CN106216395A - A kind of method preparing alumina particle reinforced aluminum matrix composites - Google Patents

A kind of method preparing alumina particle reinforced aluminum matrix composites Download PDF

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Publication number
CN106216395A
CN106216395A CN201610644490.8A CN201610644490A CN106216395A CN 106216395 A CN106216395 A CN 106216395A CN 201610644490 A CN201610644490 A CN 201610644490A CN 106216395 A CN106216395 A CN 106216395A
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alumina particle
aluminum matrix
matrix composites
sample
rolling
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CN106216395B (en
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梅青松
李杨
李聪玲
管茂生
李菊英
陈�峰
马烨
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Wuhan University WHU
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Wuhan University WHU
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
    • B21B47/02—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal for folding sheets before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/386—Plates

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

The invention discloses a kind of method preparing alumina particle reinforced aluminum matrix composites.The present invention obtains the ply rolling number of times aluminum matrix composite containing different volumes mark alumina particle reinforcement different, internal first by accumulation ply rolling method, then use follow-up discharge plasma sintering technique that sample is processed, successfully prepare alumina particle reinforced aluminum matrix composites.Composite obtained by the present invention is fine and close, in conjunction with all right；Include the reinforcement that high-volume fractional, Dispersed precipitate and granule are tiny；There is good combination property.The alumina particle reinforced aluminum matrix composites of different performance can be obtained by adjusting the parameter such as accumulation ply rolling number of times and reinforcement volume fraction.The method applied in the present invention equipment needed thereby is simple, cheap, easy and simple to handle and be prone to industrialized production.

Description

A kind of method preparing alumina particle reinforced aluminum matrix composites
Technical field
The present invention relates to a kind of method preparing alumina particle reinforced aluminum matrix composites, particularly relate to a kind of utilization and tire out The method that long-pending ply rolling method and discharge plasma sintering technique prepare alumina particle reinforced aluminum matrix composites, belongs to composite Preparation field.
Background technology
Aluminum matrix composite is usually with aluminum and alloy thereof as continuous phase, and granule, whisker, continuous fiber or chopped fiber are Second metal-base composites strengthening phase composition.Aluminum matrix composite relies on its 1. high specific strength, high ratio modulus；The most wear-resisting Damage；The best high-temperature behavior；4. excellent electrical and thermal conductivity；5. good stability of the dimension, linear expansion coefficient is little；Outstanding is anti-tired The characteristic such as labor and fracture toughness gradually in many fields such as Aero-Space, military affairs, transportation, recreation industry de-grain husk and Go out, establish the status of its new material.
Particle enhanced aluminum-based composite material preparation process is simple, low cost, adds particle enhanced aluminum-based composite material Isotropism, it is to avoid in fiber reinforced aluminum matrix composites preparation technology, recurrent architectural difference is big, strengthen damage mutually, The appearance of the difficult problem such as interreaction between strengthening mutually.The reinforced particulate that present stage is commonly used mainly has aluminium oxide, carborundum, carbonization The ceramic particles such as titanium, boron carbide, silicon nitride, graphite, wherein most commonly seen with carborundum and alumina particle.Alumina particle with Al2O3For main component, have possibly together with other oxides such as SiO2、B2O3Deng, its outstanding feature is to have high intensity, Gao Mo Amount, excellent thermal insulation and non-oxidizability；The tensile strength that can have kept at a higher temperature；Good surface activity, easily with Metallic matrix is combined；Cost of material is low, and production technology is simple, has high cost performance.
The method preparing particle enhanced aluminum-based composite material at present mainly has: powder metallurgic method, liquid cast method, seriously moulds Property deformation method etc..Wherein liquid cast method production efficiency is high, with low cost, but add size between reinforcement granule time Easily occur reunion and violent stirring may cause oxidation and the suction of air of aluminum base melt.Powder metallurgic method prepares aluminum base Composite technology is complicated, costly；Fabrication cycle is longer；Manufacture large-sized zero component there be difficulties involved when；Manufacture There is the defect such as space, segregation in the material internal obtained, performance is relatively inaccessible to best of breed.Severe plastic deformation method refers to high Plastic strain be applied on material form the processing technique of ultra-fine grained structure mainly containing high-angle boundary, the method is subject to Sample plasticity limits, and equipment requirements is high, and obtained sample exists the problems such as plasticity difference, and preparation cost is high, it is difficult to for big Technical scale produces.
Summary of the invention
The technical problem to be solved is to provide that a kind of equipment requirements is low, easy and simple to handle, reinforced particle size The alumina particle reinforced aluminum matrix composites preparation method controlled, sample size scope is big.
For achieving the above object, the method that the present invention provides is a kind of accumulation ply rolling method and discharge plasma sintering technique knot The method of aluminum matrix composite is prepared in conjunction.First, accumulation ply rolling method is used to obtain ply rolling number of times different, internal containing different volumes The aluminum matrix composite of mark alumina particle reinforcement；Then, use follow-up discharge plasma sintering technique that sample is entered Row processes, and finally gives alumina particle reinforced aluminum matrix composites sample.
Specifically include following steps:
Step one: choose full annealing state pure aluminum plate, and carry out surface reason, gets rid of oxide-film and the greasy dirt on surface； Choose the alumina particle of volume fraction is pure aluminum plate 0.75%～15% again as reinforcement, by load weighted aluminium oxide granule Grain, in acetone after ultrasonic vibration, is coated uniformly on the aluminum flake surface handled well；
Step 2: after acetone volatilizees, aluminium flake be stacked together and fix, the sample fixed being carried out a time and rolls System, carries out surface process to the sample after rolling a time, removes greasy dirt and oxide on surface, no longer add alumina particle, Along rolling direction doubling, then roll, repeat the above steps, carry out accumulation ply rolling, until rolling pass reaches 12～14 times；
Step 3: choose sintering temperature be 500 DEG C, sintered heat insulating pressing time be 5min, sintering pressure be 80MPa, right Accumulation ply rolling sample carries out discharge plasma sintering process, obtains alumina particle reinforced aluminum matrix composites.
Step one can reach to be dispersed in alumina particle reinforcement the accumulation ply rolling road of effect in aluminum substrate Secondary it is directly proportional to alumina particle volume fraction.
In step 2, during every time rolling, the deflection of thickness is about 50%.
In step 3, preferred sintering mold is graphite jig.
The size of the sintered sample finally given in step 3 is only dependent upon diameter and the sintering mold of sintering mold Two pressure head spacing.
The method that the present invention uses has equipment needed thereby simple in construction, cheap, easy and simple to handle, it is easy to industrialization etc. have Advantage, is the alumina particle reinforced aluminum matrix composites preparation method of a kind of applicable industrialization large-scale production and according to making With preparation, there is diverse microcosmic structure with requiring to adjust accumulation ply rolling passage and alumina particle volume fraction in the present invention And the composite of combination property.
Compared with prior art, the invention has the beneficial effects as follows:
1. the method equipment needed thereby of the present invention is simple, cheap, easy and simple to handle and be prone to industrialized production.
2. the method for the present invention can change compound by adjusting accumulation ply rolling passage and alumina particle volume fraction The microstructure of material, it is thus achieved that the alumina particle reinforced aluminum matrix composites of different combination properties.
3. in the present invention, sintered sample size range is big, is only dependent upon diameter and sintering mold two pressure of sintering mold Head spacing size.
Below in conjunction with the accompanying drawings and example, technical scheme is described in further detail.
Accompanying drawing explanation
Fig. 1 is that the scanning electron microscope (SEM) of the original nano aluminium oxide used in the embodiment of the present invention is observed.
Fig. 2 is in the embodiment of the present invention, and alumina particle addition is the sample of 0.75vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.
Fig. 3 is in the embodiment of the present invention, and alumina particle addition is the sample of 3.75vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.
Fig. 4 is in the embodiment of the present invention, and alumina particle addition is the sample of 7.5vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.
Fig. 5 is in the embodiment of the present invention, and alumina particle addition is the sample of 15vol.%, folded through 12 passage accumulations The scanning electron microscope (SEM) of the aluminium oxide reinforced aluminum matrix composites longitudinal section rolled and use discharge plasma sintering process to obtain is seen Examine.
Fig. 6 is in the embodiment of the present invention, and alumina particle addition is the sample of 3.75vol.%, accumulates through 14 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is described further:
Embodiment 1: with alumina particle as reinforcement, 1060 fine aluminium sheets be matrix citing.In the present embodiment, pure aluminum plate contains Aluminum amount is 99.99%, a size of: 100 × 20 × 0.25mm；Alumina particle size is 471nm.Use industrial rolling mills, rolling Speed is 187mm/min.
First, cut the fine aluminium sheet of 100 × 20 × 0.25mm size, and sample is polished and clears up.
According to the volume of the fine aluminium sheet used, after being computed, the alumina particle of different volumes mark is joined in right amount In ethanol and use ultrasonic washing instrument make alumina particle be evenly mixed in ethanol formation alumina particle suspension.By oxygen Change alumina particles suspension and be poured onto the surface of required pure aluminum plate equably.The fine aluminium sheet sample that surface is covered with alumina particle is folded After adduction is fixed with glue, use the corrosion resistant plate clamping fine aluminium sheet of doubling and be sent to accumulation ply rolling between two rolls, regulation The spacing of two rolls, it is ensured that sample drafts is about 50%.
After the first passage accumulation ply rolling, often after once accumulation ply rolling should by sample take out cleaning surface and from Above-mentioned accumulation ply rolling process is repeated after middle doubling.It addition, often slide gauge just should be used to survey through once accumulation ply rolling Measure the thickness of sample and calculate whether deflection reaches 50%, being not up to the sample of deflection requirement the accumulation ply rolling later stage, It is sandwiched again in steel disc the rolling carried out again, until reaching required deflection.Each rolling aspect product are discharged Plasma agglomeration processes, wherein sintering temperature be 500 DEG C, sintered heat insulating pressing time be 5min, sintering pressure be 80MPa, burning Sample leads to during knot argon shield prevents it from aoxidizing.
Fig. 1 is that used in the present invention, original nano aluminium oxide scanning electron microscope (SEM) is observed.Through analyzing, aluminium oxide is original Particle size is 471nm.
Fig. 2 is in the embodiment of the present invention, and alumina particle addition is the sample of 0.75vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.Nanometer Al2O3Particle dispersion is distributed, and does not has obvious tropism.Through analyzing, alumina particle size is 400nm；Through surveying Amount, the microhardness of sample is 35HV.
Fig. 3 is in the embodiment of the present invention, and alumina particle addition is the sample of 3.75vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.Nanometer Al2O3Granule is uniformly dispersed.Al2O3Granule progressively refines.Through analyzing, alumina particle size is 330nm；Through surveying Amount, the microhardness of sample is 46HV.
Fig. 4 is in the embodiment of the present invention, and alumina particle addition is the sample of 7.5vol.%, accumulates through 12 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.Nanometer Al2O3Granule is uniformly dispersed, and does not has obvious tropism, and particle free zone the most no longer exists.Through analyzing, aluminium oxide Particle size is 328nm；Through measuring, the microhardness of sample is 51HV.
Fig. 5 is in the embodiment of the present invention, and alumina particle addition is the sample of 15vol.%, folded through 12 passage accumulations The scanning electron microscope (SEM) of the aluminium oxide reinforced aluminum matrix composites longitudinal section rolled and use discharge plasma sintering process to obtain is seen Examine.Nanometer Al2O3The dispersion of granule is the most uniform.Through analyzing, alumina particle size is 316nm；Through measuring, sample micro- Hardness is 73HV.
Fig. 6 is in the embodiment of the present invention, and alumina particle addition is the sample of 3.75vol.%, accumulates through 14 passages Ply rolling also uses the scanning electron microscope (SEM) of aluminium oxide reinforced aluminum matrix composites longitudinal section that discharge plasma sintering process obtains Observe.Nanometer Al2O3Particle dispersion is evenly distributed in inside aluminum substrate.Through analyzing, alumina particle size is 208nm；Through surveying Amount, the microhardness of sample is 46.42HV.

Claims (3)

1. an alumina particle reinforced aluminum matrix composites preparation method, it is characterised in that comprise the steps:
Step one: choose full annealing state pure aluminum plate, and carry out surface reason, gets rid of oxide-film and the greasy dirt on surface；Select again Take the alumina particle of volume fraction is pure aluminum plate 0.75%～15% as reinforcement, by load weighted alumina particle third In ketone after ultrasonic vibration, it is coated uniformly on the aluminum flake surface handled well；
Step 2: after acetone volatilizees, multilamellar aluminium flake is stacked together and fixes, the sample fixed is carried out a time and rolls System, carries out surface process to the sample after rolling a time, removes greasy dirt and oxide on surface, no longer add alumina particle, Along rolling direction doubling, then roll, repeat the above steps, carry out accumulation ply rolling, until rolling pass reaches 12～14 times；
Step 3: choose sintering temperature be 500 DEG C, sintered heat insulating pressing time be 5min, sintering pressure be 80MPa, to accumulation Ply rolling sample carries out discharge plasma sintering process, obtains alumina particle reinforced aluminum matrix composites.
Preparation method the most according to claim 1, it is characterised in that in step 2, during every time rolling, the change of thickness Shape amount is 50%.
Preparation method the most according to claim 1, it is characterised in that in step 3, sintering mold is graphite jig.
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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN106654232A (en) * 2017-01-20 2017-05-10 北京航空航天大学 Preparation method of laminar composite for negative electrode of secondary metal lithium battery
CN106756194A (en) * 2017-01-22 2017-05-31 武汉大学 A kind of aluminium oxide particle reinforced copper base composite and its preparation method and application
CN109680182A (en) * 2019-02-21 2019-04-26 武汉大学 A kind of aluminium-Intermatallic Ti-Al compound-alumina composite material and its preparation method and application
CN112626377A (en) * 2020-11-11 2021-04-09 武汉轻工大学 Al (aluminum)2O3Reinforced aluminum-based composite material and preparation method thereof
CN114453581A (en) * 2022-01-12 2022-05-10 北京航空航天大学 Powder metallurgy high-strength high-conductivity aluminum material and preparation method thereof

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106654232A (en) * 2017-01-20 2017-05-10 北京航空航天大学 Preparation method of laminar composite for negative electrode of secondary metal lithium battery
CN106654232B (en) * 2017-01-20 2019-04-12 北京航空航天大学 A kind of preparation method of secondary metals cathode of lithium battery laminated composites
CN106756194A (en) * 2017-01-22 2017-05-31 武汉大学 A kind of aluminium oxide particle reinforced copper base composite and its preparation method and application
CN109680182A (en) * 2019-02-21 2019-04-26 武汉大学 A kind of aluminium-Intermatallic Ti-Al compound-alumina composite material and its preparation method and application
CN109680182B (en) * 2019-02-21 2020-08-07 武汉大学 Aluminum-titanium-aluminum intermetallic compound-aluminum oxide composite material and preparation method and application thereof
CN112626377A (en) * 2020-11-11 2021-04-09 武汉轻工大学 Al (aluminum)2O3Reinforced aluminum-based composite material and preparation method thereof
CN112626377B (en) * 2020-11-11 2021-11-05 武汉轻工大学 Al (aluminum)2O3Reinforced aluminum-based composite material and preparation method thereof
CN114453581A (en) * 2022-01-12 2022-05-10 北京航空航天大学 Powder metallurgy high-strength high-conductivity aluminum material and preparation method thereof

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