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AssigneesMitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo Heat Treating Company, Ltd.
InventorsNobuo Nishioka, Tadayoshi Juge, Yoshiaki Shimizu, Keishichi Namba, Hiroshi Shimura, Fumitaka Abukawa, Hitoshi Goi, Kazuyoshi Fujita, Yuichi Takasu
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In a gas carburizing method, a hydrocarbon gas and air are supplied to a furnace main body that carburizes a workpiece. The hydrocarbon gas and air react with one another in the furnace main body to generate an atmospheric gas having a carburizing property. The flow rate of the hydrocarbon gas to be supplied is maintained at a predetermined value. The flow rate of air to be supplied can be altered by adjusting the carbon potential of the atmospheric gas. A gas carburizing apparatus includes a furnace main body and load and unload chambers provided on two ends of the furnace main body. The load and unload chambers have combustion units. The combustion units communicate with the interiors of the load and unload chambers and burn a hydrocarbon gas. The combustion gas of the hydrocarbon gas is supplied to the load and unload chambers.
A gas carburizing method for filling a furnace main body with an atmospheric gas having a carburizing property and carburizing a workpiece in said furnace main body in the absence of a separate furnace for generating a gaseous mixture adapted to adjust the carbon potential of the atmospheric gas, said process comprising:
A gas carburizing apparatus having a furnace main body adapted to be filled with an atmospheric gas having a carburizing property, a load chamber provided to an entrance side of said furnace main body, and an unload chamber provided to an exit side of said furnace main body, said apparatus comprising:
Dependencies are inferred from the claim text.