CN101592204A - A kind of non-metal ceramic-based automobile brake sheet and preparation method thereof - Google Patents
A kind of non-metal ceramic-based automobile brake sheet and preparation method thereof Download PDFInfo
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- CN101592204A CN101592204A CNA2009103040353A CN200910304035A CN101592204A CN 101592204 A CN101592204 A CN 101592204A CN A2009103040353 A CNA2009103040353 A CN A2009103040353A CN 200910304035 A CN200910304035 A CN 200910304035A CN 101592204 A CN101592204 A CN 101592204A
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Abstract
The invention discloses a kind of non-metal ceramic-based automobile brake sheet, its material prescription is counted by weight percentage and is bonding matrix 15-30, reinforcing fiber 25-40, frictional property regulator 10-20, antifriction lubricant 15-30, elasticity plasticizer 5-10, filler 10-30.The non-metal ceramic-based automobile brake sheet that the present invention is a kind of long service life, manufacturing property is good, preparation method's simple possible of this non-metal ceramic-based automobile brake sheet.
Description
Technical field
The present invention relates to a kind of automobile brake sheet, particularly a kind of non-metal ceramic-based compound brake block that is used for brake system of car the invention still further relates to the preparation method of this automobile brake sheet.
Background technique
Automobile brake sheet is the category-A key components and parts of brake system of car, and the quality of its performance is directly connected to the Security and the reliability of automobilism.The automobile brake sheet of main flow all adopts semimetal or few metal-resin base frication material in the market, when automobile during in continuous or emergency braking, the temperature on brake block and brake disc surface is up to 500～700 ℃, because resin base brake block heat resistance is not good enough, at high temperature can decompose and emit water, gas, wet goods, form thin film at friction surface, make dry friction become mixed friction or wet friction, friction factor significantly reduces, the hidden danger that exists brake to lose efficacy is simultaneously because a large amount of thermolysiss of resin have reduced its cementation, material at high temperature wearing and tearing aggravation causes significantly reduce the working life of brake block.Some ceramic automobile brake blocks on the market adopt the ceramic fiber of more amount to substitute traditional Steel Fibre at present, although its braking comfort property (comprise noise, fall ash and with the antithesis matching etc.) obviously improve, but owing to still adopt resin, caused it at high temperature to exist and very easily cracked and problems such as high-temperature wear behavior is relatively poor as main Bond.
Summary of the invention
First technical problem to be solved by this invention provides a kind of long service life, non-metal ceramic-based automobile brake sheet that manufacturing property is good.
Technical problem to be solved by this invention provides the preparation method of this non-metal ceramic-based automobile brake sheet.
In order to solve the problems of the technologies described above, non-metal ceramic-based automobile brake sheet provided by the invention, its material prescription is counted by weight percentage and is bonding matrix 15-30, reinforcing fiber 20-40, frictional property regulator 10-20, antifriction lubricant 15-30, elasticity plasticizer 5-10, filler 10-30, wherein:
Described bonding matrix mainly with the modification sodium aluminosilicate as inorganic high-temperature agglomerant, a small amount of phenolic resin is as low temperature additional adhesive in organic, the weight ratio of inorganic ceramic Bond and organic binder=5: 1; Described reinforcing fiber mainly is made up of aramid fibre, potassium titanate crystal whisker, pottery or mineral fibre, and its weight proportion is an aramid fibre: potassium titanate crystal whisker: ceramic fiber=1: 4: 10; Described frictional property regulator comprises increasing grinding agent that chromite powder and troilite powder by 05% are formed; Described antifriction lubricant is made up of antimony sulphide, graphite etc., and its weight proportion is an antimony sulphide: graphite=1: 2; Described elasticity plasticizer is made up of acrylonitrile-butadiene rubber powder, friction powder, and its weight proportion is an acrylonitrile-butadiene rubber powder: friction powder=1: 1; Described filler is made up of barite and composite filling, and its weight proportion is a blanc fixe: composite filling=5: 2.
The non-metal ceramic-based automobile brake sheet that the present invention further provides, its material prescription count by weight percentage into:
Vitrified bond 10～20 (wt.%), resin/rubber 5～10 (wt.%),
Pottery/mineral fibre 15～25 (wt.%), aramid fiber slurry pool 1～2 (wt.%),
Potassium titanate crystal whisker 4～10 (wt.%), graphite 6～16 (wt.%),
Antimony sulphide 3～8 (wt.%), chromite 1～2 (wt.%),
Pyrite 1～2 (wt.%), organic friction powder 2～5 (wt.%),
Barite 10～20 (wt.%), composite filling 4～8 (wt.%).
In order to solve above-mentioned second technical problem, the preparation method of this non-metal ceramic-based automobile brake sheet provided by the invention comprises the steps:
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: load weighted each material is dropped in the high speed mixer mixing time 4～5 minutes;
(3), moulding: take by weighing mixture by the brake block model, pour in the hot-pressing die, pressing pressure 200～300kgf/cm
2, 160～200 ℃ of hot pressing temperatures, exhaust 10～12 times, the dwell time decides according to the thickness of brake block, generally is 55～65s/mm;
(4), heat treatment: brake block was warmed up to 160 ℃ at 2 hours from room temperature, is incubated 4 hours, be warmed up to 210 ℃ at 1 hour again, be incubated 4 hours, cool to room temperature then with the furnace;
(5), the more above-mentioned product that makes is carried out grinding, chamfering by technical requirements, fluting carries out the high temperature ablation surface treatment then under 650～700 ℃ temperature, through spraying, seal mark, is processed into automobile brake sheet again.
Adopt non-metal ceramic-based automobile brake sheet of technique scheme and preparation method thereof, with respect to the ceramic resin group automobile brake block, non-metal ceramic-based automobile brake sheet all increases significantly at aspects such as velocity coherence, Braking efficiency, noise control, the ash control of falling, working lifes especially resistance to high temperature, and manufacture cost remains basically stable, and is the higher new automobile brake friction material of a kind of cost performance.
In sum, the non-metal ceramic-based automobile brake sheet that the present invention is a kind of long service life, manufacturing property is good, preparation method's simple possible of this non-metal ceramic-based automobile brake sheet.
Embodiment
The invention will be further described below in conjunction with embodiment.
The prescription of non-metal ceramic-based brake block provided by the invention:
Vitrified bond 10～20 (wt.%), resin/rubber 5～10 (wt.%),
Pottery/mineral fibre 15～25 (wt.%), aramid fiber slurry pool 1～2 (wt.%),
Potassium titanate crystal whisker 4～10 (wt.%), graphite 6～16 (wt.%),
Antimony sulphide 3～8 (wt.%), chromite 1～2 (wt.%),
Pyrite 1～2 (wt.%), organic friction powder 2～5 (wt.%),
Barite 10～20 (wt.%), composite filling 4～8 (wt.%).
In this formula system, vitrified bond mainly is to receive as high-temperature agglomerant with the manosil AS of modification, can significantly improve the heat resistance of material, reduce material wear extent at high temperature, and can make material form mesh structural porous structure, and increase the braking stationarity, reduce brake noise.For continuing to continue to use the moulding process and the manufacturing mechanism of resin base automobile brake sheet, add a spot of resin and rubber, drop into and cost of production with reduction equipment.Pottery or mineral fibre have advantages such as serviceability temperature height, humidity resistance is good, wearing and tearing are little, and can play the effect that the brake travelling comfort is strengthened and improved to microcosmic.Crystal whisker of hexa potassium titanate is a kind of short fibre composite of novel needle-like, has very good mechanics physical property: high strength, high-modulus, wear-resistant, high temperature resistant, heat insulation, high electric insulating quality and excellent properties of infrared reflection.During graphite is used as, low temperature lubricant, antimony sulphide forms the antifriction film at material surface as the medium and high temperature oiling agent, can increase the braking stationarity, reduces wearing and tearing, increases the service life.Chromite, pyrite, organic friction powder etc. can improve friction factor, increase Braking efficiency.Barite, composite filling etc. are except that playing the effect that reduces cost, and the porosity ratio of can also stablize friction factor, regulating material improves the brake travelling comfort.
The preparation process of non-metal ceramic-based automobile brake sheet comprises the steps:
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: load weighted each material is dropped in the high speed mixer mixing time 4～5 minutes;
(3), moulding: take by weighing mixture by the brake block model, pour in the hot-pressing die, pressing pressure 200～300kgf/cm
2, 160～200 ℃ of hot pressing temperatures, exhaust 10～12 times, the dwell time decides according to the thickness of brake block, generally is 55～65s/mm;
(4), heat treatment: brake block was warmed up to 160 ℃ at 2 hours from room temperature, is incubated 4 hours, be warmed up to 210 ℃ at 1 hour again, be incubated 4 hours, cool to room temperature then with the furnace;
(5), the more above-mentioned product that makes is carried out grinding, chamfering by technical requirements, fluting carries out the high temperature ablation surface treatment then under 650～700 ℃ temperature, through spraying, seal mark, is processed into automobile brake sheet again.
The performance of non-metal ceramic-based automobile brake sheet
By GB5763-98 non-metal ceramic-based and nonmetal resin base automobile brake sheet has been carried out fixed speed fricting test, test result sees Table 1.
Non-metal ceramic-based and the ceramic brake constant speed test result of table 1
As can be seen from Table 1, the friction factor of non-metal ceramic-based automobile brake sheet from 100 ℃ to 350 ℃ variation less, wear rate rising with temperature before 250 ℃ is in rising trend, the wear rate of material decreases on the contrary with the rising of temperature after 250 ℃, there is not oil film on the rubbing surface, the brake pad surface is complete, flawless; The friction factor of nonmetal resin base brake block raise with temperature before 250 ℃, and decline is big slightly during high temperature, wear resistance is relatively poor, one deck oil film is arranged on the rubbing surface, and crackle appears in the brake pad surface.In the constant speed test, the combination property of non-metal ceramic-based automobile brake sheet is apparently higher than nonmetal resin base automobile brake sheet.
Non-metal ceramic-based automobile brake sheet to a certain vehicle is tested on the inertia bench testing machine, and test procedure is C406-98.The result shows, in potency test, and the high speed of non-metal ceramic-based brake block and low speed inefficiency≤5%; In decline test, high coefficient of friction is 0.39, and minimum friction factor is 0.36; In the test of paddling, high coefficient of friction is 0.36, and minimum is 0.32; Total wear extent is 0.15mm, and Friction Disk Surface is complete, does not have collapse limit, flawless.
In sum, compare similar resin-based brake block, with the automobile brake sheet that the technology of the present invention makes, its coefficient of friction increases to some extent Greatly, high-temperature stability and wearability are better. Non-metal ceramic-based automobile brake sheet is the higher new-type friction material of a kind of cost performance , have wide market application foreground.
Claims (3)
1. non-metal ceramic-based automobile brake sheet is characterized in that: its material prescription is counted by weight percentage and is bonding matrix 15-30, reinforcing fiber 25-40, frictional property regulator 10-20, antifriction lubricant 15-30, elasticity plasticizer 5-10, filler 10-30.Wherein:
Described bonding matrix mainly with the modification sodium aluminosilicate as inorganic high-temperature agglomerant, a small amount of phenolic resin is as low temperature additional adhesive in organic, the weight ratio of inorganic ceramic Bond and organic binder=5: 1; Described reinforcing fiber mainly is made up of aramid fibre, potassium titanate crystal whisker, pottery or mineral fibre, and its weight proportion is an aramid fibre: potassium titanate crystal whisker: ceramic fiber=1: 4: 10; Described frictional property regulator comprises increasing grinding agent, is made up of chromite powder and the troilite powder of 0-5%; Described antifriction lubricant is made up of antimony sulphide, graphite etc., and its weight proportion is an antimony sulphide: graphite=1: 2; Described elasticity plasticizer is made up of acrylonitrile-butadiene rubber powder, friction powder, and its weight proportion is an acrylonitrile-butadiene rubber powder: friction powder=1: 1; Described filler is made up of barite and composite filling, and its weight proportion is a blanc fixe: composite filling=5: 2.
2. non-metal ceramic-based automobile brake sheet according to claim 1 is characterized in that: its material prescription count by weight percentage into:
Vitrified bond 10～20, resin/rubber 5～10,
Pottery/mineral fibre 15～25, aramid fiber slurry pool 1～2,
Potassium titanate crystal whisker 4～10, graphite 6～16,
Antimony sulphide 3～8, chromite 1～2,
Pyrite 1～2, organic friction powder 2～5,
Barite 10～20, composite filling 4～8.
3. prepare the method for the described non-metal ceramic-based automobile brake sheet of claim 1, it is characterized in that: comprise the steps:
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: load weighted each material is dropped in the high speed mixer mixing time 4～5 minutes;
(3), moulding: take by weighing mixture by the brake block model, pour in the hot-pressing die, pressing pressure 200～300kgf/cm2,160～200 ℃ of hot pressing temperatures, exhaust 10～12 times, the dwell time decides according to the thickness of brake block, generally is 55～65s/mm;
(4), heat treatment: brake block was warmed up to 160 ℃ at 2 hours from room temperature, is incubated 4 hours, be warmed up to 210 ℃ at 1 hour again, be incubated 4 hours, cool to room temperature then with the furnace;
(5), the more above-mentioned product that makes is carried out grinding, chamfering by technical requirements, fluting carries out the high temperature ablation surface treatment then under 650～700 ℃ temperature, through spraying, seal mark, is processed into automobile brake sheet again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103040353A CN101592204B (en) | 2009-07-06 | 2009-07-06 | Nonmetallic ceramic automobile brake pad and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103040353A CN101592204B (en) | 2009-07-06 | 2009-07-06 | Nonmetallic ceramic automobile brake pad and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101592204A true CN101592204A (en) | 2009-12-02 |
| CN101592204B CN101592204B (en) | 2011-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430756A (en) * | 2011-12-23 | 2012-05-02 | 太原理工大学 | Method for manufacturing IMC (Intermetallic Compound) silicon nitride ceramic-based composite brake pad |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430756A (en) * | 2011-12-23 | 2012-05-02 | 太原理工大学 | Method for manufacturing IMC (Intermetallic Compound) silicon nitride ceramic-based composite brake pad |
| CN102430756B (en) * | 2011-12-23 | 2013-01-23 | 太原理工大学 | Method for manufacturing IMC (Intermetallic Compound) silicon nitride ceramic-based composite brake pad |
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