| 摘要 |
An atmospheric gas generator for heat treatment includes a heat treatment furnace for performing heat treatment of a metal material; an alcohol supply device for supplying alcohol to the heat treatment furnace; a nitroge n gas supply device for supplying nitrogen gas to the heat treatment furnace; and a nozzle having an end protruding into the heat treatment furnace. An atmospheric gas is generated by introducing the alcohol supplied by the alcohol supply device a nd the nitrogen gas supplied by the nitrogen gas supply device into the heat treatment furnace via the nozzle. The nozzle includes an alcohol introduction pipe, a nitrogen gas introduction pipe, and a venturi section provided in connection with a t ip of the alcohol introduction pipe and with a tip of the nitrogen gas introduction pipe.
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