Brazing is a welding method that connects metals

Brazing refers to a welding method in which the solder below the melting point of the solder and the solder are heated to the melting temperature of the solder at the same time, and then the gap of the solid workpiece is filled with the liquid solder to connect the metal. When brazing, firstly remove the oxide film and oil stains on the contact surface of the base material, so that the capillary will play a role after the solder is melted and increase the wettability and capillary fluidity of the solder. According to the melting point of the solder, brazing is divided into brazing and soft brazing.The brazing deformation is small, and the joints are smooth and beautiful. It is suitable for welding precise, complex components and components composed of different materials, such as honeycomb structural plates, turbine blades, cemented carbide tools and printed circuit boards. The weld formed by brazing is called brazing. The filler metal used in brazing is called brazing filler metal. The cleaned surfaces of the workpieces are assembled together in a lap type, and the solder is placed near or between the joint gaps. When the workpiece and the solder are heated to a temperature slightly higher than the melting point of the solder, the solder melts and is sucked into and fills the gap between the solid workpiece by capillary action. The liquid solder and the workpiece metal diffuse and dissolve each other, and the solder is formed after condensation. Welding head.