Vacuum Brazing

Vacuum brazing means that the workpiece is heated in a vacuum chamber and is mainly used for the welding of products requiring high-quality and easily oxidized materials. The vacuum brazing furnace includes a pressure vessel having a cylindrical side wall and a door sized and positioned to close one end of the cylindrical side wall. Workpiece handling systems are mounted on the pressure vessel doors to support metal workpieces for heat treatment or brazing. The workpiece handling system includes means for rotating the workpiece during processing. A vacuum system can be connected to the workpiece to keep the pressure inside the workpiece below atmospheric pressure during the brazing process

Advantage

1. Vacuum brazing, because no flux is needed, significantly improves the corrosion resistance of the product, eliminates various pollution, pollution-free processing equipment costs, and has good safe production conditions;

2. Vacuum brazing not only saves a lot of expensive metal fluxes but also does not require complicated flux cleaning procedures, which reduces production costs;

3. Vacuum brazing filler metal has good wettability and fluidity, and can weld more complex and narrow channel devices. Vacuum brazing improves the yield of products and obtains a firm and clean working surface;

4. Compared with other methods, the inner structure and fixture of the furnace have a long service life, which can reduce the maintenance cost of the furnace;

5. There are many materials suitable for vacuum brazing, such as aluminum, aluminum alloy, copper, copper alloy, stainless steel, alloy steel, low carbon steel, titanium, nickel, Inconel, etc. can be brazed in a vacuum furnace, The designer determines the required materials based on the application of the brazed device, with aluminum and aluminum alloys being the most widely used.

Application

Vacuum brazing is mainly used for aircraft engines, construction machinery, petrochemicals and other wear-resistant parts.