CN101591743A - Retarder brake material - Google Patents
Retarder brake material Download PDFInfo
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- CN101591743A CN101591743A CNA2008101133344A CN200810113334A CN101591743A CN 101591743 A CN101591743 A CN 101591743A CN A2008101133344 A CNA2008101133344 A CN A2008101133344A CN 200810113334 A CN200810113334 A CN 200810113334A CN 101591743 A CN101591743 A CN 101591743A
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- metal
- retarder
- matrix composite
- component
- friction
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Abstract
The present invention relates to a kind of material that is used for retarder brake, comprise metal matrix composite, anti-attrition component and increase the mill component.By this material, not only can reduce the frictional noise of retarder greatly, can also improve its structure properties simultaneously.
Description
Technical field
The present invention relates to the retarder technology, specifically a kind of retarder brake material.
Background technology
Retarder is the speed control device of China railways marshalling yard widely used control skating vehicle speed, the braking rail of using on the present domestic retarder is the rail of 60Kg/m, drive the retarder brake pincers by hydro-cylinder or reservoir during work, make the braking rail that is fixed on the caliper clamp the wheel of vehicle, reach the purpose of control car speed by the sliding friction between wheel-tyre side and braking rail, the principle of work of this retarder can (Communication Signals Inst.of Scientific Research Inst. Ministry of Railways (CN compiles referring to " 7501 car retarder ", China Railway Press, 80 years versions).This operation process is accompanied by and makes us insufferable ear-piercing high frequency noise, and this noise is injuring the resident living of on-the-spot worker and station periphery for a long time always.
Generating noise mainly is to be caused by the friction that is used for arresting retarder generation.During braking, the negative slope of the frictional force between the contact object and surface temperature, surface treatment, elasticity of compression rate, tensile strength, void content, visco-elasticity, frictional coefficient---temperature relation curve, frictional coefficient---relating to parameters such as length velocity relation song, wherein frictional coefficient---the velocity curve of friction materials is the important parameter that produces the frictional vibration noise.
Summary of the invention
At the problems referred to above, the present invention proposes a kind of novel retarder brake material, comprise metal matrix composite, anti-attrition component and increase the mill component.Its high frequency noise in can the cancel job process can keep the function and the performance of original retarder again simultaneously.
Embodiment
Because the braking rail of retarder is main braking primary structure member, does not have in the open under any lubricating condition again and works, and belongs to heavily loaded metal to-metal contact type.Classify from traditional friction materials, the selection range of its brake material should be based on composite material.Because its antithesis friction member is the wheel that must be protected, therefore definitely can not select with the wheel friction after can the infringement wheel material.From stressed characteristics, this composite material, want to bear the caliper ingress surging force and with the wheel friction process that rotates in the repeated stress that produced, so this composite material also will have good noise reduction when guaranteeing required physical strength.Frictional coefficient between itself and wheel must rationally if frictional coefficient is too big, then can produce too high resistance when cooperating existing caliper holding force, can not satisfy the use needs of marshalling yard; If frictional coefficient is too small, the requirement that can not reach the retarder brake characteristic again.
By the actual analysis to retarder utilization process, noise mainly is that high frequency pollutes (about 1-15KHZ), and transforming target is purpose to eliminate high frequency noise, satisfies the functional requirement of retarder self simultaneously.
Different damped condition conditions is to the requirement difference of Properties of Friction Materials.At first material should have metastable friction co-efficient value (0.2-0.6), and is less to its influence when ambient conditions (as retro-speed, pressure, temperature, surrounding medium etc.) changes, and dynamic and static frictional coefficient is more or less the same.Because of the size of frictional coefficient numerical value has directly reflected braking ability.For the working condition of flap, braking ability requires also should be controlled at a certain scope.The stability of frictional coefficient is very important, when the damped condition condition changing especially when retro-speed is not high, pressure is big, when braking frequently causes frictional surface temperature to raise, frictional coefficient generally can reduce, and this phenomenon is called " heat fading ", and this is that retarder is not wished the phenomenon that takes place.Should keep certain stationary value at the temperature range coefficient of interal friction that uses.
Retarder brake material also should have higher wear resistance, but can not damage wheel, and also answer free from extraneous odour the noise and do not have other pollutions except that being difficult for producing in the drag friction process, its economy will be got well, raw material sources are abundant, price is cheap, manufacturing process wants simple.
Will satisfy premises requirement fully is difficult by single-material, has only the matrix material of utilization or composite structure just can reach.Can be summarized as follows according to the performance requriements of retarder brake rail braking characteristics material:
1) enough physical strengths is arranged, bear huge damping force;
2) material not only requires the wear resistance height, and its frictional coefficient will be stablized;
3) thermal conductivity is good, and thermal capacity is big, can dispel the heat.
4) can adapt to open-air open-air Working environment;
5) low price.
In order to satisfy above-mentioned requirements, the present invention adopts the brake material of a kind of advanced composite material as snubber, it is a matrix with metal-powder (iron powder or copper powder), adds a certain amount of mill component (metal oxide, carbide, asbestos, silicon oxide etc.) and anti-attrition component (graphite, the MoS of increasing
2, sulfide, low melting point metal etc.), through mixing, compression moulding and pressure sintering form.Compare with traditional organic asbestos friction material, it is big that it has a bearing stress, advantages such as thermal conductivity is good, stable friction factor.
Matrix material of the present invention mainly is made up of following three part materials:
(1) matrix component
The intensity of matrix material of the present invention, wear resistance, thermostability depend primarily on structure, physics and the chemical property of matrix.Metallic matrix is used for bearing the outer heat of friction that produces when braking of carrying and distribute.Metallic matrix mainly contains two types of copper base and iron-baseds.Copper base wear resistance material is to be basal component with Cu-Sn (the Sn proportion is 5%-10%) alloy and Cu-Pb (the Pb proportion is 8%-12%) alloy.In order to improve thermotolerance and hot strength, can add other alloying element in right amount, as Ni, Fe, Zn, Ti, Mn, Mo, Sb etc., to strengthen matrix.The wear resistance material thermal conductivity of copper base, high thermotolerance and hot strength, hardness and thermostability, better economy; In order to improve its frictional behaviour, often add the Sn of 1.5%-5% and greater than 5% graphite, thereby obtain a kind of ferrite-pearlite tissue.Because the friction facing of iron-based has similar lattice with mating plate (cast iron or steel brake drum, dish), easily produce " adhesion ", therefore need to add a certain amount of alloying element to strengthen matrix; As add a certain amount of Mn, Al, Co, Cr etc. and all can reduce " adhesion " degree, promptly reduce maximum friction co-efficient value to keep friction stability and to improve wear resistance.Different alloying elements is different to the influence of iron-based wear resistance material frictional behaviour.
(2) anti-attrition component
For resistance to marring and the wear resistance that improves matrix material, the anti-attrition component that adds has usually: low melting point metal (Pb, Sb, Bi), non-metal solid lubricant (graphite, MoS
2, WS
2, CuS), metal phosphide (phosphide of Cu, Fe, Ni, Co), talcum powder, BN etc.In general, along with add-on increases, wear resistance can improve, but frictional coefficient can descend; The physical strength of material also can descend, so add-on is too much unsuitable.Can determine corresponding optimal addn according to material, the working condition of matrix.Noticeable, though have graphite lubricate in iron of laminate structure, also influence the tissue of matrix.Because of in pressurization burning process, graphite will be melted in the iron and strengthen matrix, along with increasing in a large number of graphite, will cause the variation (ferrite reduces, and the chap of cementite shape is big) of tissue.MoS in addition
2Content unsuitable too much, MoS during because of high temperature
2Easily be reduced to MoS by oxysomeization
3, becoming abrasive particle and lose lubrication, this on the contrary can accelerated wear test.
(3) increase the mill component
In order to eliminate the unfavorable factor that the anti-attrition component is brought, guarantee that enough frictional coefficient satisfy the requirement of damped condition, need to add an amount of mill component that increases, to increase frictional coefficient, abrade friction surface but friction component should not become abrasive particle and increase abrasion.Therefore the globule size, shape and the hardness that increase the mill material will suit, and it is high that its fusing point and heat decomposition temperature are wanted, and (from the room temperature to the sintering temperature) do not undergo phase transition in wide temperature range, and the protective atmosphere Fails To Respond during with other components and sintering.Commonly used increase grinding agent high-melting point metal powder (Fe, Cr, M powder), metal oxide (Fe are arranged
2O
3, Al
2O
3, Cr
2O
3, MgO, TiO
2, ZrO etc.), nitride (TiN, ZrN etc.), carbide (TiC, ZrC), boride and asbestos, SiO
2, SiC etc.Increasing selecting for use of material of mill should determine its kind and consumption (generally in the 0.5%-20% scope) according to working condition (temperature, load, lubricant medium) and service requirements, for satisfying its over-all properties, often adopts multiplely to increase grinding agent and carry out ageing treatment.
By adopting above-mentioned brake material, the frictional noise of retarder reduces greatly, and its structure properties also makes moderate progress simultaneously.
Claims (9)
1. a material that is used for retarder brake comprises metal matrix composite, anti-attrition component and increases the mill component.
2. material as claimed in claim 1, wherein metal matrix composite is the copper base.
3. material as claimed in claim 2 wherein comprises one or more the combination among Ni, Fe, Zn, Ti, Mn, Mo, the Sb in the metal matrix composite.
4. material as claimed in claim 2, wherein metal matrix composite comprises the Sn of 1.5%-5% and greater than 5% graphite.
5. material as claimed in claim 1, wherein metal matrix composite is an iron-based.
6. material as claimed in claim 5 wherein comprises one or more the combination among Mn, Al, Co, the Cr in the metal matrix composite.
7. material as claimed in claim 1, wherein anti-attrition component are low melting point metal, non-metal solid lubricant, metal phosphide, talcum powder or BN.
8. material as claimed in claim 1, wherein increasing the mill component is metal-powder, metal oxide, nitride, carbide, boride, asbestos, SiO
2Or SiC.
9. material as claimed in claim 1, wherein increasing the mill components contents is 0.5%-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101133344A CN101591743A (en) | 2008-05-28 | 2008-05-28 | Retarder brake material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101133344A CN101591743A (en) | 2008-05-28 | 2008-05-28 | Retarder brake material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101591743A true CN101591743A (en) | 2009-12-02 |
Family
ID=41406620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101133344A Pending CN101591743A (en) | 2008-05-28 | 2008-05-28 | Retarder brake material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101591743A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676871A (en) * | 2011-03-09 | 2012-09-19 | 北京古特莱航空科技发展有限公司 | Sintered friction material for brake of wind power generation equipment and its preparation method |
| CN103898410A (en) * | 2014-04-16 | 2014-07-02 | 临沂市金立机械有限公司 | Metal modified gasoline engine link |
| CN104532052A (en) * | 2014-11-20 | 2015-04-22 | 张哲� | Heavy-load high-speed powder metallurgy brake material and preparation technology thereof |
| CN105063414A (en) * | 2015-08-12 | 2015-11-18 | 苏州卫生职业技术学院 | Alloy material for cutters and preparation method thereof |
| CN106191518A (en) * | 2016-08-09 | 2016-12-07 | 苏州金仓合金新材料有限公司 | A kind of carborundum antimony stannum zinc-copper composite for high ferro locomotive and preparation method |
| CN106435252A (en) * | 2016-12-14 | 2017-02-22 | 苏州金仓合金新材料有限公司 | Silicon-carbide-reinforced stibium-stannum-copper alloy bar and preparation method thereof |
| CN106756213A (en) * | 2016-11-11 | 2017-05-31 | 中南大学 | A kind of copper-base material with high abrasive resistance and preparation method thereof |
| CN108384983A (en) * | 2018-03-06 | 2018-08-10 | 浙江灿根智能科技有限公司 | A kind of high-strength copper based alloy material |
| CN110650812A (en) * | 2017-04-07 | 2020-01-03 | 日本制铁株式会社 | Sintered friction material |
| CN112059170A (en) * | 2020-08-24 | 2020-12-11 | 北京科技大学 | High-performance powder metallurgy brake pad and preparation method thereof |
| CN112593112A (en) * | 2020-10-23 | 2021-04-02 | 淮阴工学院 | Multiphase friction-reducing resistance-increasing copper alloy and preparation method thereof |
-
2008
- 2008-05-28 CN CNA2008101133344A patent/CN101591743A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676871A (en) * | 2011-03-09 | 2012-09-19 | 北京古特莱航空科技发展有限公司 | Sintered friction material for brake of wind power generation equipment and its preparation method |
| CN103898410A (en) * | 2014-04-16 | 2014-07-02 | 临沂市金立机械有限公司 | Metal modified gasoline engine link |
| CN103898410B (en) * | 2014-04-16 | 2015-09-09 | 临沂市金立机械有限公司 | A kind of metal-modified petrol motor connecting rod |
| CN104532052A (en) * | 2014-11-20 | 2015-04-22 | 张哲� | Heavy-load high-speed powder metallurgy brake material and preparation technology thereof |
| CN105063414A (en) * | 2015-08-12 | 2015-11-18 | 苏州卫生职业技术学院 | Alloy material for cutters and preparation method thereof |
| CN106191518B (en) * | 2016-08-09 | 2018-05-18 | 苏州金仓合金新材料有限公司 | A kind of carborundum antimony tin zinc-copper composite material and preparation method for high ferro locomotive |
| CN106191518A (en) * | 2016-08-09 | 2016-12-07 | 苏州金仓合金新材料有限公司 | A kind of carborundum antimony stannum zinc-copper composite for high ferro locomotive and preparation method |
| CN106756213A (en) * | 2016-11-11 | 2017-05-31 | 中南大学 | A kind of copper-base material with high abrasive resistance and preparation method thereof |
| CN106435252A (en) * | 2016-12-14 | 2017-02-22 | 苏州金仓合金新材料有限公司 | Silicon-carbide-reinforced stibium-stannum-copper alloy bar and preparation method thereof |
| WO2018107847A1 (en) * | 2016-12-14 | 2018-06-21 | 苏州金仓合金新材料有限公司 | Silicon carbide-reinforced stibium-stannum-copper alloy bar and manufacturing method therefor |
| CN106435252B (en) * | 2016-12-14 | 2018-08-03 | 苏州金仓合金新材料有限公司 | A kind of SiC reinforcement antimony gun-metal stick and its manufacturing method |
| CN110650812A (en) * | 2017-04-07 | 2020-01-03 | 日本制铁株式会社 | Sintered friction material |
| CN110650812B (en) * | 2017-04-07 | 2022-04-05 | 日本制铁株式会社 | Sintered friction material |
| CN108384983A (en) * | 2018-03-06 | 2018-08-10 | 浙江灿根智能科技有限公司 | A kind of high-strength copper based alloy material |
| CN112059170A (en) * | 2020-08-24 | 2020-12-11 | 北京科技大学 | High-performance powder metallurgy brake pad and preparation method thereof |
| CN112593112A (en) * | 2020-10-23 | 2021-04-02 | 淮阴工学院 | Multiphase friction-reducing resistance-increasing copper alloy and preparation method thereof |
| CN112593112B (en) * | 2020-10-23 | 2021-09-24 | 淮阴工学院 | Multiphase friction-reducing resistance-increasing copper alloy and preparation method thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091202 |