Deeply rooted in brazing technology, creating high-quality Brazed Contact Assemblies

Brazing is a welding method that uses a filler metal with a melting point lower than the base metal to fill the gaps between solid workpieces through capillary action, achieving a metal-to-metal connection. Brazed Contact Assemblies are a typical application of this technology. Unlike fusion welding, the base metal does not melt during brazing; compared to pressure welding, brazing does not require applying pressure to the workpiece. Based on the filler metal's melting point, it is divided into hard brazing (>450℃) and soft brazing (<450℃), and the resulting metal joint is called the brazed seam. Its characteristics include minimal joint deformation and a smooth surface, making it suitable for precision and complex components and combinations of dissimilar materials, such as carbide cutting tools and electronic components.

Brazing technology is widely used in aerospace, nuclear energy, and electronic devices, especially suitable for ceramic-metal connections and mass production scenarios. Brazing Electrical Contacts' large-scale production in the electronic device field relies on the technological advantages of this method. Laser-assisted surface micro/nano texturing can improve the wettability of ceramic surfaces and joint strength. Vacuum brazing significantly enhances mechanical properties through optimized filler metal composition and heating parameters.

Firstly, a smooth joint surface, good airtightness, stable shape and dimensions, and minimal changes in the microstructure and properties of the weldment. It can join the same or different metals and some non-metals. Brazed Electrical Contacts leverages this characteristic to ensure product precision and stability. During brazing, the entire workpiece can be heated, allowing multiple welds to be completed at once, increasing productivity. However, brazed joints have relatively low strength, often using lap joints to increase joint strength by increasing the lap length; additionally, the preparation work before brazing requires a high level of expertise.

Secondly, the filler metal melts while the weldment does not. Contact Joining Brazing strictly adheres to this core brazing principle. To ensure a strong connection and enhance filler metal adhesion, flux is used during brazing to remove oxides from the filler metal and weldment surfaces. Hard brazing alloys (such as copper-based, silver-based, aluminum-based, and nickel-based alloys) have high strength and can join load-bearing parts, making them widely used, such as in cemented carbide cutting tools and bicycle frames. Soft brazing alloys (such as tin, lead, and bismuth) have low welding strength and are mainly used for welding non-load-bearing components requiring good sealing, such as containers and instrument components.

Brazing uses alloys with a melting point lower than the base metal as brazing alloys. Upon heating, the brazing alloy melts and fills and holds the joint gap through wetting and capillary action, while the base metal remains solid. The brazed joint is formed through mutual diffusion between the liquid brazing alloy and the solid base metal. Electrical Contact Assemblies' brazed joints are formed through this process. Brazing has minimal impact on the physicochemical properties of the base metal, results in lower welding stress and deformation, can weld dissimilar metals with significantly different properties, can simultaneously complete multiple welds, produces aesthetically pleasing and neat joints, requires simple equipment, and has low production investment. However, brazed joints have lower strength and poorer heat resistance.

Brazing is not suitable for welding general steel structures and heavy-duty or dynamically loaded machine parts. It is mainly used in the manufacture of precision instruments, electrical components, dissimilar metal components, and complex thin-plate structures, such as sandwich components and honeycomb structures. It is also commonly used for brazing various dissimilar wires and cemented carbide cutting tools. Brazing Silver Contacts to Copper Bars, as core electrical components, represent an important application of brazing technology in the electrical field. In brazing, the contact surfaces of the workpieces to be brazed are cleaned and then assembled in an lap joint manner. The filler metal is placed near the joint gap or directly into the gap.

When the workpieces and filler metal are heated together to a temperature slightly above the filler metal's melting point, the filler metal melts and wets the workpiece surface. The molten filler metal flows and spreads along the joint through capillary action. The metals to be brazed and the filler metal then dissolve and interpenetrate, forming an alloy layer. Upon solidification, this forms the brazed joint. The brazed joints of Brazed Electric Contacts achieve a stable bond through this complete process.

Brazing is widely used in machinery, electrical engineering, instrumentation, and radio industries. Brazing is used in a wide range of applications, including carbide cutting tools, drill bits, bicycle frames, heat exchangers, conduits, and various containers. In the manufacture of microwave waveguides, electron tubes, and electronic vacuum devices, brazing is often the only possible connection method. Brazing Electrical Contacts have become indispensable products in the fields of motors, instruments, and radio.

Brazing has advantages such as low heating temperature, smooth and flat joints, minimal changes in microstructure and mechanical properties, minimal deformation, and precise workpiece dimensions, perfectly matching the high-precision machining requirements of Brazed Electrical Contacts.

It can weld both similar and dissimilar materials, with no strict limitations on workpiece thickness differences. This advantage allows Contact Joining Brazings to reliably connect contacts of different materials to the substrate.

Some brazing methods can simultaneously weld multiple parts and joints, resulting in high productivity and meeting the needs of industrial-scale mass production of Electrical Contact Assemblies.

Brazing equipment is simple, and production investment costs are low, reducing the manufacturing cost of Brazing Silver Contacts to Copper Bars.

The joints have low strength and poor heat resistance, and strict pre-welding cleaning requirements, along with expensive brazing filler metal. These problems need to be mitigated through process optimization in the production of Brazed Electric Contacts.

We have deep expertise in brazing process research and development, and production. Our Brazed Contact Assembly precisely meets the core process requirements of brazing technology. Through rigorous pre-welding cleaning, precise gap control, and optimized filler metal ratios, we achieve a strong bond between the contact and the substrate, combining high precision, high airtightness, and excellent conductivity, perfectly adapting to the application needs of various electrical components.

Welcome to inquire and order our Silver Contact Brazed Assemblies. We offer customized brazing assembly solutions to help your products achieve more stable performance!