Performance Requirements of Tungsten Copper Contacts

Tungsten copper contacts materials, also known as tungsten copper electrical contacts materials, which is used to control the current of the switch- on and off, mainly used in contact switch, magnetic motors, relays, circuit breakers and other components. Contacts performance will directly affect the operation of the entire electrical system function, especially modern automatic control systems, communication systems and other large power system, because there are many contacts in them, if one or several of whose performance will derogate, it will make this system work in a mess, can not even run, therefore, the performance of tungsten copper contacts work performance should be improved.

Performance requirements of tungsten copper contacts are shown as follows:
1. In order to reduce heat loss when current flows through the contacts and reduce the tungsten oxide of contacts surface , tungsten copper contacts are required to have high electrical conductivity, thermal conductivity;
2. Under the arc or spark action, in order to reduce contact wear and the likelihood of the occurrence of welding of the contacts, tungsten copper contacts required to have a high melting temperature, high boiling point, high melting and evaporation heat and high heat;
3. Stable chemical performance, and its requirements of being polluted by the environment is that the change of contact resistance is small; the contact resistance is stable;
4. Appropriate elasticity and hardness, if the hardness is too large, the contact area is small, and if flexibility is greater when the contact is closed, the wear due to bounce between the contacts will increase;
5. It has an easy machining, welding performance;
6. Lower prices.

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