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US 5,273,585 AGranted
Heat-treating apparatus
AssigneeMazda Motor Corporation
InventorsHideo Shoga, Yoshikazu Nagai, Masayuki Suzawa, Hiroshi Nagahama, Ko Yamaoka, Teiji Ogawa, Yoshitugu Kamiya
Life of this patent
Estimating the term…
Abstract
A heat-treating apparatus comprises zones such as a carburizing zone, a cooling zone, and a nitriding zone, those zones are formed in series by partitioning a continuous passage through doors, and conveyance means for conveying an object along the passage. The cooling zone comprises a forced-feed cooling means for cooling the object by blowing cooling gas.
Claims15
A heat-treating apparatus comprising:
- a first heat-treating zone for heat treating an object in controlled atmosphere;
- a cooling zone for cooling the object, which finished being heat-treated in said first heat-treating zone, by cooling gas;
- and
- a second-treating zone for heat-treating the object, which finished being cooled in said cooling zone, in controlled atmosphere, said heat-treating zones and said cooling zone communicate through a door.
1 more element
A heat-treating apparatus comprising:
- a carburizing zone for heating and carburizing an object, a cooling zone for cooling the heated and carburized object, and a nitriding zone for heating and nitriding the object, said zones are formed in series by partitioning a continuous passage through openable and closable doors;
- conveyor means for conveying an object along said continuous passage;
- and
- said cooling zone comprises a forced-feed gas cooling means for cooling the object by blowing cooling gas to the object said forced-feed cooling means comprising a cooling gas blowing duct for blowing a cooling gas to the object;
- and a cooling gas collecting duct for collecting the cooling gas blown to the object.
2 more elements
A heat-treating apparatus comprising:
- a first heat-treating zone for heat-treating an object in controlled atmosphere;
- a cooling zone for cooling said object, which finished being heat-treated in said first heat-treating zone, by cooling gas;
- and
- a second heat-treating zone for heat-treating the object, which finished being cooled in said cooling zone in controlled atmosphere, said heat-treating zones and said cooling zone communicate through a door, said cooling zone comprises pressure regulating means for regulating pressure inside said cooling zone so that the pressure is at a desired value.
1 more element
A heat-treating apparatus comprising:
- a heating zone for heating an object in carburizing gas atmosphere;
- a nitriding zone for nitriding the object, which finished being heated in said heating zone, in nitriding gas atmosphere, said nitriding zone comprises nitriding gas inlet means for making nitriding gas flow into said nitriding zone, carburizing gas inlet means for making carburizing gas flow into said nitriding zone, and exhausting means for exhausing residual ammonia in said nitriding zone to an outside;
- a communicating part for communicating said heating zone with said nitriding zone so that the object can be conveyed therebetween;
- and
- a door for opening and closing said communicating part.
2 more elements
Dependencies are inferred from the claim text.