GB1367687A - Method of hardening the surface of workpieces made of iron and steel - Google Patents
Method of hardening the surface of workpieces made of iron and steelInfo
- Publication number
- GB1367687A GB1367687A GB4126471A GB4126471A GB1367687A GB 1367687 A GB1367687 A GB 1367687A GB 4126471 A GB4126471 A GB 4126471A GB 4126471 A GB4126471 A GB 4126471A GB 1367687 A GB1367687 A GB 1367687A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- treatment
- nitriding
- glow discharge
- iron
- 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
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
- C23C8/36—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 using ionised gases, e.g. ionitriding
- C23C8/38—Treatment 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
1367687 Nitriding by glow discharge ELEKTROPHYSIKALISCHE ANSTALT BERNHARD BERGHAUS 3 Sept 1971 [8 Sept 1970] 41264/71 Heading C7U Iron or steel are surface hardened by glow discharge in an atmosphere of treatment gas, particularly nitrogen or a titanium compound, in at least two stages, treatment of part of the surface being suppressed by shielding during at least one stage, so that a hardening element is diffused to differing depths. As particularly applied to a valve plunger Fig. 1, the body is treated by glow discharge nitriding in a first stage with the regions 3, 4, 5, 6 protected by shields 26, 27, 28, 29 which may be spaced up to 0À5 mm. from the surface, the treatment being effected at above 500‹ C and particularly for 18 hours at 530‹ C. The outer sleeve 26 is then removed and treatment continued for 6 hours at 490‹ C. In a modified second stage the ring 28 shielding region 4 may also be removed, while the inner sleeve 27 may be partially withdrawn to allow nitriding of that part of the inner surface adjacent to the closed end and thereby minimize distortion. Further improvement may also be obtained by shortening the outer sleeve 26 during the first stage.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1336670 | 1970-09-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1367687A true GB1367687A (en) | 1974-09-18 |
Family
ID=4391800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4126471A Expired GB1367687A (en) | 1970-09-08 | 1971-09-03 | Method of hardening the surface of workpieces made of iron and steel |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT320707B (en) |
BE (1) | BE772299A (en) |
CA (1) | CA945048A (en) |
CH (1) | CH545859A (en) |
DE (1) | DE2144238C3 (en) |
FR (1) | FR2106363B1 (en) |
GB (1) | GB1367687A (en) |
LU (1) | LU63856A1 (en) |
NL (1) | NL7112384A (en) |
SE (1) | SE370553B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2153488A (en) * | 1984-01-23 | 1985-08-21 | Nippon Piston Ring Co Ltd | Nitrided steel piston ring |
GB2196993A (en) * | 1986-10-29 | 1988-05-11 | Electricity Council | Method and apparatus for thermochemical treatment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868878A (en) * | 1993-08-27 | 1999-02-09 | Hughes Electronics Corporation | Heat treatment by plasma electron heating and solid/gas jet cooling |
EP0985739B1 (en) * | 1998-09-10 | 2003-05-14 | MMS Marine Motor Service | Method of hardening piston crowns and piston crown |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL163085B (en) * | 1950-08-03 | Siemens Ag | SWITCHING DEVICE FOR TRANSMISSION OF MESSAGES ON A TRANSMISSION ROAD CONSISTING OF SEVERAL PARALLEL CONNECTED LINES. | |
US3536602A (en) * | 1967-01-27 | 1970-10-27 | Gen Electric | Glow inhibiting method for glow discharge apparatus |
-
1970
- 1970-09-08 CH CH545859D patent/CH545859A/xx not_active IP Right Cessation
-
1971
- 1971-09-03 DE DE19712144238 patent/DE2144238C3/en not_active Expired
- 1971-09-03 GB GB4126471A patent/GB1367687A/en not_active Expired
- 1971-09-06 FR FR7132122A patent/FR2106363B1/fr not_active Expired
- 1971-09-07 BE BE772299A patent/BE772299A/en unknown
- 1971-09-07 AT AT777071A patent/AT320707B/en not_active IP Right Cessation
- 1971-09-07 LU LU63856D patent/LU63856A1/xx unknown
- 1971-09-07 SE SE1131271A patent/SE370553B/xx unknown
- 1971-09-07 CA CA122,206A patent/CA945048A/en not_active Expired
- 1971-09-08 NL NL7112384A patent/NL7112384A/xx unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2153488A (en) * | 1984-01-23 | 1985-08-21 | Nippon Piston Ring Co Ltd | Nitrided steel piston ring |
GB2196993A (en) * | 1986-10-29 | 1988-05-11 | Electricity Council | Method and apparatus for thermochemical treatment |
US4900371A (en) * | 1986-10-29 | 1990-02-13 | The Electricity Council | Method and apparatus for thermochemical treatment |
GB2196993B (en) * | 1986-10-29 | 1991-04-03 | Electricity Council | Method and apparatus for thermochemical treatment |
Also Published As
Publication number | Publication date |
---|---|
AT320707B (en) | 1975-02-25 |
DE2144238C3 (en) | 1975-09-04 |
NL7112384A (en) | 1972-03-10 |
FR2106363A1 (en) | 1972-05-05 |
SE370553B (en) | 1974-10-21 |
LU63856A1 (en) | 1973-03-09 |
FR2106363B1 (en) | 1974-03-29 |
BE772299A (en) | 1972-03-16 |
CH545859A (en) | 1974-02-15 |
DE2144238A1 (en) | 1972-03-16 |
DE2144238B2 (en) | 1975-01-16 |
CA945048A (en) | 1974-04-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |