Brazing refers to the welding method of using liquid filler metal to fill the crack of solid workpiece after the solder and the solder are heated to the melting temperature of the solder at the same time below the melting point of the solder.

The ways of brazing are: high-frequency induction brazing, flame brazing, resistance brazing, furnace brazing, phase brazing, soldering iron brazing, ultrasonic brazing, etc.

Brazing deformation is small, the joint is smooth and beautiful, suitable for welding precision, complex and composed of different materials, such as honeycomb structure plate, turbine blade, carbide tool and printed circuit board, etc. Before brazing, the workpiece must be carefully processed and strictly cleaned to remove oil pollution and excessive thick oxide film to ensure the assembly gap of the interface.