PURPOSE: To provide a vacuum heat treatment device, capable of rising the temperature of an objective matter of treatment sooner than the rising speed of the temperature in a device so far, capable of providing the same device more inexpensively than the device so far and capable of replacing a heater easily even when the capacity of the heater is specified so as to be same as the capacity of a heater in a vacuum heat treatment device so far.
CONSTITUTION: In a vacuum heat treatment device, an inner tank 2, having a heat capacity smaller than a vessel 1, is arranged in the pressure-tight vacuum vessel 1 having an opening 11 with an interval between wall surfaces 13 in the vessel and a heater 4 is arranged in the outside space 10 of the inner tank while the opening of the vessel is opened and/or closed by a pressure-tight door 7.
SAKONAKA KAZUHIRO
OKUDA HIRONOBU
| JPS62223593A | 1987-10-01 | |||
| JP60185647B |