Vacuum/overpressure sintering furnace

The utility model provides a vacuum /overpressure sintering furnace which comprises a furnace body, a vacuum pumping device and an air inflating pressurizing device. Electric heating bodies are arranged inside a furnace chamber. The utility model has the improvement that the utility model has a low voltage power supply 1, and the lower part of the furnace chamber is provided with a set of vacuum sintering electric heating bodies 2 and a set of overpressure sintering electric heating bodies 3. In the process of vacuum sintering, the vacuum sintering electric heating bodies 2 at the lower part of the furnace chamber and the electric heating bodies 4 at the upper part of the furnace chamber are switched on with the low voltage power supply 1 through a transfer switch 5. In the process of overpressure sintering, the overpressure sintering electric heating bodies 3 at the lower part of the furnace chamber are switched on with the low voltage power supply 1 through the transfer switch 5. The utility model has the advantages of low cost, less power consumption and obvious energy-saving effect.