Claims
- 1. A continuous treatment furnace for brazing and gas soft-nitriding iron parts, comprising:
- a furnace body including:
- a brazing chamber for brazing said iron parts in a protecting atmosphere substantially comprising a controlled gas for brazing;
- a furnace cooling chamber, provided subsequent to said brazing chamber, for gradually cooling said iron parts in a protecting atmosphere substantially comprising said controlled gas; and
- a gas soft-nitriding chamber, provided subsequent to said furnace cooling chamber, for gas soft-nitriding said iron parts in a gas soft-nitriding atmosphere substantially comprising said controlled gas and an ammonia gas;
- a protecting gas supply line branched to feed said controlled gas to said brazing chamber, said furnace cooling chamber, and said gas soft-nitriding chamber;
- an ammonia gas supply line connected to feed said ammonia gas to said gas soft-nitriding chamber;
- said chambers being provided with partition walls therebetween;
- each said partition wall being provided with an opening therein to permit communication between said chambers; and
- a shielding steel curtain being disposed so as to cover each said opening while permitting said iron parts to be passed therethrough.
- 2. A continuous treatment furnace according to claim 1, further comprising:
- a conveyor extending along said furnace body so as to continuously carry said iron parts through said brazing chamber, said furnace cooling chamber and said gas soft-nitriding chamber.
- 3. A continuous treatment furnace according to claim 2, wherein:
- said shielding steel curtains have lower ends thereof in sliding contact with an upper surface of said conveyor.
- 4. A continuous treatment furnace according to claim 1, wherein:
- said gas soft-nitriding chamber is provided with an agitator means.
- 5. A continuous treatment furnace according to claim 1, wherein:
- said furnace body includes a front wall provided with an inlet port adjacent said brazing chamber and further includes a rear wall provided with an outlet port adjacent said gas soft-nitriding chamber; and
- shielding steel curtains are disposed so as to cover said inlet port and said outlet port while permitting said iron parts to be passed therethrough.
Priority Claims (2)
Number |
Date |
Country |
Kind |
53-84680 |
Jul 1978 |
JPX |
|
53-85384 |
Jul 1978 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 113,649 filed Jan. 21, 1980, abandoned which is in turn a division of application Ser. No. 56,922 filed July 12, 1979, abandoned.
US Referenced Citations (10)
Divisions (1)
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Number |
Date |
Country |
Parent |
56922 |
Jul 1979 |
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Continuations (1)
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Number |
Date |
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Parent |
113649 |
Jan 1980 |
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