FR2063287A5 - Gaseous nitriding of steels - Google Patents
Gaseous nitriding of steelsInfo
- Publication number
- FR2063287A5 FR2063287A5 FR6930780A FR6930780A FR2063287A5 FR 2063287 A5 FR2063287 A5 FR 2063287A5 FR 6930780 A FR6930780 A FR 6930780A FR 6930780 A FR6930780 A FR 6930780A FR 2063287 A5 FR2063287 A5 FR 2063287A5
- Authority
- FR
- France
- Prior art keywords
- layer
- ferrite
- article
- temp
- fatigue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 2
- 239000010959 steel Substances 0.000 title abstract 2
- 238000005121 nitriding Methods 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 239000010410 layer Substances 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229910001567 cementite Inorganic materials 0.000 abstract 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000007792 gaseous phase Substances 0.000 abstract 1
- 229910000704 hexaferrum Inorganic materials 0.000 abstract 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 150000004767 nitrides Chemical class 0.000 abstract 1
- 239000012071 phase Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Steel and similar alloys are surface nitrided in the gaseous phase to form a surface layer >5 mu thick of epsilon-iron nitride and a N-rich carbonitride phase based on cementite, the layer being homogeneous and continuous giving a negative reaction test with 5% ammonia cal copper chloride. Beneath this layer is a diffusion zone comprising a solid soln. of C and N in ferrite. The process is effected at a temp. above the critical transformation temp. and the article is thermally treated such as to prevent the formation of martensite in the core or produce fatigue strain in the quenched ferrite. The treatment improves the fatigue, abrasion and corrosion resistance of the article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6930780A FR2063287A5 (en) | 1969-09-10 | 1969-09-10 | Gaseous nitriding of steels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6930780A FR2063287A5 (en) | 1969-09-10 | 1969-09-10 | Gaseous nitriding of steels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2063287A5 true FR2063287A5 (en) | 1971-07-09 |
Family
ID=9039882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR6930780A Expired FR2063287A5 (en) | 1969-09-10 | 1969-09-10 | Gaseous nitriding of steels |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2063287A5 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2162654A1 (en) * | 1971-12-10 | 1973-07-20 | Barkas Werke Veb | Accelerated gas nitriding process - for (ferrous) metals using carbon monoxide in ammonical nitriding gas |
| US4003764A (en) * | 1973-05-17 | 1977-01-18 | Firma J. Aichelin | Preparation of an ε-carbon nitride surface layer on ferrous metal parts |
| US4163680A (en) * | 1975-11-21 | 1979-08-07 | Syrchikov Sergei A | Process for carbonitriding steel and cast iron articles |
| FR3148607A1 (en) * | 2023-05-12 | 2024-11-15 | Safran Transmission Systems | Nitriding treatment process without combination layer of a steel part |
-
1969
- 1969-09-10 FR FR6930780A patent/FR2063287A5/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2162654A1 (en) * | 1971-12-10 | 1973-07-20 | Barkas Werke Veb | Accelerated gas nitriding process - for (ferrous) metals using carbon monoxide in ammonical nitriding gas |
| US4003764A (en) * | 1973-05-17 | 1977-01-18 | Firma J. Aichelin | Preparation of an ε-carbon nitride surface layer on ferrous metal parts |
| US4163680A (en) * | 1975-11-21 | 1979-08-07 | Syrchikov Sergei A | Process for carbonitriding steel and cast iron articles |
| FR3148607A1 (en) * | 2023-05-12 | 2024-11-15 | Safran Transmission Systems | Nitriding treatment process without combination layer of a steel part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1431747A (en) | Process for carburizing high alloy steels | |
| Bell | Gaseous and plasma nitrocarburizing | |
| US3117041A (en) | Heat treated steel article | |
| US4366008A (en) | Method for hardening steel | |
| FR2063287A5 (en) | Gaseous nitriding of steels | |
| Michalski et al. | Controlled gas nitriding of 40HM and 38HMJ steel grades with the formation of nitrided cases with and without the surface compound layer, composed of iron nitrides | |
| GB1034157A (en) | Case hardening ferrous articles | |
| DE50008409D1 (en) | Method and use of a device for nitrocarburizing ferrous materials | |
| Krauss | The relationship of microstructure to fracture morphology and toughness of hardened hypereutectoid steels | |
| GB1439072A (en) | Thermal treatment of steel | |
| SU395520A1 (en) | ||
| JPS5719320A (en) | Heat treatment of spheroidal graphite cast iron | |
| JPS572826A (en) | Quenching method for steel | |
| US1736921A (en) | Case nitrification of steel | |
| SU403785A1 (en) | ||
| GB1499711A (en) | Nitriding | |
| Cherry | Austenitic Carbonitriding | |
| Biró et al. | Nitrocarburising of low alloyed case hardening steels applying three different temperatures | |
| IT1118132B (en) | Gas phase soft nitriding metal workpieces - using gas mixt. contg. relatively low amt. of ammonia | |
| Gee | Wear Resistance Through Thermal Treatment. Criteria for the Choice of Process | |
| Bell | Ferritic thermochemical treatments | |
| JPS57192241A (en) | Abrasion resistant ductile cast iron parts and manufacture thereof | |
| Grigor'yev et al. | Wear Resistance of Steels After Chemical--Thermal Treatment and Ion Nitro-Carburizing With Direct Quenching | |
| VOROSHNIN et al. | Comparative wear resistance of diffusion layers(Rolling and sliding friction wear of steels after surface hardening) | |
| Spies et al. | Influence of Nitriding on the Transformation Behaviour of Steel X 38 CrMoV 51 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |