Gas circulation technology of vacuum tempering furnace and gas quenching furnace

Gas circulation technology of vacuum tempering furnace and gas quenching furnace

 In order to overcome the low temperature vacuum tempering, easy to cause uneven heating and vacuum tempering after cooling speed slower, etc, were using forced gas circulation at the time of heating and cooling heat transfer technology, using two gas circulation system in the structure.
  Vacuum tempering furnace gas circulation system, set on the top of the furnace thermal cycling fan, when heated to charge a small amount of N2 (about 0.05 MPa), and start the fan, the gas flow through the heater to workpiece, the formation of convection heating, in order to ensure the uniformity of heating workpiece, at the same time, improve heating efficiency.
  Gas circulation second measures is set up in the back of my furnace cooling fan, cooling the recharge N2 of 0.12 ~ 0.13 MPa, can join a proportion of H2, when necessary to prevent oxidation, cooling gas through the heat ex-changer and the wind deflector, forced convection flow artifacts formation circulation cooling, because the cooling speed increases, helps to avoid some of the steel tempering brittleness, shorten the production cycle, improve the productivity.