CN104213055B - A kind of copper carbon fiber strengthens aluminum magnesium alloy matrix material and preparation method thereof - Google Patents
A kind of copper carbon fiber strengthens aluminum magnesium alloy matrix material and preparation method thereof Download PDFInfo
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- CN104213055B CN104213055B CN201410467569.9A CN201410467569A CN104213055B CN 104213055 B CN104213055 B CN 104213055B CN 201410467569 A CN201410467569 A CN 201410467569A CN 104213055 B CN104213055 B CN 104213055B
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Abstract
The invention discloses a kind of copper carbon fiber and strengthen aluminum magnesium alloy matrix material and preparation method thereof.This matrix material is formed by copper carbon fiber and al-mg alloy powder mixed sintering, copper carbon fiber volume fraction content 1 ~ 10%.Preparation method of the present invention mainly comprises the copper facing of carbon fiber, ball mill mixing and vacuum heating-press sintering.By regulating and controlling the volume fraction of copper carbon fiber, the density of aluminum magnesium alloy can be reduced, promoting the intensity of aluminum magnesium alloy, toughness improve its anisotropy, when mechanical property close to, alleviate more than 5% than conventional aluminium magnesium alloy density.The present invention is specially adapted to require that material has the good aircraft component of lightweight, high strength, over-all properties.
Description
Technical field
The present invention relates to the preparation field of metal-base composites, a kind of copper carbon fiber strengthens aluminum magnesium alloy matrix material and preparation method thereof specifically.
Background technology
Along with expanding economy, the field products such as aerospace, track traffic, electron device increase day by day to the demand of lightweight, high strength composite, and the consumption of matrix material and performance level thereof have become one of important symbol of aircraft advance.
Aluminum magnesium alloy has good intensity, hardness, thermal diffusivity, crushing resistance, corrosion stability and weldability, be widely used in the fields such as aerospace, electric, track traffic, building, and have broad application prospects in fields such as the energy, daily necessities, stationery sports goodss.
The density 1.732g/cm of magnesium
3, be very important Addition ofelements in aluminium alloy.Appropriate magnesium elements adds in aluminium can form disperse phase, can significantly improve alloy strength, hardness and wear resistance, its plasticity can not be made again too to reduce simultaneously.Research shows the magnesium often increasing 1wt% in aluminium, and intensity can be made to improve about 35MPa.Magnesium limit of solubility in aluminium is 14.9wt%, and when Mg content is less than 5wt%, all solid solution is in the base substantially.When Mg content is higher, in aluminum magnesium alloy, Al can be separated out
2o
3and Al
5mg
8, the potential difference between this two-phase and matrix is comparatively large, and alloy corrosion resistance can be made to decline.Thus, the Mg content in aluminum magnesium alloy is generally lower than 10wt%, and the conventional trade mark is lower than 8wt%.The aluminum magnesium alloy of low Mg content has excellent forming property and erosion resistance, and the aluminum magnesium alloy of high Mg content has good castability and high strength.At present, in conventional aluminum magnesium alloy, the content of magnesium is generally no more than 6wt%.
Because aluminum magnesium alloy has huge market potential, be day by day subject to the attention of industrial community and academia, but its forming property is relative with strength property poor.Be difficult to carry out the shaping of complicated shape and obtain the structural parts of high strength, therefore, its forming property and strength property become the main restricting factor manufacturing complexity, high-strength aluminum-magnesium alloy product.
For further weight reduction, adopt lightweight, the main trend of the advanced composite material of high strength to be effective method be also the outer aircraft manufacturing of Present Domestic.
In view of the over-all properties of high magnesium content A1-Mg binary alloy is poor, usual needs on binary alloy basis separately or compound add the alloying elements such as Cu, Zr, Zn, Mn, Ag, thus form multiple strengthening phase, and change quantity and the distribution of strengthening phase, reach the object improving its performance.By adding trace alloying element and the performance such as toughness, intensity of aluminum magnesium alloy can be significantly improved in conjunction with thermal treatment, hot-working process in aluminum magnesium alloy.
Carbon fiber is a kind of thermotolerance, solidity to corrosion is good and density is lower, the functional fiber material that specific tenacity is higher.Carbon Fibre Reinforced Metal Matrix Composites not only has lower density, good intensity and wear resistance, and there is the features such as excellent conduction, thermal conductivity, fatigue resistance, electromagnetic wave shielding, thus it is widely used in the fields such as automobile, track traffic, aerospace.But research finds that the interface wetting property of carbon fiber and aluminum magnesium alloy matrix is poor, therefore, in prior art, do not strengthen the precedent of aluminum magnesium alloy matrix strength with carbon fiber.
Summary of the invention
For solving the problem of the interface wetting property difference of carbon fiber and aluminum magnesium alloy matrix, the invention provides a kind of copper carbon fiber and strengthen aluminum magnesium alloy matrix material and preparation method thereof, improve carbon fiber and Al-alloy based body interface wetting property, and inhibit surface reaction therebetween, thus make it possible to use carbon fiber to strengthen aluminum magnesium alloy, to fall low-alloyed density, improve toughness and the anisotropy of alloy, improve the intensity of aluminum magnesium alloy, expand the application space of aluminum magnesium alloy.
The present invention is the technical scheme solving the problems of the technologies described above employing: a kind of copper carbon fiber strengthens aluminum magnesium alloy matrix material, by particle diameter to be the aluminium-magnesium alloy powder of 10-15 micron and volume fraction thereof be 1 ~ 10% copper carbon fiber make, wherein, according to weight percent, the moiety of aluminium-magnesium alloy powder be 10 ~ 40% Mg, 0.2 ~ 0.5% Cu, 0.1 ~ 0.4% Mn, Si, the Cr of 0.1 ~ 0.3% of 0.5 ~ 0.8%, Ti and Al of Zn, 0.1-0.5% of 0.1 ~ 0.5% and inevitable impurity;
Described copper carbon fiber is obtained by the mode of electroless plating in the carbon fiber immersion plating solution of diameter 10 μm.
The pH value of described plating solution is 12-13, temperature is 40-50 DEG C, and the composition contained in plating solution is as follows: the yellow prussiate of potash of the sodium hydroxide of EDTA, 15-17g/L of the copper sulfate of 14-16g/L, the Seignette salt of 18-22g/L, 23-27g/L, the formaldehyde of 14-16ml/L, the second bipyridine of 5-7mg/L and 18-22mg/L.
Above-mentioned copper carbon fiber strengthens the preparation method of aluminum magnesium alloy matrix material, comprises the following steps:
1) Copper Plating of Carbon Fiber
Secure ph is the plating solution of 12-13
Take that copper sulfate, Seignette salt, EDTA, sodium hydroxide, formaldehyde, second bipyridine and yellow prussiate of potash are soluble in water is mixed with plating solution respectively, in plating solution, the content of each composition is respectively: copper sulfate 14-16g/L, Seignette salt 18-22g/L, EDTA23-27g/L, sodium hydroxide 15-17g/L, formaldehyde 14-16ml/L, second bipyridine 5-7mg/L and yellow prussiate of potash 18-22mg/L, and the temperature limiting plating solution is 40-50 DEG C;
Carbon fiber be placed in the plating solution prepared and carry out electroless plating until the surface attachment of carbon fiber has polycrystalline copper coating under the state keeping stirring;
2) batch mixing
The copper-plated carbon fiber in surface in step 1) is joined in al-mg alloy powder according to the ratio of volume fraction 1-10%, then adopts planetary ball mill batch mixing till not observing reunion, obtain raw material powder for subsequent use;
Wherein, the moiety of described aluminium-magnesium alloy powder be 10 ~ 40% Mg, 0.2 ~ 0.5% Cu, 0.1 ~ 0.4% Mn, Si, the Cr of 0.1 ~ 0.3% of 0.5 ~ 0.8%, the Ti of Zn, 0.1-0.5% of 0.1 ~ 0.5%, all the other are Al and inevitable impurity;
3) alloy is fired
By step 2) in the raw material powder that obtains vacuum tightness be 0.001-0.005Pa, pressure sinters under being the condition of 30-100MPa, during sintering, with the temperature rise rate of per minute 30-80 DEG C temperature risen to 440-480 DEG C and keep this temperature 5-30min to complete sintering, naturally cooling to room temperature after having sintered and namely obtain product.
During described electroless plating, according to the corresponding proportional distribution plating solution of 2.5-3.5g carbon fiber of often liter of plating solution and the amount of carbon fiber.
Beneficial effect: the present invention is by the plated surface last layer polycrystalline copper coating at carbon fiber, thus improve the interface wetting property of carbon fiber and aluminum magnesium alloy, also inhibits surface reaction therebetween simultaneously, and then make carbon fiber can be used to strengthen aluminum magnesium alloy, reduce the density of alloy, improve toughness and the anisotropy of alloy, improve the intensity of aluminum magnesium alloy, expand the application space of aluminum magnesium alloy.After testing, product over-all properties of the present invention is good: density is at 2.45 ~ 2.65g/cm
3, tensile strength is between 480 ~ 530MPa, and hardness, between 85 ~ 110HV, some parts of aircraft has a good application prospect.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated.
Embodiment 1
In the present embodiment, the moiety of al-mg alloy powder used and weight percent are: the Mg of 10%, the Cu of 0.5%, 0.4% Mn, the Si of 0.8%, Cr, the Zn of 0.5%, the Ti of 0.5% of 0.3%, copper carbon fiber volume content 1%, all the other are Al and inevitable impurity.
Concrete preparation method is as follows:
(1) carbon fiber is put in plating solution, under electric stirring mode, carry out electroless plating.Solution composition is: copper sulfate 14g/L, Seignette salt 18g/L, EDTA23g/L, sodium hydroxide 15g/L, formaldehyde 14ml/L, second bipyridine 5mg/L, yellow prussiate of potash 18mg/L, and temperature is 40 DEG C, and pH value is 12, often liter of corresponding carbon fiber 3.5g of plating solution.After electroless plating terminates, copper plate well-crystallized, the polycrystalline Cu coating be made up of different orientation Cu crystal grain, thickness is about 1 μm;
(2) copper carbon fiber that step (1) is handled well is joined in al-mg alloy powder by 1% volume fraction, adopt the abundant batch mixing of planetary ball mill 6 hours, till not observing reunion, the raw material mixed is loaded in dry glassware for subsequent use;
(3) powder mixed in step (2) is loaded in mould, the mould installing powdered alloy is put into sintering oven, when in vacuum oven, vacuum reaches 0.001Pa, sample to be exerted pressure the pressure of 30MPa, energising is with the ramp to 440 DEG C of per minute 30 DEG C, be incubated after 30 minutes and lower the temperature, be down to room temperature when temperature and take out sample.
Fibre reinforced al-mg alloy powder performance perameter prepared by the present embodiment is: density is 2.63g/cm
3, after ageing treatment, tensile strength reaches 496MPa, and hardness is 93HV.
Embodiment 2
In the present embodiment, the moiety of al-mg alloy powder used and weight percent are: the Mg of 40%, the Cu of 0.2%, 0.1% Mn, the Si of 0.5%, Cr, the Zn of 0.1%, the Ti of 0.1% of 0.1%, copper carbon fiber volume content 10%, all the other are Al and inevitable impurity.
Concrete preparation method is as follows:
(1) carbon fiber that pre-treatment is good is put in plating solution, under electric stirring mode, carry out electroless plating.Solution composition is: copper sulfate 16g/L, Seignette salt 22g/L, EDTA27g/L, sodium hydroxide 17g/L, formaldehyde 16ml/L, second bipyridine 7mg/L, yellow prussiate of potash 22mg/L, and temperature is 50 DEG C, and pH value is 13, often liter of corresponding carbon fiber 2.5g of plating solution.After electroless plating terminates, copper plate well-crystallized, the polycrystalline Cu coating be made up of different orientation Cu crystal grain, thickness is about 1 μm;
(2) the copper facing short carbon fiber that step (1) is handled well is joined in al-mg alloy powder by 10% volume fraction, adopt the abundant batch mixing of planetary ball mill 8 hours, till not observing reunion, the raw material mixed is loaded in dry glassware for subsequent use;
(3) powder mixed in step (2) is loaded in mould, the mould installing powdered alloy is put into sintering oven, when in vacuum oven, vacuum reaches 0.005Pa, sample to be exerted pressure the pressure of 100MPa, energising is warming up to 480 DEG C with the temperature rise rate of per minute 80 DEG C, be incubated after 5 minutes and lower the temperature, be down to room temperature when temperature and take out sample.
Fibre reinforced al-mg alloy powder performance perameter prepared by the present embodiment is: density is 2.46g/cm
3, after ageing treatment, tensile strength reaches 511MPa, and hardness is 101HV.
Embodiment 3
In the present embodiment, the moiety of al-mg alloy powder used and weight percent are: the Mg of 25%, the Cu of 0.35%, 0.25% Mn, the Si of 0.65%, Cr, the Zn of 0.3%, the Ti of 0.3% of 0.2%, copper carbon fiber volume content 5.5%, all the other are Al and inevitable impurity.
Concrete preparation method is as follows:
(1) carbon fiber that pre-treatment is good is put in plating solution, under electric stirring mode, carry out electroless plating.Solution composition is: copper sulfate 15g/L, Seignette salt 20g/L, EDTA25g/L, sodium hydroxide 16g/L, formaldehyde 15ml/L, second bipyridine 6mg/L, yellow prussiate of potash 20mg/L, and temperature is 45 DEG C, and pH value is 12.5, often liter of corresponding carbon fiber 3g of plating solution.After electroless plating terminates, copper plate well-crystallized, the polycrystalline Cu coating be made up of different orientation Cu crystal grain, thickness is about 1 μm;
(2) the copper facing short carbon fiber that step (1) is handled well is joined in al-mg alloy powder by 5.5% volume fraction, adopt the abundant batch mixing of planetary ball mill 8 hours, till not observing reunion, the raw material mixed is loaded in dry glassware for subsequent use;
(3) powder mixed in step (2) is loaded in mould, the mould installing powdered alloy is put into sintering oven, when in vacuum oven, vacuum reaches 0.003Pa, sample to be exerted pressure the pressure of 65MPa, energising is warming up to 455 DEG C with the temperature rise rate of per minute 55 DEG C, be incubated after 17 minutes and lower the temperature, be down to room temperature when temperature and take out sample.
Fibre reinforced al-mg alloy powder performance perameter prepared by the present embodiment is: density is 2.53g/cm
3, after ageing treatment, sample tensile strength reaches 526MPa, and hardness is 105HV.
Claims (4)
1. a copper carbon fiber strengthens aluminum magnesium alloy matrix material, it is characterized in that: by particle diameter to be the aluminium-magnesium alloy powder of 10-15 μm and volume fraction thereof be 1 ~ 10% copper carbon fiber mix after be 0.001-0.005Pa in vacuum tightness, pressure is sinter under the condition of 30-100MPa to obtain, during sintering, with the temperature rise rate of per minute 30-80 DEG C temperature risen to 440-480 DEG C and keep this temperature 5-30min to complete sintering, wherein, according to weight percent, the moiety of aluminium-magnesium alloy powder is the Mg of 10 ~ 40%, the Cu of 0.2 ~ 0.5%, the Mn of 0.1 ~ 0.4%, the Si of 0.5 ~ 0.8%, the Cr of 0.1 ~ 0.3%, the Zn of 0.1 ~ 0.5%, the Ti of 0.1-0.5%, all the other are Al and inevitable impurity,
Described copper carbon fiber is obtained by the mode of electroless plating in the carbon fiber immersion plating solution of diameter 10 μm.
2. a kind of copper carbon fiber according to claim 1 strengthens aluminum magnesium alloy matrix material, it is characterized in that: the pH value of described plating solution is 12-13, temperature is 40-50 DEG C, and the composition contained in plating solution is as follows: the yellow prussiate of potash of the sodium hydroxide of EDTA, 15-17g/L of the copper sulfate of 14-16g/L, the Seignette salt of 18-22g/L, 23-27g/L, the formaldehyde of 14-16ml/L, the second bipyridine of 5-7mg/L and 18-22mg/L.
3. copper carbon fiber according to claim 2 strengthens the preparation method of aluminum magnesium alloy matrix material, it is characterized in that, comprises the following steps:
1) Copper Plating of Carbon Fiber
Secure ph is the plating solution of 12-13
Take that copper sulfate, Seignette salt, EDTA, sodium hydroxide, formaldehyde, second bipyridine and yellow prussiate of potash are soluble in water is mixed with plating solution respectively, in plating solution, the content of each composition is respectively: copper sulfate 14-16g/L, Seignette salt 18-22g/L, EDTA23-27g/L, sodium hydroxide 15-17g/L, formaldehyde 14-16ml/L, second bipyridine 5-7mg/L and yellow prussiate of potash 18-22mg/L, and the temperature limiting plating solution is 40-50 DEG C;
Carbon fiber be placed in the plating solution prepared and carry out electroless plating until the surface attachment of carbon fiber has polycrystalline copper coating under the state keeping stirring;
2) batch mixing
The copper-plated carbon fiber in surface in step 1) is joined in al-mg alloy powder according to the ratio of volume fraction 1-10%, then adopts planetary ball mill batch mixing till not observing reunion, obtain raw material powder for subsequent use;
Wherein, the moiety of described aluminium-magnesium alloy powder be 10 ~ 40% Mg, 0.2 ~ 0.5% Cu, 0.1 ~ 0.4% Mn, Si, the Cr of 0.1 ~ 0.3% of 0.5 ~ 0.8%, the Ti of Zn, 0.1-0.5% of 0.1 ~ 0.5%, all the other are Al and inevitable impurity;
3) alloy is fired
By step 2) in the raw material powder that obtains vacuum tightness be 0.001-0.005Pa, pressure sinters under being the condition of 30-100MPa, during sintering, with the temperature rise rate of per minute 30-80 DEG C temperature risen to 440-480 DEG C and keep this temperature 5-30min to complete sintering, naturally cooling to room temperature after having sintered and namely obtain product.
4. copper carbon fiber according to claim 3 strengthens the preparation method of aluminum magnesium alloy matrix material, it is characterized in that: during described electroless plating, according to the corresponding proportional distribution plating solution of 2.5-3.5g carbon fiber of often liter of plating solution and the amount of carbon fiber.
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| CN105039877B (en) * | 2015-08-05 | 2016-11-30 | 同济大学 | Carbon fiber reinforced aluminum matrix composite and preparation method and application |
| CN107190215B (en) * | 2017-06-13 | 2019-07-05 | 上海新益电力线路器材有限公司 | A kind of aluminium alloy base power circuit component and preparation method thereof |
| CN108203794B (en) * | 2018-01-04 | 2020-02-14 | 中南大学 | Short carbon fiber aluminum-based composite material and preparation method thereof |
| CN112008084B (en) * | 2020-09-02 | 2022-05-10 | 宁波乌卡科技有限公司 | Preparation method and application of aluminum-iron composite material for machine arm |
| CN112453401B (en) * | 2020-12-04 | 2021-12-28 | 西安交通大学 | Method for reducing anisotropy of rare earth molybdenum alloy material |
| CN113005373B (en) * | 2021-02-19 | 2022-09-30 | 北京金煤创业科技股份有限公司 | Metal-based fiber reinforced sintered composite hot die forging process and metal fiber composite material thereof |
| CN114645266A (en) * | 2022-02-28 | 2022-06-21 | 西北工业大学 | Preparation method of carbon fiber surface copper coating for improving carbon/magnesium composite material interface and wettability thereof |
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