A brazing rod can be purchased with a flux coating already applied, or any one of the numerous fluxes available on the market for specific application may be used.
ALUMINUM SOLDERING FLUX FREE
It destroys the oxides and floats them to the surface, leaving a clean metal surface free from oxidation. The strongest brazed joint is one in which the molten filler metal is drawn in by capillary action, requiring a close fit.Ī brazing flux is necessary to obtain a good union between the base metal and the filler metal. Parts to be brazed must be securely fastened together to prevent any relative movement. The surrounding surfaces must be cleaned of dirt and rust. In brazing, the edges of the pieces to be joined are usually beveled as in welding steel. The brazing metal adheres to the base metal by molecular attraction and intergranular penetration it does not fuse and amalgamate with them.
When metals are joined by brazing, the base metal parts are not melted. Brazing can also be used to join dissimilar metals, such as copper to steel or steel to cast iron. Also, any metal part that is subjected to a sustained high temperature should not be brazed.īrazing is applicable for joining a variety of metals, including brass, copper, bronze and nickel alloys, cast iron, malleable iron, wrought iron, galvanized iron and steel, carbon steel, and alloy steels. However, because the strength of a brazed joint is not as great as that of a welded joint, brazing is not used for critical structural repairs on aircraft.
However, that definition has been expanded to include any metal joining process in which the bonding material is a nonferrous metal or alloy with a melting point higher than 800 ☏, but lower than that of the metals being joined.īrazing requires less heat than welding and can be used to join metals that may be damaged by high heat. Torch Brazing of SteelThe definition of joining two pieces of metal by brazing typically meant using brass or bronze as the filler metal.
0 kommentar(er)
