EP0590107A1 - Sinterreibwerkstoff fur reibschlüssige elemente, sowie verfahren zum herstellen derselben - Google Patents
Sinterreibwerkstoff fur reibschlüssige elemente, sowie verfahren zum herstellen derselbenInfo
- Publication number
- EP0590107A1 EP0590107A1 EP93903892A EP93903892A EP0590107A1 EP 0590107 A1 EP0590107 A1 EP 0590107A1 EP 93903892 A EP93903892 A EP 93903892A EP 93903892 A EP93903892 A EP 93903892A EP 0590107 A1 EP0590107 A1 EP 0590107A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sintered
- material according
- friction
- friction material
- graphite
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title 1
- 239000002783 friction material Substances 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 239000011574 phosphorus Substances 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 239000011593 sulfur Substances 0.000 claims abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910021382 natural graphite Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 235000013339 cereals Nutrition 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000005445 natural material Substances 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000005275 alloying Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 231100000206 health hazard Toxicity 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- -1 alkaline earth metal sulfates Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
Definitions
- the invention relates to a sintered friction material in powder form with an iron matrix and a proportion of graphite for the production of frictional elements, in particular of synchronization bodies.
- Such sintered friction materials are used for frictional elements, which are part of clutches, brakes or synchronization devices, for example.
- a main area of application is synchro rings, from which high load limits are required.
- a friction element for oil running is known from DD-PS 89 727, which is intended for single-disc and multi-plate clutches, brakes or synchronous rings.
- This known friction element is manufactured using powder metallurgy. It receives iron powder metallic additives of nickel, copper and lead as well as graphite, each in powder form. The use of lead results in a considerable health hazard both in the manufacture and in the use of the friction element.
- the friction element made from this material tends to show strong adhesion, which manifests itself in a non-uniform torque build-up and seizures.
- DE-GM 73 42 680 describes a synchronizer ring made of sintered steel, on which a thin molybdenum layer is applied in the area of the friction surface.
- Molybdenum spray material is an expensive material. As a rule, it must be brought to the required surface dimensions on the synchronizing ring by grinding.
- the applied layer has a relatively large surface roughness, so that the effective friction surface is comparatively small. In particular, this can lead to strong heating in the friction surface, which can result in the synchronizer ring and synchronizer body seizing and the molybdenum layer becoming detached.
- the object of the invention is to create a sintered friction material which can withstand high loads with a sufficient coefficient of friction, in particular with regard to surface pressure and friction speed.
- This sintered material is said to be able to be used inexpensively in the manufacture of frictionally locking elements, in particular of synchronizing bodies, such as synchronizing rings.
- the recyclability of the sintered friction material and the frictional elements produced using it should be improved.
- the powdery material contains a proportion of graphite from 15 to 30 percent by volume and an alloy content of 0.3 to 6 percent by mass of phosphorus, boron and / or sulfur.
- the friction and wear behavior of the material is optimized by the proportion of graphite of at least 15 percent by volume.
- the alloy proportions especially if they are not only dissolved in iron, but also as phosphides, borides or sulfides of iron, greatly reduce the tendency of the iron matrix to weld or eat. By not using lead, the health hazard in the manufacture of the known material is eliminated.
- a relatively coarse-grained graphite powder or a graphite powder mixture with a large particle size distribution range is preferably used.
- the graphite is natural graphite, with which the desired grain size spectrum is achieved. This takes place above all if, in a further embodiment of the invention, the average grain size of natural graphite is 20 to 120 ⁇ m.
- the sintered friction material according to the invention can be designed in such a way that it contains a proportion of 5 to 15 volume percent of non-metallic substances which are constituted from metal oxides, metal carbides and / or alkaline earth metal sulfates. It has proven to be advantageous if these substances are used not as a chemical, but preferably as a natural substance in the form of mineral flour.
- the invention also relates to a method for producing a friction lining from a sintered friction material described above.
- the powdery starting components are mixed intimately, pressed at a pressure of 300 to 800 MPa and sintered at a temperature of 950 to 1150 ° C. in a protective gas atmosphere.
- the atmosphere can be inert or reduced.
- the invention relates to a frictional element, in particular a synchronizer ring, with a friction lining made of the sintered friction material described above.
- the carrier for the friction lining consists of sintered steel.
- the joining problem according to the invention can be solved either by pressing and sintering the friction lining and carrier material together or by sintering the friction lining material onto a steel beam.
- the friction lining is a component of the gradient structure of a sintered steel synchronizer ring. It must be emphasized that this type of joining is particularly cost-effective.
- the friction material has the level of friction required for use in synchronizers.
- the axial wear is less than 0.5 mm under normal load after 100,000 switching operations.
- Recyclability can be illustrated using the example of a synchronizer ring with a friction lining according to the invention, since the synchronizer ring has the same material base as the construction materials of the transmission.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Operated Clutches (AREA)
- Powder Metallurgy (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4203321 | 1992-02-06 | ||
DE19924203321 DE4203321A1 (de) | 1992-02-06 | 1992-02-06 | Sinterreibwerkstoff fuer reibschluessige elemente, insbesondere von synchronisierungskoerpern, sowie verfahren zum herstellen von sinterreibbelag und reibschluessigem element |
PCT/EP1993/000216 WO1993016207A1 (de) | 1992-02-06 | 1993-01-30 | Sinterreibwerkstoff fur reibschlüssige elemente, sowie verfahren zum herstellen derselben |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0590107A1 true EP0590107A1 (de) | 1994-04-06 |
Family
ID=6451033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93903892A Withdrawn EP0590107A1 (de) | 1992-02-06 | 1993-01-30 | Sinterreibwerkstoff fur reibschlüssige elemente, sowie verfahren zum herstellen derselben |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0590107A1 (de) |
DE (1) | DE4203321A1 (de) |
WO (1) | WO1993016207A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4400431A1 (de) * | 1994-01-10 | 1995-07-13 | Krebsoege Gmbh Sintermetall | Sinterreibwerkstoff für reibschlüssiges Element |
CN105798311B (zh) * | 2016-03-21 | 2018-07-10 | 北京科技大学 | 一种高导热铁基粉末冶金高速列车刹车片的制备方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH352352A (de) * | 1955-12-31 | 1961-02-28 | Cosid Werke Veb | Verfahren zur Herstellung eines Eisen-Graphit-Verbundwerkstoffes |
DE1126623B (de) * | 1959-01-09 | 1962-03-29 | Jurid Werke Gmbh | Verfahren fuer die Aufbereitung graphithaltiger Pulvermischungen zur Herstellung von gesinterten Reibwerkstoffen |
CA1162005A (en) * | 1980-12-19 | 1984-02-14 | Herbert W. Lloyd | Sintered powder metal friction material |
-
1992
- 1992-02-06 DE DE19924203321 patent/DE4203321A1/de not_active Withdrawn
-
1993
- 1993-01-30 WO PCT/EP1993/000216 patent/WO1993016207A1/de not_active Application Discontinuation
- 1993-01-30 EP EP93903892A patent/EP0590107A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9316207A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4203321A1 (de) | 1993-08-12 |
WO1993016207A1 (de) | 1993-08-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2427665B1 (de) | Gleitlagermaterial | |
CN102202816B (zh) | 粒状材料的冶金组合物、自润滑烧结产品以及获得自润滑烧结产品的方法 | |
DE102016111122A1 (de) | Gesinterter Reibwerkstoff für einen Reibbelag | |
AT410580B (de) | Gleitlager und verfahren zu seiner herstellung | |
DE19817037A1 (de) | Synchronisierring | |
EP1097313B1 (de) | Reibbelag, insbesondere für bremsen und kupplungen, und verfahren zur herstellung eines reibbelages | |
WO1995018877A2 (de) | Sinterreibwerkstoff für reibschlüssige elemente sowie reibschlüssiges element | |
DE1280516B (de) | Verfahren zur Erzielung eines hohen Zinngehalts in einem Verbundmetallstreifen fuer Gleitlager | |
AT411765B (de) | Durch sintern hergestelltes reibmaterial | |
DE29804229U1 (de) | Gesinterter Bremsbelag | |
EP0590107A1 (de) | Sinterreibwerkstoff fur reibschlüssige elemente, sowie verfahren zum herstellen derselben | |
EP0716247B1 (de) | Synchronring mit Reibfläche aus Sinterbronze | |
AT505425B1 (de) | Trockenlaufreibbelag | |
EP1530689B1 (de) | In einem medium laufende reibschicht | |
DE4111207C2 (de) | Elastischer Metallreibbelag und Verfahren zu seiner Herstellung | |
AT522255B1 (de) | Reibbelag | |
EP1141576B1 (de) | Verfahren zur verbindung eines sinterkörpers mit einem metallischen tragerelement | |
DE102007025239B4 (de) | Verfahren zur Herstellung eines Gleitlagers | |
JPS6164838A (ja) | 高密度銅系焼結合金 | |
EP0798482B1 (de) | Reibsystem | |
DE1208082B (de) | Gesinterter Reibwerkstoff auf Eisenbasis | |
EP0719956B1 (de) | Verfahren zur Herstellung von Verbundwerkstoffen sowie verfahrensgemässer Verbundwerkstoff | |
DE1189814B (de) | Gesinterter Reibkoerper aus Eisenpulver und Graphitteilchen | |
DE1179060B (de) | Reibkoerper fuer Bremsen und Kupplungen | |
WO2022199989A1 (de) | Reibbelagzusammensetzung für kupplungen von windkraftanlagen und reibbelag |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19940129 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ECKHARDT, MARION Inventor name: REBSCH, HEINZ Inventor name: SCHNEIDER, LOTHAR Inventor name: GONIA, DETLEF |
|
17Q | First examination report despatched |
Effective date: 19970704 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19980115 |