CN103820078B - Method for preparing brake pad friction material by using rice and wheat straws - Google Patents
Method for preparing brake pad friction material by using rice and wheat straws Download PDFInfo
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- CN103820078B CN103820078B CN201210576364.5A CN201210576364A CN103820078B CN 103820078 B CN103820078 B CN 103820078B CN 201210576364 A CN201210576364 A CN 201210576364A CN 103820078 B CN103820078 B CN 103820078B
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Abstract
The invention discloses a method for preparing a brake pad friction material by using rice and wheat straws and relates to the technical field of composite materials. The brake pad friction material has the following formula: 15 percent of toughened fibers, 16 percent of modified resin, 14 percent of a friction increase agent, 9 percent of sulfur and tin powder, 1.6 percent of carbon black, 2.5 percent of zinc oxide, 8.9 percent of barium sulfate, 10 percent of rice and wheat straw carbon powder, 6 percent of aluminum hydroxide, 14 percent of modified li beads and 3 percent of zinc stearate. The materials are uniformly mixed and stirred, pressed in a mold and subjected to machining such as grinding and chamfering according to a technical requirement to obtain a braking pad. According to the method, the rice and wheat straws are used as raw materials to prepare carbon powder which replaces graphite in a friction material formula, so that the atmospheric pollution caused by severe combustion of straws in each year is alleviated, the production cost of the brake pad is reduced, and the brake performance and the braking effect are enhanced; the friction coefficient is stable; the brake pad is simple in structure, low in brake noise, environment-friendly and pollution-free.
Description
Technical field
The present invention relates to technical field of composite materials, particularly relate to a kind of method that rice wheat straw makes brake block friction material.
Background technology
Since reform and opening-up, national economy increases fast, and scientific and technical innovation, autonomous innovation have become the main flow of domestic industry development, and China's industry is just progressively to the future development of intensive style, energy-saving and emission-reduction, low-carbon (LC).Along with the raising day by day of people's living standard, also increasing to the demand of automobile.In recent years, the production and marketing quantity of China's automobile industry constantly increases, and China becomes an automobile production and marketing big country already.On automobile, most important security system is exactly breaking system, and all brake components are all safety members, and brake facing is one of link important in whole breaking system, directly has influence on the reliability of whole breaking system.Brake facing forms friction pair with the mutual friction of brake flange (drum) phase, produces braking moment, thus reaches the object of vehicle deceleration brake.Brake facing in Motor vehicles mainly adopts the plurality of raw materials such as asbestos, steel fiber, resin to make, made brake facing have than great, thermal conductivity is low, poor heat stability, noise are high and the shortcoming such as non-refractory, there is the defects such as brake poor reliability, quick abrasion, easy aging fracture, work-ing life is short.Secondly, owing to being prohibited use containing carcinogenic substance by country in asbestos.At present, as the substitute products of asbestos brake lining, the materials such as general employing mineral fibre, Carbon fibe, steel fiber are made, but all in various degree there is the shortcomings such as fusing point is low, thermostability is low, radiating effect is poor, frictional coefficient is little, braking quality is poor, work-ing life is short, manufacturing cost is high, especially under frequently braking or scram state, the surface of friction of brake facing easily produces metal transfer and scuffing, causes the sensitivity of brake facing clutch to decline.Along with the development of technology, scale graphite, with the performance such as little, high temperature resistant, the high heat conduction of its distinctive proportion, self-lubricating, by force wear-resisting, stiff stability, anti-thermal shock, plasticity-that noise abatement is good and good, is applied in brake facing industry.No matter motor vehicle brake block is asbestos brake lining or non-asbestos brake block, all cooks low friction compound with graphite, and the first is in order to protect antithesis, and it two is to reduce noise.But because graphite Mineral resources reduce year by year, graphite market value constantly rises, cost increases, and enterprise is difficult to bear.The technician of R&D institution and enterprise is constantly exploring, is studying, wish the scale graphite friction materials substitute developing a kind of superior performance, to meet the need of market, although make some progress, in practice, still there is the technical barrier not yet overcome.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of rice wheat straw is provided to make the method for brake block friction material, the method is that powdered carbon made by starting material with rice wheat straw, to reduce the usage quantity of friction materials to scale graphite, enhance braking quality and braking effect, reduce production cost, stable friction factor, structure is simple, and brake noise is little, environment friendly and pollution-free.
The technical solution adopted for the present invention to solve the technical problems is as follows: one rice wheat straw makes carbon dust friction materials, following material composition is added: toughened fiber 15% with this friction materials, modified resin 16%, increase the agent 14% that rubs, sulphur+glass putty 9%, carbon black 1.6%, zinc oxide 2.5%, barium sulfate 8.9%, rice wheat straw powdered carbon 10%, aluminium hydroxide 6%, modification Li pearl 14%, Zinic stearas 3%, by above-mentioned materials mixing and stirring, suppress in a mold, temperature controls at 150 DEG C ~ 160 DEG C, press pressing pressure is 18 MPas, be vented 3 times, each 30 seconds, be incubated 300 seconds, postheat treatment temperature is 150 DEG C ~ 180 DEG C, time determines according to workpiece size, general 4 ~ 12 hours, when being then cooled to 50 DEG C, thermal treatment terminates, grinding is carried out by processing requirement, the mechanical workouts such as chamfering, namely obtain and use straw of the present invention, the brake facing that straw carbon dust friction materials is made.
Described rice wheat straw powdered carbon makes as follows:
Rice wheat straw is selected materials, and---------height is pressed into plug, and---charing---pulverizes in pulverizing in oven dry in cleaning.
One, rice wheat straw is selected materials cleaning
Select the rice wheat straw of a term, mouldy, rotten can not use, and after adopting the rice wheat straw of new harvesting to regain, cleans the earth on stalk and impurity.
Two, dry
Rice wheat straw after cleaning carries out being exposed to the sun or drying under the sun.If dried, temperature controlled at 45 DEG C-55 DEG C, drying time controls at 1 hour-1.5 hours, but can not make rice wheat straw surface browning look or fragility occur, the color that rice wheat straw must be kept original and toughness.Detect by wheat and rice straw Moisture Meter, water content control is at about 9%-12%, and water content is maximum can not more than 13%.
Three, pulverize
Pulverized by rice wheat straw after drying, after pulverizing, length is 0.1-0.2 cm, and the rice wheat straw after pulverizing must not outdoor storage, and with dryness storehouse, stock is put, and is strictly on guard against and again enters moisture content.
Four, height is pressed into plug
5%20-40 order zonolite is added in rice wheat straw after pulverizing, and stir with stirrer, utilize the characteristic of vermiculite high-temperature expansion, increase the uniformity coefficient that plug is heated, thus raising carbonization quality, then be pressed into rod-made machine the plug that length is 10 centimetres, diameter is 6 cm.
Five, carbonize
1, adopt track stove or industry kiln to carbonize, the humidity discharging phase rises to 130 DEG C from igniting to furnace temperature, and the time is 4 hours.
2, elementary carbonization temperature is from 130 DEG C to 250 DEG C, opens gas blower, and to air blast in kiln, elementary carbonization time is 4 hours, and gas blower leaves 30 minutes, stops 30 minutes, totally 4 times.
3, full carbonization temperature is from 250 DEG C to 500 DEG C, and the heating-up time is 1.5 hours, after temperature rises to 500 DEG C, keep 2 hours, after 2 hours, then be warming up to 650 DEG C, time is 4 hours, during this, and gas blower leaves 1 hour, stop 1 hour, totally 2 times, after 4 hours, be warming up to 850 DEG C again, rear cut out gas blower, after 1 hour, opens ventilator, send into air and water vapour, attentional manipulation steam vapour amount, keeps 6 hours.
4, lower the temperature reach 850 DEG C from full carbonization temperature after within 7 hours, carry out, first use a small amount of water slow cooling, stopping water after temperature drops to 200 DEG C, afterwards by Temperature fall in stove, after in-furnace temperature drops to 100 DEG C, open fire door, progressively cool.
Six, grind
With pulverizer, the carbon rod after full charing is pulverized, after being ground into fine particle, add the fine particle talcum of 5%, uniform stirring, then grind into 100 object powder with Raymond mill.
Seven, test rating
Outward appearance: black, Vandyke brown
Order number: be less than or equal to 100 orders
Ash content: be less than 4%
Density: 1.4-1.5
Carbon content: 75%-78%
Moisture: be less than 3%
Mohs' hardness: be less than 2
Oil number: be greater than 50ml/g
Beneficial effect of the present invention: China's rice wheat straw aboundresources, cost recovery is low, replaces graphite with rice wheat straw powdered carbon, reduces every year due to the topsoil that a large amount of crop straw burning brings, and reduces the production cost of brake facing.The method is that graphite in powdered carbon replacement friction material formulation made by starting material with rice wheat straw, and enhance braking quality and braking effect, stable friction factor, structure is simple, and brake noise is little, environment friendly and pollution-free.
Embodiment
Here is that the invention will be further described in conjunction with the embodiments:
Following steps for manufacturing rice wheat straw powdered carbon friction materials:
One, rice wheat straw is selected materials cleaning
Select the rice wheat straw 1 ton of a term, mouldy, rotten can not use, and after adopting the rice wheat straw of new harvesting to regain, cleans the earth on stalk and impurity.
Two, dry
Rice wheat straw after cleaning carries out being exposed to the sun or drying under the sun.If dried, control temperature at 45 ± 1 DEG C, the time freely controls, but can not make rice wheat straw surface discolouration, must keep the color that rice wheat straw is original.Detect by wheat and rice straw Moisture Meter, water content control is about 10%, and water content is maximum can not more than 13%.
Three, pulverize,
Pulverized by rice wheat straw after drying, after pulverizing, length is 0.1-0.2 cm, and the rice wheat straw after pulverizing must not outdoor storage, forbids again to intake.
Four, height is pressed into plug
5%20-40 order zonolite is added in rice wheat straw after pulverizing, and stir with stirrer, utilize the characteristic of vermiculite high-temperature expansion, increase the uniformity coefficient that plug is heated, thus raising carbonization quality, then be pressed into rod-made machine the plug that length is 10 centimetres, diameter is 6 cm.
Five, carbonize
1) adopt track stove or industry kiln to carbonize, the humidity discharging phase rises to 130 DEG C from igniting to furnace temperature, and the time is 4 hours.
2) elementary carbonization temperature is from 130 DEG C to 250 DEG C, opens gas blower, and to air blast in kiln, elementary carbonization time is 4 hours, and gas blower leaves 30 minutes, stops 30 minutes, totally 4 times.
3) full carbonization temperature is from 250 DEG C to 500 DEG C, and the heating-up time is 1.5 hours, after temperature rises to 500 DEG C, keep 2 hours, after 2 hours, then be warming up to 650 DEG C, time is 4 hours, during this, and gas blower leaves 1 hour, stop 1 hour, totally 2 times, after 4 hours, be warming up to 850 DEG C again, rear cut out gas blower, after 1 hour, opens ventilator, send into air and water vapour, attentional manipulation steam vapour amount, keeps 6 hours.
4) within 7 hours, carry out after cooling reaches 850 DEG C from full carbonization temperature, first use a small amount of water slow cooling, stopping water after temperature drops to 200 DEG C, afterwards by Temperature fall in stove, after in-furnace temperature drops to 100 DEG C, open fire door, progressively cool.
Six, grind
With pulverizer, the carbon rod after full charing is pulverized, after being ground into fine particle, add the fine particle talcum of 5%, uniform stirring, then grind into 100 object powder with Raymond mill.
Seven, test rating
Outward appearance: black, Vandyke brown
Order number: be less than or equal to 100 orders
Ash content: be less than 4%
Density: 1.4-1.5
Carbon content: 75%-78%
Moisture: be less than 3%
Mohs' hardness: be less than 2
Oil number: be greater than 50ml/g.
Rice wheat straw carbon dust friction materials of the present invention is obtained in order to top method.
Get above-mentioned rice wheat straw powdered carbon 10g, add toughened fiber 15g, modified resin 16g, increase the agent 14g that rubs, sulphur+glass putty 9g, carbon black 1.6g, zinc oxide 2.5g, barium sulfate 8.9g, aluminium hydroxide 6.0g, modification Li pearl 14g, Zinic stearas 3g, by above-mentioned materials mixing and stirring, suppress in a mold, temperature controls at 150 DEG C, press pressing pressure is 18 MPas, be vented 3 times, each 30 seconds, be incubated 300 seconds, postheat treatment is 150 DEG C, time is 4 hours, when being then cooled to 50 DEG C, thermal treatment terminates, again above-mentioned obtained material is carried out grinding by processing requirement, the mechanical workouts such as chamfering, namely obtain and use straw of the present invention, the brake facing of straw carbon dust friction materials.
With the brake facing that rice wheat straw carbon dust friction materials of the present invention is obtained, test on constant speed trier according to GB5763-2008 standard, result is as following table:
From table, data can be found out, the brake facing that the present invention obtains, in the temperature rise period, frictional coefficient is 0.3 ~ 0.4, and at temperature-fall period, frictional coefficient is 0.3 ~ 0.4, and wear rate is little, is up to state standards completely.Add brake facing product that this product 10% makes in friction material formulation to carry out detecting in Shandong good faith, Russia and all meet GB5763-2008 and GB5764-1998 standard and domestic brake facing industry standard.The brake facing utilizing this technology to produce entrucking on Shanghai Volkswagen's Jetta automobile is tried out, through getting over Taihang Mountain, Wangwu Shan Mountain, the Qinling Mountains, Wudang Mountain, accumulative 100000 kilometers, in driving process, braking steadily, brake noise is little, the friction life-span is long, than the stable performance of graphite brake facing, is a kind of novel environment friendly product.This product is widely used in the friction materials of transportation and communication and various Working machine friction stopping device.As friction materials play regulate frictional coefficient, wear-resisting, lubrication, protection antithesis, lower brake facing brake time noise, reduce friction materials to the usage quantity of scale graphite.
Claims (2)
1. a making method for rice wheat straw carbon dust, is characterized in that:
Rice wheat straw is selected materials, and---------height is pressed into plug, and---charing---pulverizes in pulverizing in oven dry in cleaning;
One, rice wheat straw is selected materials cleaning
Select the rice wheat straw of a term, mouldy, rotten can not use, and after adopting the rice wheat straw of new harvesting to regain, cleans the earth on stalk and impurity;
Two, dry
Rice wheat straw after cleaning carries out being exposed to the sun or drying under the sun, if dried, temperature is controlled at 45 DEG C-55 DEG C, drying time controls at 1 hour-1.5 hours, but can not make rice wheat straw surface browning look or fragility occurs, the color that rice wheat straw must be kept original and toughness, detect by wheat and rice straw Moisture Meter, water content control is at 9%-12%, and water content is maximum can not more than 13%;
Three, pulverize
Pulverized by rice wheat straw after drying, after pulverizing, length is 0.1-0.2 centimetre, and the rice wheat straw after pulverizing must not outdoor storage, and with dryness storehouse, stock is put, and is strictly on guard against and again enters moisture content;
Four, height is pressed into plug
5%20-40 order zonolite is added in rice wheat straw after pulverizing, and stir with stirrer, utilize the characteristic of vermiculite high-temperature expansion, increase the uniformity coefficient that plug is heated, thus raising carbonization quality, then be pressed into rod-made machine the plug that length is 10 centimetres, diameter is 6 centimetres;
Five, carbonize
1) adopt track stove or industry kiln to carbonize, the humidity discharging phase rises to 130 DEG C from igniting to furnace temperature, and the time is 4 hours;
2) elementary carbonization temperature is from 130 DEG C to 250 DEG C, opens gas blower, and to air blast in kiln, elementary carbonization time is 4 hours, and gas blower leaves 30 minutes, stops 30 minutes, totally 4 times;
3) full carbonization temperature is from 250 DEG C to 500 DEG C, and the heating-up time is 1.5 hours, after temperature rises to 500 DEG C, keep 2 hours, after 2 hours, then be warming up to 650 DEG C, time is 4 hours, during this, and gas blower leaves 1 hour, stop 1 hour, totally 2 times, after 4 hours, be warming up to 850 DEG C again, rear cut out gas blower, after 1 hour, opens ventilator, send into air and water vapour, attentional manipulation steam vapour amount, keeps 6 hours;
4) within 7 hours, carry out after cooling reaches 850 DEG C from full carbonization temperature, first use a small amount of water slow cooling, stopping water after temperature drops to 200 DEG C, afterwards by Temperature fall in stove, after in-furnace temperature drops to 100 DEG C, open fire door, progressively cool;
Six, grind
With pulverizer, the carbon rod after full charing is pulverized, after being ground into fine particle, add the fine particle talcum of 5%, uniform stirring, then grind into 100 object powder with Raymond mill;
Seven, test rating
Outward appearance: black, Vandyke brown
Order number: be less than or equal to 100 orders
Ash content: be less than 4%;
Density: 1.4-1.5;
Carbon content: 75%-78%;
Moisture: be less than 3%;
Mohs' hardness: be less than 2;
Oil number: be greater than 50ml/g.
2. make a method for brake block friction material of the rice wheat straw carbon dust that method is made as claimed in claim 1, the steps include:
This friction materials comprises following material composition: toughened fiber 15%, modified resin 16%, increase the agent 14% that rubs, the mixture 9% of sulphur and glass putty, carbon black 1.6%, zinc oxide 2.5%, barium sulfate 8.9%, the rice wheat straw powdered carbon 10% made of method as claimed in claim 1, aluminium hydroxide 6%, modification Li pearl 14%, Zinic stearas 3%, by above-mentioned materials mixing and stirring, suppress in a mold, temperature controls at 150 DEG C ~ 160 DEG C, press pressing pressure is 18 MPas, be vented 3 times, each 30 seconds, be incubated 300 seconds, postheat treatment temperature is 150 DEG C ~ 180 DEG C, time determines according to workpiece size, it is 4 ~ 12 hours, when being then cooled to 50 DEG C, thermal treatment terminates, mechanical workout is carried out by processing requirement, i.e. obtained brake facing.
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| CN201210576364.5A CN103820078B (en) | 2012-12-27 | 2012-12-27 | Method for preparing brake pad friction material by using rice and wheat straws |
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| CN201210576364.5A CN103820078B (en) | 2012-12-27 | 2012-12-27 | Method for preparing brake pad friction material by using rice and wheat straws |
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| CN103820078A CN103820078A (en) | 2014-05-28 |
| CN103820078B true CN103820078B (en) | 2015-06-17 |
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| CN104610916B (en) * | 2015-02-11 | 2017-03-15 | 江苏金麦穗新能源科技股份有限公司 | A kind of rice wheat straw activated carbon powder toughness reinforcing particle friction material and preparation method thereof |
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| CN104976258A (en) * | 2015-06-24 | 2015-10-14 | 黄晓霜 | Environment-friendly brake pad |
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| CN106224417A (en) * | 2016-08-16 | 2016-12-14 | 广西南宁胜祺安科技开发有限公司 | A kind of durable brake block adding activated carbon powder |
| CN106867450B (en) * | 2017-01-23 | 2018-09-11 | 陕西科技大学 | A kind of preparation method of zinc oxide nanowire/carbon cloth friction material |
| CN108412925B (en) * | 2018-03-20 | 2019-09-13 | 安徽三联学院 | A kind of material and material preparation method of automotive brake pads |
| CN114322536B (en) * | 2020-09-30 | 2023-11-03 | 江苏鑫浩新材料科技有限公司 | Belt type ceramsite sintering machine and belt type ceramsite sintering method |
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