Rapid cooling heat treatment furnace

The utility model relates to the technical field of heat treatment furnaces, in particular to a rapid cooling heat treatment furnace which comprises an outer cylinder, an inner cylinder is fixed on the inner wall of the top of the outer cylinder, a vacuum cavity is formed between the inner cylinder and the outer cylinder, and a furnace cover is installed on the top of the outer cylinder. A vacuum pump is installed at the top of the furnace cover, a four-way pipe and a communicating pipe are inserted into the output end and the input end of the vacuum pump correspondingly, one end of the communicating pipe is inserted into the top of the furnace cover, a round hole is formed in the top of the furnace cover, and a vent valve is fixed to the inner wall of the round hole; after high-temperature treatment of materials is carried out, inert gas needs to be filled for rapid air cooling, the air-cooled materials need to be cooled to the indoor temperature, cooling can be finished, in the cooling process, the cooling