CN102562878A - Manufacturing method for automobile brake disc or brake hub - Google Patents
Manufacturing method for automobile brake disc or brake hub Download PDFInfo
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- CN102562878A CN102562878A CN2011104622325A CN201110462232A CN102562878A CN 102562878 A CN102562878 A CN 102562878A CN 2011104622325 A CN2011104622325 A CN 2011104622325A CN 201110462232 A CN201110462232 A CN 201110462232A CN 102562878 A CN102562878 A CN 102562878A
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- brake disc
- brake
- hub
- ceramic powder
- braking hub
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Abstract
The invention discloses a manufacturing method for an automobile brake disc or brake hub. The manufacturing method includes the steps of distributing, melting, slag removal, casting, cooling forming and the like. Ceramic powder or ceramic fiber is added into molten iron after slag removal, and the molten iron is uniformly stirred after continuing to be heated until the ceramic powder or ceramic fiber is melted. The brake disc or brake hub manufactured by adding a proper amount of the ceramic fiber or ceramic powder has the advantages of weak heat conductivity, low heat transfer capacity and the like. When instant temperature is generated in brake, heat cannot be immediately transferred to the whole brake disc or brake hub, and the temperature of other positions of the brake disc or brake hub is low, so that the friction coefficient of the surface of the brake disc or brake hub cannot be decreased, and brake effects cannot be reduced or lost. Therefore, the technical scheme requiring protection has outstanding substantial advantages and remarkable progress.
Description
Technical field
The present invention relates to a kind of production method, specifically, relate to the production method of a kind of automobile brake disc or braking hub.
Background technique
In the braking system of automobile, brake disc or braking hub are one of safe component of most critical, and the quality of brake disc, braking hub quality can directly have influence on the braking ability of automobile brake assembly.Brake disc is made up of steel plate, bonding thermal-protective coating and brake pad, and it is next antirust that steel plate will pass through application, and thermal-protective coating is made up of adiabatic material, and purpose is heat insulation.Brake pad is made up of friction material, tackiness agent, is compressed in during braking on brake disc or the braking hub and produces friction, thereby reach the purpose of vehicle deceleration brake.Because rubbing action, brake pad can be worn gradually, will in time change brake disc or braking hub after friction material uses, otherwise steel plate will directly contact with brake disc, finally can lose braking effect and damage brake disc.
Automobile is in braking process, and brake disc, braking hub not only bear very big frictional force, torsion, also will bear the moment high temperature that produces because of friction; At high temperature; The friction factor on brake disc or braking hub surface reduces, and braking effect is poor, the for example original braking of in several meters, accomplishing; Can perhaps could accomplish in the longer distance at ten meters; The heavy goods vehicle that particularly goes in the perhaps continuous descending highway section of rugged mountain path, the growth of stopping distance means that the probability that serious accident takes place can increase greatly.
At present, the brake disc that is adopted on the market is steel brake disc or braking hub, promptly after casting, is reprocessed into brake disc or braking hub with steel material, and there are many shortcomings in this brake disc or braking hub:
A) wear-resisting property is poor, and working life is short;
B) resistance to high temperature is poor;
C) heat conduction is fast, and is yielding.
The patent of invention of the patent No. " 200410051611.5 ", denomination of invention " a kind of car brake disc and production method thereof " discloses a kind of brake disc and production method, and wherein the material of brake disc adopts silicon nitride ceramic material; Have higher wear-resisting and resistance to high temperature, but this brake disc quality is crisp, fragile; Dawn damages; Can't repair, and manufacturing process is different fully with the manufacturing process of original brake disc, makes this brake disc and need change original foundry equipment; So invest greatlyyer, using scope receives certain restriction.
Summary of the invention
The technical problem that the present invention will solve is to overcome above-mentioned defective; The production method of a kind of automobile brake disc or braking hub is provided; Brake disc that this method makes or braking hub have wear-resisting and resistant to elevated temperatures characteristic; Can not only increase the working life of brake disc or braking hub, and this production method step is simple, enforcement is convenient, little, the instant effect of investment.
For addressing the above problem, the technological scheme that the present invention adopted is:
The production method of a kind of automobile brake disc or braking hub, said production method may further comprise the steps:
A, batching are chosen gray cast iron G3000;
B, fusing are heated to fusing with gray cast iron G3000 or the raw material of producing gray cast iron G3000, form molten iron, continue to be heated to more than 1400 ℃;
The waste residue in the molten iron is removed in C, slagging-off;
D, casting are watered molten iron to the die cavity sand mo(u)ld of brake disc or braking hub;
Take out behind E, the cooling forming;
It is characterized in that: behind molten iron deslagging, add ceramic powder or ceramic fiber, continue to be heated to stirring after ceramic powder or ceramic fiber melt.
As a kind of improvement:
Said ceramic powder or ceramic fiber weight percentage are 6 ‰～9 ‰.
Said ceramic powder or ceramic fiber weight percentage are 8 ‰.
As further improvement:
The temperature that heats among the said step B is 1420 ℃～1480 ℃.
The temperature that heats among the said step B is 1450 ℃.
Adding ceramic fiber or ceramic powder is an important technology characteristic of the present invention.Ceramic fiber is a kind of fibrous light refractory material; Have in light weight, high temperature resistant, good thermal stability, heat conductivity is low, specific heat is little and advantage such as anti-mechanical shock; Ceramic powder has the characteristic same with ceramic fiber, and ceramic powder is Powdered, and ceramic fiber is fibrous.
Chemical composition among the gray cast iron G3000 has: carbon (C) 3.10～3.50%, silicon (Si) 1.60～2.10%, manganese (Mn) 0.60～1.00%, phosphorus (P)＜0.120%, sulphur (S)＜0.120, copper (Cu) 0.15～0.45%, chromium (Cr) 0.05～0.25%, aluminium (Al)＜0.012%, carbon and silicon equivalent (CE) 3.70～4.20%, all the other are iron (Fe).These chemical compositions have guaranteed the mechanical property of G3000, and the tensile strength that makes gray cast iron G3000 is more than or equal to 230N/m m
2, hardness is between HBl80-220.
The hardness of brake disc or braking hub required material can not be too high, too highly when braking, can send sound, and braking effect is poor; The hardness of material is too low, and brake disc or braking hub are worn easily, and working life is short, so the most suitable manufacturing brake disc of the material of hardness between HB180-220 or braking hub.
In the gray cast iron G3000 of fusing, add an amount of ceramic fiber or ceramic powder; Brake disc that makes or braking hub not only can not change original mechanical property; And since the melting point of ceramic fiber or ceramic powder more than 1400 ℃; Also improved brake disc or braking hub fusing point, the maximum temperature that brake disc or braking hub can be born is brought up to more than 1400 ℃.
The ratio that adds ceramic powder or ceramic fiber is another important techniques characteristic of the present invention; This ratio is to draw through creative work; And through the several times experiment confirm; Through adding brake disc or the braking hub that the ratio described in the present invention makes, can keep the original mechanical performance, improved the high-temperature stability of brake disc or braking hub again.
The ratio that adds ceramic fiber or ceramic powder is excessive, and brake disc that then makes or braking hub poor plasticity influence its original mechanical property, and be fragile, and expense is higher; The ratio that adds ceramic fiber or ceramic powder is too small, and the wear resistance and the heat-resisting quantity of brake disc that makes or braking hub are poor, does not reach the technical requirements of braking.
The present invention adds brake disc or the braking hub that an amount of ceramic fiber or ceramic powder make; Have thermal conductivity weak, transmit the little characteristics of heat ability; When braking generation moment high temperature; Heat can not be delivered to whole brake disc or braking hub immediately, makes the temperature at brake disc or braking hub other position lower, thereby guarantees its surperficial friction factor can not diminish and reduce or lose braking effect.So the present invention's technological scheme required for protection has outstanding substantive distinguishing features and obvious improvement.
Test one
Choose on the automobile of same model, testing that same 20 common brake discs (P), silicon nitride ceramics brake disc (D), the present invention make respectively.Record test data shown in table one.
Table one
| Index/title | Common brake disc (P) | Silicon nitride ceramics brake disc (D) | Brake disc of the present invention (F) |
| Working life (year) | 0.8～1 | 2～3 | 3～4 |
| Hardness (HB) (N/m m 2) | 160 | 250 | 200 |
| Thermal conductivity (λ) (W/ (m (℃)) | 12.1 | 2.0 | 3.6 |
| Spoilage in 1 year (%) | 83.2 | 51.5 | 10.1 |
From table one data, can find out; Common brake disc (P) is compared with silicon nitride ceramics brake disc (D), brake disc of the present invention (F) has tangible gap; And silicon nitride ceramics brake disc (D) is compared with brake disc of the present invention (F), working life, tensile strength (σ) and in 1 year spoilage all not as good as brake disc of the present invention (F), because the hardness of silicon nitride ceramics brake disc (D) is high, quality is crisp; So fragile, the spoilage in 1 year is higher.The hardness of brake disc of the present invention (F) is not high, but more wear-resisting than common brake disc (P), thermal conductivity is also relatively low, thereby has heat-resisting quantity.
Test two
Choose 50 of the brake discs that the present invention makes, be equally divided into five groups, on the automobile of same model, test.The difference part of every group of brake disc is the percentage difference that ceramic fiber or ceramic powder add, and the ceramic fiber of five groups of brake disc addings or the percentage of ceramic powder are respectively: 5 ‰, 6 ‰, 8 ‰, 9 ‰ and 12 ‰.The test data that records is shown in table two.
Table two
| Index/group | One group | Two groups | Three groups | Four groups | Five groups |
| Working life (year) | 2.5 | 3 | 4.5 | 3.5 | 4 |
| Hardness (HB) (N/m m 2) | 170 | 180 | 200 | 220 | 260 |
| Thermal conductivity (λ) (W/ (m (℃)) | 8.1 | 4.5 | 3.5 | 3.2 | 2.8 |
| Spoilage in 1 year (%) | 12 | 10 | 8 | 9 | 11 |
See from testing two test result; Along with the continuous increase of ceramic fiber or ceramic powder ratio, its hardness becomes greatly successively, and thermal conductivity diminishes successively; But be to reduce after the existing increase working life; And the spoilage in 1 year reduces earlier afterwards to increase at present, and analyzing each data can draw, and the percentage of ceramic fiber or ceramic powder is best 8 ‰ o'clock effects.
Owing to adopted technique scheme; Brake disc that the present invention makes or braking hub have poor thermal conductivity; The transmission heat is slow, guarantees that the friction factor on brake disc or braking hub surface can not diminish because of localized hyperthermia makes the friction factor on whole surface, has guaranteed braking effect; In addition,, improved brake disc or braking hub high-temperature stability, improved the working life that the braking hub is vitalized in braking greatly because ceramic fiber or ceramic powder have high melt point; Simultaneously, production method step of the present invention is simple, easy construction; Invest little, instant effect, using scope is wide.
Below in conjunction with embodiment the present invention is further specified.
Embodiment
Embodiment 1: a kind of production method of automobile brake disc, choose 992 kilograms gray cast iron G3000 and 8 kilograms ceramic fiber earlier, and again 992 kilograms gray cast iron G3000 is put into electric furnace and be heated to fusing, continue to add the thermosetting molten iron; Remove waste residue, treat that temperature reaches 1400 ℃ after, 8 kilograms ceramic fibers are joined in the molten iron; Continue heating, make temperature be increased to 1450 ℃, after stirring; Be poured in the sand mo(u)ld die cavity, cooling forming finally obtains gained brake disc of the present invention or braking hub.
Embodiment 2: a kind of production method of automobile brake disc, choose 994 kilograms gray cast iron G3000 and 6 kilograms ceramic fiber earlier, and again 994 kilograms gray cast iron G3000 is put into electric furnace and be heated to fusing, continue to add the thermosetting molten iron; Remove waste residue, treat that temperature reaches 1400 ℃ after, 6 kilograms ceramic fibers are joined in the molten iron; Continue heating, make temperature be increased to 1420 ℃, after stirring; Be poured in the sand mo(u)ld die cavity, cooling forming finally obtains gained brake disc of the present invention or braking hub.
Embodiment 3: a kind of production method of automobile brake disc, choose 991 kilograms gray cast iron G3000 and 9 kilograms ceramic powder earlier, and again 991 kilograms gray cast iron G3000 is put into electric furnace and be heated to fusing, continue to add the thermosetting molten iron; Remove waste residue, treat that temperature reaches 1400 ℃ after, 9 kilograms ceramic fibers are joined in the molten iron; Continue heating, make temperature be increased to 1480 ℃, after stirring; Be poured in the sand mo(u)ld die cavity, cooling forming finally obtains gained brake disc of the present invention or braking hub.
Embodiment 4: a kind of production method of automobile brake disc, choose 993 kilograms gray cast iron G3000 and 7 kilograms ceramic powder earlier, and again 993 kilograms gray cast iron G3000 is put into electric furnace and be heated to fusing, continue to add the thermosetting molten iron; Remove waste residue, treat that temperature reaches 1400 ℃ after, 7 kilograms ceramic fibers are joined in the molten iron; Continue heating, make temperature be increased to 1460 ℃, after stirring; Be poured in the sand mo(u)ld die cavity, cooling forming finally obtains gained brake disc of the present invention or braking hub.
In the above-described embodiments; Also can choose the tankage that make gray cast iron G3000 earlier according to a certain percentage; Tankage like carbon (C) 3.10～3.50%, silicon (Si) 1.60～2.10%, manganese (Mn) 0.60～1.00%, copper (Cu) 0.15～0.45%, chromium (Cr) 0.05～0.25% and iron (Fe); Proportionally put into electric furnace, treat to heat again after tankage melt, remove the gred the ceramic fiber or the ceramic powder of attach ratios.
Claims (5)
1. the production method of automobile brake disc or braking hub, said production method may further comprise the steps:
A, batching are chosen gray cast iron G3000;
B, fusing are heated to fusing with gray cast iron G3000 or the raw material of producing gray cast iron G3000, form molten iron, continue to be heated to more than 1400 ℃;
The waste residue in the molten iron is removed in C, slagging-off;
D, casting are watered molten iron to the die cavity sand mo(u)ld of brake disc or braking hub;
Take out behind E, the cooling forming;
It is characterized in that: behind molten iron deslagging, add ceramic powder or ceramic fiber, continue to stir after the fusing of full ceramic powder of heating or ceramic fiber.
2. the production method of a kind of automobile brake disc according to claim 1 or braking hub, it is characterized in that: said ceramic powder or ceramic fiber weight percentage are 6 ‰～9 ‰.
3. the production method of a kind of automobile brake disc according to claim 2 or braking hub, it is characterized in that: said ceramic powder or ceramic fiber weight percentage are 8 ‰.
4. according to the production method of one of them described a kind of automobile brake disc of claim 1 to 3 or braking hub, it is characterized in that: the temperature that heats among the said step B is 1420 ℃～1480 ℃.
5. the production method of a kind of automobile brake disc according to claim 4 or braking hub, it is characterized in that: the temperature that heats among the said step B is 1450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104622325A CN102562878A (en) | 2011-12-12 | 2011-12-12 | Manufacturing method for automobile brake disc or brake hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104622325A CN102562878A (en) | 2011-12-12 | 2011-12-12 | Manufacturing method for automobile brake disc or brake hub |
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| CN102562878A true CN102562878A (en) | 2012-07-11 |
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| CN2011104622325A Pending CN102562878A (en) | 2011-12-12 | 2011-12-12 | Manufacturing method for automobile brake disc or brake hub |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949581A (en) * | 2014-04-04 | 2014-07-30 | 繁昌县金科机电科技有限公司 | Production method of automobile brake disc |
| CN112157403A (en) * | 2020-09-23 | 2021-01-01 | 中车戚墅堰机车车辆工艺研究所有限公司 | Preparation method for preparing aluminum matrix composite brake disc |
| CN113664481A (en) * | 2021-09-23 | 2021-11-19 | 广东洪裕智能制造研究院有限公司 | Manufacturing and process of ceramic ventilation brake hub based on light weight |
Citations (7)
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| CN1217048A (en) * | 1996-05-02 | 1999-05-19 | 陶氏化学公司 | Ceramic metal composite brake components and the mfg. method |
| US6271162B1 (en) * | 1997-02-20 | 2001-08-07 | Daimlerchrysler Ag | Method for producing ceramic-metal composite bodies, ceramic-metal composite bodies and their use |
| CN1755159A (en) * | 2004-09-27 | 2006-04-05 | 王敬东 | Sedan brake disk and its manufacturing method |
| US20070023242A1 (en) * | 2005-07-05 | 2007-02-01 | Daimlerchrysler Ag | Composite brake disk |
| CN101063471A (en) * | 2006-04-25 | 2007-10-31 | 湘潭高耐合金制造有限公司 | Method for manufacturing brake disk mounted on axis |
| CN101191178A (en) * | 2006-11-25 | 2008-06-04 | 遵义市北辰技贸有限责任公司 | Formulation and technique for casting high-strength automobile brake wheel hub |
| CN101818296A (en) * | 2010-04-20 | 2010-09-01 | 福建畅丰车桥制造有限公司 | Process for casting brake drum |
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2011
- 2011-12-12 CN CN2011104622325A patent/CN102562878A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217048A (en) * | 1996-05-02 | 1999-05-19 | 陶氏化学公司 | Ceramic metal composite brake components and the mfg. method |
| US6271162B1 (en) * | 1997-02-20 | 2001-08-07 | Daimlerchrysler Ag | Method for producing ceramic-metal composite bodies, ceramic-metal composite bodies and their use |
| CN1755159A (en) * | 2004-09-27 | 2006-04-05 | 王敬东 | Sedan brake disk and its manufacturing method |
| US20070023242A1 (en) * | 2005-07-05 | 2007-02-01 | Daimlerchrysler Ag | Composite brake disk |
| CN101063471A (en) * | 2006-04-25 | 2007-10-31 | 湘潭高耐合金制造有限公司 | Method for manufacturing brake disk mounted on axis |
| CN101191178A (en) * | 2006-11-25 | 2008-06-04 | 遵义市北辰技贸有限责任公司 | Formulation and technique for casting high-strength automobile brake wheel hub |
| CN101818296A (en) * | 2010-04-20 | 2010-09-01 | 福建畅丰车桥制造有限公司 | Process for casting brake drum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949581A (en) * | 2014-04-04 | 2014-07-30 | 繁昌县金科机电科技有限公司 | Production method of automobile brake disc |
| CN112157403A (en) * | 2020-09-23 | 2021-01-01 | 中车戚墅堰机车车辆工艺研究所有限公司 | Preparation method for preparing aluminum matrix composite brake disc |
| CN113664481A (en) * | 2021-09-23 | 2021-11-19 | 广东洪裕智能制造研究院有限公司 | Manufacturing and process of ceramic ventilation brake hub based on light weight |
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Application publication date: 20120711 |