What is the difference between a vacuum furnace and an atmospheric furnace?

The difference between an atmosphere furnace and a vacuum furnace is that vacuum heat treatment technology is an integrated technology connected with heat treatment technology and vacuum heat treatment technology, which is a total and partial heat treatment performed under a vacuum. process. China classifies vacuum into four kinds: low vacuum, medium vacuum, high vacuum and ultra-high vacuum. At present, the task vacuum of most medium-frequency vacuum heat treatment furnaces is 1.33~1.33×10-3pa.

Vacuum heat treatment can complete almost all heat treatment processes, such as quenching, annealing, tempering, carburizing, nitriding, air quenching, oil quenching, nitrate quenching, water quenching, etc., while vacuum brazing, sintering, surface treatment, etc. The difference between the atmosphere furnace and the vacuum furnace also lies in the high thermal efficiency of the vacuum heat treatment furnace, which can achieve rapid leveling and cooling, can be completed without oxidation, decarburization, non-carburization, can remove phosphorus chips from the surface of the workpiece, and has the effect of degreasing and degassing, and then achieve the effect of surface brightness and purification. The vacuum heat treatment process has good invariance and repeatability. This series of advantages, the development of vacuum heat treatment equipment and technology is more and more attention and more widely used.