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, 1.2510). 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. Before the system is closed, the batch must be checked and approved again. This also includes programming the oven and the start of the cycle. This is done by authorized and highly qualified specialist staff. In order to avoid heating stresses in the lower temperature range (up to ~ 700 ° C), the system is convectively heated up (nitrogen circulation ). The system is only finally evacuated after it has warmed up optimally . The cycle is then continued with radiant heat under vacuum. After the holding time at the hardening temperature, the component or the reference piece gives a signal to quench. This is done with N2 overpressure, as already described. After the process has ended, the system can only be opened and de-charged when it is cold (below 60 ° C) . This guarantees oxidation-free components. 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 Freezing Gas nitriding Plasma nitriding Protective gas hardening Services expert advice Seminars laboratory Quality and environmental policy Downloads 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