CN111531266A - Friction stir welding equipment and method for particle-reinforced gradient composite material - Google Patents

Friction stir welding equipment and method for particle-reinforced gradient composite material Download PDF

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Publication number
CN111531266A
CN111531266A CN202010376831.4A CN202010376831A CN111531266A CN 111531266 A CN111531266 A CN 111531266A CN 202010376831 A CN202010376831 A CN 202010376831A CN 111531266 A CN111531266 A CN 111531266A
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friction stir
stir welding
plate
gradient
particle
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CN111531266B (en
Inventor
赵运强
尤佳庆
苗澍
谭锦红
董春林
王春桂
易耀勇
邓军
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Guangdong Welding Institute (china-Ukraine EO Paton Institute Of Welding)
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Guangdong Welding Institute (china-Ukraine EO Paton Institute Of Welding)
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/26Auxiliary equipment

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  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The embodiment of the invention provides a friction stir welding device and method for a particle-reinforced gradient composite material, and relates to the technical field of friction stir welding. The apparatus includes a metal substrate plate and a friction stir welding device. The metal substrate plate is provided with a plurality of filling holes, the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal substrate plate are reduced in a gradient manner, the filling holes are used for filling a wet mixture of a reinforced granular material and a matrix material powder, and the matrix material powder and the metal substrate plate are made of the same material; the friction stir welding device includes a stir head for friction stir welding the metal base material plate, and a welding path of the stir head can completely cover the top surface. The equipment can be used for welding to obtain the composite material with the content of the reinforced material in gradient distribution, the content of the gradient component is controllable, the process is simple, the production efficiency is high, and the problems of poor binding capacity, easiness in cracking and the like of the composite material can be effectively solved.

Description

Friction stir welding equipment and method for particle-reinforced gradient composite material
Technical Field
The invention relates to the technical field of friction stir welding, in particular to friction stir welding equipment and a friction stir welding method for a particle reinforced gradient composite material.
Background
With the development of science and technology, particularly in the fields of aerospace, high-speed rail trains and the like, structural materials are required to have various excellent mechanical properties, such as high strength, high plasticity, high rigidity, low density and the like. The traditional single material is difficult to meet the requirements of multiple complex properties, for example, the aluminum alloy has the characteristics of small density, strong plastic deformation capability and the like, but the strength of the aluminum alloy is inferior to that of materials such as steel and the like. Based on this, the composite material prepared by the reinforcing phase and the metal matrix can solve the problem of single material performance to a certain extent, but the prepared and researched objects are the composite material with reinforcing particles uniformly distributed in the matrix, and the uniform material has certain limitations in actual production, such as poor binding capacity and the like. Therefore, the metal matrix gradient composite material is produced to meet the designability and controllability of high-end equipment on material performance.
In the current preparation method of the metal-based gradient composite material, methods such as powder metallurgy, centrifugal casting, spraying and the like are mainly used, wherein the powder metallurgy method comprises a direct filling method, a tape casting method, a centrifugal lamination method and the like. Although the preparation method has high preparation efficiency, the components of the gradient material prepared by the process are discontinuously changed in a step mode and do not have high controllability. The centrifugal casting method has high efficiency of producing gradient materials, but the preparation method has requirements on material shapes and is generally only suitable for cylindrical castings. The plasma spraying method can obtain a gradient material meeting the working requirement on the surface of the base material by adjusting the temperature and the flow rate of the plasma jet, but for the material with larger difference of elastic modulus and thermal expansion coefficient, the binding force between the base body and the coating is lower, and the coating is easy to fall off.
The present invention has been made based on this.
Disclosure of Invention
The invention aims to provide a friction stir welding device and a friction stir welding method for a particle-reinforced gradient composite material, which can weld the composite material with the content of the reinforced material in gradient distribution, have controllable content of gradient components, simple process and high production efficiency, and can effectively solve the problems of poor binding capacity, easy cracking and the like of the composite material.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a friction stir welding apparatus for particle-reinforced gradient composite materials, including:
the metal base plate is provided with a plurality of filling holes, the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal base plate are reduced in a gradient manner, the filling holes are used for filling a wet mixture of a reinforced granular material and base material powder, and the base material powder and the metal base plate are made of the same material;
a friction stir welding device includes a stir head for friction stir welding a metal substrate plate, and a welding path of the stir head is capable of completely covering a top surface.
In an alternative embodiment, a plurality of fill holes are spaced uniformly apart in the metal substrate sheet and can completely cover the top surface.
In an alternative embodiment, the particle-reinforced gradient composite material friction stir welding device further comprises a cover plate, the cover plate is made of the same material as the metal base material plate, the cover plate is pre-welded to the top surface of the metal base material plate, and the stirring head is used for performing friction stir welding on the metal base material plate after penetrating through the cover plate.
In an alternative embodiment, the pin is provided for friction stir welding, and the pin has a length greater than or equal to the sum of the total thicknesses of the fill hole and the cover plate.
In an alternative embodiment, the length of the stirring pin differs from the sum of the total thickness of the filling hole and the cover plate by 0-1 mm.
In alternative embodiments, the inner diameter of the fill hole decreases in a linear gradient or in an irregular gradient.
In an alternative embodiment, the filling opening is a conical opening, and the conical opening has a cone angle of 5 ° to 75 °.
In a second aspect, an embodiment of the present invention provides a friction stir welding method for a particle-reinforced gradient composite material, including:
a plurality of filling holes are formed in the metal base material plate, and the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal base material plate are reduced in a gradient manner;
filling a wet mixture of a reinforcing particle material and matrix material powder into the filling holes, wherein the matrix material powder and the metal matrix plate are made of the same material;
and performing friction stir welding, wherein the stirring head performs friction stir welding on the metal base material plate, and the welding path of the stirring head can completely cover the top surface.
In an alternative embodiment, the method further comprises, before performing the friction stir welding operation:
and prewelding a cover plate on the top surface, wherein the cover plate is made of the same material as the metal base material plate, so that the stirring head is used for stirring and friction welding the metal base material plate after penetrating through the cover plate.
In an alternative embodiment, the method further comprises, after the friction stir welding operation:
and (4) milling the top surface of the metal base material plate by using a milling cutter, and completely removing the pre-welded cover plate.
Embodiments of the invention have at least the following advantages or benefits:
embodiments of the present invention provide a particle-reinforced gradient composite friction stir welding apparatus and method that includes a metal substrate plate and a friction stir welding device. The metal substrate plate is provided with a plurality of filling holes, the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal substrate plate are reduced in a gradient manner, the filling holes are used for filling a wet mixture of a reinforced granular material and a matrix material powder, and the matrix material powder and the metal substrate plate are made of the same material; the friction stir welding device includes a stir head for friction stir welding the metal base material plate, and a welding path of the stir head can completely cover the top surface. The equipment can be used for welding to obtain the composite material with the content of the reinforced material in gradient distribution, the content of the gradient component is controllable, the process is simple, the production efficiency is high, and the problems of poor binding capacity, easiness in cracking and the like of the composite material can be effectively solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a friction stir welding apparatus for a particle-reinforced gradient composite material according to an embodiment of the present invention;
FIG. 2 is a schematic process flow diagram of a friction stir welding apparatus for particle reinforced gradient composites according to an embodiment of the present invention;
FIG. 3 is a schematic partial cross-sectional view of a friction stir welding apparatus for particle-reinforced gradient composite materials according to an embodiment of the present invention.
Icon: 100-particle reinforced gradient composite material friction stir welding equipment; 101-a metal substrate sheet; 103-filling the hole; 105-a stir head; 107-stirring pin; 109-top surface; 111-a bottom surface; 113-side; 115-wet mixture; 117-cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a friction stir welding apparatus 100 for particle-reinforced gradient composite material provided in this embodiment. Referring to fig. 1, the embodiment provides a friction stir welding apparatus 100 for friction stir welding of a metal substrate with a particle-reinforced gradient composite material, so as to enhance the strength of the metal substrate and meet the production requirement.
In detail, referring to fig. 1, the apparatus 100 for friction stir welding of a particle-reinforced gradient composite material includes a metal substrate plate 101 and a friction stir welding device.
Specifically, the metal base plate 101 has a substantially rectangular solid plate-like structure including a top surface 109 and a bottom surface 111 disposed at an interval, and four side surfaces 113 enclosed between the top surface 109 and the bottom surface 111. In order to improve the strength of the metal substrate plate 101, it is usually necessary to prepare a composite material from a reinforcing phase and a metal matrix, but in the prior art, a composite material with uniformly distributed reinforcing particles is often adopted, so that the circumferential edge components of the composite material contacting the metal substrate have large differences, and thus the conditions of poor bonding force, easy cracking and the like easily exist.
Therefore, in this embodiment, the metal base plate 101 is provided with a plurality of filling holes 103, and the inner diameters of the filling holes 103 in the direction from the top surface 109 to the bottom surface 111 of the metal base plate 101 are gradually decreased. The filling holes 103 are used for filling the wet mixture 115 of the reinforcing particulate material and the matrix material powder, and the matrix material powder and the metal matrix plate 101 are the same material. The friction stir welding device specifically includes a stir head 105, and fig. 2 is a schematic diagram of a welding process route of the friction stir welding equipment 100 for particle-reinforced gradient composite material provided in this embodiment; fig. 3 is a schematic partial cross-sectional view of a friction stir welding apparatus 100 for particle-reinforced gradient composite material according to an embodiment. Referring to fig. 2 and 3, the direction of the arrow is the moving direction of the stirring head 105, i.e., the welding direction, the stirring head 105 is used for friction stir welding of the metal substrate plate 101, and the welding path of the stirring head 105 can completely cover the top surface 109. On the one hand, the filling hole 103 is set to have a gradient inner diameter, and can be welded to obtain the composite material with the content of the reinforcing material in gradient distribution, so that the components of the circumferential edge in contact with the metal base material plate 101 are gradually changed, the component difference between the circumferential edge and the circumferential edge of the metal base material plate 101 is gradually reduced, the bonding force of the contact surfaces of the two is stronger, and the problems of poor bonding capability, easy cracking and the like of the composite material are effectively solved. On the other hand, the inner diameter of the filling hole 103 is reduced in a gradient manner, so that the content of gradient components is controllable, compared with the prior art, the process is simpler, the production efficiency is higher, and the quality of a finished product can be effectively ensured.
It should be noted that, in this embodiment, the friction stir welding apparatus naturally further includes a driving mechanism for driving the stirring head 105 to rotate and stir, and other mechanisms essential for the friction stir welding apparatus, and since the present invention does not improve this portion, the present embodiment is not described herein again.
It should be further noted that, in the embodiment of the present invention, the metal substrate plate 101 may be specifically selected as an aluminum plate or an aluminum alloy plate, the particulate reinforcing material may be specifically selected as a reinforcing particulate material such as zirconia, and the particle size of the reinforcing particulate material is 200-500 meshes, in other embodiments, the type of the material and the number of the particles may also be selected according to the requirement, and the embodiment is not limited.
Referring to fig. 1 again, in the present embodiment, in order to further ensure the strength and the bonding force of the composite material after friction stir welding, the plurality of filling holes 103 are uniformly spaced apart from each other and completely cover the top surface 109, so that when the stir welding operation is performed by the stir head 105, the friction stir welding operation may be performed on the surface of the metal substrate 101 in sequence, so that the reinforcing particles are uniformly distributed in the horizontal direction and are distributed in a gradient manner in the vertical direction, thereby ensuring that the components of the circumferential edge of the metal substrate 101 that is in contact with the metal substrate are gradually changed, and the component difference between the circumferential edge of the metal substrate 101 and the circumferential edge of the metal substrate is gradually reduced, so that the bonding force between the two contact surfaces is stronger, thereby effectively improving the problems of poor bonding force and easy cracking of the composite material.
Referring to fig. 2 and fig. 3 again, in the present embodiment, in order to ensure the welding effect, the apparatus 100 for friction stir welding of a particle-reinforced gradient composite material further includes a cover plate 117, the material of the cover plate 117 is the same as that of the metal base material plate 101, the cover plate 117 is pre-welded to the top surface 109 of the metal base material plate 101, and the stirring head 105 is configured to perform friction stir welding on the metal base material plate 101 after penetrating through the cover plate 117. And after welding, the upper surface of the material can be milled by a milling cutter, and the pre-welded cover plate 117 is completely removed, so that the welding quality and effect are ensured. Through the setting of prewelding apron 117, can prevent effectively that the reinforcing phase granule from running off in the course of working, guarantee the accuracy of gradient combined material design to guarantee welding effect and quality.
Referring to fig. 1 to 3 again, in the present embodiment, in order to further ensure the quality of the friction stir welding, the length of the pin 107 at the end of the pin 105 for friction stir welding needs to be adjusted and controlled according to the requirement, wherein the length of the pin 107 is greater than or equal to the sum of the total thicknesses of the filling hole 103 and the cover plate 117. Preferably, the length of the stirring pin 107 is different from the sum of the total thicknesses of the filling hole 103 and the cover plate 117 by 0-1mm, so that the composition of the peripheral edge of the reinforced particle material in contact with the metal base material plate 101 is gradually changed, the composition difference of the peripheral edge of the reinforced particle material in contact with the metal base material plate 101 is gradually reduced, the bonding force of the contact surfaces of the reinforced particle material and the metal base material plate is stronger, and the problems of poor bonding capability, easy cracking and the like of the composite material are effectively improved. Of course, in other embodiments, the length of the stirring pin 107 may also be adjusted according to requirements, and this embodiment is not limited.
Referring again to fig. 1-3, in the present embodiment, the filling hole 103 is a conical hole, and the conical angle of the conical hole is 5 ° -75 °. The conical hole structures are uniformly distributed in the metal base material plate 101, and the distribution characteristics of the enhanced particles can be adjusted by changing the conical angle. Meanwhile, the proportion of the components of the reinforced particles can be adjusted by changing the diameter of the cone; the thickness of the reinforced particles can be adjusted by changing the depth of the cone, so that gradient transition of the composite material is realized. Of course, in other embodiments, the conical angle may also be adjusted according to requirements, and meanwhile, the inner diameter of the filling hole 103 may also be in other linear gradient decreasing structures, for example, may be set to be spherical or segmental, and may even be set to be in irregular gradient decreasing, and the like, which is not limited in this embodiment.
The embodiment also provides a friction stir welding method for the particle reinforced gradient composite material, which specifically comprises the following steps:
step S1: a plurality of filling holes 103 are formed in the metal base plate 101, and the inner diameters of the filling holes 103 in the direction from the top surface 109 to the bottom surface 111 of the metal base plate 101 are reduced in a gradient manner;
in detail, the filling hole 103 is specifically selected to be a conical hole, the conical angle degree of the conical hole is 5-75 degrees, and the size, the shape and the depth of the conical hole can be changed according to the material design requirement.
Step S2: filling the filling hole 103 with a wet mixture 115 of a reinforcing particulate material and a matrix material powder, the matrix material powder and the metal substrate plate 101 being the same material;
in detail, step S2 specifically includes:
step S21: mechanically mixing powder of the same material of the reinforced particle material and the metal base material by using a ball mill;
step S22: making the mixture into a wet mixture by using an organic solvent;
step S23: the wet mixture 115 is filled into the filling hole 103.
Step S3: pre-welding a cover plate 117 on the top surface 109;
in detail, the cover plate 117 is made of the same material as the metal base material plate 101, and the thickness of the cover plate 117 is 0.5 to 1mm, so that the stirring head 105 is used to stir-friction weld the metal base material plate 101 after passing through the cover plate 117.
Step S4: performing friction stir welding such that the metal base plate 101 is friction stir welded by the stir head 105 and the welding path of the stir head 105 completely covers the top surface 109;
in detail, the base material and the cover plate 117 are sequentially subjected to friction stir processing by using the stirring head 105 for conventional friction stir welding until the stirring head 105 completely covers the surface of the base material by passing through a path, so that the base material and the reinforcing particles are fully mixed, and the length of the stirring pin 107 is 0-1mm greater than the sum of the hole depth and the thickness of the cover plate 117.
Step S5: the top surface 109 of the metal substrate plate 101 is milled using a milling cutter to remove all of the pre-welded cover plate 117.
The following is a detailed description of the installation, operation and process of the apparatus 100 and method for friction stir welding of particle reinforced gradient composite materials according to the embodiments of the present invention:
when the particle reinforced gradient composite material friction stir welding equipment 100 is installed, a plurality of filling holes 103 which are uniformly distributed at intervals are formed in a metal base material plate 101, the filling holes 103 are all conical holes, and the conical angles are all between 5 and 75 degrees; then, mixing and ball-milling the reinforced particle material and the matrix material powder by adopting an inorganic solvent to form a wet mixture 115; then, filling the prepared wet mixture 115 of the reinforcing particle material and the matrix material powder into the filling hole 103; next, the cover plate 117 may be tack-welded to the top surface 109 of the metal base plate 101.
When the particle reinforced gradient composite material friction stir welding equipment 100 works, the metal base material plate 101 and the cover plate 117 are sequentially subjected to friction stir processing by adopting the stirring head 105 for conventional friction stir welding until the stirring head 105 completely covers the surface of the base material by walking a path, so that the base material and the reinforced particles are fully mixed. After the welding is completed, the upper surface of the material is milled by a milling cutter, and the pre-welded cover plate 117 is removed completely.
In the process, the filling hole 103 is set to have the inner diameter reduced in a gradient manner, the composite material with the content of the reinforcing material distributed in the gradient manner can be obtained through welding, so that the components of the circumferential edge in contact with the metal base material plate 101 are gradually changed, the component difference between the circumferential edge and the circumferential edge of the metal base material plate 101 is gradually reduced, the bonding force of the contact surfaces of the two is stronger, and the problems that the composite material is poor in bonding capability and easy to crack are effectively solved. On the other hand, the inner diameter of the filling hole 103 is reduced in a gradient manner, so that the content of gradient components is controllable, the process is simpler, the production efficiency is higher, and the quality of a finished product can be effectively ensured.
In summary, the friction stir welding apparatus 100 and the method for particle-reinforced gradient composite materials provided by the embodiments of the present invention can weld composite materials with a gradient distribution of the content of the reinforced material, and the apparatus has the advantages of controllable content of the gradient component, simple process, high production efficiency, and can effectively improve the problems of poor binding ability, easy cracking, and the like of the composite materials.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A particle reinforced gradient composite friction stir welding apparatus, comprising:
the metal base plate is provided with a plurality of filling holes, the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal base plate are reduced in a gradient manner, the filling holes are used for filling a wet mixture of a reinforced granular material and a base material powder, and the base material powder and the metal base plate are the same material;
friction stir welding device, including the stirring head, the stirring head is used for right the metal substrate board carries out friction stir welding, just the welding route of stirring head can cover completely the top surface.
2. The particle reinforced gradient composite friction stir welding apparatus of claim 1, wherein:
the plurality of filling holes are uniformly spaced apart from the metal base plate and can completely cover the top surface.
3. The particle reinforced gradient composite friction stir welding apparatus of claim 1, wherein:
particle reinforcing gradient combined material friction stir welding equipment still includes the apron, the apron with the material of metal substrate board is the same, just the apron preweld in the top surface of metal substrate board, the stirring head is used for passing behind the apron right the metal substrate board carries out friction stir welding.
4. The particle reinforced gradient composite friction stir welding apparatus of claim 3, wherein:
the stirring head is provided with a stirring pin, the stirring pin is used for stirring friction welding, and the length of the stirring pin is larger than or equal to the sum of the total thicknesses of the filling hole and the cover plate.
5. The particle reinforced gradient composite friction stir welding apparatus of claim 4, wherein:
the difference between the length of the stirring pin and the sum of the total thicknesses of the filling hole and the cover plate is 0-1 mm.
6. The particle reinforced gradient composite friction stir welding apparatus of any one of claims 1 to 5, wherein:
the inner diameter of the filling hole is reduced in a linear gradient or in an irregular gradient.
7. The particle reinforced gradient composite friction stir welding apparatus of claim 6, wherein:
the filling hole is a conical hole, and the conical angle degree of the conical hole is 5-75 degrees.
8. A friction stir welding method of a particle-reinforced gradient composite material is characterized by comprising the following steps:
the method comprises the following steps that a plurality of filling holes are formed in a metal base material plate, and the inner diameters of the filling holes in the direction from the top surface to the bottom surface of the metal base material plate are reduced in a gradient manner;
filling a wet mixture of a reinforcing particle material and a matrix material powder into the filling holes, wherein the matrix material powder and the metal matrix plate are made of the same material;
and carrying out friction stir welding, so that the stirring head carries out friction stir welding on the metal base material plate, and the welding path of the stirring head can completely cover the top surface.
9. The particle reinforced gradient composite friction stir welding process of claim 8, further comprising, prior to performing the friction stir welding operation:
and prewelding a cover plate on the top surface, wherein the cover plate is made of the same material as the metal base material plate, so that the stirring head is used for stirring and friction welding the metal base material plate after penetrating through the cover plate.
10. The particle reinforced gradient composite friction stir welding method of claim 9, further comprising, after the friction stir welding operation:
and milling the top surface of the metal base material plate by using a milling cutter, and completely removing the pre-welded cover plate.
CN202010376831.4A 2020-05-07 2020-05-07 Friction stir welding equipment and method for particle-reinforced gradient composite material Active CN111531266B (en)

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Cited By (2)

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CN112935516A (en) * 2021-01-22 2021-06-11 广东省科学院中乌焊接研究所 High-throughput preparation equipment and method for particle reinforced composite material
CN114507803A (en) * 2022-01-14 2022-05-17 西安建筑科技大学 Quenching distribution steel with gradient distribution of stacking fault energy, preparation method and application

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