CN103627936B - A kind of brake flange carbon fiber reinforced magnesium-base composite material and preparation method - Google Patents
A kind of brake flange carbon fiber reinforced magnesium-base composite material and preparation method Download PDFInfo
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Abstract
The present invention relates to magnesium alloy brake disc, particularly a kind of brake flange carbon fiber reinforced magnesium-base composite material and preparation method.Described brake flange carbon fiber reinforced magnesium-base composite material adopts magnesium-aluminum-zinc-manganese system Magnuminium as matrix, using other carbon fiber of micro/nano level as the wild phase of magnesium-base alloy material, is prepared from by the method for melt synthesis-die cast.Compared with prior art, by fibre reinforced, improve fatigue performance and the abrasion resistance properties of magnesium base alloy material, frictional coefficient is high, and braking effect is good, long service life, can be applicable to the brake flange of various Motor vehicles in the present invention.
Description
Technical field
The present invention relates to magnesium alloy brake disc, particularly a kind of brake flange carbon fiber reinforced magnesium-base composite material and preparation method.
Background technology
Current, brake flange material is based on cast iron (steel) material, the maximum drawback of cast iron brake flange is that heat radiation is slow, easily cause brake disc temperature too high when brake or long-time brake at high speeds, and then cause frictional force reduce and cause brake failure, therefore the brake flange adopting light alloy material is needed for the brake flange of high-speed rail transportation instrument as lightweight automobile, light rail etc.; In light alloy, the magnesium alloy intensity that compares is the highest, specific rigidity close to aluminium alloy and steel, particularly magnesium alloy be hit load time, absorb energy Ratios aluminium alloy height about 50%, there is good antidetonation noise abatement performance; As braking disc, the brake flange of magnesium alloy material is than the rapid heat dissipation about four times of cast iron brake disk, effectively can reduce the frictional heat accumulation because braking procedure produces, greatly can improve the hot braking ability of automobile, shorten braking distance, extend the brake flange life-span, the brake flange of the brake flange weight ratio cast iron quality of magnesium alloy can alleviate more than 70%, solve the problems such as existing cast iron brake disk wears no resistance, radiating effect is bad, quality is large, the decay of frictional force high-temperature hot, become the renewal product of cast iron brake disk.
But magnesium alloy is made brake flange material and is also had weak point, is mainly reflected in: 1) corrosion resistance aspect is poorer than aluminium alloy; 2) brake flange of magnesium alloy material still has much room for improvement in intensity, hardness, wear resistance, antifatigue etc.; In prior art, to the corrosion resistance aspect improving magnesium alloy, to add some erosion-resisting element, but adding of these elements, the raising of many-sided performance such as magnesium alloy strength, antifatigue can be affected; For improving the intensity of magnesium alloy, hardness and wear resistance aspect, namely particle reinforced magnesium base compound material is prepared at present to add wild phase particle, at present, the outstanding problem that particle reinforced magnesium base compound material is used for braking disc is because Particle Phase volume fraction is large, dispersing uniformity is poor, causes the stability of the performances such as the intensity of material, wear resistance and antifatigue to need to improve, moreover, particulates reinforcements is generally oxide compound or ceramic phase particles, can reduce the heat conductivility of brake flange.
In sum, for Magnuminium as braking disc material, need to improve erosion resistance, thermal conductivity, improve the performance of the aspects such as the intensity of magnesium alloy materials, hardness, wear resistance, antifatigue simultaneously, these needs introduce new compound phase on the basis of Magnuminium, namely invent a kind of novel Magnuminium matrix material.
Summary of the invention
The object of this invention is to provide a kind of brake flange carbon fiber reinforced magnesium-base composite material and preparation method, by on Magnuminium basis, introduce carbon fiber-reinforced phase, improve the erosion resistance of Magnuminium, and while the performances such as raising magnesium base alloy material intensity, hardness, wear resistance, antifatigue, improve the heat conductivility of material, solve the key issue that current Magnuminium exists as braking disc.
The object of the invention is to be realized by following scheme:
A kind of brake flange carbon fiber reinforced magnesium-base composite material, it is characterized in that: described brake flange carbon fiber reinforced magnesium-base composite material adopts magnesium-aluminum-zinc-manganese system Magnuminium as matrix, using other carbon fiber of micro/nano level as the wild phase of magnesium-base alloy material, be prepared from by the method for melt synthesis-die cast.
Specifically:
1) magnesium matrix alloying constituent used calculates according to mass percent and is: aluminium (Al) 8.0-9.0, zinc (Zn) 0.50-0.90, manganese (Mn) 0.20-0.40, copper (Cu) 0.001-0.025, nickel (Ni) 0-0.001, iron (Fe) 0-0.004, surplus is magnesium (Mg).
2) scale feature of other carbon fiber of micro/nano level used is, diameter is in the scope of 1-100nm, and the ratio of staple length and Fibre diameter is within the scope of 1-100.
3) micro-nano carbon fiber add-on is the 0.3-3% of magnesium-aluminum-zinc-manganese system Magnuminium quality.
The preparation process feature of brake flange carbon fiber reinforced magnesium-base composite material of the present invention divides following steps:
A, carbon fiber fully mix with magnesium powder, briquetting under vacuo, prepare the magnesium matrix body of carbon fiber-containing, it is to be noted when preparing the magnesium matrix body of carbon fiber-containing, carbon fiber and metal magnesium powder are in mass ratio in the scope of 1:10-1:2, vacuum level requirements gaseous tension required for briquetting is no more than 0.01Pa, and the pressure required for briquetting is 4 × 10
3kg/m
2, obtained briquetting is of a size of 2 × 2 × 2cm
3-4 × 4 × 4cm
3;
The melting of b, magnesium matrix alloy, adjustment aluminium, zinc, manganese, copper, iron, nickel composition are to specialized range;
The temperature of c, magnesium matrix alloy controls at 600 DEG C-650 DEG C, adds the magnesium matrix body block of carbon fiber-containing, adopts non-contact type induction stirring, and die cast after fusing evenly, obtains brake flange carbon fiber reinforced magnesium-base composite material of the present invention.
The present invention compared with prior art, has the following advantages:
1) brake flange carbon fiber reinforced magnesium-base composite material of the present invention is compared with the brake flange of cast iron (steel) material, and weight saving 70-80%, realizes lightweight; Meanwhile, carbon fiber reinforced magnesium base composite material heat conductivility improves, and frictional coefficient improves, and shortens braking distance, extends brake flange work-ing life.
2) the present invention is compared with the aluminum alloy material brake flange that current lightweight automobile uses, not only quality is lighter, and more guaranteed in intensity, hardness, wear resistance, in particular improve the impulse fatigue resistance energy of brake flange, to vibration-damping noise-reducing, improve work-ing life all helpful.
3) the present invention is compared with the brake flange of the light metal-based composite material quality of existing particle reinforce, considerably reduce the ratio of wild phase, overcome a large amount of particle and there is the problem that the reunion that causes causes, simultaneously, carbon fiber is compared with particulates reinforcements, because particulates reinforcements belongs to ceramic phase, the frictional coefficient of impact heat radiation and material, and fibre reinforced phase of the present invention, have and improve matrix material thermal conductivity, the radiating effect of brake flange can be improved, guarantee brake process dispels the heat, thus ensure the stable of braking quality, shorten braking distance, avoid brake failure problem.
Therefore, the present invention compared with prior art, pass through fibre reinforced, improve the erosion resistance of material, thermal conductivity, the strength of materials, hardness, fatigue performance and abrasion resistance properties are also had clear improvement simultaneously, braking effect is good, long service life, can be applicable to the brake flange of various Motor vehicles.
Embodiment
embodiment 1
1) chemical composition (quality %) of the magnesium matrix alloy adopted is:
Aluminium 8.0, zinc 0.50, manganese 0.40, copper 0.01, nickel 0.001, iron 0.002, surplus is magnesium 91.087;
2) scale feature of carbon fiber used is, diameter is in the scope of 1-10nm, and the ratio of staple length and Fibre diameter is within the scope of 1-100; The add-on of micro-nano carbon fiber is 0.3%;
Implementation step is:
The ratio of a, carbon fiber and metal magnesium powder 1:9 in mass ratio fully mixes, and briquetting in vacuum briquetting press, is prepared into the magnesium matrix body of carbon fiber-containing; During briquetting, vacuum tightness is 0.01Pa, and pressure during briquetting is 4 × 10
3kg/m
2, obtained briquetting is of a size of 4 × 4 × 4cm
3;
The melting of b, magnesium matrix alloy, adjustment aluminium, zinc, manganese, copper component are to prescribed value, and namely chemical compositions by percentage is: aluminium 8.0, zinc 0.50, manganese 0.40, copper 0.01, nickel 0.001, iron 0.002, and surplus is magnesium 91.087;
The temperature of c, magnesium matrix alloy controls at 610 DEG C, add the magnesium matrix body of carbon fiber-containing, the add-on of magnesium matrix body is 3% of Magnuminium melt quality mark, adopt induction stirring 2min, fusing evenly can be cast, and die cast obtains brake flange carbon fiber reinforced magnesium-base composite material of the present invention.
embodiment 2
1) chemical composition (quality %) of the magnesium matrix alloy adopted is:
Aluminium 9.0, zinc 0.90, manganese 0.20, copper 0.025, iron 0.001, surplus is magnesium 89.874;
2) scale feature of carbon fiber used is, diameter is in the scope of 1-100nm, and the ratio of staple length and Fibre diameter is within the scope of 1-100; The add-on of micro-nano carbon fiber is 3%;
Implementation step is:
The ratio of a, carbon fiber and metal magnesium powder 3:7 in mass ratio fully mixes, and briquetting in vacuum briquetting press, is prepared into the magnesium matrix body of carbon fiber-containing; During briquetting, vacuum tightness is 0.01Pa, and pressure during briquetting is 4 × 10
3kg/m
2, obtained briquetting is of a size of 3 × 3 × 3cm
3;
The melting of b, magnesium matrix alloy, adjustment aluminium, zinc, manganese, copper component are to prescribed value, and namely chemical compositions by percentage is: aluminium 9.0, zinc 0.90, manganese 0.20, copper 0.025, iron 0.001, and surplus is magnesium 89.874;
The temperature of c, magnesium matrix alloy controls at 650 DEG C, add the magnesium matrix body of carbon fiber-containing, the add-on of magnesium matrix body is 10% of Magnuminium melt quality mark, adopt induction stirring 5min, fusing evenly can be cast, and die cast obtains brake flange carbon fiber reinforced magnesium-base composite material of the present invention.
embodiment 3
1) chemical composition (quality %) of the magnesium matrix alloy adopted is:
Aluminium 8.5, zinc 0.70, manganese 0.30, copper 0.010, iron 0.0005, surplus is magnesium 90.4895;
2) scale feature of carbon fiber used is, diameter is in the scope of 1-100nm, and the ratio of staple length and Fibre diameter is within the scope of 1-100; The add-on of micro-nano carbon fiber is 1.5%;
Implementation step is:
The ratio of a, carbon fiber and metal magnesium powder 3:7 in mass ratio fully mixes, and briquetting in vacuum briquetting press, is prepared into the magnesium matrix body of carbon fiber-containing; During briquetting, vacuum tightness is 0.01Pa, and pressure during briquetting is 4 × 10
3kg/m
2, obtained briquetting is of a size of 2 × 2 × 2cm
3;
The melting of b, magnesium matrix alloy, adjustment aluminium, zinc, manganese, copper component are to prescribed value, and namely chemical compositions by percentage is: aluminium 8.5, zinc 0.70, manganese 0.30, copper 0.010, iron 0.0005, and surplus is magnesium 90.4895;
The temperature of c, magnesium matrix alloy controls at 630 DEG C, add the magnesium matrix body of carbon fiber-containing, the add-on of magnesium matrix body is 5% of Magnuminium melt quality mark, adopt induction stirring 3min, fusing evenly can be cast, and die cast obtains brake flange carbon fiber reinforced magnesium-base composite material of the present invention.
Mechanical Property Analysis is carried out to carbon fiber reinforced magnesium-base composite material prepared by embodiment 1-3, and carrying out contrasting (comparative example 1) with material property prepared by high-silicon aluminium-silicon alloy material with in prior art under the identical state of other conditions, the composition of the high-silicon aluminium-silicon alloy that comparative example adopts is: silicon 17-35%, copper 1-3%, magnesium 0.3-2%, nickel or chromium 1-2%, and surplus is aluminium; Simultaneously by the alloy in above-mentioned three embodiments, when not adding carbon fiber, also as a comparison case (comparative example 2-4), the alloying constituent of comparative example 1-4 employing is in table 1
The alloying constituent (quality %) of table 1 comparative example
| Aluminium | Copper | Silicon | Iron | Zinc | Nickel | Tin | Magnesium | |
| Comparative example 1 | Surplus | 2 | 30 | - | 1.5 | - | 1 | |
| Comparative example 2 | 8.0 | 0.01 | - | 0.002 | 0.50 | 0.001 | - | Surplus |
| Comparative example 3 | 9.0 | 0.025 | - | 0.001 | 0.90 | - | - | Surplus |
| Comparative example 4 | 8.5 | 0.010 | - | 0.0005 | 0.70 | - | - | Surplus |
Note: "-" represents no this item.
The performance of brake flange material prepared by embodiments of the invention and the comparative result of comparative example are in table 2.
Table 2 performance comparison result
| Performance | Hardness/(HBS) | Tensile strength/(MPa) | Unit elongation/(%) | Young's modulus/(kMPa) | Braking distance under 100km/h |
| Embodiment 1 | 170 | 488 | 4.8 | 108 | 19.4m |
| Embodiment 2 | 172 | 486 | 5.2 | 119 | 20.1m |
| Embodiment 3 | 175 | 492 | 5.3 | 116 | 19.6m |
| Comparative example 1 | 89 | 240 | 2.9 | 80 | 21.5 |
| Comparative example 2 | 98 | 279 | 3.1 | 51 | 22.3 |
| Comparative example 3 | 99 | 284 | 2.9 | 50.5 | 22.1 |
| Comparative example 4 | 98 | 280 | 3.0 | 51.5 | 22.6 |
From above comparing result:
The present invention is compared with use aluminum base alloy, Magnuminium in prior art, the hardness of material, tensile strength, the mechanical performance index such as unit elongation and Young's modulus all increase substantially, particularly intensity and unit elongation improve about 40-50%, material hardness also significantly improves about 60%, the braking distance under equal working conditions of prepared brake flange shortens, and doubles left and right its work-ing life.
Claims (1)
1. a brake flange carbon fiber reinforced magnesium-base composite material, it is characterized in that: described brake flange carbon fiber reinforced magnesium-base composite material adopts magnesium-aluminum-zinc-manganese system Magnuminium as matrix, using other carbon fiber of micro/nano level as the wild phase of magnesium-base alloy material, be prepared from by the method for melt synthesis-die cast;
The alloying constituent of described matrix calculates according to mass percent and is: aluminium (Al) 8.0-9.0, zinc (Zn) 0.50-0.90, manganese (Mn) 0.20-0.40, copper (Cu) 0.001-0.025, nickel (Ni) 0-0.001, iron (Fe) 0-0.004, surplus is magnesium (Mg);
The scale feature of described other carbon fiber of micro/nano level is: diameter is in the scope of 1-100nm, and the ratio of staple length and Fibre diameter is within the scope of 1-100;
Described micro-nano carbon fiber add-on is the 0.3-3% of magnesium-aluminum-zinc-manganese system Magnuminium quality;
The preparation method of described brake flange carbon fiber reinforced magnesium-base composite material, comprises the steps:
(1) carbon fiber fully mixes with magnesium powder, under vacuo briquetting, prepares the magnesium matrix body of carbon fiber-containing;
(2) melting of magnesium matrix alloy, the composition of adjustment aluminium, zinc, manganese, copper, iron, nickel is to specialized range;
(3) temperature of magnesium matrix alloy controls at 600 DEG C-650 DEG C, adds the magnesium matrix body of carbon fiber-containing, adopts induction stirring, and die cast after fusing evenly, obtains described brake flange carbon fiber reinforced magnesium-base composite material;
Described carbon fiber and metal magnesium powder are in mass ratio in the scope of 1:10-1:2, and the vacuum level requirements gaseous tension required for briquetting is no more than 0.01Pa, and the pressure required for briquetting is 4 × 10
3kg/m
2, obtained briquetting is of a size of 2 × 2 × 2cm
3-4 × 4 × 4cm
3.
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| CN103627936B true CN103627936B (en) | 2016-03-02 |
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| CN105986204A (en) * | 2016-01-06 | 2016-10-05 | 安徽祈艾特电子科技股份有限公司 | Carbon-nanofiber-modified Mg-Al-Zn magnesium alloy material for casting automobile parts and preparation method of material |
| CN107523727A (en) * | 2016-06-20 | 2017-12-29 | 张家港市华舰五金工具有限公司 | Magnesium-based composite material doped with carborundum and preparation method thereof |
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| CN106399878B (en) * | 2016-11-07 | 2019-03-15 | 威海市金贝壳新材料有限公司 | A kind of carbon fiber reinforced magnesium-base composite material, preparation system and method |
| CN107604272A (en) * | 2017-09-19 | 2018-01-19 | 安徽恒利增材制造科技有限公司 | A kind of magnesium alloy ingot and preparation method thereof |
| CN108048765A (en) * | 2017-12-22 | 2018-05-18 | 芜湖环瑞汽车内饰件有限公司 | A kind of automotive upholstery production magnesium alloy materials and preparation method thereof |
| CN108588591B (en) * | 2018-05-17 | 2020-10-30 | 沈阳工业大学 | Method for preparing short carbon fiber reinforced metal matrix composite material by mechanical combination and electromagnetic stirring |
| CN108486507A (en) * | 2018-06-27 | 2018-09-04 | 赵云飞 | A kind of carbon fiber reinforced magnesium-base alloy material and preparation method thereof |
| CN110172652A (en) * | 2019-06-17 | 2019-08-27 | 江仁燕 | A kind of chopped carbon fiber enhancing Mg-Al-Li system alloy-base composite material |
| CN110373616A (en) * | 2019-07-02 | 2019-10-25 | 南昌大学 | A kind of preparation method of strontium and carbon fiber collaboration enhancing magnesium-based composite material |
| CN111043203B (en) * | 2020-01-12 | 2021-06-11 | 安徽飞鹰汽车零部件股份有限公司 | Automobile brake pad adopting carbon fiber reinforced composite material |
| CN112941358B (en) * | 2021-01-11 | 2022-05-20 | 南昌大学 | Preparation method of graphene-reinforced Mg-Al-Zn alloy |
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| JPS613864A (en) * | 1984-06-15 | 1986-01-09 | Toyota Motor Corp | Carbon fiber reinforced magnesium alloy |
| EP1195448A1 (en) * | 1999-05-14 | 2002-04-10 | Hiroji Oishibashi | Production method for magnesium alloy member |
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|---|---|---|---|---|
| JPS613864A (en) * | 1984-06-15 | 1986-01-09 | Toyota Motor Corp | Carbon fiber reinforced magnesium alloy |
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Effective date of registration: 20200305 Address after: 223700 No. 210, Taihu Road, Siyang Economic Development Zone, Suqian, Jiangsu Patentee after: SIYANG MINGYUXING PRECISION MACHINERY Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University |