Process - vacuum hardening This process has become an indispensable part of a modern hardening shop. The advantages of a clean surface without being influenced by scale formation, decarburization or carburization are state of the art today. The dimensional change and warpage behavior of the components has also improved significantly compared to conventional methods. One should not forget, however, that the catchphrase "FREE OF DELAY" is not serious here either, since physics cannot be bypassed even in a vacuum. It is obvious that the technology in furnace construction has not stopped in the meantime. The HTR company uses a new generation of vacuum furnaces. These have a new, patented cooling system, with the option of choosing different flow directions during quenching, which in turn benefits the warpage and dimensional change behavior. Thanks to the patent we use, materials can also be treated in a vacuum that were previously only oil-hardenable (e.g. 1.2842, 100 Cr 6). Of course, a dimension limitation is logical here. How does such a process work? The parts are washed and properly charged After the batch is in the oven, thermocouples are set. In addition to charging, this is an essential process. Since we do not run the batches empirically, but control the component or a reference piece of the system, this step is of great importance. Bevor die Anlage geschlossen wird, muss die Charge nochmals kontrolliert und freigegeben werden. Dazu gehört auch das Programmieren des Ofens und der Zyklusstart. Dies geschieht durch autorisiertes und hochqualifiziertes Fachpersonal. Um im unteren Temperaturbereich (bis ~700°C) Anwärmspannungen zu vermeiden, wird die Anlage konvektiv hochgeheizt (Stickstoffumwälzung). Erst nach der optimalen Durchwärmung wird die Anlage endgültig evakuiert. Der Zyklus wird dann mit Strahlungswärme unter Vakuum weitergefahren. Nach der Haltezeit auf Härtetemperatur gibt der Bauteil bzw. das Referenzstück Signal zum Abschrecken. Dies geschieht mit N2 - Überdruck, wie schon beschrieben. Die Anlage kann nach Beendigung des Prozesses nur im kalten Zustand (unter 60°C) geöffnet und dechargiert werden. Dies gewährleistet oxydationsfreie Bauteile. All of these procedural advantages and procedures described enable us to further improve and optimize a technology that has already been tried and tested. An optimally heat-treated component is the basic requirement for a functioning tool, and we ensure this with our state-of-the-art process and system technologies. VACUUM HARDENING Furnace size: 1200 x 900 x 900 mm Home The enterprise The team Procedure Vacuum hardening Gas nitriding Plasma nitriding plant Inert gas heat treatment Services expert advice Seminars Analyzes Quality and environmental policy Events credentials Jobs Contact | imprint HTR Rosenblattl GmbH | 4600 Thalheim near Wels | Am Thalbach 7 | Austria Tel .: +43 7242 206699 | office@htr-rosenblattl.at | www.htr-rosenblattl.at