Brazed Silver Contacts
Brazing is an important metal connection technology that is widely used in various electrical devices such as switches, relays, and circuit breakers. Brazed Silver Contacts occupy an important position in these applications due to their excellent conductivity and corrosion resistance. This article will discuss the common methods, material selection, and industry development trends for brazing silver contacts.
Common methods for riveting silver contacts
The following methods are mainly used for brazing silver contacts:
1. Resistance brazing: By utilizing the contact resistance between the silver contact and the contact bridge, the two are brazed together by heating with a large current. Flux needs to be added during welding.
2. Flame brazing: Use flame heating to heat the silver contact and the conductive material to the brazing temperature to combine the two.
3. High-frequency induction brazing: Use high-frequency induction heating equipment to quickly and evenly heat the silver contact, thereby achieving efficient welding.
Material selection for silver contacts
The material selection of Button Contacts Trimetal Overlays is crucial, and high-purity, impurity-free silver is usually used as the raw material. During the brazing process, the silver oxide generated on the silver surface is unstable and easy to braze. Soft soldering can use tin-lead solder with zinc chloride aqueous solution or rosin as a brazing agent; hard brazing often uses silver solder with borax, boric acid, or their mixture as a brazing agent.
Industry Development Trend
With the advancement of technology, the brazing material industry is moving towards reducing the silver content. By adding low-temperature elements and rationally designing the formula, the production cost can be reduced while maintaining the performance of the brazing material unchanged. In addition, low silver is a research hotspot in the future, and a lot of research has been carried out abroad in this regard.
Conclusion
Braze silver contacts play an irreplaceable role in electrical equipment. By continuously optimizing the welding process and material formula, the welding quality and production efficiency can be further improved. In the future, with the development of low silver technology, the cost of brazing silver contacts is expected to be further reduced, thereby promoting its application in a wider range of fields.