ES2083663T3 - PROCEDURE FOR TEMPLE OF WORK PIECES IN A PLASMA DISCHARGE BY IMPULSES. - Google Patents
PROCEDURE FOR TEMPLE OF WORK PIECES IN A PLASMA DISCHARGE BY IMPULSES.Info
- Publication number
- ES2083663T3 ES2083663T3 ES92121129T ES92121129T ES2083663T3 ES 2083663 T3 ES2083663 T3 ES 2083663T3 ES 92121129 T ES92121129 T ES 92121129T ES 92121129 T ES92121129 T ES 92121129T ES 2083663 T3 ES2083663 T3 ES 2083663T3
- Authority
- ES
- Spain
- Prior art keywords
- plasma discharge
- duration
- carbon
- carburisation
- vacuo
- 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 - Lifetime
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
Abstract
Workpieces made of steel are hardened by carburising the surface and subsequent quenching. Carburisation is carried out by means of a plasma discharge in vacuo in the presence of gaseous hydrocarbons at voltages between 200 and 2000 volts, preferably between 300 and 1000 volts, and preferably with the admixture of argon. The plasma is generated by electrodes operated in vacuo, of which the cathode serves as the workpiece holder and is operated in a pulsed manner. So as to achieve, in the process, a uniform hardness distribution even for irregularly shaped workpieces and to reduce the carbon mass flow, a) carburisation is carried out at an overall pressure between 14 and 30 mbar (1400 to 3000 Pa), b) a pulse duration of between 110 and 10,000 mu s (microseconds) is chosen, c) an internal duration of between 30 and 10,000 mu s is chosen and d) the mean power supplied to the plasma discharge is decreased, after completion of the start-up phase, by reducing the pulse duration and/or extending the interval duration, either continuously or in a stepwise manner, in such a way that the carbon content at said surface, without interruption of the pulsed operation, does not exceed at any time the saturation limit of the material for carbon in the austenitic domain. o
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4201325 | 1992-01-20 | ||
| DE4238993A DE4238993C1 (en) | 1992-01-20 | 1992-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2083663T3 true ES2083663T3 (en) | 1996-04-16 |
Family
ID=25911085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES92121129T Expired - Lifetime ES2083663T3 (en) | 1992-01-20 | 1992-12-11 | PROCEDURE FOR TEMPLE OF WORK PIECES IN A PLASMA DISCHARGE BY IMPULSES. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0552460B1 (en) |
| JP (1) | JPH0657404A (en) |
| AT (1) | ATE134222T1 (en) |
| DE (2) | DE4238993C1 (en) |
| ES (1) | ES2083663T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05128675A (en) * | 1991-11-05 | 1993-05-25 | Sony Corp | Automatic cassette changer |
| US5868878A (en) * | 1993-08-27 | 1999-02-09 | Hughes Electronics Corporation | Heat treatment by plasma electron heating and solid/gas jet cooling |
| EP0758410A1 (en) * | 1994-04-26 | 1997-02-19 | Igenwert Gmbh | Process for incorporating material into the surface of a solid body and altering it, in particular the surface of a material |
| DE4427902C1 (en) * | 1994-08-06 | 1995-03-30 | Leybold Durferrit Gmbh | Method for carburising components made from carburisable materials by means of a plasma discharge operated in a pulsed fashion |
| DE102004053935B4 (en) * | 2004-11-09 | 2015-04-09 | Schaeffler Technologies AG & Co. KG | Process for the heat treatment of a component made of a thermosetting heat-resistant steel and a component made of a thermosetting, heat-resistant steel |
| DE102006040814A1 (en) * | 2006-08-31 | 2008-03-06 | Schaeffler Kg | Method for producing a highly hardenable rolling bearing component |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE601847C (en) * | 1933-04-01 | 1934-08-25 | Siemens Schuckertwerke Akt Ges | Method for introducing a substance into a metal |
| NL163085B (en) * | 1950-08-03 | Siemens Ag | SWITCHING DEVICE FOR TRANSMISSION OF MESSAGES ON A TRANSMISSION ROAD CONSISTING OF SEVERAL PARALLEL CONNECTED LINES. | |
| FR2501727A1 (en) * | 1981-03-13 | 1982-09-17 | Vide Traitement | PROCESS FOR THE THERMOCHEMICAL TREATMENT OF METALS BY ION BOMBING |
| GB8625912D0 (en) * | 1986-10-29 | 1986-12-03 | Electricity Council | Thermochemical treatment |
| DE3714283C1 (en) * | 1987-04-29 | 1988-11-24 | Ipsen Ind Internat Gmbh | Process for gas carburizing steel |
| US4853046A (en) * | 1987-09-04 | 1989-08-01 | Surface Combustion, Inc. | Ion carburizing |
-
1992
- 1992-11-19 DE DE4238993A patent/DE4238993C1/de not_active Expired - Fee Related
- 1992-12-11 DE DE59205356T patent/DE59205356D1/en not_active Expired - Fee Related
- 1992-12-11 AT AT92121129T patent/ATE134222T1/en not_active IP Right Cessation
- 1992-12-11 EP EP92121129A patent/EP0552460B1/en not_active Expired - Lifetime
- 1992-12-11 ES ES92121129T patent/ES2083663T3/en not_active Expired - Lifetime
-
1993
- 1993-01-19 JP JP5006391A patent/JPH0657404A/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ATE134222T1 (en) | 1996-02-15 |
| DE4238993C1 (en) | 1993-07-01 |
| JPH0657404A (en) | 1994-03-01 |
| EP0552460A1 (en) | 1993-07-28 |
| EP0552460B1 (en) | 1996-02-14 |
| DE59205356D1 (en) | 1996-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
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