CN111719061A - Method for preparing aluminum alloy composite material and aluminum alloy thereof - Google Patents
Method for preparing aluminum alloy composite material and aluminum alloy thereof Download PDFInfo
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Abstract
The invention discloses a method for preparing an aluminum alloy composite material, belongs to the technical field of aluminum alloy composite materials, and solves the technical problem that the method in the prior art is easy to oxidize when preparing the aluminum alloy composite material. Adding organic silicon resin into the nano-carbon slurry, stirring and mixing uniformly to prepare nano-carbon composite slurry; drying and sintering the nano-carbon composite slurry to prepare nano-carbon composite powder; mixing the nano carbon composite powder with aluminum powder, and dispersing the mixture in an absolute ethyl alcohol solution to prepare aluminum foil slurry; and drying the solvent after the aluminum foil slurry is filtered to obtain the aluminum alloy composite material and the aluminum alloy product thereof. The invention is used for perfecting the preparation process flow of the aluminum alloy composite material and meeting the requirements of people on simple and reliable process flow of the aluminum alloy composite material.
Description
Technical Field
The invention belongs to the technical field of alloy composite materials, and particularly relates to a method for preparing an aluminum alloy composite material and an aluminum alloy thereof.
Background
The aluminum alloy material is a non-ferrous metal structural material which is most widely applied in industry, and the cast aluminum alloy has good casting performance, for example, the cast aluminum alloy can be made into parts with complex shapes without huge additional equipment, has the advantages of saving metal, reducing cost and the like, and is widely applied in industries such as aviation, aerospace, automobiles, mechanical manufacturing, ships and the like. The nano carbon has super high modulus, strength, electric conductivity and thermal conductivity, and is an ideal reinforcing phase of the aluminum alloy, and the mechanical property of the aluminum alloy can be improved by adding a proper amount of nano carbon material, so that the improvement of the content of the nano carbon in the aluminum alloy is an optional way for realizing performance enhancement.
Chinese patent literature, publication No. CN108359831A, discloses a "method for preparing graphene composite aluminum alloy", in the present invention, by grinding graphene and aluminum alloy powder in a ball mill, the wettability of graphene is improved, graphene is rapidly and uniformly distributed in a metal solution, the thermal conductivity of the obtained graphene aluminum alloy profile is greatly improved, and the strength, toughness and the like of the graphene composite aluminum alloy material are improved, but graphene is easily oxidized in the grinding process, the process complexity of product preparation is undoubtedly increased, so that the industrial production cycle is lengthened, and the manufacturing economic cost is increased.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a method for preparing a cast aluminum alloy composite material, which solves the technical problem that the aluminum alloy composite material prepared by the method in the prior art is easy to oxidize. The invention has many beneficial effects, which are described in detail in the following.
In order to achieve the above object, in one aspect, the present invention provides the following technical solutions: the preparation method comprises the following steps:
s1, adding organic silicon resin into the nano-carbon slurry, and uniformly stirring and mixing to prepare nano-carbon composite slurry;
s2, drying and sintering the nano-carbon composite slurry in a vacuum state to prepare nano-carbon composite powder;
s3, mixing the nano-carbon composite powder with aluminum powder, and dispersing the mixed mixture into an absolute ethyl alcohol solution to prepare aluminum foil slurry;
and S4, drying the filtered solvent of the aluminum foil slurry in a vacuum environment to obtain the aluminum alloy composite material. Compared with the mixing of graphene and aluminum alloy powder, the nano-carbon composite powder and aluminum powder are higher in oxidation resistance, the nano-carbon composite powder is not required to be stored by adopting an oxidation resistance process independently, and the nano-carbon composite powder and the aluminum powder are prevented from being oxidized in the mixing process by adopting additional equipment, so that the reduction of the physical property of the aluminum alloy composite material due to oxidation is avoided.
In a preferred or alternative embodiment, the method for preparing the nanocarbon paste in S1 includes: mixing graphite worms or nano carbon powder with an organic solvent, and preparing the mixture by reaction equipment. The nano-carbon composite slurry prepared from the graphite worms or the nano-carbon powder improves the oxidation resistance of the aluminum alloy material preparation process by utilizing the chemical characteristics of the graphite worms or the nano-carbon powder.
In a preferred or optional embodiment, the mass part ratio of the graphite worms or the carbon nanopowders to the organic solvent is (1-25): 100 parts.
In a preferred or alternative embodiment, the graphite worms are obtained by heating expandable graphite to 400-1100 ℃ for expansion; the specific surface area of the graphite worms is more than 40m2G and a multiple expansion of more than 200.
In a preferred or alternative embodiment, the organic solvent is prepared from (2-40) parts by mass of methyl isobutyl ketone, dimethyl methanol and triethanolamine: (5-60) parts of: (4-30).
In a preferred or alternative embodiment, the mass parts of the nanocarbon slurry and the silicone resin are 100 parts: (1-30) parts;
the organic silicon resin is prepared from ethyl orthosilicate, absolute ethyl alcohol and dibutyl dilaurate in parts by mass (1-40): (2-40) parts of: (3-30).
In a preferred or alternative embodiment, the sintering temperature of the nanocarbon composite slurry in S2 is 200 ℃ to 700 ℃ and the sintering time is 1H to 10H.
In a preferred or alternative embodiment, the mass parts of the mixture and the absolute ethyl alcohol solution in the S3 are (10-40): 100, respectively; the aluminum powder and the nano carbon composite powder are 100 parts by weight: (1-45).
In a preferred or alternative embodiment, S3 is ball milled by adding milling media to the mixture, which can reduce wear on the equipment.
In a preferred or optional embodiment, the mass part ratio of the raw material powder mixed with the aluminum powder and the nano-carbon composite powder to the zirconia beads (1-40) is as follows: 100 parts.
Another aspect provides an aluminum alloy prepared using some or all of the above methods.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the method, organic silicon resin is added into nano carbon slurry and is stirred and mixed uniformly to prepare nano carbon composite slurry, the nano carbon composite slurry is subjected to physical treatment to prepare nano carbon composite powder, the nano carbon composite powder and aluminum powder are mixed and dispersed in absolute ethyl alcohol solution, the absolute ethyl alcohol solution has the effect of coating the nano carbon composite powder to prevent the nano carbon composite powder from being oxidized when contacting with the aluminum powder, aluminum foil slurry is prepared, and a solvent obtained by filtering the aluminum foil slurry is dried to obtain the aluminum alloy composite material. Compared with the mixing of graphene and aluminum alloy powder, the nano-carbon composite powder and aluminum powder are higher in oxidation resistance, the nano-carbon composite powder is not required to be stored by adopting an oxidation resistance process independently, additional equipment is not required to be adopted to prevent the nano-carbon composite powder and the aluminum powder from being oxidized in the mixing process, and the reduction of the physical property of the aluminum alloy composite material due to oxidation is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a frame diagram of a production process for preparing an aluminum alloy composite material according to the present invention;
FIG. 2 is a flow chart of the production process for preparing the aluminum alloy composite material of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are only a few embodiments of the invention, and are not exhaustive. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention.
The method for preparing the aluminum alloy composite material of the invention is further described in detail with reference to the attached drawings as follows: the preparation method comprises the following steps:
s1, adding organic silicon resin into the nano-carbon slurry, and uniformly stirring and mixing to prepare nano-carbon composite slurry;
the nano carbon material is a carbon material with at least one dimension of a disperse phase dimension less than 100 nm. The dispersed phase may consist of carbon atoms, may also consist of heterogeneous atoms, and may even be nanoporous. The nano carbon slurry, for example, graphite worms or nano carbon powder and an organic solvent are put into a closed cold water pressure reaction kettle, and are mixed and dispersed at a shearing speed of more than or equal to 9000 r/s, for example, the nano carbon slurry is circularly dispersed and peeled at a shearing speed of more than or equal to 9000 r/s, and the average particle size is measured once sampling every cycle until the average particle size is less than 40 μm, so that the nano carbon slurry is obtained.
And S2, drying and sintering the nano-carbon composite slurry to prepare nano-carbon composite powder, preferably drying and sintering the nano-carbon composite slurry in a vacuum state, for example, the material is placed under a vacuum negative pressure condition to reduce the boiling point of water, the boiling point of water is 100 ℃ under one atmosphere, the boiling point of water can be reduced to 80 ℃ under the vacuum negative pressure condition (preferably the vacuum degree is-0.2 MP), the evaporation is started at 60 ℃ and 40 ℃, so that the drying efficiency is improved, and the drying time is reduced. Compared with graphene, the nano carbon composite powder has better oxidation resistance, and additional or extra process equipment investment is not needed when the composite aluminum alloy material is prepared, so the economic cost of the process for preparing the aluminum alloy material is improved.
S3, mixing the nano-carbon composite powder with aluminum powder, and dispersing the mixture in an absolute ethyl alcohol solution to prepare aluminum foil slurry; the composite material is preferably dissolved in a closed environment, so that the physical property of the composite material is prevented from being reduced due to the entry of external impurities, and the liquid nano-carbon composite powder is coated by the anhydrous ethanol solution, so that the oxidation in the subsequent process is avoided.
For example, an absolute ethyl alcohol solution is filled into a closed water-cooling pressure reaction kettle, aluminum powder and nano-carbon composite powder are added as raw material powder, and the raw material powder is mixed and ball-milled into sheets to prepare aluminum foil slurry.
And S4, drying the filtered solvent of the aluminum foil slurry to obtain the aluminum alloy composite material. The aluminum alloy composite material is preferably dried under a vacuum condition, the obtained aluminum alloy composite material is a high-strength aluminum alloy material, has higher strength compared with the method in the prior art, can also be used for preparing parts with complex structural shapes by adopting a metal casting method, has wide application prospect, and has the advantages of simple whole preparation process, easy control of the process and easy realization of industrial production.
And (2) carrying out physical treatment on the nano-carbon composite slurry to prepare nano-carbon composite powder, mixing and dispersing the nano-carbon composite powder and aluminum powder in an absolute ethanol solution to prepare aluminum foil slurry, and drying the solvent obtained by filtering the aluminum foil slurry to obtain the aluminum alloy composite material. Compared with the mixing of graphene and aluminum alloy powder, the nano-carbon composite powder and aluminum powder are higher in oxidation resistance, and the nano-carbon composite powder is not required to be stored by adopting an oxidation resistance process independently, and is not required to be prevented from being mixed by adopting additional equipment.
As an alternative embodiment, the preparation method of the nanocarbon slurry in S1 includes: mixing graphite worms or nano carbon powder with an organic solvent, and preparing the mixture by using reaction equipment, wherein the preferable mass parts of the graphite worms or the nano carbon powder and the organic solvent are (1-25): 100 parts of (A);
the Graphite worms, also called Expanded Graphite (EG for short), are loose and porous vermicular substances obtained by intercalating, washing, drying and puffing natural Graphite flakes at high temperature. EG not only has the excellent performances of cold and heat resistance, corrosion resistance, self-lubrication and the like of natural graphite, but also has the characteristics of softness, compression resilience, adsorbability, ecological environment coordination, biocompatibility, radiation resistance and the like which are not possessed by the natural graphite, and the oxidation resistance of EG is improved by mixing the EG with an organic solvent;
the organic solvent is prepared from (2-40) parts by mass of methyl isobutyl ketone, dimethyl methanol and triethanolamine: (5-60) parts of: (4-30) parts;
the mass parts of the nano carbon slurry and the organic silicon resin are 100 parts: (1-30) parts;
the organic silicon resin is prepared from ethyl orthosilicate, absolute ethyl alcohol and dibutyl dilaurate in parts by mass (1-40): (2-40) parts of: (3-30) preparing;
in the S3, the mass parts of the aluminum powder, the nano carbon composite powder and the absolute ethyl alcohol solution are (10-40): 100, respectively; the aluminum powder and the nano-carbon composite powder comprise 100 parts by mass: (1-45) parts of raw material powder mixed by aluminum powder and nano carbon composite powder and zirconia beads, wherein the mass part ratio of the raw material powder to the zirconia beads is (1-40): 100 parts.
Example 1, the mass parts of the graphite worms and the organic solvent are 10 parts: 100 parts, the mass parts of the nano carbon slurry and the organic silicon resin are 100 parts: 30 parts of aluminum powder and nano-carbon composite powder, wherein the mass part of the aluminum powder and the nano-carbon composite powder is 100 parts: 5 parts, preferably adding zirconia beads
1) As shown in figure 1, expandable graphite with expansion multiple of 600 times and 70 meshes is used as a raw material, the raw material is added into an electric heating tube furnace, and the graphite worms with high specific surface area and high carbon content are obtained by high-temperature heating treatment at 700 ℃, wherein the expansion multiple of the worms is about 300 times, and the specific surface area is 42m2/g。
Adding a certain amount of graphite worms into a closed pressure reaction kettle with a water jacket, and adding a required amount of organic solvent, wherein the mass parts of the graphite worms and the organic solvent are as follows: 100 parts. The organic solvent is preferably methyl isobutyl ketone, dimethyl methanol and triethanolamine, and the mass parts are 35 parts: 55 parts of: 10 parts of nano carbon slurry are dispersed at the speed of 5000rpm for 100min and then at the dispersion speed of 9000rpm for 90min to obtain nano carbon slurry, and the dispersion temperature is controlled at 25 ℃ by water cooling, and the average particle size is less than 40 mu m.
2) Adding organic silicon resin into a closed pressure reaction kettle, wherein the mass parts of the nano carbon slurry and the organic silicon resin are 100: 30 parts of organic silicon resin ethyl orthosilicate, absolute ethyl alcohol and dibutyl dilaurate, wherein the mass parts of the organic silicon resin ethyl orthosilicate, the absolute ethyl alcohol and the dibutyl dilaurate are 35 parts: 35 parts of: and 30 parts of the nano carbon composite slurry is slowly stirred at the speed of 200rpm for 14 hours and is uniformly mixed to prepare the nano carbon composite slurry, the dispersion temperature is controlled at 85 ℃ by adopting hot water, and a valve at the bottom of the kettle is opened to discharge the slurry.
3) And (3) drying the nano carbon composite wet particles in a vacuum oven by using a tray, condensing steam to recover the solvent, heating to 60 ℃, keeping for 4 hours, cooling to room temperature in a vacuum state, refluxing air to the vacuum oven, and keeping for 2 hours to obtain the dried nano carbon composite particles. And then the dried nano carbon composite particles are put into a sintering furnace to be heated, the sintering temperature is 350 ℃, and the time is 8H, so that the nano carbon composite powder is obtained.
4) Adding aluminum powder and nano carbon composite powder into a closed pressure reaction kettle to serve as raw material powder, and then adding absolute ethyl alcohol, wherein the mass parts of the raw material powder and the absolute ethyl alcohol solution are as follows: 100 parts of aluminum powder and nano carbon composite powder, wherein the mass part of the aluminum powder and the nano carbon composite powder is 100 parts: 5 parts of aluminum foil slurry is stirred and ball-milled in a vacuum state, the diameter of the aluminum powder is 30 mu m, the grinding beads are zirconia beads with the diameter of 10mm, and the stirring speed is 500 rpm.
Preferably, grinding media, such as zirconia beads, are added into the aluminum powder and nano-carbon composite powder raw material powder, the grinding media have the function of low abrasion to equipment, the zirconia beads have the advantages of high strength and high toughness at normal temperature, and have good abrasion resistance, high temperature resistance and corrosion resistance, the high-strength zirconia beads are the most ideal grinding media at present, and in the ore grinding production, the grinding media can play a role of improving the efficiency of a mill.
The mass parts of the mixed raw material powder of the aluminum powder and the nano carbon composite powder and the zirconia beads are 20: 100 portions, the temperature of the stirring ball milling is kept at 25 ℃ by cooling with cold water, and the stirring time is 8 hours, thus obtaining the specific surface area of 5.2m2Per gram of aluminum foil slurry, the vacuum degree is-0.2 MP.
5) Filtering the aluminum foil slurry, putting the wet aluminum foil particles in a vacuum oven for drying by using a tray, condensing steam to recover the solvent, heating to 60 ℃ for 2-5 h, keeping to 80 ℃ for 1-4 h, keeping to 100 ℃ for 1-2 h, cooling to room temperature in a vacuum state, returning air to the vacuum oven, and keeping for 2h to obtain the dry high-strength cast aluminum alloy composite material with the vacuum degree of-0.2 MP.
Example 2, the mass part ratio of the graphite worms to the organic solvent was 20 parts: 100 parts, the mass parts of the nano carbon slurry and the organic silicon resin are 100 parts: 20 parts, wherein the mass parts of the raw material powder and the absolute ethyl alcohol solution are 30 parts: 100 parts of aluminum powder and nano carbon composite powder, wherein the mass part of the aluminum powder and the nano carbon composite powder is 100 parts: 10 portions of
1) Adopting the same process equipment as in example 1, using expandable graphite with expansion ratio of 700 times 80 meshes as raw material, adding into an electric heating tube furnace, and heating at 800 deg.C to obtain graphite worms with high specific surface area and high carbon content, wherein the expansion ratio of the worms is about 350 times, and the specific surface area is 46m2(ii) in terms of/g. Adding a certain amount of graphite worms into a closed pressure reaction kettle with a water jacket for stirring, and then adding a required amount of organic solvent, wherein the mass ratio of the graphite worms to the organic solvent is 20: 100, mixing an organic solvent methyl isobutyl ketone, dimethyl methanol and triethanolamine according to a mass ratio of 25: 45: 30, dispersing at the speed of 5000rpm for 100min, then performing high-speed dispersion,dispersing at 9000rpm for 90min to obtain nanometer carbon slurry, and water cooling to control the dispersing temperature at 25 deg.C and average particle size less than 40 μm.
2) Adding organic silicon resin into a closed pressure reaction kettle, wherein the mass parts of the nano carbon slurry and the organic silicon resin are 100: 20 parts of organic silicon resin ethyl orthosilicate, absolute ethyl alcohol and dibutyl dilaurate in a mass ratio of 40: 35: and 25, slowly stirring at the speed of 300rpm for 12 hours, uniformly mixing to prepare the nano-carbon composite slurry, controlling the dispersion temperature at 85 ℃ by adopting hot water, and opening a valve at the bottom of the kettle to discharge the slurry.
3) And (3) drying the nano carbon composite wet particles in a vacuum oven by using a tray, condensing steam to recover the solvent, heating to 60 ℃, keeping for 4 hours, cooling to room temperature in a vacuum state, refluxing air to the vacuum oven, and keeping for 2 hours to obtain the dried nano carbon composite particles. And then the dried nano carbon composite particles are put into a sintering furnace to be heated, the sintering temperature is 450 ℃, and the time is 6H, so that the nano carbon composite powder is obtained.
4) Adding aluminum powder and nano carbon composite powder into a closed pressure reaction kettle to serve as raw material powder, and then adding absolute ethyl alcohol, wherein the mass parts of the raw material powder and the absolute ethyl alcohol solution are 30: 100 parts of aluminum powder and nano carbon composite powder, wherein the mass part of the aluminum powder and the nano carbon composite powder is 100 parts: 10 parts of aluminum foil slurry is stirred and ball-milled in a vacuum state, the diameter of the aluminum foil slurry is 30 microns, the milling beads are zirconia beads with the diameter of 10mm, the zirconia beads have enough strength and hardness, the zirconia beads are not easy to crack in the milling work, the stirring speed is 500rpm, and the mass ratio of the aluminum powder to the nano-carbon composite powder raw material powder to the zirconia beads is 20: 100. the temperature of the stirring ball mill is kept at 25 ℃ by cooling with cold water, and the stirring time is 8 hours, so that the specific surface area is 5.2m2Per gram of aluminum foil slurry, the vacuum degree is-0.2 MP.
5) Filtering the aluminum foil slurry, putting the wet aluminum foil particles in a vacuum oven for drying by using a tray, condensing steam to recover the solvent, heating to 60 ℃ for 2-5 h, keeping to 80 ℃ for 1-4 h, keeping to 100 ℃ for 1-2 h, cooling to room temperature in a vacuum state, returning air to the vacuum oven, and keeping for 2h to obtain the dry high-strength cast aluminum alloy composite material with the vacuum degree of-0.2 MP.
Example 3, the mass parts of the graphite worms and the organic solvent are 25 parts: 100 parts, the mass ratio of the nano carbon slurry to the organic silicon resin is 100 parts: 15 parts of raw material powder and an absolute ethyl alcohol solution, wherein the mass parts of the raw material powder and the absolute ethyl alcohol solution are 35 parts: 100 parts of aluminum powder and nano carbon composite powder, wherein the mass part of the aluminum powder and the nano carbon composite powder is 100 parts: 15 portions of
1) Adopting the same process equipment as in example 1, using 90 mesh expandable graphite with expansion multiple of 800 times as raw material, adding into an electric heating tube furnace, and heating at 900 deg.C to obtain graphite worms with high specific surface area and high carbon content, the expansion multiple of the worms is about 400 times, and the specific surface area is 48m2(ii) in terms of/g. Adding a certain amount of graphite worms into a closed pressure reaction kettle with a water jacket for stirring, and then adding a required amount of organic solvent, wherein the mass parts of the graphite worms and the organic solvent are 25: 100 parts of organic solvent methyl isobutyl ketone, dimethyl methanol and triethanolamine according to the mass ratio of 30: 40: 30, dispersing at 5000rpm for 100min, then dispersing at 9000rpm for 90min to obtain the nano carbon slurry, and controlling the dispersion temperature at 25 ℃ by water cooling, wherein the average particle size is less than 40 μm.
2) Adding organic silicon resin into a closed pressure reaction kettle, wherein the mass ratio of the nano carbon slurry to the organic silicon resin is 100 parts: 15 parts of organic silicon resin ethyl orthosilicate, absolute ethyl alcohol and dibutyl dilaurate in a mass ratio of 30: 40: and 30, slowly stirring at the speed of 400rpm for 8 hours, uniformly mixing to prepare the nano-carbon composite slurry, controlling the dispersion temperature at 85 ℃ by adopting hot water, and opening a valve at the bottom of the kettle to discharge the slurry.
3) And (3) drying the nano carbon composite wet particles in a vacuum oven by using a tray, condensing steam to recover the solvent, heating to 60 ℃, keeping for 4 hours, cooling to room temperature in a vacuum state, refluxing air to the vacuum oven, and keeping for 2 hours to obtain the dried nano carbon composite particles. And then the dried nano carbon composite particles are put into a sintering furnace to be heated, wherein the sintering temperature is 550 ℃, and the time is 4H, so that the nano carbon composite powder is obtained.
4) Adding aluminum powder and nano carbon-carbon composite powder into a closed pressure reaction kettle to serve as raw material powder, and then adding absolute ethyl alcohol into the reaction kettle, wherein the raw material powder and the nano carbon-carbon composite powder are non-aqueousThe mass portion of the aqueous ethanol solution is 35: 100 parts of aluminum powder and nano carbon composite powder, wherein the mass part of the aluminum powder and the nano carbon composite powder is 100 parts: 15 parts of aluminum foil slurry is stirred and ball-milled in a vacuum state, the diameter of the aluminum powder is 30 microns, the grinding beads are zirconia beads with the diameter of 10mm, the stirring speed is 500rpm, and the mass parts of the aluminum powder, the nano-carbon composite powder raw material powder and the zirconia beads are 20 parts: 100 parts. The temperature of the stirring ball mill is kept at 25 ℃ by cooling with cold water, and the stirring time is 8 hours, so that the specific surface area is 5.2m2Per gram of aluminum foil slurry, the vacuum degree is-0.2 MP.
5) Filtering the aluminum foil slurry, putting the wet aluminum foil particles in a vacuum oven for drying by using a tray, condensing steam to recover the solvent, heating to 60 ℃ for 2-5 h, keeping to 80 ℃ for 1-4 h, keeping to 100 ℃ for 1-2 h, cooling to room temperature in a vacuum state, returning air to the vacuum oven, and keeping for 2h to obtain the dry high-strength cast aluminum alloy composite material with the vacuum degree of-0.2 MP.
Comparison of Experimental data
The high-strength cast aluminum alloy powder with the average grain diameter of 40 microns selected in the example 1 is fully mixed with ZL101 cast ingot in a molten state, and a test sample piece is obtained by adopting a casting forming process.
Table 1 (see table below), the performance test was performed on the above 3 different parts of the finished product of the examples, and the test results of the performance of the ZL101 aluminum alloy cast samples with different addition amounts of the high-strength cast aluminum alloy were as follows:
TABLE 1
As can be seen from table 1, the aluminum alloy composite material obtained by adding the high-strength cast aluminum alloy of the present invention has the advantage of higher mechanical strength than the high-strength cast material without adding, and the performance is further improved with the increase of the addition amount. The high-strength cast aluminum alloy composite material can be cast into a complex shape and has excellent mechanical properties.
Similarly, the use method and performance of the high-strength cast aluminum alloy composite material of the embodiment 2 and the embodiment 3 are equivalent to those of the embodiment 1, and are higher than those of the prior art, and the description is omitted here.
The method provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the invention without departing from the inventive concept, and those improvements and modifications also fall within the scope of the claims of the invention.
Claims (10)
1. A method of making an aluminum alloy composite, comprising the steps of:
s1, adding organic silicon resin into the nano-carbon slurry, and uniformly stirring and mixing to prepare nano-carbon composite slurry;
s2, drying and sintering the nano-carbon composite slurry to prepare nano-carbon composite powder;
s3, mixing the nano-carbon composite powder with aluminum powder, and dispersing the mixed mixture into an absolute ethyl alcohol solution to prepare aluminum foil slurry;
and S4, drying the filtered solvent of the aluminum foil slurry to obtain the aluminum alloy composite material.
2. The method of claim 1, wherein the preparing of the nanocarbon paste in S1 comprises: mixing graphite worms or nano carbon powder with an organic solvent, and preparing the mixture by reaction equipment.
3. The method according to claim 2, wherein the mass parts of the graphite worms or the nano carbon powder and the organic solvent are (1-25): 100 parts.
4. The method of claim 3, wherein the graphite worms are obtained by heating expandable graphite to 400-1100 ℃ for expansion; the specific surface area of the graphite worms is more than 40m2G and a multiple expansion of more than 200.
5. The method according to claim 2, wherein the organic solvent is prepared from (2-40) parts by mass of methyl isobutyl ketone, dimethyl methanol and triethanolamine: (5-60) parts of: (4-30).
6. The method according to claim 1 or 2, wherein the mass parts of the nanocarbon slurry and the silicone resin are 100 parts: (1-30) parts;
the organic silicon resin is prepared from (1-40) parts by mass of tetraethoxysilane, absolute ethyl alcohol and dibutyl dilaurate: (2-40) parts of: (3-30).
7. The method according to claim 1, wherein the mass parts of the mixture and the absolute ethanol solution in S3 are (10-40): 100 parts of (A); the aluminum powder and the nano carbon composite powder are 100 parts by weight: (1-45).
8. The method of claim 1, wherein the mixture in S3 is ball milled by adding milling media.
9. The method according to claim 8, wherein the mass parts of the mixture and the grinding medium are (1-40): 100 parts.
10. A high strength aluminum alloy produced by the method according to any one of claims 1 to 9.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0897994B1 (en) * | 1997-08-20 | 2002-06-12 | Inco Limited | Cast-alumina metal matrix composites and method of manufacturing the same |
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