... .6-1.0MPa) gas cooling function,it is used for vacuum gas-quenching, annealing, brazing of high- Models: WZDGQ-20, WZDGQ ... .6-1.0MPa) gas cooling function, it is used for vacuum gas-quenching, annealing, brazing of high-speed steel, high alloy ... parts, and for sintering, rapid cooling of magnetic materials. WZGQ Series vacuum high pressure air quenching furnace