Welding Properties of Silver Tungsten Contacts

Because there are Joule heat and arc high temperature function between tungsten silver contacts, so their surface will reach a molten state in the opening and closing moment, which will be solidified in the cooling process and weld after that, leading a working contact no longer disconnected. If machinery is poorly designed or prepared improperly, it can cause silver tungsten contact bounce and short arc, at this time, its welding problem will be very prominent.

Anti-welding properties of silver tungsten contacts depend on the welding force of silver tungsten contacts; welding force refers to the force needed to be applied to separate the two already welded silver tungsten contacts, its size is related to the tensile strength of silver tungsten contacts material. If the contact material’s toughness is better, the tensile strength of silver tungsten contacts will be stronger, and the welding force will be greater, and the worse of its anti-welding properties; on the contrary, if the tensile strength of silver tungsten contacts is smaller, and the welding force will be smaller, and the better of its anti-welding properties.



 

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