1, the joints smooth surface, good air tightness, the stability of the shape and size of the organization and performance of the weldment little change, can be connected to the phase The same or different metals and some non-metallic. Brazing, can be applied to the heating of the workpiece as a whole, a lot of welding a welding finished Joints, and improve productivity. Lower the strength of brazed joints, the use of the lap joint, and rely on to improve by increasing the length of lap Joint strength; In addition, the preparatory work before the brazing higher. At present,Welding Electrodes in mechanical, electrical, instrumentation, radio, etc. The departments have been widely used. 2, solder melting solder does not melt. In order to brazing part is securely connected, and enhance the solder attached to the role, brazing to Flux in order to remove the filler metal and the weldment surface oxides.Brazing Alloy (such as copper, silver-based, aluminum, nickel-based, etc.), with High strength can be connected to the load bearing parts, used widely, such as cemented carbide cutting tools, bicycle frame. More filler metal (such as tin, lead, bismuth, etc.), the weld strength is low, mainly used for welding does not bear the load but requires good seal weldment Such as container, instrument components. Brazing is widely used mainly in the manufacturing of mechanical, electrical, instrumentation, radio.