Vacuum-brazing is one of the most universal joining technologies of all. It enables the developer and production manager to design and manufacture components in modular design. Starting from simple semi-finished products, complex components can thus be realised at low cost and the expenditure for pre-machining and post-machining can be reduced. The flexibility in terms of function and cost is significantly extended.
Vacuum-brazing or reflow brazing under vacuum is a soft brazing process used in electrical engineering for void-free brazing of surface-mounted components (so-called SMD components) on DBC substrates. The joining of the materials, which are usually made of different materials, takes place in a vacuum under reduced pressure at temperatures of up to 450 °C (soft solders). Among other things, the vacuum helps to minimize oxidation of the two parts and the solder.
The controlled use of process gases such as nitrogen, forming gas and hydrogen (reduction of oxide layers) is simplified by vacuum-brazing. Nitrogen enriched with formic acid can also be used to reduce oxide layers in vacuum-brazing.
Vacuum-brazing is used for the power supplies of voltage transformers, actuator controls and radar systems in aviation, assemblies for power semiconductor IGBT modules, for MOS, diode and thyristor modules, contactless relays (Solid State Relay), ignitions, electronic steering assistance, ISAD-integrated starters, alternators, diesel pump and actuator control, air conditioner control, intelligent power switching and power controls for hybrid drives in the automotive industry, frequency converters, pump control, railway drives, power supplies, drive controls and cooling technology (e.g. lasers, Peltier-Electrics). e.g. lasers, Peltier elements).
Starting from simple semi-finished products, complex components can be realized at low cost and/or the effort for pre- or post-processing can be reduced. The flexibility in terms of function and cost is significantly extended.
High reproducibility due to very good temperature uniformity and comfort Control of modern furnace systems incl. process documentation.
High strength, even at high operating temperatures. High connection quality due to vacuum atmosphere
Avoidance of flux.
Large components can be joined.
Almost unlimited range of materials can be used (base materials and solders).
Low warpage due to uniform oven heating.
No oxidation and tarnishing.
Hardening and annealing can be integrated in the process.
Combined heat treatment possible (brazing and hardening)
Possibly high expenditure for component fusing, since component cannot be manipulated in the furnace.
The entire component is heated, resulting in a loss of hardness in the case of already quenched and tempered or work-hardened materials.
Mostly batch process with individual batches, continuous production only possible with very complex plant engineering
In our brochure about vacuum-brazing you will find all the information at a glance as well as practical application examples to print out.
Lorem
Some examples of application areas
The material-locking joining process vacuum-brazing enables the joining of similar as well as dissimilar materials. A wide range of materials, from for simple structural steels, through the high-alloyed cold- and Hot work steels up to super alloys, as well as non-ferrous metals such as copper and titanium and even ceramics, hard metals and the cutting materials CBN and diamond. can be joined by means of vacuum brazing technology.
For testing different material combinations we offer here a material matrix for Vacuum-brazing.
Temperature management – potential and challenge for vacuum-brazed components Technical article in Schweißen und Schneiden 2019 > > to the technical article
Contour-related temperature control for injection moulds Press report KC-aktuell 2011 >> to the technical article
Vacuum-brazing in Tool & die-making Close-contour temperature control for injection moulds and mould inserts Technical report in “Der Stahlformenbauer” 1/2012 >> to the technical article
The early use of our materials expertise reduces costs and accelerates product and process developments.
The use of high-performance materials is a key factor in strengthening competitiveness. In combination with optimized processing and finishing, an advantageous cost-benefit ratio is achieved. Through time-limited project support and/or project management, the company’s own development resources are also strengthened at short notice, thus shortening the time-to-market. An active network to the leading research institutes as well as material and plant manufacturers enables a fast know-how transfer into the innovation process of our customers.
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With our know-how you open up the problem-free entry into new technologies. Our materials expertise helps you to bring products with innovative material properties to market and thus strengthen your competitive position.
