For more complex alloys, vacuum furnaces are often the best option for heat treating and brazing. As their name suggests, vacuum furnaces evacuate all atmosphere in order to prevent unwanted chemical reactions from occurring during the heat treating or brazing process and to allow metallurgists to design in-depth thermal processes for complex alloys. During heat treating, these impressive machines are able to heat complex alloys weighing up to 8,000 pounds in uniform intervals until it reaches the austenitizing temperature. And once this process is complete, there’s no need for quenching by dipping in a liquid solution, since the furnace can be back-filled with nitrogen, or other gasses like Argon, for cooling. Quench gasses in vacuum furnaces are able to reach quench pressures of up to 20 bar.
As with all Paulo equipment, our vacuum furnaces are integrated with our Production Information and Customer Service system (PICS), which allows for tight control over elaborate thermal cycle designs, including variables like heating rates and pressure. And because the process takes place in a vacuum, our engineers can measure exactly what’s happening to your parts, rather than measuring conditions in the furnace as a whole.
Our vacuum brazing furnaces also allow for the process of brazing—joining two materials by melting an alloy between them—to be conducted without fear of contamination from other materials. For loads up to 44 inches by 42 inches by 60 inches, our vacuum brazing furnaces achieve precise, computer-controlled temperature control settings during both heating and cooling for optimal results.