Gas nitriding furnace for carrying out multi-section heat treatment on cutter

The utility model discloses a gas nitriding furnace for carrying out multi-section heat treatment on a cutter. Relating to the field of nitriding furnaces, the device comprises a shell I, a sucking pump is fixedly mounted at the top of the shell I; a frame is fixedly mounted at the top of the shell I; an air inlet pipe is fixedly mounted on the frame; a connecting pipe I and a connecting pipe II are fixedly mounted at the bottom of the air inlet pipe; a shell II and a shell III are fixedly mounted on the outer side wall of the shell I; a heating device is arranged in a connecting area of the shell II and the shell I; one end of the heating device is arranged in the shell I, a mounting hole II is formed in a connecting area of the shell III and the shell I, a spray head is fixedly mounted on the inner side wall of the mounting hole II, and an inner cavity is formed in the shell I. The gas nitriding furnace for carrying out multi-section heat treatment on the cutter is convenient to useand diverse in function a