Roller furnace HICON

heat treatmentannealingthermal

This type of furnace was specially developed for soft annealing to achieve globular cementite in medium and high-alloyed tool steels, high speed steels, cold heading and bearing steels. As well as taking care of the as-annealed quality factors, this design of furnace also minimizes process atmosphere consumption (nitrogen only) to improve economy. A CO2 control system automatically calculates and regulates the required process atmosphere (nitrogen). Processing temperature range of 400 °C to 950 °C (1050 °C). Net throughputs of between 2,000 kg/h and 10,000 kg/h can be achieved depending on the size of the facility and the heat treatment program selected. These furnaces are built with a standardized hearth width (charge width) of 1750 mm or 2250 mm. Other widths are available on request. For certain steel grades requiring an extremely high cooling gradient (up to 300 K/min), the roller-hearth furnace can be equipped with a HICON jet cooler. The facility can be implemented to comply with the standards required by the automotive industry, in accordance with CQI-9 (AIAG). Advantages of the EBNER design. optimum spheroidization of the microstructure up to 100 % and/or formation of a perlite/ferrite microstructure precise zone control with very tight temperature tolerances decarb-free thanks to process atmosphere know-how long service life and low maintenance requirement on components subjected to high thermal or mechanical stress (radiant tubes, hearth rollers, bearings, etc.)