Brass tube well type vacuum annealing furnace

When quenching special long workpieces, the brass tube well vacuum annealing furnace is hoisted out of the furnace before the top of the workpiece is immersed in the coolant, and then the lower part of the hoisted workpiece is immersed first. The workpiece is unevenly heated, which affects the quenching quality. The usual measure is to control the upper and lower parts of the furnace to different temperatures to compensate. Since the 1920s, the brass tube pit vacuum annealing furnace has used a pit furnace for loading and unloading workpieces from the bottom of the furnace, which is heated by electric heating elements. All are built above the ground and can move left and right on the ground track