CONTINUOUS CARBURIZATION FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a continuous carburization furnace capable of controlling a carburization zone and a diffusion zone to appropriate atmosphere and appropriately setting processing time of an object to be processed in each zone.SOLUTION: A furnace body 11 of a continuous carburization furnace 10 has: a first furnace body part 21 including a carburization zone; a second furnace body part 22 which includes a diffusion zone and is provided at height different from that of the first furnace body part 21; and a third furnace body part 23 which connects a transportation terminal end of the first furnace body part 21 with a transportation starting end of the second furnace body part 22. A transportation device 12 which sequentially transports an object to be processed W to the carburization zone and the diffusion zone in the furnace body 11 has: a first transporting part 31 which transports the object to be processed W in the first furnace body part 21; and a second transporting part 32 which transports the object to be processed W in the second furnace body part 22 separately, and a gas supply device 14 which supplies gas for creating atmosphere in the furnace body 11 has: a first gas supply part 41 which supplies gas to the first furnace body part 21; and a second gas supply part 42 which supplies gas to the second furnace body part 22 separately.