CN113215469A - Method and device for manufacturing high-entropy alloy additive - Google Patents
Method and device for manufacturing high-entropy alloy additive Download PDFInfo
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- CN113215469A CN113215469A CN202110542552.5A CN202110542552A CN113215469A CN 113215469 A CN113215469 A CN 113215469A CN 202110542552 A CN202110542552 A CN 202110542552A CN 113215469 A CN113215469 A CN 113215469A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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- 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
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- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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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
- C22C1/02—Making non-ferrous alloys by melting
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention provides a method for manufacturing a high-entropy alloy additive, which comprises the following steps of: selecting initial raw materials; wherein, the raw materials are powder; injecting the initial powder into a grinding tank, and grinding the initial powder by using a ball milling device; injecting gas into the grinding tank, and continuously grinding the initial powder by using a grinding device to obtain composite powder; and preparing the alloy profile by using the composite powder. The invention provides a method and a device for manufacturing a high-entropy alloy additive, which are used for reinforcing and toughening aluminum alloy by using a high-entropy alloy as a reinforcing phase, so that the traditional ceramic reinforcing and toughening conditions are broken through, and the strength and plasticity of a composite material are improved at the same time.
Description
Technical Field
The invention relates to the technical field of entropy alloy additive manufacturing, in particular to a method and a device for high-entropy alloy additive manufacturing.
Background
The particle reinforced aluminum matrix composite material has excellent performances of high specific strength, high specific modulus, good wear resistance, good size stability and the like. However, the conventional ceramic particle reinforced aluminum matrix composite has poor plasticity and toughness, which limits the application of the composite in structural materials. How to obtain good plasticity and toughness while improving the strength of the composite material is a goal pursued by researchers.
The multi-principal-element high-entropy alloy is a brand-new alloy system, and the unique microstructure of the multi-principal-element high-entropy alloy enables the high-entropy alloy to have high hardness, high strength, wear resistance, corrosion resistance, high-temperature thermal stability, special magnetic properties, special electric properties and other excellent properties. The interface wettability and the interface compatibility between the high-entropy alloy and the aluminum alloy matrix are good due to the natural interface bonding characteristic between metal and metal. If the high-entropy alloy can be used as a reinforcing phase to reinforce and toughen the aluminum alloy, the traditional ceramic reinforcing and toughening conditions are broken through, and the strength and plasticity of the composite material are improved at the same time.
However, a method for preparing a high-strength and high-toughness aluminum matrix composite material by adopting a high-entropy alloy powder reinforcing phase is not available so far.
Disclosure of Invention
The invention provides a method and a device for manufacturing a high-entropy alloy additive, which are used for reinforcing and toughening aluminum alloy by using a high-entropy alloy as a reinforcing phase, so that the traditional ceramic reinforcing and toughening conditions are broken through, and the strength and plasticity of a composite material are improved at the same time.
The invention provides a method for manufacturing a high-entropy alloy additive, which comprises the following steps of:
selecting initial raw materials; wherein, the raw materials are powder;
injecting the initial powder into a grinding tank, and grinding the initial powder by using a ball milling device;
injecting gas into the grinding tank, and continuously grinding the initial powder by using a grinding device to obtain composite powder;
and preparing the alloy profile by using the composite powder.
Preferably, the starting materials comprise: al powder, Co powder, Cr particles, Fe blocks, Cu powder and Ni powder.
Preferably, the preparing and forming an alloy profile by using the composite powder further comprises:
and carrying out cold pressing, smelting and heat preservation on the composite powder, and then carrying out extrusion forming by using extrusion equipment to obtain the alloy section.
Preferably, the preparing and forming an alloy profile by using the composite powder further comprises:
1) pressing the composite powder into an alloy block by using a powder tablet press;
2) placing the alloy block into a smelting furnace for smelting; wherein the melting point is 350-680 ℃, and the boiling point is 2485-2618 ℃;
3) pouring the melt obtained by smelting into a crucible for cooling;
4) repeating steps 2) -3) five times, after which the melt obtained is poured into a mould for extrusion and shaped.
Preferably, the device comprises a grinding device and a pressing device, wherein the grinding device comprises a grinding barrel and a grinding mechanism, the grinding barrel is used for containing the initial powder and grinding the initial powder through the grinding mechanism;
the extrusion equipment is used for extruding and forming the melt obtained by smelting into a section.
Preferably, a cover body is arranged on the grinding barrel, and a pressure pipeline is arranged on the cover body and used for pressurizing or decompressing the grinding barrel; the grinding barrel is provided with a gas transmission pipeline, and the gas transmission pipeline is used for injecting nitrogen into the grinding barrel;
the cover body is used for opening or closing the opening part of the grinding barrel.
Preferably, a grinding shaft is arranged in the grinding barrel, and one end of the grinding shaft penetrates through the bottom of the grinding barrel and is connected with a motor;
the bottom of grinding barrel still the interval is provided with a plurality of landing legs, one of them side of grinding barrel is provided with the discharge gate, the discharge gate is close to the bottom surface in the grinding barrel, the discharge gate is used for communicating the powder tablet press through the pipeline.
Preferably, the pressing apparatus includes: the support base is provided with a U-shaped structure supporting seat above the base, an opening of the U-shaped structure of the supporting seat faces upwards, a cushion block which can be detached through a bolt is arranged at the bottom of a U-shaped structure groove of the supporting seat, and the U-shaped groove of the U-shaped structure is a sliding groove and is used for arranging a sliding rod which moves back and forth in the sliding groove; a cover plate is arranged above the supporting seat, one surface, far away from the supporting seat, of the cover plate is connected with a driving assembly through a sliding plate, the driving end of the driving assembly is used for pushing a pushing assembly, and the pushing assembly is used for pushing a pushing block to perform alloy forming in a forming assembly; the push assembly includes: the push block comprises a push rod, a top plate, a first hinge shaft, an extension bottom plate and a second assembly hole, wherein one surface of the top plate is connected with the rotary rod with an L structure, the center of the rotary rod is hinged in a notch of a U-shaped frame through the first hinge shaft, one side of the U-shaped frame, which is far away from the push block, is provided with the extension bottom plate, and the upper surface of the extension bottom plate is used for being connected with the first assembly holes arranged at intervals on the slide rod through bolts; a second ejecting block extending upwards is arranged in a U-shaped groove on one side, close to the pushing block, of the U-shaped frame, the second ejecting block is used for being in contact with one side, close to the first hinged shaft, of the rotating rod, a second assembling hole with a strip-shaped notch structure is arranged at one end, far away from the top plate, of the rotating rod, the second assembling hole is rotatably arranged on the circumferential outer wall of the second hinged shaft, two ends of the second hinged shaft are fixed on a third movable groove of the connecting block, the third movable groove is arranged towards one side of the pushing block, and the other end of the connecting block is connected with a pushing rod of the driving assembly; the drive assembly includes: the connecting block comprises a shell and a push rod, wherein a movable cavity is arranged in the shell, and one end of the push rod, which is far away from the connecting block, reciprocates in the movable cavity; a first conversion head is arranged at one end, close to the connecting block, of the shell, a second conversion head is arranged at the other end of the shell, and the first conversion head and the second conversion head are respectively connected with a pump; one ends, far away from the pump, of the first conversion head and the second conversion head are communicated with a movable cavity of the shell and used for driving a piston of the push rod, which is positioned in the movable cavity; the lower part of the shell is fixed on the upper surface of the cover plate through a sliding plate, and the forming assembly is positioned on one side, close to the push block, of the base.
Preferably, the molding assembly comprises: extrusion platform, the base is close to one side of ejector pad is provided with extrusion platform, extrusion platform's bilateral symmetry is provided with the shaping baffle, the shaping baffle with extrusion platform forms the shaping groove, the top in shaping groove is provided with the crucible pipeline, the crucible pipeline is used for injecting the fuse-element into in the shaping groove, one side that the shaping groove is close to the base is used for ejector pad reciprocating motion, the opposite side in shaping groove is provided with and is used for sealing side open-ended striker plate, the top of striker plate is connected with the telescopic link, the drive end of flexible motor is connected to the telescopic link, flexible motor passes through the horizontal pole to be fixed the circumference lateral wall of crucible pipeline.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
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 principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic view of a polishing apparatus according to the present invention;
FIG. 2 is a schematic perspective view of an extrusion apparatus according to the present invention;
FIG. 3 is a schematic cross-sectional view of an extrusion apparatus according to the present invention;
FIG. 4 is a schematic top view of the extrusion apparatus of the present invention;
FIG. 5 is a schematic view of the forming platform of the extrusion apparatus of the present invention;
FIG. 6 is a schematic view of an extended base plate of the extrusion apparatus of the present invention;
wherein, 1-grinding barrel, 2-cover, 3-grinding shaft, 4-grinding blade, 5-gas transmission pipeline, 6-pressure pipeline, 7-discharge port, 8-motor,
9-base, 10-first assembly hole, 11-bolt, 12-first top block, 13-first movable groove, 14-second movable groove, 15-top plate, 16-rotating rod, 17-first hinge shaft, 18-second assembly hole, 19-second hinge shaft, 20-connecting block, 21-first conversion head, 22-housing, 23-push rod, 24-second conversion head, 25-sliding rod, 26-sliding groove, 27-cushion block, 28-U-shaped frame, 29-trapezoidal surface, 30-cover plate, 31-third movable groove, 32-push block, 33-forming groove, 34-forming baffle, 35-crucible pipe, 36-cross rod, 37-telescopic motor, 38-telescopic rod, 39-striker plate, 40-extrusion platform, 41-supporting seat, 42-extension bottom plate and 43-second top block.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
According to fig. 1 to 6, an embodiment of the present invention provides a method for additive manufacturing of a high-entropy alloy, including the following steps:
selecting initial raw materials; wherein, the raw materials are powder;
injecting the initial powder into a grinding tank, and grinding the initial powder by using a ball milling device;
injecting gas into the grinding tank, and continuously grinding the initial powder by using a grinding device to obtain composite powder;
preparing and forming an alloy section by using the composite powder, carrying out cold pressing, smelting and heat preservation on the composite powder, and then carrying out extrusion forming by using extrusion equipment to obtain an alloy section;
further, the method also comprises the following steps:
1) pressing the composite powder into an alloy block by using a powder tablet press;
2) placing the alloy block into a smelting furnace for smelting; wherein the melting point is 350-680 ℃, and the boiling point is 2485-2618 ℃;
3) pouring the melt obtained by smelting into a crucible for cooling;
4) repeating steps 2) -3) five times, after which the melt obtained is poured into a mould for extrusion and shaped.
The initial raw materials comprise: al powder, Co powder, Cr particles, Fe blocks, Cu powder and Ni powder.
The invention provides a method and a device for manufacturing a high-entropy alloy additive, which are used for reinforcing and toughening aluminum alloy by using a high-entropy alloy as a reinforcing phase, so that the traditional ceramic reinforcing and toughening conditions are broken through, and the strength and plasticity of a composite material are improved at the same time.
The method provided by the invention has the following advantages: the process is simple, the production is easy, and the yield is obviously improved; utilize extrusion equipment to carry out direct extrusion to and through grinding initial raw materials, the organizational structure stability of the composite powder that realizes obtaining is higher, and, its initial raw materials is through grinding the back, and raw materials utilization ratio effectively improves, can effectively improve the production output of entropy alloy.
Specifically, the purity of AL powder is 99.9 wt.%, the purity of Co powder is 99.9 wt.%, the purity of Cr particles is 99.9 wt.%, the purity of Fe blocks is 99.5 wt.%, the purity of Cu powder is 99.99 wt.%, and the purity of Ni powder is 99.99 wt.%. Weighing the initial alloy raw materials according to the molar ratio of each alloy element, wherein the total mass of the raw materials is 1.2 kg; wherein the proportion is 2 parts of AL powder, 1 part of Co powder, 1 part of Cr particles, 0.8 part of Fe blocks, 1 part of Cu powder and 1.5 parts of Ni powder; the method comprises the following steps of grinding the initial raw materials of the components by using a grinding device to obtain composite powder, smelting the composite powder to obtain a melt, and finally carrying out extrusion forming by using extrusion equipment to obtain a composite section, so that the aim of streamlined operation is fulfilled, the utilization rate of the raw materials is effectively improved, and the production yield of the entropy alloy can be effectively improved.
The invention also comprises a device, which comprises a grinding device and an extrusion device, wherein the grinding device comprises a grinding barrel 1 and a grinding mechanism, and the grinding barrel 1 is used for containing the initial powder and grinding the initial powder through the grinding mechanism; the extrusion equipment is used for extruding and forming the melt obtained by smelting into a section.
A cover body 2 is arranged on the grinding barrel 1, a pressure pipeline 6 is arranged on the cover body 2, and the pressure pipeline 6 is used for pressurizing or decompressing the grinding barrel 1; the grinding barrel 1 is provided with a gas transmission pipeline 5, and the gas transmission pipeline 5 is used for injecting nitrogen into the grinding barrel 1; the lid body 2 is used to open or close the opening of the grinding barrel 1.
A grinding shaft 3 is arranged in the grinding barrel 1, and one end of the grinding shaft 3 penetrates through the bottom of the grinding barrel 1 and is connected with a motor 8; the bottom of grinding barrel 1 still the interval is provided with a plurality of landing legs, one of them side of grinding barrel 1 is provided with discharge gate 7, discharge gate 7 is close to bottom surface in the grinding barrel 1, discharge gate 7 is used for communicating the powder tablet press through the pipeline.
In this embodiment, when grinder starts, at first open motor 8, motor 8 work will take grinding shaft 3 to rotate, grinding shaft 3 will take a plurality of grinding vanes 4 of its circumference outer wall equipartition to grind the initial raw materials in grinding barrel 1 after rotating to realize that multiple initial raw materials grind the mesh that obtains compound raw materials.
Furthermore, when the grinding operation is carried out, nitrogen is injected into the grinding barrel 1 at intervals by utilizing the gas transmission pipeline 5, so that the grinding environment is in a low-temperature state, the condition that the performance of the material is unstable due to high temperature generated in the grinding process can be reduced, and the efficiency of grinding the material into powder in the grinding process can be improved; after grinding is finished, the gas transmission pipeline 5 is closed, the pipeline is opened, and nitrogen in the pipeline is diffused, so that the accident caused by directly opening the cover body 2 is reduced; and finally, opening the discharge hole 7 to enable the composite powder to flow out of the grinding barrel 1 and smelting the composite powder.
In one embodiment, the pressing apparatus includes: a U-shaped supporting seat 41 is arranged above the base 9, an opening of the U-shaped supporting seat 41 faces upwards, a cushion block 27 which is detachable through a bolt 11 is arranged at the bottom of a U-shaped groove of the supporting seat 41, and the U-shaped groove of the U-shaped structure is a sliding groove 26 and a sliding rod 25 which moves back and forth is arranged in the sliding groove 26; a cover plate 30 is arranged above the supporting seat 41, one surface, far away from the supporting seat 41, of the cover plate 30 is connected with a driving assembly through a sliding plate, the driving end of the driving assembly is used for pushing a pushing assembly, and the pushing assembly is used for pushing a pushing block 32 to perform alloy forming in a forming assembly;
the push assembly includes: the top plate 15, one side of the top plate 15 is connected with a rotating rod 16 with an L structure, the center of the rotating rod 16 is hinged in the notch of a U-shaped frame 28 through a first hinge shaft 17, one side of the U-shaped frame 28, which is far away from the push block 32, is provided with an extension bottom plate 42, and the upper surface of the extension bottom plate 42 is used for connecting first assembling holes 10 which are arranged at intervals on the sliding rod 25 through bolts 11; a second ejecting block 43 extending upwards is arranged in a U-shaped groove on one side, close to the pushing block 32, of the U-shaped frame 28, the second ejecting block 43 is used for contacting one side, close to the first hinge shaft 17, of the rotating rod 16, one end, far away from the top plate 15, of the rotating rod 16 is provided with a second assembling hole 18 with a strip-shaped notch structure, the second assembling hole 18 is rotatably arranged on the circumferential outer wall of a second hinge shaft 19, two ends of the second hinge shaft 19 are fixed on a third movable groove 31 of the connecting block 20, the third movable groove 31 is arranged towards one side of the pushing block 32, and the other end of the connecting block 20 is connected with a pushing rod 23 of the driving assembly; the drive assembly includes: the connecting block comprises a shell 22 and a push rod 23, wherein a movable cavity is arranged inside the shell 22, and one end, far away from the connecting block 20, of the push rod 23 reciprocates in the movable cavity; a first conversion head 21 is arranged at one end of the shell 22 close to the connecting block 20, a second conversion head 24 is arranged at the other end of the shell 22, and the first conversion head 21 and the second conversion head 24 are respectively connected with a pump; one ends of the first conversion head 21 and the second conversion head 24, which are far away from the pump, are communicated with a movable cavity of the shell 22 and are used for driving a piston of the push rod 23, which is positioned in the movable cavity; the lower part of the shell 22 is fixed on the upper surface of the cover plate 30 through a sliding plate, and the forming assembly is positioned on one side of the base 9 close to the push block 32.
The molding assembly includes: extrusion platform 40, base 9 is close to one side of ejector pad 32 is provided with extrusion platform 40, extrusion platform 40's bilateral symmetry is provided with shaping baffle 34, shaping baffle 34 with extrusion platform 40 forms shaping groove 33, the top of shaping groove 33 is provided with crucible pipeline 35, crucible pipeline 35 is used for injecting the fuse-element into in the shaping groove 33, one side that shaping groove 33 is close to base 9 is used for ejector pad 32 reciprocating motion, the opposite side of shaping groove 33 is provided with and is used for sealing side open-ended striker plate 39, striker plate 39's top is connected with telescopic link 38, telescopic link 38 connects telescopic motor 37's drive end, telescopic motor 37 passes through horizontal pole 36 to be fixed crucible pipeline 35's circumference lateral wall.
In this embodiment, when the extrusion apparatus is in operation, the second conversion head 24 is pressurized by the pump, so that the piston drives the push rod 23 to move towards the connecting block 20; the movement of the connecting block 20 drives the rotating rod 16 to rotate through the second hinge shaft 19, so that the top plate 15 connected with the other end of the rotating rod 16 is turned; so that the ejection face of the top plate 15 is vertical in the view shown in fig. 3; then, the sliding rod 25 is held by hand, the sliding rod 25 is pushed towards the right direction shown in fig. 3, and as the housing 22 of the push rod 23 is slidably arranged on the cover plate 30, when the sliding rod 25 moves, the sliding rod 25 drives the driving assembly and the push block 32 to move together, so as to achieve the purpose of pushing the formed profile; the slide bar 25 can also be pushed by a machine, thereby achieving the purpose of saving labor.
When the pushing block 32 does not need to be pushed, the pressure input of the second conversion head 24 is closed, and the pressure input of the first conversion head 21 is opened, so that the pushing rod 23 pulls the connecting block 20 to move towards the left direction shown in fig. 3, and further the rotating rod 16 moves leftwards through the movement of the second hinge shaft 19 and the connecting block 20, so that the rotating rod 16 swings, the abutting surface of the top plate 15 connected with the rotating rod 16 is separated from the abutting surface of the pushing block 32, and the pushing stop purpose is realized;
the second top block 43 and the extension bottom plate 42 directly form an L-shaped structure, the opening part of the L-shaped structure is a first movable groove, and the first movable groove is used for mutually matching one side of the L-shaped structure of the rotating rod 16, which is far away from the opening; the aim of smoothly swinging the rotating rod 16 is fulfilled;
further, the slide bar 25 is provided with a first top block at one end of the extension bottom plate 42, the first top block is used for forming a first movable groove in cooperation with a second top block, and the rotation of the rotating rod 16 is further limited, so that when the rotating rod 16 is driven to rotate, the top plate only needs to be lifted or the top plate 15 only needs to be dropped, and the condition that the rotation angle is too large is avoided.
The crucible pipeline 35 is used for guiding the melt from the crucible to the forming groove 33, the crucible pipeline 35 can partially dissipate heat and cool the melt in the flow guiding process, and the temperature of the melt is just suitable for the forming temperature of the forming after the melt reaches the forming groove 33; in addition, in order to realize better smelting, in the smelting process in the embodiment, the smelting is carried out in a high-purity argon environment of 0.2atm, and the alloy is isolated from the outside air in the smelting process. The argon level was 99.9%.
The fuse-element that crucible pipeline 35 flowed out pours into shaping groove 33 and the shaping back into, starts flexible motor 37, realizes the flexible of telescopic link 38, further makes striker plate 39 move up to open the ejection of compact portion of extrusion platform 40, and do benefit to and work as drive assembly with what push assembly can carry out one and adjust a promotion drives push assembly, thereby realizes utilizing push assembly to carry out the purpose that promotes with the shaping fuse-element in the shaping subassembly, has realized the purpose of full automatization preparation alloy. The situation of raw material waste in the manual preparation process is reduced.
The cushion block 27 can be a damping cushion block, which is beneficial to preventing the sliding rod 25 from easily moving when not being pushed or pulled in the sliding groove 26, and improving the stability of the push block 32; an inclined trapezoidal surface 29 is arranged in the sliding groove 26, and inclined trapezoidal surfaces 29 matched with the sliding groove 26 are correspondingly arranged on two sides of the sliding rod 25; it is possible to facilitate that the slide bar 25 does not get out of the slide groove 26 up and down.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for high-entropy alloy additive manufacturing is characterized by comprising the following steps:
selecting initial raw materials; wherein, the raw materials are powder;
injecting the initial powder into a grinding tank, and grinding the initial powder by using a ball milling device;
injecting gas into the grinding tank, and continuously grinding the initial powder by using a grinding device to obtain composite powder;
and preparing the alloy profile by using the composite powder.
2. A method of high entropy alloy additive manufacturing according to claim 1, wherein the starting materials comprise: al powder, Co powder, Cr particles, Fe blocks, Cu powder and Ni powder.
3. The method for high-entropy alloy additive manufacturing of claim 1, wherein the preparing and forming an alloy shape using the composite powder further comprises:
and carrying out cold pressing, smelting and heat preservation on the composite powder, and then carrying out extrusion forming by using extrusion equipment to obtain the alloy section.
4. The method for high-entropy alloy additive manufacturing of claim 1, wherein the preparing and forming an alloy shape using the composite powder further comprises:
1) pressing the composite powder into an alloy block by using a powder tablet press;
2) placing the alloy block into a smelting furnace for smelting; wherein the melting point is 350-680 ℃, and the boiling point is 2485-2618 ℃;
3) pouring the melt obtained by smelting into a crucible for cooling;
4) repeating steps 2) -3) five times, after which the melt obtained is poured into a mould for extrusion and shaped.
5. A method for high-entropy alloy additive manufacturing according to any one of claims 1 to 4, further comprising an apparatus including a grinding device and a pressing device, wherein the grinding device includes a grinding barrel and a grinding mechanism, and the grinding barrel is used for containing the initial powder and grinding the initial powder through the grinding mechanism;
the extrusion equipment is used for extruding and forming the melt obtained by smelting into a section.
6. A high-entropy alloy additive manufacturing method according to claim 5, wherein a cover body is arranged on the grinding barrel, and a pressure pipeline is arranged on the cover body and used for pressurizing or depressurizing the grinding barrel; the grinding barrel is provided with a gas transmission pipeline, and the gas transmission pipeline is used for injecting nitrogen into the grinding barrel;
the cover body is used for opening or closing the opening part of the grinding barrel.
7. The method for high-entropy alloy additive manufacturing according to claim 6, wherein a grinding shaft is arranged in the grinding barrel, one end of the grinding shaft penetrates through the bottom of the grinding barrel, and is connected with a motor;
the bottom of grinding barrel still the interval is provided with a plurality of landing legs, one of them side of grinding barrel is provided with the discharge gate, the discharge gate is close to the bottom surface in the grinding barrel, the discharge gate is used for communicating the powder tablet press through the pipeline.
8. A method of high entropy alloy additive manufacturing according to claim 5, wherein the extrusion apparatus comprises: a base, a supporting seat with a U-shaped structure is arranged above the base, the U-shaped structure of the supporting seat is provided with an opening facing upwards, a cushion block which can be disassembled through a bolt is arranged at the bottom of the U-shaped structure groove of the supporting seat,
the U-shaped groove of the U-shaped structure is a sliding groove, and a sliding rod which moves back and forth is arranged in the sliding groove;
a cover plate is arranged above the supporting seat, one surface, far away from the supporting seat, of the cover plate is connected with a driving assembly through a sliding plate, the driving end of the driving assembly is used for pushing a pushing assembly, and the pushing assembly is used for pushing a pushing block to perform alloy forming in a forming assembly;
the push assembly includes: the push block comprises a push rod, a top plate, a first hinge shaft, an extension bottom plate and a second assembly hole, wherein one surface of the top plate is connected with the rotary rod with an L structure, the center of the rotary rod is hinged in a notch of a U-shaped frame through the first hinge shaft, one side of the U-shaped frame, which is far away from the push block, is provided with the extension bottom plate, and the upper surface of the extension bottom plate is used for being connected with the first assembly holes arranged at intervals on the slide rod through bolts;
a second ejecting block extending upwards is arranged in the U-shaped groove at one side of the U-shaped frame close to the pushing block, the second ejecting block is used for contacting one side of the rotating rod close to the first articulated shaft,
a second assembly hole with a strip-shaped notch structure is formed in one end, away from the top plate, of the rotating rod, the second assembly hole is rotatably formed in the circumferential outer wall of a second hinge shaft, two ends of the second hinge shaft are fixed to a third movable groove of the connecting block, the third movable groove is formed in a position facing one side of the push block, and the other end of the connecting block is connected with a push rod of the driving assembly;
the drive assembly includes: the connecting block comprises a shell and a push rod, wherein a movable cavity is arranged in the shell, and one end of the push rod, which is far away from the connecting block, reciprocates in the movable cavity;
a first conversion head is arranged at one end, close to the connecting block, of the shell, a second conversion head is arranged at the other end of the shell, and the first conversion head and the second conversion head are respectively connected with a pump;
one ends, far away from the pump, of the first conversion head and the second conversion head are communicated with a movable cavity of the shell and used for driving a piston of the push rod, which is positioned in the movable cavity;
the lower part of the shell is fixed on the upper surface of the cover plate through a sliding plate, and the forming assembly is positioned on one side, close to the push block, of the base.
9. A method of high entropy alloy additive manufacturing according to claim 8, wherein the forming assembly comprises: extrusion platform, the base is close to one side of ejector pad is provided with extrusion platform, extrusion platform's bilateral symmetry is provided with the shaping baffle, the shaping baffle with extrusion platform forms the shaping groove, the top in shaping groove is provided with the crucible pipeline, the crucible pipeline is used for injecting the fuse-element into in the shaping groove, one side that the shaping groove is close to the base is used for ejector pad reciprocating motion, the opposite side in shaping groove is provided with and is used for sealing side open-ended striker plate, the top of striker plate is connected with the telescopic link, the drive end of flexible motor is connected to the telescopic link, flexible motor passes through the horizontal pole to be fixed the circumference lateral wall of crucible pipeline.
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| CN202110542552.5A CN113215469A (en) | 2021-05-18 | 2021-05-18 | Method and device for manufacturing high-entropy alloy additive |
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| WO2018203601A1 (en) * | 2017-05-04 | 2018-11-08 | 포항공과대학교 산학협력단 | Method for improving processability of high-entropy alloy to which al is added |
| CN109261935A (en) * | 2018-10-19 | 2019-01-25 | 华南理工大学 | A kind of high-entropy alloy reinforced aluminum matrix composites and its extrusion casting method |
| CN112221617A (en) * | 2019-06-30 | 2021-01-15 | 西安众力沥青有限公司 | Grinding mechanism and grinding device |
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2021
- 2021-05-18 CN CN202110542552.5A patent/CN113215469A/en not_active Withdrawn
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| CN104039481A (en) * | 2011-11-11 | 2014-09-10 | 科卢斯博知识产权有限公司 | Ingot loading mechanism for injection molding machine |
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| WO2018203601A1 (en) * | 2017-05-04 | 2018-11-08 | 포항공과대학교 산학협력단 | Method for improving processability of high-entropy alloy to which al is added |
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