Silver brazingManufacturers believe that brazing is one of the methods used by humans in early times to connect materials. Before humans began using iron, brazing was invented to connect metals. In the development of new materials and additive manufacturing in the aerospace field, brazing is almost present in all structures of aircraft and is a key manufacturing technology. Brazing technology is also used in the assembly of pressure, temperature, and speed sensors, the manufacture of aluminum and steel heat exchangers, as well as the production of hydraulic pipelines on old aircraft.

Silver brazing manufacturers believe that brazing refers to a welding method where the filler metal, which has a melting point lower than that of the workpiece, and the workpiece are simultaneously heated to the melting temperature of the filler metal. The liquid filler metal then fills the gaps between solid workpieces, connecting the metal materials. During brazing, it is necessary to remove the oxide film and oil from the contact surface of the base material first so that capillary action can be utilized after the filler metal melts, enhancing its wettability and flowability. Depending on the melting point of the filler metal, brazing can be divided into brazing (filler metal melting point above 450°C, joint strength greater than 200 MPa) and soft soldering (filler metal melting point below 450°C, joint strength less than 70 MPa).

　　Silver brazingManufacturers believe that the application characteristics of brazing mainly include the following aspects:

1. Brazing has a low heating temperature, smooth joints, minimal changes in microstructure and mechanical properties, small deformation, and accurate workpiece dimensions.

2. It can weld similar metals or different materials without strict limitations on workpiece thickness.

3. Some brazing methods can simultaneously weld multiple workpieces and joints, resulting in high production efficiency.

4. Brazing equipment is simple with low production investment costs.

5. Joint strength is low, heat resistance is poor, pre-welding cleaning requirements are strict, and filler metals are expensive.

　　Silver brazingManufacturers consider vacuum brazing as an example; it is a clean and fluorine-free process suitable for high-strength parts with excellent shape stability, free from voids and impurities, resistant to impact and vibration, and able to withstand high pressure. The widespread application of brazing in the aerospace industry is inseparable from its many advantages, such as processing multiple parts simultaneously to help save costs; forming multiple joints at once; uniform heating and cooling of the entire assembly with minimal part deformation. Additionally, brazing can connect materials with different coefficients of thermal expansion, including ceramics.

Silver brazing manufacturers believe that brazing refers to a welding method where the filler metal with a melting point lower than that of the workpiece is heated together with the workpiece to the melting temperature of the filler metal. The filler metal used in copper welding is called solder. Depending on the melting point of the filler metal, brazing can be divided into brazing and soft soldering. Brazing is a high-temperature brazing process. Most brazing temperatures range between 1200°F to 1400°F (much higher than soldering temperatures but much lower than fusion welding temperatures). Regarding the application prospects of brazing technology, an important direction is vacuum furnace brazing, whose flexibility strongly promotes the application of brazing technology in advanced aerospace fields.