CN103131389B - Environment-friendly high-wear-resistance wind power braking friction plate material - Google Patents
Environment-friendly high-wear-resistance wind power braking friction plate material Download PDFInfo
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- CN103131389B CN103131389B CN201310087701.9A CN201310087701A CN103131389B CN 103131389 B CN103131389 B CN 103131389B CN 201310087701 A CN201310087701 A CN 201310087701A CN 103131389 B CN103131389 B CN 103131389B
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Abstract
The invention relates to an environment-friendly high-wear-resistance wind power braking friction plate material belonging to the technical field of industrial material manufacturing. The material provided by the invention is prepared from copper, iron, tin, zirconite, graphite and carbon fibers used as raw materials through mixing, cold pressing and sintering. The material provided by the invention meets the environment protection requirements, and is stable in friction factor and long in product service life; the density, the porosity, the thermal conductivity and the like of the friction material can be well controlled; and the invention is beneficial to reduce the damage to a braking disk and lower the braking noise generation degree.
Description
Technical field
The invention belongs to Industrial materials manufacturing technology field, is a kind of material of friction plate.
Background technology
Brake strip is the key part in aerogenerator, and its performance directly affects the reliability of wind-power electricity generation and the efficiency of security and wind-power electricity generation, in aerogenerator, plays an important role.Drag friction sheet material not only needs to have high frictional coefficient and low wear rate, also should have good thermal conductivity and mechanical property etc., and traditional brake strip heat resisting temperature is low, wear rate is large, the leaded heavy metal that waits, life cycle is short, has affected the generating efficiency of blower fan.
The main performance deficiency of Present Domestic friction materials is: density is large, flame retardant properties is poor, high-temperature instantaneous frictional coefficient is low and unstable, wear away that the large life-span is short, noise pollution is serious.In friction materials, ubiquitous heavy metal Pb is also quite serious to the pollution of environment simultaneously, cannot meet development of modern industry and environmental requirement, and the wind-powered electricity generation friction plate on domestic market is import, and price is very high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of environmental protection high abrasion wind-powered electricity generation drag friction sheet material.
The scheme of technical solution problem of the present invention is to adopt copper, iron, tin, zircon, graphite and carbon fiber as starting material, and its weight percent is:
Graphite 10 ~ 15%;
Carbon fiber 1 ~ 3%;
Iron 4 ~ 7%;
Tin 6 ~ 7%;
Zircon 1 ~ 3%;
Surplus is copper;
Wherein, zircon-70 order; Iron powder-200 order; Glass putty-70 order; Copper powder 70 orders; Graphite length of a film is 260 ~ 300 μ m, and wide is 180 ~ 200 μ m, and thickness is 180 ~ 200 μ m; Carbon fiber is sheet, and length is 260 ~ 300 μ m, and wide is 100 ~ 200 μ m, and carbon fiber sheet thickness is 1 ~ 2 μ m;
Preparation process is as follows:
First by composition proportion, other material except graphite and carbon fiber is fully mixed, and then add graphite and the full and uniform mixing of carbon fiber; Mixed powder is colded pressing, and pressure is 570MPa, keeps 1min after moulding; Under nitrogen atmosphere, carry out sintering, temperature is 830 DEG C, and sintering time is 35min.
Preferred raw material weight percent of the present invention is:
Graphite 11 ~ 14%;
Carbon fiber 1 ~ 3%;
Iron 5 ~ 6%;
Tin 6 ~ 7%;
Zircon 1 ~ 3%;
Surplus is copper.
The present invention is best, and raw-material weight per-cent is:
Graphite 13%;
Carbon fiber 2%;
Iron 5 %;
Tin 7%;
Zircon 2%;
Copper 71%.
By MM-1000 friction wear testing machine testing friction polishing machine, utilize multi-usage shock-testing machine test shock strength.Frictional coefficient between 0.32～0.37, wear rate≤0.25 × 10
-7cm
3/ (N.m), shock strength>=4.5J/cm
2, the life-span is 2～3 times of conventional friction plate.
The invention has the beneficial effects as follows: not leaded environmental requirement, stable friction factor, the long product lifecycle of meeting in composition; The cellular structure design being made up of a certain amount of carbon fiber, larger graphite flake and particle hard point can be controlled friction materials density, void content, thermal conductivity etc. well, and is conducive to reduce retarding disc damage and reduces the degree that produces brake noise.
Brief description of the drawings
Fig. 1 is that composition is graphite 15%, carbon fiber 3%, iron 4%, zircon 2%, tin 6%, the sintering structure scanning electron microscope picture of copper 70;
Fig. 2 is that composition is graphite 10%, carbon fiber 1%, iron 7%, zircon 2%, tin 7%, the sintering structure scanning electron microscope picture of copper 73;
Fig. 3 is that composition is graphite 12%, carbon fiber 2%, iron 6%; Zircon 3%, tin 6%, the sintering structure scanning electron microscope picture of copper 70;
Fig. 4 is that composition is graphite 10%, carbon fiber 1%, iron 4%; Zircon 3%, tin 7%, the sintering structure scanning electron microscope picture of copper 75;
Fig. 5 is that composition is graphite 10%, carbon fiber 1%, iron 4%; Zircon 3%, tin 7%, the sintering structure frictional abrasion surface pattern metallograph of copper 75;
Fig. 6 is that composition is graphite 15%, carbon fiber 3%, iron 4%, zircon 2%, tin 6%, the sintering structure frictional abrasion surface pattern metallograph of copper 70;
Fig. 7 is that composition is graphite 10%, carbon fiber 1%, iron 7%, zircon 2%, tin 7%, the sintering structure X-ray diffractogram of copper 73.
Embodiment
Embodiment 1,
Get 1 kilogram, 72 kilograms of copper powders, 4 kilograms of iron powders, 7 kilograms of glass puttys, 1 kilogram, zircon powder, 15 kilograms, graphite and carbon fiber, zircon is crossed 70 mesh sieves, and iron powder is crossed 200 mesh sieves; Glass putty is crossed 70 mesh sieves; Copper powder is crossed 70 mesh sieves; Graphite length of a film is 260 ~ 300 μ m, and wide is 180 ~ 200 μ m, and thickness is 180 ~ 200 μ m; Carbon fiber is sheet, and length is 260 ~ 300 μ m, and wide is 100 ~ 200 μ m, and carbon fiber sheet thickness is 1 ~ 2 μ m;
First by composition proportion, other material except graphite and carbon fiber is fully mixed, and then add graphite and the full and uniform mixing of carbon fiber; Mixed powder is colded pressing, and pressure is 570MPa, keeps 1min after moulding; Under nitrogen atmosphere, carry out sintering, temperature is 830 DEG C, and sintering time is 35min.
Embodiment 2,
Get 3 kilograms, 74 kilograms of copper powders, 7 kilograms of iron powders, 6 kilograms of glass puttys, 3 kilograms, zircon powder, 10 kilograms, graphite and carbon fiber, zircon is crossed 70 mesh sieves, and iron powder is crossed 200 mesh sieves; Glass putty is crossed 70 mesh sieves; Copper powder is crossed 70 mesh sieves; Graphite length of a film is 260 ~ 300 μ m, and wide is 180 ~ 200 μ m, and thickness is 180 ~ 200 μ m; Carbon fiber is sheet, and length is 260 ~ 300 μ m, and wide is 100 ~ 200 μ m, and carbon fiber sheet thickness is 1 ~ 2 μ m;
First by composition proportion, other material except graphite and carbon fiber is fully mixed, and then add graphite and the full and uniform mixing of carbon fiber; Mixed powder is colded pressing, and pressure is 570MPa, keeps 1min after moulding; Under nitrogen atmosphere, carry out sintering, temperature is 830 DEG C, and sintering time is 35min.
Embodiment 3,
Get 2 kilograms, 71 kilograms of copper powders, 5 kilograms of iron powders, 7 kilograms of glass puttys, 2 kilograms, zircon powder, 13 kilograms, graphite and carbon fiber, zircon is crossed 70 mesh sieves, and iron powder is crossed 200 mesh sieves; Glass putty is crossed 70 mesh sieves; Copper powder is crossed 70 mesh sieves; Graphite length of a film is 260 ~ 300 μ m, and wide is 180 ~ 200 μ m, and thickness is 180 ~ 200 μ m; Carbon fiber is sheet, and length is 260 ~ 300 μ m, and wide is 100 ~ 200 μ m, and carbon fiber sheet thickness is 1 ~ 2 μ m;
First by composition proportion, other material except graphite and carbon fiber is fully mixed, and then add graphite and the full and uniform mixing of carbon fiber; Mixed powder is colded pressing, and pressure is 570MPa, keeps 1min after moulding; Under nitrogen atmosphere, carry out sintering, temperature is 830 DEG C, and sintering time is 35min.
Experimental example 1,
as shown in Figure 1,2,3, 4, in figure, after visible sintering, be organized as copper based solid solution, graphite, carbon fiber and hard particles.Canescence matrix is copper based solid solution, the iron particle being uniform-distribution with on it, and black region is graphite, and white bright particle region is zircon, and carbon fiber is netted and mixes with graphite.
The advantage of this structure design is: iron particle and copper matrix are combined closely, and plays the effect of strengthening copper matrix.The zircon hardness adding is higher, has effectively improved the frictional coefficient of material, but is that content and the granular size that reduces the abrasion loss zircon of antithesis will be controlled within the specific limits.Graphite plays lubricated effect in friction materials, the high lubricating effect of larger graphite flake, but the wear resistance of large graphite flake is poor, therefore, add the lubricant effect that a certain amount of carbon fiber can both keep graphite, can effectively improve again wear resistance, and wherein the most outstanding performance is that the braking characteristic of material under various initial speeds of braking is all quite steady, and the mobility scale of the instantaneous coefficient of friction of material is very little.
Experimental example 2,
First press composition proportion by other powder mixing 10min except graphite and carbon fiber, and then add graphite and carbon fiber evenly to mix 10min.The benefit of this mode is, copper is fully mixed with iron, tin, zircon etc., and graphite does not damage because mixing with carbon fiber sheet simultaneously, keeps to greatest extent original form.As shown in Fig. 1,2,3,4, in friction plate, carbon fiber is netted and graphite and mixes.
Experimental example 3,
As shown in Fig. 5, the configuration of surface in figure after visible friction-wear test, after the friction of for some time, only presents slight ditch dug with a plow, and the copper matrix abrasive conditions of iron content not obvious (as shown by arrows), coming off does not appear in graphite flake.
Experimental example 4,
Fig. 6 is visible, the zircon of larger particles is not affected by frictional wear, does not occur obscission, illustrates that the bonding strength of zircon and matrix is very high, and the zircon of high rigidity has good effect to the wear Characteristics of material, thereby material has obtained high-wearing feature.
Carbon fiber in material can keep the lubricity of carbon on the one hand, can make again on the other hand more large stretch of graphite in friction process, not come off easily and consume.High rigidity particle, graphite, carbon fiber and this combination of copper matrix, make the friction plate of preparation not only have higher frictional coefficient but also have good anti-attrition wear resisting property.
Experimental example 5,
Fig. 7 is sintering structure X-ray diffractogram.From map analysis, sintering has graphite and copper etc. mutually, and in composition, tin should be solid-solubilized in copper.
Claims (1)
1. an environmental protection high abrasion wind-powered electricity generation drag friction sheet material, is characterized in that adopting copper, iron, tin, zircon, graphite and carbon fiber as starting material, and its weight percent is:
Graphite 13%;
Carbon fiber 2%;
Iron 5 %;
Tin 7%;
Zircon 2%;
Copper 71%;
Wherein, zircon is 70 orders; Iron is 200 orders; Tin is 70 orders; Copper is 70 orders; Graphite length is 260 ~ 300 μ m, and wide is 180 ~ 200 μ m, and thickness is 180 ~ 200 μ m; Carbon fiber is sheet, and length is 260 ~ 300 μ m, and wide is 100 ~ 200 μ m, and carbon fiber sheet thickness is 1 ~ 2 μ m;
Preparation process is as follows:
First by composition proportion, other material except graphite and carbon fiber is fully mixed, and then add graphite and the full and uniform mixing of carbon fiber; Mixed powder is colded pressing, and pressure is 570MPa, keeps 1min after moulding; Under nitrogen atmosphere, carry out sintering, temperature is 830 DEG C, and sintering time is 35min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310087701.9A CN103131389B (en) | 2013-03-19 | 2013-03-19 | Environment-friendly high-wear-resistance wind power braking friction plate material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087701.9A CN103131389B (en) | 2013-03-19 | 2013-03-19 | Environment-friendly high-wear-resistance wind power braking friction plate material |
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| CN103131389B true CN103131389B (en) | 2014-08-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109079133B (en) * | 2018-10-31 | 2021-04-02 | 长春工业大学 | Brake friction sheet material with high stable friction coefficient and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317530A (en) * | 2001-04-20 | 2001-10-17 | 清华大学 | Cermet friction material containing steel fibres and its preparing process |
| CN101493127A (en) * | 2008-10-31 | 2009-07-29 | 贵州新安航空机械有限责任公司 | Copper-based powder metallurgy high speed brake lining |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317530A (en) * | 2001-04-20 | 2001-10-17 | 清华大学 | Cermet friction material containing steel fibres and its preparing process |
| CN101493127A (en) * | 2008-10-31 | 2009-07-29 | 贵州新安航空机械有限责任公司 | Copper-based powder metallurgy high speed brake lining |
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