Vacuum carburizing furnace and vacuum carburizing treatment method
AssigneeDowa Thermotech Co., Ltd.
InventorsDaiki SHIBATA, Minoru FUJIWARA, Masao KANAYAMA
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Abstract
A vacuum carburizing treatment method, includes: supplying an inert gas into a heating chamber in which a carburizing treatment is performed on a workpiece, making the pressure in the heating chamber become a pressure equal to or higher than an atmospheric pressure, and then opening a charging port for the workpiece provided at a bottom portion of the heating chamber; charging the workpiece from the charging port; increasing the temperature inside the heating chamber to a temperature at which a vacuum carburizing treatment is performed; and supplying a carburizing gas into the heating chamber that has been vacuum-evacuated and performing a vacuum carburizing treatment on the workpiece.
Claims2
A vacuum carburizing treatment method, comprising:
- supplying an inert gas into a heating chamber in which a carburizing treatment is performed on a workpiece, making the pressure in the heating chamber become a pressure equal to or higher than an atmospheric pressure, and then opening a charging port for the workpiece provided at a bottom portion of the heating chamber;
- charging the workpiece from the charging port;
- increasing the temperature inside the heating chamber to a temperature at which a vacuum carburizing treatment is performed;
- and
- supplying a carburizing gas into the heating chamber that has been vacuum-evacuated and performing a vacuum carburizing treatment on the workpiece.
Dependencies are inferred from the claim text.