Vacuum furnace development history

Vacuum furnace development history 

 Structure, the heating process, temperature control and furnace atmosphere, such as vacuum furnace, will directly affect the quality of products after processing. In the forging furnace, improve the heating temperature of the metal, can reduce the deformation resistance, but the temperature is too high will cause grain growth, oxidation or burnt, seriously affecting the quality of the workpiece. During the heat treatment, if the steel is heated to a point above the critical temperature, and then suddenly cooled, can improve the hardness and strength of steel; if heated to a point below the critical temperature after slow cooling, the hardness of the steel but also make leaving lower toughness increased.
In order to obtain accurate dimensions and surface finish of the workpiece, or to reduce the metal oxide in order to protect the mold, reducing the allowance purposes, you can use a variety of small non-oxidation furnace. Less in the open flame no oxidation furnace, use of incomplete combustion of the fuel reducing gas, in which the heating of the workpiece can be reduced to 0.3% or less oxidation loss rate.
Vacuum furnace is controlled using the atmosphere artificially prepared, can be introduced into the furnace gas carburizing, carbonitriding, bright quenching, normalizing, annealing heat treatment: in order to change the microstructure, the purpose of improving the mechanical properties of the workpiece. The particles in the flow furnace, the combustion of the gaseous fuel, or other fluidizing agents externally applied force flowing hearth graphite particles or other inert particle layer, buried in the workpiece can be achieved in the particle layer reinforced heating, can also be infiltration carbon, nitrogen, and other non-oxidizing heating. In a salt bath furnace, a molten salt solution as a heating medium, prevent oxidation of the workpiece and decarbonization.
With the development of technology, we now have a variety of highly efficient vacuum furnace,such as heat treatment vacuumfurnace,Sintering vacuum furnace,Carburizing vacuum furnace,Nitriding vacuum furnace,Gas quenching vacuum furnace,Induction vacuum furnace,Soldering vacuumm furnace,Vacuum induction melting furnace,Lab vacuum furnace,Vacuum melting furnace,Special purpose vacuum furnace.