GB843857A - Friction elements - Google Patents
Friction elementsInfo
- Publication number
- GB843857A GB843857A GB24721/57A GB2472157A GB843857A GB 843857 A GB843857 A GB 843857A GB 24721/57 A GB24721/57 A GB 24721/57A GB 2472157 A GB2472157 A GB 2472157A GB 843857 A GB843857 A GB 843857A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graphite
- mesh
- ferrous
- copper base
- friction
- 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
-
- 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—Compositions of linings; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
Abstract
A powdered friction element for brakes and clutches has a matrix of sintered powdered ferrous or copper base material and dispersed therein unfused coarse ceramic and coarse graphite of particle size -20 to +60 mesh (Tyler), the amount of ceramic being 5-15% by weight of the composition and of graphite 5-20%. Friction modifiers such as lead or (325 mesh) intramatrix graphite, friction stabilizers such as molybdenum disulphide intramitrix (220 mesh) abrasives such as alumina or silica, and a binder tin, may also be added. Ceramics may include mullite and other silicates such as andalusite, dumortierite, kyanite (calcined) sillimenite, topaz natural or synthetic, or oxides such as alumina and silica. The graphite is preferably either natural flake or ground nodular synthetic type. In making the element, the mixed powders are first compressed at 15-20 tons per square inch (ferrous base) or 11-15 tons per square inch (copper base), then sintered at respectively about 180 DEG F. under 250 p.s.i. (ferrous base), or about 1500 DEG F. under 150 p.s.i. (copper base) for one hour.ALSO:A powdered friction element for brakes and clutches has a matrix of sintered powdered ferrous or copper base material and dispersed therein unfused coarse ceramic and coarse graphite of particle size -20 to +60 mesh (Tyler), the amount of ceramic being 5-15% by weight of the composition and of graphite 5-20%. Friction modifiers such as lead or (325 mesh) intramatrix graphite; friction stabilisers such as molybdenum disulphide; intramatrix (220 mesh) abrasives such as alumina or silica; and a binder tin, may also be added. Ceramics may include mullite and other silicates such as andalusite, dumortierite, kyanite (calcined) sillimanite, topaz natural or synthetic; or oxides such as alumina and silica. The graphite is preferably either natural flake or ground modular synthetic type. In making the element, the mixed powders are first compressed at 15-20 tons per sq. inch (ferrous) base or 11-15 tons per sq. inch (copper base), then sintered at respectively about 1800 DEG F. under 250 p.s.i. (ferrous base), or about 1500 DEG F. under 150 p.s.i. (copper base) for one hour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US843857XA | 1956-08-08 | 1956-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843857A true GB843857A (en) | 1960-08-10 |
Family
ID=22184631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24721/57A Expired GB843857A (en) | 1956-08-08 | 1957-08-06 | Friction elements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB843857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275554A (en) * | 2021-03-31 | 2021-08-20 | 西安铁路信号有限责任公司 | Copper-based powder metallurgy clutch friction plate for point switch and manufacturing method thereof |
-
1957
- 1957-08-06 GB GB24721/57A patent/GB843857A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275554A (en) * | 2021-03-31 | 2021-08-20 | 西安铁路信号有限责任公司 | Copper-based powder metallurgy clutch friction plate for point switch and manufacturing method thereof |
| CN113275554B (en) * | 2021-03-31 | 2022-10-25 | 西安铁路信号有限责任公司 | Copper-based powder metallurgy clutch friction plate for point switch and manufacturing method thereof |
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