Inert gas brazing is about brazing mass-produced parts made of different materials with different types of brazing alloys depending on the application and requirements. The brazing and high-temperature soldering process under inert gas enables you to make a strong, material-locking connection. Copper, nickel and silver solders are used as brazing materials. In our continuous furnaces, we braze stainless steel, steel, copper and brass under inert gas.

The advantages are:

• Cost-effective brazing process for mass-produced parts
• Fluxless soldering
• The surfaces are metallically bright after soldering
• High strengths of the soldered joint
• High process reliability through documentation of the production data

Brazing of Cu / MS materials under inert gas.

For most users today, inductive brazing, but above all flame brazing on a so-called flame carousel, is the state of the art. In both cases, the parts to be brazed are exposed to the room atmosphere at a brazing temperature of up to 750 degrees Celsius. Despite the use of flux, this leads to an unwanted discolouration of the soldered joint due to the oxidation processes that take place, which usually has to be removed afterwards by brushing or pickling. This leads to further follow-up costs in order to be able to chrome or nickel plate them afterwards, for example. The increasingly important environmental concept - "keyword sustainability" - should not be forgotten here either.

We have got an alternative for you!

Brass, copper or red brass parts can be brazed in a protective gas continuous furnace in a cost- and environmentally friendly way. The result is absolutely bright components that can be processed directly. If an electroplated surface, such as chrome or nickel plating, is desired, this can be applied without further preparation.

We braze components made of copper, brass, steel, stainless steel and aluminium on modern automatic flame brazing machines. Depending on the application, it is decided whether soft or hard soldering is used.

Soft soldering takes place up to a temperature of 450 °C. Mainly copper and brass materials are soft-soldered.

Brazing takes place from a temperature of 450 °C. Depending on the requirements, the components can be brazed under gas flux. This means that pickling of the components after the brazing process is no longer necessary.

In induction brazing, the component is heated by an induced current. For induction, the component is placed without contact in a coil through which an electric current flow.        
    
The heat is generated directly in the metal. LWZ brazes on modern induction equipment in the medium frequency range. As a rule, soldering is carried out in air with solder and flux. Brazing under inert gas is also possible.    

Aluminium is becoming increasingly popular in the automotive industry and other areas due to its light weight.

We solder assemblies of the most diverse geometry on modern automatic flame machines.

From pure service to complete assemblies, everything is possible at LWZ.