Rapid air cooling apparatus for heat treatment

PURPOSE: A rapid water cooling apparatus for a heat treatment product formed like a hollow pipe is provided to improve the cooling efficiency and to execute the uniform quick cooling by spraying air uniformly. CONSTITUTION: A rapid water cooling apparatus for a heat treatment product formed like a hollow pipe is composed of an air supply unit, an outer spray unit(20), an inner blowing unit(30), a lifting unit(40), and a controller. The air supply unit supplies high pressure air. The outer spray unit is installed outside a heat treatment object(w) to spray the air to the outer surface of the heat treatment object. The inner blowing unit is composed of a blower(32) blowing the air, a duct(34) blowing the air to the inner surface of the heat treatment object, and a blowing angle control unit(36) controlling the blowing angle of the air. The lifting unit lifts the air supply unit at the upside of the heat treatment object. The controller controls the spraying rate and time of the air sprayed from the spray unit.