Vacuum annealing furnace is mainly used for vacuum annealing and aging process of Cu, Ni, Be, Cr, Ti, Zr, Nb, Ta, W, Mo and other metal materials and alloy materials, high speed steel, cold and hot working die steel, stainless steel, elastic alloy, high temperature alloy, soft magnetic material, stainless steel material, titanium alloy, cemented carbide, etc.