Brazing copper and its alloys to be used before mechanical cleaning or sanding way to clear the surface of the oxide , a chemical clean way to remove grease and other contaminants . Copper and its alloys can be used iron , crest , flame, induction , resistance, and other methods of heating furnace brazing. In the oxygen-containing copper furnace brazing can not use hydrogen atmosphere , it should avoid the use of flame brazing large assemblies to avoid hydrogen embrittlement . Brass furnace brazing , to avoid the evaporation of zinc , preferably the surface of the brass plating first , and then brazing. Prolonged heating of the copper alloy lead is likely to precipitate lead , there may be defects in the connector . Aluminum bronze brazing of aluminum in order to prevent the diffusion of the silver solder , Stainless Steel Welding Rodheating time as short as possible , the surface of copper or aluminum bronze , nickel, etc. I belong . Bronze soldering , the best Copper Brazing Alloys temperature below 300 ℃ solder to avoid aging softened. Bronze brazing , the solidus temperature should be selected higher than the quenching temperature (780 ~ C) solder , brazing aging treatment after quenching . For prone to cracking from silicon bronze , phosphor bronze and copper -nickel alloys, be sure to avoid thermal stress cattle production , rapid heating methods should not be used

Soldering flux brazing materials most widely used soft solder is tin- lead solder , and its wettability and spreadability with solder tin content increases. The brazing process and economy are good, joint strength is also well positioned to meet the requirements. w (Sn) 95% or more of the solder material is mainly used in the food industry and Stainless Steel Welding Rod, to reduce lead contamination. S-Sn60Pb and S-Sn63Pb lowest melting temperature , has superior process performance, primarily for the electronic device by hand soldering , wave soldering , brazing and melt dip brazing . S-Sn63PbAg reduce silver layer base material corrosion , to improve the solder creep and fatigue properties . S-Pb60Sn and S-Pb60SnSb solder is the most common , widely used in radiators , pipes, electrical connectors , household products, and engine Aluminum Electrode. Cadmium -based solder is best soft solder solder heat resistance , joints withstand temperatures up to 250 ℃, and has good corrosion resistance. Using cadmium -based brazing copper and copper alloys , the interface is easy to form brittle copper cadmium compounds , it is necessary that such rapid heating resistance brazing method