Vacuum heat treatment, as its name implies, is heat treatment in vacuum state. Vacuum state is the so-called negative pressure. The lower the pressure, the greater the vacuum degree, the less the gas in vacuum equipment, and the smaller the oxygen content of parts, which can prevent oxidation. There are many kinds of vacuum heat treatment furnace, such as vacuum annealing furnace, vacuum quenching furnace, vacuum tempering furnace, vacuum carburizing furnace, vacuum brazing furnace and vacuum sintering furnace.
Vacuum heat treatment furnace has high thermal efficiency, can achieve rapid heating and cooling, can achieve no oxidation, no decarbonization, no carburization, can remove the phosphorus chip on the surface of the workpiece, and has the function of degreasing and degassing, so as to achieve the effect of surface bright purification. Generally speaking, the processed workpiece is heated slowly in the furnace, the difference of internal heat temperature is small, the thermal stress is small, so the deformation is small; it can reduce costs, have degassing effect, thereby improving the mechanical performance and service life of the work; the working environment is good, the operation is safe, and there is no pollution and pollution.
Vacuum heat treatment can achieve almost all heat treatment processes, such as quenching, annealing, tempering, carburizing, nitriding, gas quenching, oil quenching, nitrate quenching, water quenching, vacuum brazing, sintering, surface treatment, etc. in the quenching process, so it is more and more widely used in the heat treatment industry.
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