CN1040666A - A kind of powder metallurgy friction material that contains mineral powder - Google Patents
A kind of powder metallurgy friction material that contains mineral powder Download PDFInfo
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- CN1040666A CN1040666A CN 88106269 CN88106269A CN1040666A CN 1040666 A CN1040666 A CN 1040666A CN 88106269 CN88106269 CN 88106269 CN 88106269 A CN88106269 A CN 88106269A CN 1040666 A CN1040666 A CN 1040666A
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- powder
- friction material
- molybdenite
- weight percentage
- powder metallurgy
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- Powder Metallurgy (AREA)
- Braking Arrangements (AREA)
Abstract
A kind of iron powder mixes with mineral powder, with the new-type friction material that powder metallurgy process is made, can be used in the braking device as automobile brake sheet and so on.It has overcome asbestos resin friction material short shortcoming in working life, has the intensity height, frictional behaviour is good, advantages such as good thermal stability.Its wear resistance can improve 1～2 times than common powder metallurgy friction material, and cost reduces by 50～65%.
Description
The present invention relates to the friction material that a kind of iron powder made from powder metallurgy process mixes with mineral powder, it is used for the braking device as automobile brake sheet and so on.
Automobile needs braking continually in the process of moving, therefore requires automobile brake sheet to have higher intensity, hardness and excellent friction performance.Brake block in the past adopts the asbestos resin material to make mostly, but because " heat fade phenomenon " often causes the rapid decline of brake torque, even hot tearing and collapse.In addition its to the receptance of oil, water, not only working life short, and easily cause brake failure.In addition, the volatile material of the carcinogenesis of asbestos generation also influences the health of the person.And common powder metallurgy brake flat such as U. S. Patent 3019514; The clear 58-147481 of Japan Patent; B. P. GB-207378IA; Russian Patent 379665; European patent EP 0055205 A2 etc.Though can overcome the shortcoming of asbestos resin material, and be widely used in the aircraft braking device,, influence its popularization on braking automobile because cost is too high.In order to improve above-mentioned frictional behaviour, have the glass fibre of employing to replace asbestos, but serviceability temperature is lower, wear rate is higher with the increase friction factor.As U. S. Patent 4411851; The clear 59-25867 of Japan Patent; B. P. GB2083062A etc.There are the carbon fiber of employing, composite fiber and substitute fibre to replace asbestos, but cost an arm and a leg.As U. S. Patent 8794509; The clear 59-54644 of Japan Patent; " semimetal friction material " that adopt Steel Fibre arranged, but easy-to-rust, aggravation wearing and tearing and pyroconductivity height produce defectives such as low frequency noise, as U. S. Patent 3434998; The clear 58-34885 of Japan Patent etc.
The purpose of this invention is to provide a class intensity height, frictional behaviour is good, good thermal stability, and cheap iron powder mixes with mineral powder and brake pad material repressed, sintering.It had both overcome the shortcoming on the asbestos resin material usability, than general powder metallurgy friction material low price, was beneficial to extensive use on vehicle again.
In order to achieve the above object, the present invention with iron powder and copper powder as matrix with strengthen the matrix composition.Graphite lubricate, continuous metal are brought into play its good thermal conductivity mutually.And bear mechanical stress, with the ferrous manganese ore of certain particle size, hardness, molybdenite powder as wear-resisting particle be distributed in metal mutually in to guarantee required frictional behaviour.The invention provides the sintered friction material that a class is made up of ferrous manganese ore, molybdenite, graphite and iron powder.Ferrous manganese ore and molybdenite in this type of material, have been added.The another kind of sintered friction material of then being made up of copper, graphite, lead oxide, aluminium oxide, molybdenite and iron powder that provides in this type of material, has added molybdenite and lead oxide.
The composition that first kind material adopts is expressed as follows by weight percentage:
Ferrous manganese ore: 31～50
Graphite: 10～15
Molybdenite: 2～5
Iron: surplus
The composition that the second class material adopts is expressed as follows by weight percentage:
Copper: 3～5
Graphite: 8～13
Molybdenite: 1～4
Lead oxide: 2～4
Aluminium oxide: 1～4
Iron: surplus
The ore that is added in the material of the present invention should clean, dries, pulverizes and sieve, the granularity of ferrous manganese ore, molybdenite is generally at one 150 orders (153 microns), the other materials powder also all will sieve, granularity is generally at 50～80 orders, and weighs according to their weight percentages in material.The various powder that prepare are added kerosene mixed 5～6 hours in the V-type blenders, then with mixture at 5～6 tons/centimetre
2Under the pressure, compression moulding in pressing mold, the material base that suppresses is packed in the sintering box under 1020～1040 ℃ temperature, places in the sintering furnace sintering 2～3 hours under cracked ammonium (or coal gas) atmosphere, obtains meeting the product of performance requirement.
The average friction coefficient of such material (when I=2kgcm, S, P=0.98 MPa.V=3.35～13.40m/s) is 0.46～0.28; Wear rate is 0.23 * 10
-12～0.38 * 10
-12m
3/ J; Density is 4.8～5.2g/cm
3; Hardness HB40～65kgf/mm
2; Compressive strength 20～30kgf/mm
2; Tensile strength 5～7kgf/mm
2Compare with common powder metallurgy automobile braking material, its wear resistance improves 1～2 times, and cost of material has reduced by 50～65%.
For first kind material, its optimum formula is Fe-31Mn-Fe powder-10C-2 molybdenite powder by weight percentage.Optimal processing parameter mixed 6 hours for doing, and pressing pressure is 6 tons/centimetre
2, 1030 ± 5 ℃ of sintering temperatures, sintering time is 2.5 hours.
For the second class material, its optimum formula is Fe-13C-3Cu-2Al by weight percentage
2O
3-2PbO-2 molybdenite powder, optimal processing parameter mixed 6 hours for doing, and pressing pressure is 6 tons/centimetre
2, 1025 ± 5 ℃ of sintering temperatures, sintering time is 2 hours.
Claims (6)
1, a kind ofly makes, be used for the friction material of brake device for car, it is characterized in that it being to make by metallic dust, non-metal powder and mineral powder with powder metallurgy process.
2, friction material as claimed in claim 1, the weight percentage that it is characterized in that the various compositions of first kind material is a ferrous manganese ore: 31～50, graphite: 10～15, molybdenite: 2～5, iron: surplus; The weight percentage of the various compositions of the second class material is: copper: 3～5, graphite 8～13, molybdenite: 1～4, lead oxide: 2～4, lead oxide: 2～4, aluminium oxide: 1～4, iron: surplus.
3, friction material as claimed in claim 1 is characterized in that sintering process parameter is 1020～1040 ℃ of temperature, holding time 2～3 hours.
4, friction material as claimed in claim 1 is characterized in that the pressing process parameter is: powder is dried, and do time 5～6 hours, the pressure of cold moudling are 5～6 tons/centimetre
2
5, friction material as claimed in claim 1, the granularity that it is characterized in that mineral powder is at one 150 orders (153 microns), and the granularity of other powder is the 50-80 order.
6, friction material as claimed in claim 1 is characterized in that optimum formula, and weight percentage one class of each composition is Fe-31 Mn-Fe breeze-10C-2 molybdenite powder; Another kind of is Fe-13C-3 Cu-2Al
2O
3-2PbO-2 brightness molybdenum powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106269 CN1040666A (en) | 1988-08-24 | 1988-08-24 | A kind of powder metallurgy friction material that contains mineral powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106269 CN1040666A (en) | 1988-08-24 | 1988-08-24 | A kind of powder metallurgy friction material that contains mineral powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1040666A true CN1040666A (en) | 1990-03-21 |
Family
ID=4834174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88106269 Pending CN1040666A (en) | 1988-08-24 | 1988-08-24 | A kind of powder metallurgy friction material that contains mineral powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040666A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350013C (en) * | 2006-03-10 | 2007-11-21 | 江阴职业技术学院 | Hight-performance semi-metal brake sheet material without asbestos |
| CN100384960C (en) * | 2006-05-22 | 2008-04-30 | 孙忠义 | Brake block friction material granulating manufacturing process |
| CN100453582C (en) * | 2006-05-12 | 2009-01-21 | 上海培盟材料科技有限公司 | Friction materials for high-speed train braking and method for preparing same |
-
1988
- 1988-08-24 CN CN 88106269 patent/CN1040666A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350013C (en) * | 2006-03-10 | 2007-11-21 | 江阴职业技术学院 | Hight-performance semi-metal brake sheet material without asbestos |
| CN100453582C (en) * | 2006-05-12 | 2009-01-21 | 上海培盟材料科技有限公司 | Friction materials for high-speed train braking and method for preparing same |
| CN100384960C (en) * | 2006-05-22 | 2008-04-30 | 孙忠义 | Brake block friction material granulating manufacturing process |
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| PB01 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |