The vacuum heat treatment furnace opens up new avenues for improving the heat treatment process and improving the quality of mechanical products. The vacuum heat treatment furnaces currently promoted, applied and developed are mainly vacuum furnaces with resistance heating.
According to the degree of vacuum, it can be divided into: low vacuum furnace (1333Pa ~ 1.33 × lO-1Pa), high vacuum furnace (1.33 × lO-1Pa ~ 1, 33X10-4Pa) and ultra high vacuum furnace (1.33 × 10-4Pa or more by furnace) The structure and heating method can be basically divided into an external heat type vacuum furnace (also called a hot wall vacuum furnace) and an internal heat type vacuum furnace (also called a cold wall vacuum furnace).
