Vacuum brazing is a high-cleanliness, high-precision metal joining technique widely used in aerospace, electronics, medical, heat exchanger, and tooling industries. It is particularly suitable for components requiring exceptional joint quality and surface cleanliness. With extensive project experience and custom engineering capabilities, Brother Furnace provides stable and efficient vacuum brazing solutions to clients worldwide.

The following case demonstrates how we helped a heat exchanger manufacturer with strict precision requirements achieve a clean, flux-free brazing process between copper and stainless steel components.

Customer Background

The client is a precision engineering company based in Europe, specializing in the production of high-performance heat exchangers. They required a solution to achieve high-quality brazing of complex copper and stainless steel assemblies while avoiding oxidation and joint defects.

The Challenge

The client previously relied on traditional flux-based brazing methods, which caused contamination at the joints and required extensive post-braze cleaning. They needed a cleaner, more reliable process that could also maintain consistency and efficiency in high-volume production.

Our Solution

Brother Furnace provided a custom-built horizontal vacuum brazing furnace with the following features:

• Maximum operating temperature: 1150°C

• Ultimate vacuum level: 10⁻⁵ mbar

• Heating element: Graphite for uniform heat distribution

• Partial pressure control with nitrogen backfilling

• Multi-stage programmable temperature control for precise ramp/soak profiles

Results

• Achieved clean, flux-free brazing between copper and stainless steel

• Reduced post-braze cleaning time by over 80%

• Significantly improved joint strength and surface appearance

• Increased production efficiency through batch processing

Customer Feedback

“Brother Furnace delivered the ideal solution for our application. The system operates reliably and produces high-quality brazed joints, enabling us to scale up production without compromising on quality.”
— Process Engineering Manager