CN116219214A - Preparation process of silicon carbide reinforced zinc-based composite material - Google Patents
Preparation process of silicon carbide reinforced zinc-based composite material Download PDFInfo
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 239000011701 zinc Substances 0.000 title claims abstract description 39
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 31
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000000748 compression moulding Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000012065 filter cake Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000011812 mixed powder Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000001291 vacuum drying Methods 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 10
- 229910001297 Zn alloy Inorganic materials 0.000 description 8
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 7
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 7
- 239000011777 magnesium Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000011156 metal matrix composite Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a preparation process of a silicon carbide reinforced zinc-based composite material, which comprises the following preparation steps: s1, preparing the following raw materials in percentage by weight: 65 to 70 percent of zinc powder, 25 to 30 percent of aluminum powder, 2 to 4.5 percent of copper powder, 0.2 to 1.2 percent of magnesium powder and 0.5 to 3.5 percent of silicon carbide particles; s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, putting the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into a dispersion solution, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A; s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B; s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C; s5, uniformly heating the inside and outside of the die and the powder block C in an oxygen-isolated manner, so that the powder block C in the die becomes semi-solid. The invention has simple preparation flow, fully improves the wear resistance of the material and reduces the friction coefficient, thereby enhancing the use characteristics of the prepared parts, prolonging the service life of the parts and reducing the manufacturing cost.
Description
Technical Field
The invention relates to the technical field of metal material casting, in particular to a preparation process of a silicon carbide reinforced zinc-based composite material.
Background
More than 60% of zinc in the market is used as galvanization, about 20% is used for die casting low-end products, and 5% of zinc alloy is used for mechanical industry and mainly comprises structural members such as gears, worm gears, bearing bushes, shaft sleeves, riding wheels and the like. The mechanical properties, especially the wear resistance, of the zinc alloy are required to be high, the requirements of customers on the high wear resistance and the high-temperature mechanical properties of the zinc alloy are known in the research process of zinc alloy mechanical parts manufacturers in the early stage, and the novel wear-resistant zinc alloy material is expected to replace the traditional alloy material at present, so that the service life of the mechanical parts is prolonged, and the market demand of the zinc-based composite material is shown. Composite materials have excellent strength and stiffness, high temperature service and improved wear resistance and are therefore widely used in a variety of end use industries.
Because of the problem of poor mechanical properties of zinc alloy, a preparation process of a silicon carbide reinforced zinc-based composite material is developed, and the optimal preparation process of the zinc-based composite material is sought by researching the tensile property and the wear resistance of the zinc-based composite material, optimizing a semi-solid casting process and a hot extrusion molding process of the zinc-based composite material; in view of this, we propose a preparation process of a silicon carbide reinforced zinc-based composite material for enhancing the interfacial bonding effect between silicon carbide particles and a zinc matrix, thereby improving the mechanical properties of the silicon carbide reinforced zinc-based composite material.
Disclosure of Invention
The invention aims at solving the problems that the market in the background technology has large demand for composite materials, but the metal matrix composite material has higher production technical threshold, domestic large-scale metal matrix composite material production enterprises are fewer, the market supply and demand are unbalanced and the like, and provides a preparation process of a silicon carbide reinforced zinc matrix composite material for enhancing the interface bonding effect between silicon carbide particles and a zinc matrix, thereby improving the mechanical property of the silicon carbide reinforced zinc matrix composite material.
The technical scheme of the invention is as follows: a preparation process of a silicon carbide reinforced zinc-based composite material comprises the following preparation steps:
s1, preparing the following raw materials in percentage by weight: 65 to 70 percent of zinc powder, 25 to 30 percent of aluminum powder, 2 to 4.5 percent of copper powder, 0.2 to 1.2 percent of magnesium powder and 0.5 to 3.5 percent of silicon carbide particles;
s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, putting the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into a dispersion solution, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A;
s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B;
s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C;
s5, uniformly heating the inside and outside of the die and the powder block C to isolate oxygen, so that the powder block C in the die becomes semi-solid, pressurizing again, and maintaining for 3-5min to prepare the required reinforced zinc-based alloy material containing silicon carbide particles.
Preferably, in S2, the dispersion solution is an anhydrous and easily volatile liquid, and the dispersion solution is ethanol or propanol.
Preferably, the liquid-solid ratio of the dispersion solution to zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles is 2-4:1.
Preferably, the particle sizes of zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles in the raw materials are all smaller than 0.074mm.
Preferably, in the step S4, the molding pressure of the compression molding is more than 150MPa, and the pressure maintaining time is 3-5min.
Compared with the prior art, the invention has the following beneficial technical effects:
in view of the physicochemical characteristics between the matrix and the reinforcement of the silicon carbide particle reinforced zinc-aluminum matrix composite material, the invention fully exerts the advantages of various processes, comprehensively considers the optimal matching relation between the silicon carbide particle content, the process parameter stirring temperature, the stirring speed, the ultrasonic power and the like and the mechanical property and the friction and wear property of the finally prepared composite material, establishes an optimal process system for preparing the silicon carbide particle reinforced zinc-aluminum matrix composite material, and successfully prepares the silicon carbide particle reinforced zinc-aluminum matrix composite material with excellent uniform dispersion property of the nano reinforcement particles;
based on the characteristic of difficult mutual solubility of an internal reinforcement body-matrix of the silicon carbide particle reinforced zinc-aluminum-based composite material, a semi-solid casting research method is introduced, so that the mechanical property of the silicon carbide particle reinforced zinc-aluminum-based composite material is improved, the optimal process for preparing the silicon carbide particle reinforced zinc-aluminum-based composite material is mastered, and the technical problem in the industry field is solved;
in summary, the preparation flow of the silicon carbide particle reinforced zinc-aluminum matrix composite material provided by the invention is simple, the wear resistance of the material is fully improved, and the friction coefficient is reduced, so that the use characteristics of prepared parts are enhanced, the service life of the parts is prolonged, and the enterprise cost is reduced.
Drawings
FIG. 1 shows a schematic flow chart of a preparation process of a silicon carbide reinforced zinc-based composite material.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Example 1
As shown in figure 1, the preparation process of the silicon carbide reinforced zinc-based composite material provided by the invention adopts a form of uniformly dispersing an anhydrous dispersion solution, so that the components of the material are uniform and have no segregation; the preparation method specifically comprises the following preparation steps:
s1, preparing raw materials: the raw materials comprise the following components in percentage by weight: 69.83% of zinc powder, 27.13% of aluminum powder, 2.22% of copper powder, 0.21% of magnesium powder and 0.61% of silicon carbide particles, wherein the zinc powder meets the standard requirement of 0# zinc, the copper powder meets the cathode copper requirement, and the chemical components of the magnesium powder meet the quality requirement of Mg 9999;
s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, and filling the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into ethanol, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A;
s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B;
s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C;
s5, uniformly heating the inside and outside of the die and the powder block C to isolate oxygen, enabling the powder block C in the die to be semi-solid, pressurizing again, maintaining for 5min, and finally cooling and forming to obtain the required reinforced zinc-based alloy material containing silicon carbide particles.
Example two
As shown in figure 1, the preparation process of the silicon carbide reinforced zinc-based composite material provided by the invention adopts a form of uniformly dispersing an anhydrous dispersion solution, so that the components of the material are uniform and have no segregation; the preparation method specifically comprises the following preparation steps:
s1, preparing raw materials: the raw materials comprise the following components in percentage by weight: 68.98% of zinc powder, 27.38% of aluminum powder, 2.28% of copper powder, 0.53% of magnesium powder and 0.83% of silicon carbide particles, wherein the zinc powder meets the standard requirement of 0# zinc, the copper powder meets the cathode copper requirement, and the chemical components of the magnesium powder meet the quality requirement of Mg 9999;
s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, and filling the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into ethanol, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A;
s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B;
s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C;
s5, uniformly heating the inside and outside of the die and the powder block C to isolate oxygen, enabling the powder block C in the die to be semi-solid, pressurizing again, maintaining for 5min, and finally cooling and forming to obtain the required reinforced zinc-based alloy material containing silicon carbide particles.
Example III
Based on the first or second embodiment, the silicon carbide reinforced zinc-based composite material of the embodiment adopts a form of uniformly dispersing an anhydrous dispersion solution, so that the components of the material are uniform and have no segregation; and the aluminum foil wrapping is adopted for direct adding, and the method specifically comprises the following steps:
s1, preparing raw materials: the raw materials comprise the following components in percentage by weight: 68.72% of zinc powder, 26.58% of aluminum powder, 2.53% of copper powder, 0.82% of magnesium powder and 1.35% of silicon carbide particles, wherein the zinc powder meets the standard requirement of 0# zinc, the copper powder meets the cathode copper requirement, and the chemical components of the magnesium powder meet the quality requirement of Mg 9999;
s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, and filling the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into ethanol, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A;
s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B;
s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C;
s5, uniformly heating the inside and outside of the die and the powder block C to isolate oxygen, enabling the powder block C in the die to be semi-solid, pressurizing again, maintaining for 5min, and finally cooling and forming to obtain the required reinforced zinc-based alloy material containing silicon carbide particles.
Comparative example one:
the raw materials are proportioned, and 70.14% of 0# zinc ingot, 27.28% of aluminum ingot, 2.56% of copper wire and 0.02% of magnesium ingot are weighed according to weight percentage.
Processing aluminum ingot and magnesium ingot into small blocks of 10-30mm, processing copper wire into small grains of 1-5mm,
after the No. 0 zinc ingot is melted, adding aluminum ingots, magnesium ingots, copper granules and the like required by alloy preparation into zinc liquid, introducing nitrogen for protection, stirring for 15-30min, and casting into zinc alloy blocks after the alloy elements are fully melted.
The zinc alloy block is used by a simulation client, melted again to be in a semi-solid state, injected into a die for detecting a sample, pressurized at 750Mpa and maintained for 5min.
The silicon carbide reinforced zinc-based composite materials prepared in the first to third embodiments of the present invention and the material prepared in the first comparative example were subjected to experiments on properties, respectively, in which the experimental items were: hardness, compressive strength, tensile strength, wear rate and elongation:
the hardness detection adopts a sawing machine or a wire cutting machine to sample on a blank according to the requirements of each section, samples with uneven sizes of a measuring surface and a base surface are prepared into embedded samples, then the embedded samples are mechanically polished and corroded, and finally absolute ethyl alcohol is used for flushing and then measuring; the sample to be measured is measured by adopting an HV-1000/HV-1000A micro-hardness tester, the hardness tester selects the test force level to be 1.961N and selects the hardness to be within the HV0.5 range during measurement, the indication allowable error is +/-4.0%, and the duration time is 10s;
compressive strength detection: the room temperature compression test of the composite material is carried out on a WE-100 hydraulic universal material tester according to the national standard of GB/T7314-2017 metal material room temperature compression test method, and the displacement loading speed is 1mm/min. The preparation process of the compression performance test sample is as follows: firstly, cutting a cylindrical sample with phi 8 multiplied by 15mm by using an electric spark line; secondly, polishing the compressed contact surfaces at the two ends of the sample by using 1500# abrasive paper to ensure that the upper plane and the lower plane are parallel and remove surface defects such as scratches on the surface of the sample; washing the contact surfaces to be compressed at the two ends of the sample with absolute ethyl alcohol again; and finally, drying by using an electric blower, and placing the dried product on a compression experiment platform for testing.
Tensile strength detection: an INSTRON3380 electronic universal material tester was used. The rated load of the electronic universal material testing machine is 500kN, the displacement control precision is 0.06 mu m, the thickness of a tensile sample is about 1mm, the length of the sample is about 12mm, the length of a deformation zone is about 6mm, the tensile rate is 0.02mm/min, each group of samples is tested at least 5 times, and the average value is taken as an experimental result;
and (3) abrasion rate detection: before the friction and abrasion test is carried out on the sample, the surface to be rubbed is polished and flattened by using 1000# abrasive paper, then the surface to be rubbed is washed and cleaned by using absolute ethyl alcohol, and finally the surface to be rubbed is dried by using an electric blower. The grinding disc rotating speed of the friction and wear experimental device can realize stepless speed change of 0-1400 rpm, and the sliding speed change range in the friction process of the disc pin is 0-14.75 m/s; the loading load range of friction wear is 28-140N, and the positive stress loading range of the sample in the friction wear process is 0.6-2.8 MPa; each sample is subjected to experiments for 5 times, two end values with the largest difference and the smallest difference in the experiments are removed, 3 times of measured values in the middle area are taken for averaging, and the average value is used as a final result;
the following data were obtained experimentally:
in conclusion, the hardness of the silicon carbide reinforced zinc-based composite material obtained by the preparation process disclosed by the invention is above 160HV, the compressive strength is improved by above 40%, the tensile strength is improved by above 30%, the silicon carbide reinforced zinc-based composite material is obviously superior to the composite material prepared by the existing silicon carbide-free process in the market, in addition, the abrasion coefficient of the silicon carbide reinforced zinc-based composite material is obviously improved, and the minimum abrasion coefficient can reach 0.0112g/s.
The above-described embodiments are merely a few preferred embodiments of the present invention, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present invention and the related teachings of the above-described embodiments.
Claims (5)
1. A preparation process of a silicon carbide reinforced zinc-based composite material is characterized by comprising the following steps of: the preparation method comprises the following preparation steps:
s1, preparing the following raw materials in percentage by weight: 65 to 70 percent of zinc powder, 25 to 30 percent of aluminum powder, 2 to 4.5 percent of copper powder, 0.2 to 1.2 percent of magnesium powder and 0.5 to 3.5 percent of silicon carbide particles;
s2, weighing zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles, putting the zinc powder, the aluminum powder, the copper powder, the magnesium powder and the silicon carbide particles into a dispersion solution, and fully stirring and dispersing the mixture to obtain a uniformly mixed and dispersed suspension A;
s3, filtering the suspension A, and performing vacuum drying treatment on a filter cake obtained by filtering to obtain uniformly mixed powder B;
s4, placing the powder B in a die, and performing compression molding treatment to obtain a pressed powder block C;
s5, uniformly heating the inside and outside of the die and the powder block C to isolate oxygen, so that the powder block C in the die becomes semi-solid, pressurizing again, and maintaining for 3-5min to prepare the required reinforced zinc-based alloy material containing silicon carbide particles.
2. The process for preparing a silicon carbide reinforced zinc-based composite material according to claim 1, wherein in S2, the dispersion solution is an anhydrous and easily volatile liquid, and the dispersion solution is ethanol or propanol.
3. The process for preparing a silicon carbide reinforced zinc-based composite material according to claim 2, wherein the liquid-solid ratio of the dispersion solution to zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles is 2-4:1.
4. The process for preparing a silicon carbide reinforced zinc-based composite material according to claim 1, wherein the particle sizes of zinc powder, aluminum powder, copper powder, magnesium powder and silicon carbide particles in the raw materials are all smaller than 0.074mm.
5. The process for preparing a silicon carbide reinforced zinc-based composite material according to claim 1, wherein in the step S4, the molding pressure of compression molding is more than 150MPa, and the dwell time is 3-5min.
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2022
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| CN109881046A (en) * | 2019-03-18 | 2019-06-14 | 武汉科技大学 | A kind of nano silicon carbide granulate enhancing Zn Al Alloy Matrix Composites and preparation method thereof |
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