CN113046592A - In-situ synthesis device and method for aluminum-based composite material with enhanced particle gradient distribution - Google Patents
In-situ synthesis device and method for aluminum-based composite material with enhanced particle gradient distribution Download PDFInfo
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- CN113046592A CN113046592A CN202110280652.5A CN202110280652A CN113046592A CN 113046592 A CN113046592 A CN 113046592A CN 202110280652 A CN202110280652 A CN 202110280652A CN 113046592 A CN113046592 A CN 113046592A
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- 239000002245 particle Substances 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 39
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 title claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000002360 preparation method Methods 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 239000000155 melt Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims abstract description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
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- 238000001308 synthesis method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- 238000001556 precipitation Methods 0.000 abstract 1
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- 239000000203 mixture Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000009750 centrifugal casting Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011156 metal matrix composite Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
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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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
-
- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses an aluminum matrix composite in-situ synthesis device and method for reinforcing particle gradient distribution, which comprises a casting mold, a resistance furnace for in-situ synthesis of composite and a resistance furnace for gradient material preparation, wherein the casting mold is heated and insulated in the resistance furnace for gradient material preparation during preparation, then in-situ synthesis reaction of aluminum alloy and reinforcing phase particles is carried out in the resistance furnace for in-situ synthesis, a melt after the reaction is taken out and poured into the insulated casting mold in the resistance furnace for gradient material preparation, so that the reinforcing particles in the melt have time to fully perform sedimentation, and the aluminum matrix composite with particle gradient distribution can be obtained after the precipitation is finished and then taken out of the furnace for cooling and solidification.
Description
Technical Field
The invention relates to the technical field of preparation of metal matrix composite materials, in particular to an in-situ synthesis device and method for an aluminum matrix composite material with enhanced particle gradient distribution.
Background
The particle reinforced aluminum matrix composite material is one of the research hotspots of the metal matrix composite material due to the excellent performance of the particle reinforced aluminum matrix composite material, and the preparation method of the particle reinforced aluminum matrix composite material mainly comprises a liquid phase method, a solid-liquid two-phase method and a solid phase method at present. The interface of the melt matrix and the reinforcement body is easy to react during the preparation by the liquid phase method; if the wettability of the melt matrix and the reinforcement is poor, the reinforcement is difficult to incorporate and tends to carry contaminants. The in-situ synthesis method is a commonly used method for preparing the aluminum-based composite material, can eliminate the pollutants attached to the added particles in the in-situ reaction process, has no pollution on the surfaces of the obtained material particles, and solves the problem of wetting between the matrix and the reinforced particles. The in-situ synthesis process comprises the following steps: firstly heating an aluminum alloy matrix to a molten state, uniformly mixing the reinforced particles according to a proper proportion, drying, putting the mixture into a reaction molten pool, mechanically stirring, refining, removing slag, and pouring the mixture into a mold for casting molding after the reaction is finished to obtain a composite material finished product.
Compared with the common aluminum-based composite material, the aluminum-based composite material with the gradient distribution of the reinforced phase particles has the advantages of high specific strength and specific rigidity, low density, excellent wear resistance, stable transition of internal thermal stress of the material and the like, and can realize gradient layering structurally, the reinforced particles are gradually reduced from the outer wall to the inner layer, and no or a small amount of reinforced particles exist in the inner layer, so that the outer layer of the material has good mechanical properties such as higher tensile strength and the like, and is rich in more reinforced particles compared with the inner layer, high in hardness, good in thermal conductivity, good in thermal stability and excellent in wear resistance, and has application prospects in the fields of nuclear energy, electronics, optics, chemistry, electromagnetism, building curtain walls and the like which have high performance requirements on the surface of aluminum alloy.
Certainly, the gradient composite material needs to eliminate the interlayer interface and relieve the thermal stress by continuously controlling the change of the internal composition and the fine structure due to the requirement of the gradient composite material on the continuous gradient distribution of the reinforced particles, and the preparation difficulty is higher. If the traditional in-situ synthesis method is adopted to prepare the aluminum-based composite material with high surface volume fraction, because the reinforcing phase has no gradient dispersion effect, a large amount of reactants are added to synthesize the reinforcing phase, so that the surface of the material can obtain the content of the reinforcing phase required by the design, and because a large amount of microscopic particles are synthesized in the aluminum alloy matrix, the particle agglomeration phenomenon is difficult to avoid, and the phenomenon has negative influence on the mechanical property of the whole composite material. Therefore, the preparation methods of the composite materials with the particle gradient distribution commonly used at present comprise a centrifugal casting method, an external gradient strong magnetic field, a special sintering method of powder metallurgy and the like. The centrifugal casting method is not suitable for pouring and is easy to produce specific gravity segregation aluminum magnesium and other alloys, the gradient level of the enhanced phase distribution of the external magnetic field method is not high, the density of the material prepared by the powder metallurgy method is low, the combination of a matrix is poor, and pores are easy to produce. And the special sintering methods such as powder metallurgy and the like have high preparation cost and are not suitable for mass production as the preparation of the external gradient strong magnetic field.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a method for in-situ synthesis of an aluminum-based composite material with gradient particle distribution.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: an aluminum matrix composite in-situ synthesis device for enhancing particle gradient distribution comprises a resistance furnace for in-situ synthesis of composite materials and a resistance furnace for preparation of gradient materials, wherein the resistance furnace for preparation of gradient materials comprises a furnace body and a resistance wire, the resistance wire is embedded on the inner wall of the furnace body in a coiled manner, a furnace door is arranged on the furnace body, a moving seat with a round hole is arranged at two ends of the upper surface of the furnace door, a connecting piece with a round hole is arranged at a corresponding position at two ends of the other side of the furnace door, a cylindrical rod is arranged to be horizontally inserted into the round hole of the connecting piece with the round hole, a support is arranged in the furnace body, a casting mold is arranged on the support and comprises a mold body, lifting lug screws and a clamping device, a flange is arranged on the mold body, grooves are arranged at the centers of two narrow sides at the, the clamping device is also provided with a hook matched with the lifting lug screw
Preferably, the length of the inner wall of the casting mold is 200mm, the width of the inner wall of the casting mold is 150mm, the wall thickness of the inner wall of the casting mold is 5mm, the depth of the inner wall of the casting mold is 50mm, the length of the flange is 240mm, the width of the flange is 190mm, and the height of the flange is 15 mm; the lower part of the flange is inwards chamfered by 10 degrees, the nominal diameter M16 of the engagement area of the countersunk head threaded hole and the lifting lug screw is 5mm, and the integral casting die is formed by rolling 45-grade steel.
The invention also discloses a preparation method of the aluminum matrix composite material with the enhanced particle gradient distribution, which comprises the following steps:
a. heating in a gradient material preparation resistance furnace and preserving heat of a casting mold;
b. carrying out in-situ synthesis reaction of aluminum alloy and reinforced phase particles in a resistance furnace for in-situ synthesis of the composite material;
c. taking out the melt after reaction, pouring the melt into a casting mold, and preserving heat to ensure that the reinforced particles in the melt fully perform sedimentation;
d. and discharging, cooling and solidifying.
Preferably, the temperature in the step c is 700-720 ℃, and the holding time is 6 minutes.
Preferably, the cooling mode in the step d is air cooling or water cooling, and when water cooling is used, the water level is controlled to just exceed the position of the melt in the die body by combining the prepared material melt amount in advance.
The invention has the beneficial effects that:
(1) according to the invention, by utilizing the sedimentation behavior of the particles, a large amount of reinforced phase particles generated by in-situ reaction are precipitated and concentrated at the bottom of the casting mold through a novel device to form the surface of the material, so that the wear resistance of the surface of the material is effectively improved. In addition, the particle agglomeration phenomenon caused by adding a large amount of reactants and synthesizing the reinforced particles during in-situ synthesis is avoided, and the mechanical property of the inner side of the material is not negatively influenced.
(2) The gradient composite material is prepared by improving the in-situ reaction process, the preparation cost is lower than that of the common preparation methods such as a powder metallurgy method, the preparation process is simple and convenient, and the method is suitable for industrial production.
(3) The invention adopts a novel casting mould to replace the traditional mould, the mould body is placed into a gradient material preparation resistance furnace in advance to be heated and insulated, the melt is poured into the casting mould after the reaction is finished, the reaction melt is delayed to be solidified under the insulation state, the sedimentation behavior of the enhanced particles is carried out due to large density to realize gradient layering, the materials are discharged from the furnace and cooled after being settled for a certain time, the prepared materials are continuously layered and distributed from the outer layer to the inner layer, and the performance is excellent.
(4) According to the invention, the in-situ synthesis preparation equipment is optimized, so that the operation is more convenient, and the upper end of the novel casting mold can be rapidly cooled to achieve the expected particle sinking effect; meanwhile, the mode of taking the die is improved, the clamping lug screws are arranged at four corners of the upper end of the flange of the novel casting die, the special clamping device matched with the novel casting die is adopted, the groove is formed in the lower end of the flange, the moving process of the die is facilitated, and the equipment and the process have strong adaptability to workpieces and can be used for various material preparation occasions.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a resistance furnace for preparing gradient materials according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of a casting mold and a holding device thereof according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram and a schematic method flow diagram of an in-situ synthesis apparatus for an aluminum-based composite material with enhanced particle gradient distribution according to a preferred embodiment of the present invention.
The attached drawings are marked as follows:
1-crucible 2-resistance furnace for in-situ synthesis of composite material 3-mold body 4-flange 5-countersunk threaded hole 6-lifting lug screw 7-groove 8-clamping device 9-furnace body 10-furnace door 11-moving seat with round hole 12-cylindrical rod 13-connecting piece with round hole 14-support 15-resistance wire 16-gradient material preparation resistance furnace 17-casting mold.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1-3, in a preferred embodiment of the present invention, an in-situ synthesis apparatus for aluminum-based composite materials with enhanced particle gradient distribution comprises a resistance furnace 2 for in-situ synthesis of composite materials and a resistance furnace 16 for gradient material preparation, wherein the resistance furnace 16 for gradient material preparation comprises a furnace body 9 and a resistance wire 15, the resistance wire 15 is embedded on the inner wall of the furnace body 9 in a coiled manner, a furnace door 10 is arranged on the furnace body 9, moving seats 11 with round holes are arranged at two ends of the upper surface of the furnace door 10, connecting members 13 with round holes are arranged at corresponding positions at two ends of the other side, two cylindrical rods 12 are configured to be tightly inserted along the direction of the corresponding center lines of the two round holes of the connecting members 13 with round holes, the cylindrical rods 12 are pushed to drive the semicircular furnace door 10 to rotate, horizontally open and close along the connecting members 13 with round holes, a support 14 is arranged in the furnace, the casting die is characterized in that a casting die 17 is arranged on the support 14, the casting die 17 is placed on the upper portion of the support 14 in the middle when being heated so that the lifting lug screw 6 is right opposite to the furnace opening, the casting die 17 comprises a die body 3, the lifting lug screw 6 and a clamping device 8, a flange 4 is arranged on the die body 3, a groove 7 is formed in the center of two narrow sides of the lower end of the flange 4, the groove 7 is used for moving and tilting the casting die 17, countersunk head threaded holes 5 matched with the lifting lug screw 6 are formed in four corners of the upper end of the flange 4, and hooks matched with the lifting lug screw 6 are further arranged on the clamping device 8.
According to the invention, by utilizing the sedimentation behavior of particles, a large amount of reinforced phase particles generated by in-situ reaction are precipitated and concentrated at the bottom of the casting mold 17 through a novel device, so that the surface of the material is formed, the wear resistance of the surface of the material is effectively improved, in addition, the particle agglomeration phenomenon caused by adding a large amount of reactants and synthesizing the reinforced particles during in-situ synthesis is avoided, and the mechanical property of the inner side of the material is ensured not to be negatively influenced; the gradient composite material is prepared by improving the in-situ reaction process, the preparation cost is lower than that of the preparation method of a common powder metallurgy method and the like, the preparation process is simple and convenient, the traditional mold is replaced by a novel casting mold 17, the mold body 3 is placed into a gradient material preparation resistance furnace 16 in advance for heating and heat preservation, the melt is poured into the casting mold 17 after the reaction is finished, the reaction melt is delayed to solidify under the heat preservation state, the sedimentation behavior of the enhanced particles due to high density is realized by gradient layering, the particles are discharged from the furnace for cooling after being settled for a certain time, the prepared material is continuously layered from the outer layer to the inner layer, and the performance is excellent; the operation is more convenient and fast through the optimization of in-situ synthesis preparation equipment, the upper end of the novel casting mold 17 adopts the design of the flange 4 baffle, water drops can be effectively prevented from splashing under the condition of water cooling, a certain distance is kept between the water surface and the opening of the casting mold 17 when the outer wall of the casting mold 17 in the composite material melt area is completely soaked by water, and the rapid cooling is realized to achieve the expected particle sinking effect; meanwhile, the use mode of the casting die 17 is improved, lifting lug screws 6 are arranged at four corners of the upper end of the flange 4 of the novel casting die 17, a special clamping device 8 matched with the lifting lug screws is adopted, and a groove 7 is formed in the lower end of the flange 4, so that the moving process of the die body 3 is facilitated; the equipment and the process have strong adaptability to workpieces and can be used for various material preparation occasions.
Specifically, the resistance furnace 2 for in situ synthesis of composite materials of the present invention is a general standard component or a component known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through a technical manual or through a conventional experimental method, and those skilled in the art can flexibly select the resistance furnace according to the needs, and will not be described in detail herein.
As a preferred embodiment of the present invention, it may also have the following additional technical features:
in the embodiment, the length of the inner wall of the casting mold 17 is 200mm, the width thereof is 150mm, the wall thickness thereof is 5mm, the depth thereof is 50mm, and the length of the flange 4 is 240mm, the width thereof is 190mm, and the height thereof is 15 mm; the following position of flange 4 is inwards reverse mould 10 °, countersunk head screw hole 5 with lug screw 6 meshing area nominal diameter M16, fillet size R5 mm, whole casting die utensil 17 is rolled by 45 grades of steel and is formed for casting die utensil possesses advantages such as high temperature resistant, increase of service life and make operating condition more stable.
The invention also discloses a preparation method of the aluminum matrix composite material with the enhanced particle gradient distribution, which comprises the following steps:
a. heating and insulating a casting mould 17 in a gradient material preparation resistance furnace 16;
b. carrying out in-situ synthesis reaction of the aluminum alloy and the reinforced phase particles in the resistance furnace 2 for in-situ synthesis of the composite material;
c. taking out the melt after reaction, pouring the melt into a casting mold 17 for heat preservation, and fully performing sedimentation on the reinforced particles in the melt;
d. and discharging, cooling and solidifying.
In this embodiment, the temperature in step c is 700-.
In this embodiment, the cooling mode in step d is air cooling or water cooling, and when water cooling is used, the water level is controlled to just exceed the position of the melt in the mold body 3 by combining the prepared material melt amount in advance.
The specific implementation process of the invention comprises the following steps:
firstly, two clamping devices 8 are used for respectively clamping lifting lug screws 6 corresponding to two sides of a casting mould 17, the casting mould 17 is conveyed to a support 14 in a gradient material preparation resistance furnace 16, and heating and heat preservation are started at a set temperature of 720 ℃. Adding AA6061 matrix aluminum alloy matrix into a crucible 1, placing the crucible 1 on a support in a resistance furnace 2 for in-situ synthesis of composite materials, heating until the aluminum alloy is molten, taking a thermocouple to monitor the temperature of the melt to 850 ℃, adding KBF mixed in proportion4And K2ZrF6Particles, and the reaction is fully carried out by mechanical stirring; after the reaction is finished, adding a refining agent and slagging off when the temperature of the melt is reduced to 750 ℃, taking out the crucible 1 when the temperature of the melt is quickly reduced to 720 ℃, quickly pouring the reaction melt into the mold main body 3 of the heat-insulating casting mold 17 in the gradient material preparation resistance furnace 16, keeping the temperature in the range of 700 ℃ to 720 ℃ for 6 minutes until the particles are completely precipitated, then using the clamping device 8 to carry the casting mold 17 to a water tank for water cooling, simultaneously cooling the casting mold 17 and the composite material melt, and pouring out after the material is solidified to obtain the aluminum-based composite material with the particle gradient distribution.
In the examples, unless otherwise specified, the methods employed are conventional and the starting materials are commercially available from the open literature.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (5)
1. The utility model provides an aluminium base composite material normal position synthesis device of reinforcing granule gradient distribution which characterized in that: the device comprises a resistance furnace (2) for in-situ synthesis of composite materials and a resistance furnace (16) for preparation of gradient materials, wherein the resistance furnace (16) for preparation of the gradient materials comprises a furnace body (9) and a resistance wire (15), the resistance wire (15) is embedded on the inner wall of the furnace body (9) in a coiled manner, a furnace door (10) is arranged on the furnace body (9), a round hole moving seat (11) is arranged at two ends of the upper surface of the furnace door (10), a round hole connecting piece (13) is arranged at the corresponding position of two ends of the other side, a cylindrical rod (12) is configured to be horizontally inserted into a round hole of the round hole connecting piece (13), a support (14) is arranged in the furnace body (9), a casting mold (17) is arranged on the support (14), the casting mold (17) comprises a mold body (3), a screw (6) and a clamping device (8), a, the clamping device is characterized in that grooves (7) are formed in the center positions of two narrow sides of the lower end of the flange (4), countersunk threaded holes (5) matched with the lifting lug screws (6) are formed in the four corners of the upper end of the flange (4), and hooks matched with the lifting lug screws (6) are further arranged on the clamping device (8).
2. The in-situ synthesis device for the aluminum-based composite material with the enhanced particle gradient distribution as recited in claim 1, wherein: the length of the inner wall of the casting mould (17) is 200mm, the width is 150mm, the wall thickness is 5mm, the depth is 50mm, and the length, the width and the height of the flange (4) are 240mm, 190mm and 15 mm; the lower part of the flange (4) is subjected to inward die-reversing by 10 degrees, the nominal diameter M16 of the meshing area of the countersunk head threaded hole (5) and the lifting lug screw (6) is obtained, the fillet size R is 5mm, and the integral casting die (17) is formed by rolling 45-grade steel.
3. An in-situ synthesis method of an aluminum-based composite material with enhanced particle gradient distribution is characterized by comprising the following steps: the method comprises the following steps:
a. heating and insulating a casting mould (17) in a gradient material preparation resistance furnace (16);
b. carrying out in-situ synthesis reaction of aluminum alloy and reinforced phase particles in a resistance furnace (2) for in-situ synthesis of the composite material;
c. taking out the melt after reaction, pouring the melt into a casting mold (17) for heat preservation, and fully performing sedimentation action on the reinforced particles in the melt;
d. and discharging, cooling and solidifying.
4. The in-situ synthesis method of the aluminum-based composite material with the enhanced particle gradient distribution as claimed in claim 3, characterized in that: the heat preservation temperature in the step c is 700-720 ℃, and the heat preservation time is 6 minutes.
5. The method for preparing the aluminum matrix composite material with the gradient-distributed particles through in-situ synthesis according to claim 3, wherein the method comprises the following steps: and d, selecting air cooling or water cooling as a cooling mode in the step d, and controlling the water level to be just over the position of the melt in the die body (3) by combining the prepared material melt quantity in advance when the water cooling is used.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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