Vacuum Brazing – Principle
The oxide film on the metal surface during soldering affects the wettability of the liquid solder to the base metal. During the brazing process, if the oxidase on the surface of the base metal cannot be effectively removed, it is difficult to form a high-quality brazed joint. Different brazing methods use different deoxidizing films and anti-oxidation measures. Generally, the brazing method removes the oxide film by the chemical action of the flux or by the reducing action of a reducing atmosphere.
Although vacuum brazing does not have the chemical action of the flux and the reducing effect of the reducing atmosphere, the vacuum reduces the partial pressure of oxygen in the soldering zone, which can remove the oxide film on the surface of the weldment and protect it from oxidation. In this way, brazing in vacuum can obtain high-strength, bright and dense joints.
View more vacuum components at www.labideal.com.
