Important Applications of Low-Temperature Vacuum Aluminum Brazing Furnace

2026-04-02 09:02

Fundamentals of Vacuum Aluminum Brazing

Vacuum aluminum brazing is a highly advanced and crucial metal joining technology in modern manufacturing. It’s a process that, in a vacuum environment, uses a filler metal with a lower melting point than the base metal (the metal being welded). The filler metal is heated to melt, and capillary action is used to join two pieces of aluminum together.

SIMUWU RVB-7710L horizontal vacuum brazing furnace for high-precision aluminum alloy heat exchanger joining

Oxide Film Removal and the Role of Magnesium

Aluminum is a very reactive metal, always covered with a dense film of alumina. This film has an extremely high melting point (approximately 2050°C), while aluminum itself melts at around 660°C. In a vacuum furnace, heating and the addition of trace amounts of magnesium (Mg) as a deoxidizing agent are used. The magnesium evaporates at high temperatures, breaking down and peeling away the oxide film on the aluminum surface, allowing the filler metal to smoothly wet the base metal. Removing air ensures that the aluminum does not react with oxygen again during the welding process.

High-Performance Applications across Industries

Due to its high strength, lightweight, and high cleanliness, it can be applied in various industries, including but not limited to:

Aerospace: Aircraft hydraulic systems, radar housings.
New Energy Vehicles: Battery cooling plates, motor cooling systems.
Power electronics: High-power IGBT heat sinks, inverter cold plates.

Technical Specifications of SIMUWU RVB-7710L

The equipment used for vacuum aluminum brazing is crucial, directly affecting the core performance and quality of the brazed metal. SIMUWU’s RVB-7710L vacuum brazing furnace boasts a precise design, ensuring both high vacuum levels and extremely high yield rates. Equipped with a Siemens S7-1200 PLC and a comprehensive process library, it can perfectly execute all processes involved in vacuum aluminum brazing. Its specific parameters are as follows:

Furnace design	Horizontal type,front and rear door opening
Working zone size	700(W) x 700(H) x 1000(L)mm
Loading capacity	800kg (with fixture and jigs)
Power supply	380V (3 phase)/50HZ
Heating power	100 KW
Installed power	150 KW
Max.design temperature	750℃
Working temperature	RT(Room Temperature)-700℃
Temperature control accuracy	±1℃(Vacuum，Empty, 600℃)
Temperature uniformity	±5℃, 9 points temp testing
Temperature control components	PLC
Thermal couple	“K” Type
Heating rate	0-20℃/ min
Ultimate vacuum degree (drying&degassing )	6.7×10-4Pa
Working vacuum degree	6.7×10-3Pa
Pressure rising rate	≤0.5Pa/h
Temperature control	PLC
Control mode	PLC Automatic/manual interlock protection
Equipment color	Customized