GB1213190A - Process and apparatus for internally nitriding tubes - Google Patents
Process and apparatus for internally nitriding tubesInfo
- Publication number
- GB1213190A GB1213190A GB6079568A GB6079568A GB1213190A GB 1213190 A GB1213190 A GB 1213190A GB 6079568 A GB6079568 A GB 6079568A GB 6079568 A GB6079568 A GB 6079568A GB 1213190 A GB1213190 A GB 1213190A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitriding
- tubes
- tube
- nitrided
- activator
- 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
- 238000005121 nitriding Methods 0.000 title abstract 4
- 238000000034 method Methods 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- 239000012190 activator Substances 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 2
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 abstract 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010494 dissociation reaction Methods 0.000 abstract 1
- 230000005593 dissociations Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- -1 organic acid phosphate Chemical class 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 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
1,213,190. Nitriding tubes. GENERAL ELECTRIC CO. Dec. 20, 1968 [Jan. 15, 1968], No. 60795/68. Heading C7U. The internal surfaces of ferrous alloy tubes are nitrided by contacting the said surfaces with an activator and flowing ammonia having a degree of dissociation between 15% and 50% through the tube at a temperature from 850‹F. to 1200‹F., the direction of ammonia flow being reversed at intervals of not greater than 30 minutes. Inert gas may be flowed through the tube while heating to and cooling from the nitriding temperature. The nitriding gas may be flowed through the tube between manifolds at either end thereof and each manifold may contain an amount of decomposable activator such as polyvinyl chloride, organic acid phosphate, ammonium chloride, ammonium bifluoride, sulphamic acid or mixtures thereof preferably in amounts up to 3 grams per square foot of surface to be nitrided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69799068A | 1968-01-15 | 1968-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1213190A true GB1213190A (en) | 1970-11-18 |
Family
ID=24803453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6079568A Expired GB1213190A (en) | 1968-01-15 | 1968-12-20 | Process and apparatus for internally nitriding tubes |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS512417B1 (en) |
| BE (1) | BE726799A (en) |
| CH (1) | CH527278A (en) |
| ES (1) | ES362288A1 (en) |
| FR (1) | FR2000259A1 (en) |
| GB (1) | GB1213190A (en) |
| NL (1) | NL6818765A (en) |
| SE (1) | SE345699B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2214196A (en) * | 1988-01-14 | 1989-08-31 | Skf Gmbh | Case-hardening |
| CN114540747A (en) * | 2022-01-25 | 2022-05-27 | 北京科技大学 | Preparation device and application method of inner surface gradient reinforced steel pipe |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63132076U (en) * | 1987-02-20 | 1988-08-30 | ||
| NL1039971C2 (en) * | 2012-12-24 | 2014-06-25 | Bosch Gmbh Robert | Heat treatment process in a manufacturing method of a ring set for a drive belt. |
| JP6576232B2 (en) * | 2015-12-10 | 2019-09-18 | 曙ブレーキ工業株式会社 | Soft-nitriding steel member and manufacturing method thereof, pressure plate, and brake pad |
-
1968
- 1968-12-20 GB GB6079568A patent/GB1213190A/en not_active Expired
- 1968-12-27 NL NL6818765A patent/NL6818765A/xx unknown
- 1968-12-28 JP JP9596568A patent/JPS512417B1/ja active Pending
-
1969
- 1969-01-09 ES ES362288A patent/ES362288A1/en not_active Expired
- 1969-01-13 BE BE726799D patent/BE726799A/xx unknown
- 1969-01-14 SE SE42769A patent/SE345699B/xx unknown
- 1969-01-15 FR FR6900526A patent/FR2000259A1/fr not_active Withdrawn
- 1969-01-15 CH CH50969A patent/CH527278A/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2214196A (en) * | 1988-01-14 | 1989-08-31 | Skf Gmbh | Case-hardening |
| GB2214196B (en) * | 1988-01-14 | 1992-06-03 | Skf Gmbh | Process for the case hardening of rolling-bearing elements of low-alloy steel containing nickel |
| CN114540747A (en) * | 2022-01-25 | 2022-05-27 | 北京科技大学 | Preparation device and application method of inner surface gradient reinforced steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| SE345699B (en) | 1972-06-05 |
| ES362288A1 (en) | 1970-12-01 |
| DE1901607B2 (en) | 1975-09-25 |
| NL6818765A (en) | 1969-07-17 |
| CH527278A (en) | 1972-08-31 |
| DE1901607A1 (en) | 1969-07-31 |
| FR2000259A1 (en) | 1969-09-05 |
| JPS512417B1 (en) | 1976-01-26 |
| BE726799A (en) | 1969-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |