Properties Requirements of Tungsten Copper Points

Tungsten copper points, which can be applied to control the current of the switch, and mainly play a role in relays, contact switch, breakers, magnetic motors and other parts, also namely tungsten copper electrical points. Points properties will directly have an effect on the work of the entire electrical system, particularly communication system, modern automatic control system and other large power system, the system will work in a mess or even can’t run if one or more points in them, whose properties derogate, so, the work properties of tungsten copper points should be improved.

Properties requirements of tungsten copper points can be seen as below:
1. Require the points owning good electrical conductivity and nice thermal conductivity to reduce heat loss and the tungsten oxide on the surface of points;
2.Require points material having high boiling point, high melting points, high melting heat and evaporation heat  to reduce contact wear and the occurrence of welding of the points under the arc / spark action;
3. Require the point having stable chemical properties, stable contact resistance, and small change of contact resistance when it being polluted by the environment;
4. Require the points possessing appropriate elasticity and hardness, the contact area would be small when the hardness is too large,  due to bounce between the points, the wear will increase when the flexibility is greater;
5. Own the properties of easy machining and welding;
6. The price is lower.



 

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