TW428046B - Compound- layer-free vacuum nitriding process - Google Patents
Compound- layer-free vacuum nitriding processInfo
- Publication number
- TW428046B TW428046B TW088101449A TW88101449A TW428046B TW 428046 B TW428046 B TW 428046B TW 088101449 A TW088101449 A TW 088101449A TW 88101449 A TW88101449 A TW 88101449A TW 428046 B TW428046 B TW 428046B
- Authority
- TW
- Taiwan
- Prior art keywords
- nitriding
- work piece
- compound
- chamber
- layer
- Prior art date
Links
- 238000005121 nitriding Methods 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 2
- 239000001272 nitrous oxide Substances 0.000 abstract 2
- 238000002360 preparation method Methods 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000002161 passivation Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
Landscapes
- Formation Of Insulating Films (AREA)
Abstract
This invention describes a compound-layer-free vacuum nitriding process which includes following procedures, preparation, pumping down to vacuum, heating up, depassivation and nitriding. The work piece is placed into a nitriding furnace equipped with a closed chamber in the preparation step. After the chamber is pumped to obtain vacuum state, nitrogen is introduced for heating up step. And then nitrous oxide gas is added to remove passivation film on the surface of the work piece due to oxidation in the depassivation step. At last, an atmosphere containing ammonia, nitrous oxide and nitrogen is introduced into the chamber for the nitriding process. The total flow rate for the atmosphere is below 10 LPM/m<SP>2</SP> (liter per minute per square meter). And thus there is no compound layer produced on the work piece. This facilitates the subsequent hard film composite covering process and also increases the nitriding rate, saves energy, and improves practicability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW088101449A TW428046B (en) | 1999-01-30 | 1999-01-30 | Compound- layer-free vacuum nitriding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW088101449A TW428046B (en) | 1999-01-30 | 1999-01-30 | Compound- layer-free vacuum nitriding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW428046B true TW428046B (en) | 2001-04-01 |
Family
ID=21639578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW088101449A TW428046B (en) | 1999-01-30 | 1999-01-30 | Compound- layer-free vacuum nitriding process |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TW428046B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2790841C1 (en) * | 2022-07-22 | 2023-02-28 | Общество с ограниченной ответственностью научно-производственная фирма "Термомет-М" | Method for surface treatment of heat-resistant stainless steel |
-
1999
- 1999-01-30 TW TW088101449A patent/TW428046B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2790841C1 (en) * | 2022-07-22 | 2023-02-28 | Общество с ограниченной ответственностью научно-производственная фирма "Термомет-М" | Method for surface treatment of heat-resistant stainless steel |
| RU2796338C1 (en) * | 2023-02-07 | 2023-05-22 | Общество с ограниченной ответственностью научно-производственная фирма "Термомет-М" | Method for surface treatment of heat-resistant stainless steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GD4A | Issue of patent certificate for granted invention patent | ||
| MK4A | Expiration of patent term of an invention patent |