What are the common types of brazing?

There are usually two kinds of commonly used brazing. One is hard solder, whose melting point is above 450℃. Commonly used solders include copper-based, silver-based, aluminum-based and nickel-based alloys. Borax, boric acid, chloride, fluoride, etc. Usually used as flux. The heating sources of brazing are torch flame, resistance electric heating, induction heating, salt bath heating and furnace heating. The brazing joint has high strength and is suitable for brazing workpieces with high stress or working temperature, such as cemented carbide tools and bicycle frames. This kind of brazing is usually called brazing. The other is soft solder with melting point below 450℃. The most widely used solder is tin-based alloy, and the suitable welding temperature of most solder is 200-400℃. The flux is a zinc solution in which rosin and terpineol are dissolved, and the heating method is usually iron heating. The strength of brazing joint is low, which is suitable for workpieces with low brazing force or low working temperature, such as containers and instrument parts. This kind of brazing is usually called brazing. Soldering is a kind of soldering.

Brazing is the filler metal that forms the brazed joint, and the quality of the brazed joint depends largely on the filler metal. brazing filler metal

It has suitable melting point, good wettability and joint filling ability, can diffuse with the substrate, and should also have certain mechanical properties and physical and chemical properties to meet the performance requirements of the joint.