The quenching furnace consists of several parts, including the furnace body, furnace door, heating element, ventilation mechanism, and control system. The furnace body is welded from steel sections and plates, and the inner wall of the furnace lining is connected to the furnace shell as a whole using stainless steel plates. The furnace body and the interlayer of the furnace liner are filled with aluminum silicate refractory fibers for insulation. The furnace door is designed at the lower part of the furnace body, which means that the workpiece enters or exits from below. The lower opening of this furnace body is opened, and the opening and closing action of the furnace door is achieved through mechanical transmission, using electric motors, gearboxes, sprockets, chains, tracks, etc. The heating element adopts a high resistance alloy resistance strip, and the hooks are arranged on both sides of the inner container, insulated from the inner container. The ventilation fan consists of a blower and a guide plate. The blower motor is electrically interlocked with the heating element, and the heating element can only be powered on when the blower is turned on. This ensures that the heating element can work in the ventilation cycle. There is a water tank located at the bottom of the furnace body, which allows workpieces to enter the tank for quenching treatment in a short period of time. The control part adopts thyristors, digital displays, etc. for temperature control and alarm. The electric furnace is equipped with limit switches on the furnace door opening and closing mechanism and the loading lifting mechanism. These switches are connected to the power supply of the control cabinet. When the workpiece rises to the point, the furnace door opening and closing power supply is turned on and contacts the heating element power supply. When the furnace door is opened, cut off the power supply to the heating element and connect the power supply to the lifting mechanism to lower the workpiece for water quenching.