Current Effect on the Welding Force and Welding Strength of Silver Tungsten Contacts

If you energize silver tungsten contacts for a short time, on one hand, the temperature of its contact surface will be a sharp rise, on the other hand, it would make silver tungsten contacts short-arc because the current lines near the beam area is curved. The above two conditions will make the silver tungsten contacts melt, that is to say, it would lead to silver tungsten contacts welding. If the current through silver tungsten contacts is close to the critical value of welding current, silver tungsten contacts will be welded to some extent. The material of silver tungsten contacts and its surface state will directly affect the welding resistance properties of silver tungsten contacts. You can reinforce silver tungsten contacts’ welding in case of: there are surface film layers and uneven energized treatment.

Silver tungsten contacts materials have high welding force and welding strength. Silver tungsten contacts’ initial welding current is about 1000A, when the current is 0.9 peaks current, its maximum welding force is around 165N; when the current is 4600A, silver tungsten contacts have the largest welding strength of about 750Pa.




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