintain contact force and connection stability. In addition, its thermal expansion coefficient is close to that of other commonly used materials such as steel and aluminum, which is beneficial to reduce contact failure caused by thermal expansion and contraction.

High strength and pressure resistance: The alloy has high strength and hardness, can withstand large pressure and load, and is not easy to deform and damage. This allows it to maintain good mechanical stability under high current and high load conditions, thereby improving the reliability and life of electrical contacts.

High temperature stability: The alloy has high melting point and good thermal stability, and can maintain stable performance in high temperature environment. It can withstand arc, current and thermal shock at high temperature, reducing the increase of contact resistance and thermal fatigue of materials.

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