JPS6428357A - Ion carbonitriding furnace - Google Patents

Abstract

PURPOSE:To reduce shock loaded on especially a cathode in the titled furnace by constituting the furnace so as to executing ion carburizing or ion nitriding under condition of shifting a material to be treated onto the cathode from the supporting body for supporting the material to be treated separately arranged with the cathode in the furnace shell. CONSTITUTION:At the time of carrying the material 5 to be treated into the furnace, the material 5 to be treated is put on the supporting body 11 by ascending the supporting body 11 or descending the cathode 12. At the time of ion carburizing or ion nitriding treatment, the material 5 to be treated on the supporting body 11 is shifted onto the cathode 12 by descending the supporting body 11 or ascending the cathode 12. Then, under this condition, heating of the material 5 to be treated, supplying of treating gas and generating of glow discharge between the material 5 to be treated and an anode 2 are executed, to execute the ion carburization or ion nitriding. Then, as the material 5 to be treated is supported on the cathode 12 apart from the supporting body 11, the flow of the treating gas at lower part of the material 5 to be treated and heat transfer from a heater 7 are good and the dispersion of the depth of the carburization and the nitriding can be reduced.