CH351992A - Process for the surface treatment of friction disks, in particular clutch plates - Google Patents
Process for the surface treatment of friction disks, in particular clutch platesInfo
- Publication number
- CH351992A CH351992A CH351992DA CH351992A CH 351992 A CH351992 A CH 351992A CH 351992D A CH351992D A CH 351992DA CH 351992 A CH351992 A CH 351992A
- Authority
- CH
- Switzerland
- Prior art keywords
- surface treatment
- friction disks
- clutch plates
- particular clutch
- friction
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000004381 surface treatment Methods 0.000 title claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 235000010344 sodium nitrate Nutrition 0.000 claims description 2
- 239000004317 sodium nitrate Substances 0.000 claims description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 241000446313 Lamella Species 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 238000005256 carbonitriding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 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
-
- 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
- C23C8/60—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 solids, e.g. powders, pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Operated Clutches (AREA)
Description
Verfahren zur Oberflächenbehandlung von Reibscheiben, insbesondere Kupplungslamellen Lamellen aus gehärtetem Stahl werden als Kupp lungselemente vorzugsweise wegen ihres geringen Verschleisses und ihrer billigen Herstellung verwendet.
Ein Nachteil der Stahllamellen mit blanker, metal lischer Reibfläche ist ihr über die Gebrauchszeit ver änderlicher Reibwert, welcher während der Einlauf zeit der Lamellen um bis zu 50% geringer werden kann. Da die Lamellenkupplungen in vielen Fällen ein bestimmtes, begrenztes Drehmoment übertragen sollen, so ist dieser Abfall des Reibwertes uner wünscht.
Durch einen vorausgehenden Einlaufvorgang kann der Reibwert nicht genügend schnell auf den Betriebs wert abgesenkt werden, da hierzu mehrere tausend Vollastschaltungen notwendig sind.
Auch durch Läppen der Berührungsflächen kann nur eine teilweise Annäherung des Reibwertes an den des Gebrauchszustandes erreicht werden. Oberflächen behandlungen durch Phosphatieren, Dampfanlassen u. ä. führen ebenfalls nicht zu einer befriedigenden Lösung, ganz abgesehen davon, dass diese Behand lungen mehr oder weniger die Herstellungskosten der Lamelle erhöhen.
Nach der Erfindung wird die Oberfläche bei Reib scheiben aus Stahl, insbesondere Kupplungslamellen, zweckmässig unter Anwendung von Stickstoff abge benden Härtemitteln, nach ihrem mechanischen Fer- tigbearbeiten gehärtet. Auf diese Weise kann erreicht werden, dass der Reibwert z. B. von so gehärteten neuen Stahllamellen demjenigen von gut eingelaufenen Lamellen angeglichen ist und während des Betriebes keine nennenswerten Änderungen mehr erfährt. Be- sonders geeignet für den vorliegenden Zweck sind das Härten in einem Cyanidbad und das Karbonitrierver- fahren.
In Ergänzung dieser chemischen und härtemässi gen Beeinflussungen der Oberfläche z. B. von La mellen kann ferner das Abschrecken der Lamellen in einem Salzbad, beispielsweise in einer Schmelze von Natrium- und Kalisalpeter vorgenommen werden. Hierdurch wird in der Oberfläche der Lamellen eine Oxydschicht erzeugt, die ohne Kostenaufwand eine zusätzliche Erhöhung der Belastbarkeit der Lamellen ergibt.
Process for the surface treatment of friction disks, in particular clutch plates plates made of hardened steel are preferably used as coupling elements because of their low wear and tear and their cheap production.
A disadvantage of steel lamellas with a bare, metallic friction surface is their coefficient of friction, which changes over the period of use and which can be reduced by up to 50% during the lamella's run-in period. Since the multi-plate clutches are intended to transmit a certain, limited torque in many cases, this drop in the coefficient of friction is undesirable.
A running-in process beforehand cannot reduce the coefficient of friction to the operating value quickly enough, since several thousand full-load shifts are necessary for this.
Even by lapping the contact surfaces, only a partial approximation of the coefficient of friction to that of the state of use can be achieved. Surface treatments by phosphating, steaming, etc. Ä. Also do not lead to a satisfactory solution, quite apart from the fact that these treatments more or less increase the production costs of the lamella.
According to the invention, the surface of friction disks made of steel, in particular clutch plates, is expediently hardened using hardening agents which emit nitrogen after they have been mechanically finished. In this way it can be achieved that the coefficient of friction z. B. of new steel plates hardened in this way is matched to that of well-worn-in plates and no longer experiences any significant changes during operation. Hardening in a cyanide bath and the carbonitriding process are particularly suitable for the present purpose.
In addition to this chemical and häremässi conditions influencing the surface z. B. of lamellae, the quenching of the lamellae can also be carried out in a salt bath, for example in a melt of sodium and potassium nitrate. As a result, an oxide layer is produced in the surface of the lamellae, which results in an additional increase in the load-bearing capacity of the lamellae at no cost.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE351992X | 1956-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH351992A true CH351992A (en) | 1961-02-15 |
Family
ID=6272356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH351992D CH351992A (en) | 1956-04-28 | 1957-03-09 | Process for the surface treatment of friction disks, in particular clutch plates |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH351992A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685869A (en) * | 1984-10-04 | 1987-08-11 | Toyota Jidosha Kabushiki Kaisha | Device for supporting nozzle vanes of a turbocharger |
-
1957
- 1957-03-09 CH CH351992D patent/CH351992A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685869A (en) * | 1984-10-04 | 1987-08-11 | Toyota Jidosha Kabushiki Kaisha | Device for supporting nozzle vanes of a turbocharger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1223200B (en) | Disc coupling for shafts with a metallic washer | |
| DE2354565A1 (en) | BOLTS FOR A STEEL CHAIN | |
| AT408478B (en) | REIBRING | |
| DE68914601T2 (en) | Gears with great strength. | |
| DE69500233T2 (en) | Timing belts and their manufacturing processes | |
| DE102004041862A1 (en) | roller chain | |
| CH351992A (en) | Process for the surface treatment of friction disks, in particular clutch plates | |
| DE2264275A1 (en) | Frictional contact set - comprising one metal member and one plastic bonded member with short-life, running-in surface layer | |
| AT200599B (en) | Process for the production of hardened friction disks from structural steel, in particular clutch disks | |
| DE1012946B (en) | Surface treatment of friction disks | |
| DE68915719T2 (en) | Method of manufacturing bushings for caterpillar tractors. | |
| DE19510302A1 (en) | Surface treated piston rod | |
| DE19728919A1 (en) | Gear change gear | |
| DE2450267A1 (en) | SPRING COMPONENT, SUCH AS A DISC SPRING IN PARTICULAR | |
| DE102013222364B4 (en) | Friction clutch and plate with partially raised segment joints | |
| DE1101898B (en) | Process for increasing the fatigue strength of springs made of steel | |
| AT227039B (en) | ||
| DE102008047724A1 (en) | Sliding disc in a sprag clutch | |
| DE1160698B (en) | Friction disc for friction clutches, in particular for multi-plate clutches, and method for manufacturing the friction disc | |
| DE1103690B (en) | Disk springs for clutches, in particular for motor vehicle clutches, and process for their manufacture | |
| DE1758208A1 (en) | Process for the heat treatment of steel | |
| CH237239A (en) | Process for the production of a machine element with a friction surface. | |
| DE899926C (en) | Circulating power transmission medium for clocks and similar fine mechanical devices | |
| DE102008060761A1 (en) | roller bearing | |
| DE758753C (en) | Vehicle brake, especially for free-wheeling brake hubs of bicycles |