Composite material cone structure based on diffusion welding and preparation method thereof

Abstract

The invention discloses a composite material cone structure based on diffusion welding and a preparation method thereof. The preparation method comprises the following steps: (1) respectively processing components of the composite material cone structure; (2) assembling the component parts from top to bottom in sequence to form a cylinder assembly part; (3) the cylinder assembly part is inversely arranged in a fixing table with an inverted cone structure machining groove; and (4) a profiling punch which is the same as the composite material cone in structure is adopted, and the cylinder assembly part is punched downwards for diffusion welding. According to the manufacturing method, the composite material cone structure is divided into the multiple assemblies, then the electron beam welding and diffusion welding combined technology is used for achieving fusion of materials between the assemblies, and therefore the integrally-formed structure is formed, and the consistency of the mechanical properties of the composite material in all directions can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material cone structure preparation, in particular to a composite material cone structure based on diffusion welding and a preparation method thereof. Background Art

[0002] As a key component of the inductively coupled plasma ion source and mass spectrometer, the long-life high-temperature plasma mass spectrometry interface cone is a key unit for extracting ions generated in the plasma into the vacuum system, and undertakes the key transmission function of ions from atmospheric pressure to vacuum pressure. It plays an important role in high-temperature (4000-10000K) plasma extraction, ion transmission and focusing, vacuum differential, etc. The purity, defects, overall thermal conductivity, acid resistance, and dimensional accuracy and surface quality of the tip and orifice of the interface cone material directly affect the instrument's sensitivity, noise, life, acid and alkali resistance and other performance indicators. At present, the interface cones used in the ICPMS instruments introduced into China and the domestic ICPMS are all imported.

[0003] Metal interface cones made of a single material often cannot meet the use requirements. For example, pure nickel is often used as the base material of the interface cone. Nickel has good high temperature resistance, but its thermal conductivity is poor. The harsh high temperature working environment of the interface cone will make it impossible to extract the heat accumulated at the tip of the interface cone, causing the cone hole to expand / enlarge / fail quickly, greatly reducing the life of the interface cone, and unable to guarantee the vacuum ring interface between the ion source and the mass analyzer, affecting the normal use of the instrument. In addition, the interface cone of the same material will cause the nickel material to volatilize due to the high cone temperature, and the nickel background signal detected by the instrument is too high, affecting the measurement sensitivity. Pure copper has excellent thermal conductivity, but its high temperature resistance is poor. It is easy to oxidize and corrode when exposed to air, and has high requirements for storage conditions.

[0004] Therefore, pure nickel is suitable as the tip high temperature resistant material of the interface cone, but not as the thermal conductive material, and pure copper is suitable as the thermal conductive material of the interface cone, but not as the tip high temperature resistant material. Therefore, the nickel-copper composite metal structure can combine the excellent properties of the two metal materials and be used in extremely harsh environments. How to achieve the preparation of the composite cone structure has become a problem that needs to be solved.

[0005] Patent CN202311873448 discloses a precision interface cone component and its preparation method and application, which uses additive technology to realize the preparation of composite material vertebral structure. Additive manufacturing technology includes laser powder feeding or wire feeding deposition technology and / or electron beam wire feeding deposition technology. Additive manufacturing technology is a rapid manufacturing technology that builds three-dimensional objects by adding layers of materials. Directionality refers to the difference in mechanical properties and properties of each part of the printed object in different directions. In the process of additive manufacturing technology, factors such as the grain structure / interlayer bonding of the printed material will cause the material properties to differ in different directions. Additive manufacturing technology has better performance of structural materials in the upward stacking direction.

[0006] However, the crystal phase and organization / mechanical properties in the direction perpendicular to the stacking direction are poor, which affects the life and use of the interface cone. In addition, additive manufacturing technology is prone to unmelted powder particles inside the material, and there are pores inside, which will volatilize gas in a vacuum environment, affecting the performance of the instrument. Therefore, it is obvious that the composite interface cone prepared by additive manufacturing technology is difficult to meet the use requirements.

[0007] In view of this, this application is hereby filed. Summary of the invention

[0008] The technical problem to be solved by the present invention is that the composite material interface cone prepared by additive manufacturing technology has poor crystal phase and organization / mechanical properties in the direction perpendicular to the stacking direction, which affects the life and use of the interface cone. Unmelted powder particles are easily present inside the material, and there are pores inside, which causes the interface cone to volatilize gas in a vacuum environment. The purpose is to provide a composite material cone structure based on diffusion welding and a preparation method thereof. The composite material cone structure is split into multiple components, and then electron beam welding combined with diffusion welding technology is used to achieve the fusion of materials between the components, thereby forming an overall molding structure, which can ensure the consistency of the mechanical properties of the composite material in all directions.

[0009] The present invention is achieved through the following technical solutions:

[0010] In a first aspect, the present invention provides a method for preparing a composite material pyramid structure based on diffusion welding, comprising the following steps:

[0011] (1) Processing the components of the composite cone structure separately;

[0012] (2) Assembling the component parts from top to bottom in sequence to form a column assembly;

[0013] (3) Invert the column assembly into a fixed table with a groove machined into an inverted cone structure;

[0014] (4) Using a contoured punch with the same structure as the composite cone, the column assembly is punched downward for diffusion welding.

[0015] The present invention splits the composite material cone structure into multiple components and then uses electron beam welding combined with diffusion welding technology to achieve fusion of materials between the components to form an integral molding structure, which can ensure the consistency of mechanical properties of the composite material in all directions.

[0016] The composite cone structure involved in the present invention takes the interface cone as an example. Since pure nickel materials and the like are suitable as the high-temperature resistant materials at the tip of the interface cone, and pure copper materials are suitable as the cone-base thermal conductive materials of the interface cone, using different materials at different parts of the interface cone can greatly improve the performance of the interface cone. However, how to better combine the two materials at the two parts has become a difficult problem in the process. Generally, the relatively mature additive manufacturing technology can realize the preparation of composite structural components of various materials, but in the direction perpendicular to the additive stacking direction, the crystal phase and organization / mechanical properties of the material are poor, unmelted powder particles are prone to appear inside, and there are pores inside, so the interface cone cannot be used in a vacuum high-temperature environment.

[0017] Therefore, the present invention creatively decomposes the materials required for the composite material cone structure into multiple plate-like components, and then fuses the components through diffusion welding to form an overall structure during the stamping process. This ensures that the mechanical properties of the material are consistent in all directions and avoids the situation where the mechanical properties are poor in a certain direction. At the same time, during the stamping diffusion welding process, no powder particles will exist. Even if there are pores inside the components, the pore gas can be fully discharged during the diffusion welding fusion process to ensure the density inside the composite material.

[0018] In a specific embodiment, the component parts include a cone tip sheet, a cone base upper plate, a cone base inner core plate and a cone base lower plate which are assembled in sequence from top to bottom;

[0019] The cone-base inner core plate is an annular plate with a through hole in the center;

[0020] The upper surface of the cone base lower plate has an annular groove matching the diameter of the cone base inner core plate;

[0021] The lower surface of the cone-base upper plate is closely fitted with the upper surface of the cone-base inner core plate, and after assembly, the center and outer edge of the lower surface can be closely fitted with the center and outer edge of the upper surface of the cone-base lower plate;

[0022] The upper surface of the cone base upper plate is provided with a circular groove matching the shape of the cone tip sheet.

[0023] The present invention divides the composite material cone structure into four component parts, the cone tip sheet serves as the cone tip part, the cone base upper plate and the cone base lower plate serve as the external cladding structure of the cone base part, and the cone base inner core plate serves as the internal core material of the cone base part. The four component parts are assembled in the above-designed specific structure and then stamped from the center into the shape of the cone structure. During the stamping process, the component parts deform, diffuse and fuse with each other to form an integral integrated structure.

[0024] In a specific embodiment, the thickness of the cone-base inner core plate gradually decreases toward the inner diameter of the ring to form a cone-shaped structure.

[0025] The cone-base inner core plate of the present invention is designed to be thick on the outside and thin on the inside. This is because after the constituent parts are assembled into a columnar structure, they are punched into a conical structure from the center. Therefore, the middle parts of the cone-base upper plate and the cone-base lower plate are subjected to the greatest degree of force diffusion and deformation. Therefore, the cone-base inner core plate is designed to be thinner near the center, which can avoid the inner core of the cone-base inner core plate being exposed during the stamping process, thereby ensuring that the outer layer covers the inner core well.

[0026] In a specific embodiment, before diffusion welding, the annular contact surface where the outer edge of the lower surface of the cone base upper plate and the outer edge of the upper surface of the cone base lower plate are welded by electron beam welding or laser welding.

[0027] The diffusion welding process adopted by the present invention realizes the fusion of materials, and in the diffusion welding process, the materials are subjected to extrusion pressure from top and bottom. Therefore, before performing stamping diffusion welding, the present invention first performs annular welding between the edges of the cone base upper plate and the cone base lower plate, thereby ensuring that no extrusion deformation occurs at this position during diffusion welding, thereby avoiding the formation of unwelded cracks.

[0028] In a specific embodiment, the thickness of the outer edge of the cone-base inner core plate is less than the thickness of the outer edge of the annular groove, that is, the cone-base inner core plate is completely embedded between the cone-base lower plates, so that the fitting surfaces of the cone-base upper plate and the edge of the cone-base inner core plate and the fitting surfaces of the cone-base upper plate and the edge of the cone-base lower plate can be staggered and not on the same plane, thereby ensuring sufficient diffusion welding at the joints between the edges of the three components, and at the same time avoiding damage caused by the cone-base inner core plate diffusing to the annular welding of the edges of the cone-base upper plate and the cone-base lower plate.

[0029] In a specific embodiment, the distance between the surface where the center of the lower surface of the cone base upper plate fits with the center of the upper surface of the cone base lower plate and the bottom surface of the cone tip sheet is 0.6-0.8 mm.

[0030] The present invention designs the spacing thickness between the diffusion bonding surface in the middle of the cone base upper plate and the cone base lower plate and the bonding surface between the cone tip sheet and the cone base upper plate to be very thin, so as to ensure as much as possible that the cone tip part of the cone structure is all made of the cone tip sheet material and avoid transition diffusion welding between the cone base upper plate and the bottom surface of the cone tip sheet. At the same time, the spacing thickness is thin. During the process of stamping into the cone structure, the material of the spacing part will gradually break from the center, and the breaking interface will gradually diffuse outward until a diffusion interface between the cone tip part and the cone base part is formed at the circumferential edge of the cone tip sheet.

[0031] In a specific embodiment, the cone-based inner core plate is made of copper or silver. In the present invention, the cone-based inner core plate can be made of copper or silver. Copper has excellent thermal conductivity and ductility. Silver is the material with the best thermal conductivity and also has good ductility. The thermal conductivity of pure copper is inferior to that of silver, but its economic efficiency is better than that of silver. Therefore, the specific material can be selected according to the usage scenario.

[0032] In a specific embodiment, the cone tip is made of platinum or its alloy material, or nickel or its alloy material. Nickel has excellent high temperature resistance and ductility, and platinum has a high melting point, good stability, and strong ductility, and can be used in an environment requiring extremely high temperatures. Therefore, both nickel and platinum can be selected as the material of the cone tip.

[0033] In a specific embodiment, the cone base upper plate and the cone base lower plate are made of nickel material or its alloy material, or copper material or its alloy material. The nickel selected in the present invention has excellent high temperature resistance and ductility, so the use of nickel on the outside of the cone base can protect the thermal conductive material inside it and can be used in an extremely high temperature environment; or when the use environment does not require extreme high temperature resistance, the outside of the cone base can also be made of copper material to further improve the thermal conductivity of the cone base.

[0034] In a second aspect, the present invention provides a composite material cone structure based on diffusion welding, which is prepared by using the composite material cone structure preparation method.

[0035] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0036] 1. A composite material cone structure based on diffusion welding and a preparation method thereof provided in an embodiment of the present invention, by splitting the composite material cone structure into multiple components, and then using electron beam welding combined with diffusion welding process to achieve fusion of materials between the components, thereby forming an integral molding structure, which can ensure the consistency of mechanical properties of the composite material in all directions;

[0037] 2. A composite material cone structure based on diffusion welding and a preparation method thereof provided by an embodiment of the present invention does not have powder particles during the stamping diffusion welding forming process. Even if there are pores inside each component, the pore gas can be fully discharged during the diffusion welding fusion process to ensure the density inside the composite material.

[0038] 3. A composite material cone structure based on diffusion welding and a preparation method thereof provided by an embodiment of the present invention, before performing stamping diffusion welding, an annular welding is first performed between the edges of the cone base upper plate and the cone base lower plate, thereby ensuring that no extrusion deformation occurs at this position during diffusion welding, and avoiding the formation of unwelded cracks;

[0039] 4. A composite material cone structure based on diffusion welding and a preparation method thereof provided in an embodiment of the present invention, wherein the cone base inner core plate is designed to be thick outside and thin inside. This is because after the component parts are assembled into a column structure, they are punched into a cone structure from the center. Therefore, the middle part of the cone base upper plate and the cone base lower plate is subjected to the greatest degree of force diffusion deformation. Therefore, the cone base inner core plate is designed to be thinner near the center, which can avoid the inner core of the cone base inner core plate from being exposed during the punching process, and ensure that the outer layer covers the inner core well.

[0040] 5. An embodiment of the present invention provides a composite material cone structure based on diffusion welding and a preparation method thereof, wherein the fitting surfaces of the edges of the cone base upper plate and the cone base inner core plate and the fitting surfaces of the edges of the cone base upper plate and the cone base lower plate are staggered and not on the same plane, thereby ensuring sufficient diffusion welding at the joints between the edges of the three components, and at the same time avoiding damage caused by the annular welding of the cone base inner core plate to the edges of the cone base upper plate and the cone base lower plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of a composite cone structure provided by an embodiment of the present invention;

[0043] Figure 2 A cross-sectional view of a composite cone structure provided by an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the structure of the components provided in the embodiment of the present invention;

[0045] Figure 4A cross-sectional view of the structural assembly of the components provided in the embodiment of the present invention;

[0046] Figure 5 A cross-sectional view of a composite material assembly column structure before diffusion welding provided by an embodiment of the present invention;

[0047] Figure 6 A cross-sectional view of a composite material cone blank after diffusion welding provided in an embodiment of the present invention.

[0048] Reference numerals and corresponding parts names:

[0049] 1-cone tip, 2-cone base outer layer, 3-cone base inner core, 4-cone tip sheet, 5-cone base upper plate, 6-cone base inner core plate, 7-cone base lower plate, 8-profile punch, 9-fixed platform, 10-composite material cone blank structure. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0051] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details do not have to be employed to practice the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures are not specifically described.

[0052] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0054] Example 1

[0055] The composite cone structure involved in the present invention takes the interface cone as an example. Since pure nickel materials and the like are suitable as the high-temperature resistant materials at the tip of the interface cone, and pure copper materials are suitable as the cone-base thermal conductive materials of the interface cone, using different materials at different parts of the interface cone can greatly improve the performance of the interface cone. However, how to better combine the two materials at the two parts has become a difficult problem in the process. Generally, the relatively mature additive manufacturing technology can realize the preparation of composite structural components of various materials, but in the direction perpendicular to the additive stacking direction, the crystal phase and organization / mechanical properties of the material are poor, unmelted powder particles are prone to appear inside, and there are pores inside, so the interface cone cannot be used in a vacuum high-temperature environment.

[0056] Therefore, in order to solve the above technical problems:

[0057] First, as Figure 1 to Figure 6 As shown, the present invention provides a method for preparing a composite material cone structure based on diffusion welding, comprising the following steps:

[0058] (1) Processing the components of the composite cone structure separately;

[0059] (2) Assembling the component parts from top to bottom in sequence to form a column assembly;

[0060] (3) Invert the column assembly into a fixed table 9 having an inverted cone structure processing groove;

[0061] (4) Using a contour punch 8 that is the same as the composite cone structure, the column assembly is punched downward for diffusion welding to obtain a composite cone blank structure 10.

[0062] The present invention splits the composite material cone structure into multiple components and then uses electron beam welding combined with diffusion welding technology to achieve fusion of materials between the components to form an integral molding structure, which can ensure the consistency of mechanical properties of the composite material in all directions.

[0063] Therefore, the present invention creatively decomposes the materials required for the composite material cone structure into multiple plate-like components, and then fuses the components through diffusion welding to form an overall structure during the stamping process. This ensures that the mechanical properties of the material are consistent in all directions and avoids the situation where the mechanical properties are poor in a certain direction. At the same time, during the stamping diffusion welding process, no powder particles will exist. Even if there are pores inside the components, the pore gas can be fully discharged during the diffusion welding fusion process to ensure the density inside the composite material.

[0064] In a specific embodiment, the pressure of diffusion welding is between 0.5 and 50 MPa, and the temperature is between 60% and 80% of the melting point of the material.

[0065] In a specific embodiment, the component parts include a cone tip sheet 4, a cone base upper plate 5, a cone base inner core plate 6 and a cone base lower plate 7 which are assembled in sequence from top to bottom;

[0066] The cone-base inner core plate 6 is an annular plate with a through hole in the center;

[0067] The upper surface of the cone base lower plate 7 has an annular groove matching the diameter of the cone base inner core plate 6;

[0068] The lower surface of the cone-base upper plate 5 is closely fitted with the upper surface of the cone-base inner core plate 6, and after assembly, the center and outer edge of the lower surface can be closely fitted with the center and outer edge of the upper surface of the cone-base lower plate 7;

[0069] The upper surface of the cone base upper plate 5 is provided with a circular groove matching the shape of the cone tip sheet 4 .

[0070] The present invention divides the composite material cone structure into four components, the cone tip sheet 4 serves as the cone tip part, the cone base upper plate 5 and the cone base lower plate 7 serve as the external cladding structure of the cone base part, and the cone base inner core plate 6 serves as the internal core material of the cone base part. The four components are assembled in the specific structure designed above and then stamped from the center into the shape of the cone structure. During the stamping process, the components deform, diffuse and fuse with each other to form an integral integrated structure.

[0071] In a specific embodiment, the thickness of the cone-base inner core plate 6 gradually decreases toward the inner diameter of the ring to form a cone-shaped structure.

[0072] The cone-base inner core plate of the present invention is designed to be thick on the outside and thin on the inside. This is because after the constituent parts are assembled into a columnar structure, they are punched into a conical structure from the center. Therefore, the middle parts of the cone-base upper plate and the cone-base lower plate are subjected to the greatest degree of force diffusion and deformation. Therefore, the cone-base inner core plate is designed to be thinner near the center, which can avoid the inner core of the cone-base inner core plate being exposed during the stamping process, thereby ensuring that the outer layer covers the inner core well.

[0073] In a specific embodiment, before diffusion welding, the annular contact surfaces at the lower surface outer edge of the cone base upper plate 5 and the upper surface outer edge of the cone base lower plate 7 are annularly welded by electron beam welding or laser welding.

[0074] The diffusion welding process adopted by the present invention realizes the fusion of materials, and in the diffusion welding process, the materials are subjected to extrusion pressure from top and bottom. Therefore, before performing stamping diffusion welding, the present invention first performs annular welding between the edges of the cone base upper plate and the cone base lower plate, thereby ensuring that no extrusion deformation occurs at this position during diffusion welding, thereby avoiding the formation of unwelded cracks.

[0075] During circular welding, the welding bonding rate must be ensured to be ≥90% to avoid welding gaps and void welds.

[0076] In a specific embodiment, the thickness of the outer edge of the cone-base inner core plate 6 is less than the thickness of the outer edge of the annular groove. That is, the cone-base inner core plate is completely embedded between the cone-base lower plates, so that the fitting surfaces of the cone-base upper plate and the edge of the cone-base inner core plate and the fitting surfaces of the cone-base upper plate and the edge of the cone-base lower plate can be staggered and not on the same plane, thereby ensuring sufficient diffusion welding at the joints between the edges of the three components, and at the same time, avoiding damage caused by the annular welding of the cone-base inner core plate diffused to the edge of the cone-base upper plate and the cone-base lower plate.

[0077] In a specific embodiment, the spacing between the surface where the center of the lower surface of the cone base upper plate 5 and the center of the upper surface of the cone base lower plate 7 are in contact with the bottom surface of the cone tip sheet 4 is 0.7 mm.

[0078] The present invention designs the spacing thickness between the diffusion bonding surface in the middle of the cone base upper plate and the cone base lower plate and the bonding surface between the cone tip sheet and the cone base upper plate to be very thin, so as to ensure as much as possible that the cone tip part of the cone structure is all made of the cone tip sheet material and avoid transition diffusion welding between the cone base upper plate and the bottom surface of the cone tip sheet. At the same time, the spacing thickness is thin. During the process of stamping into the cone structure, the material of the spacing part will gradually break from the center, and the breaking interface will gradually diffuse outward until a diffusion interface between the cone tip part and the cone base part is formed at the circumferential edge of the cone tip sheet.

[0079] In a specific embodiment, the cone-base inner core plate 6 is made of copper or silver. In the present invention, the cone-base inner core plate can be made of copper or silver. Copper has excellent thermal conductivity and ductility. Silver is the material with the best thermal conductivity and also has good ductility. The thermal conductivity of pure copper is inferior to that of silver, but its economic efficiency is better than that of silver. Therefore, the specific material can be selected according to the usage scenario.

[0080] In a specific embodiment, the cone tip 4 is made of platinum or its alloy material, or nickel or its alloy material. Nickel has excellent high temperature resistance and ductility, and platinum has a high melting point, good stability, and strong ductility, and can be used in an environment requiring extremely high temperature. Therefore, nickel and platinum can be selected as the material of the cone tip.

[0081] In a specific embodiment, the cone base upper plate 5 and the cone base lower plate 7 are made of nickel material or its alloy material, or copper material or its alloy material. The nickel selected in the present invention has excellent high temperature resistance and ductility, so the use of nickel on the outside of the cone base can protect the thermal conductive material inside it and can be used in an extremely high temperature environment; or when the use environment does not require extreme high temperature resistance, the outside of the cone base can also be made of copper material to further improve the thermal conductivity of the cone base.

[0082] In a specific embodiment, the obtained composite material cone blank structure 10 is machined to precise dimensions using a mechanical processing method.

[0083] In a second aspect, the present invention provides a composite material cone structure based on diffusion welding, which is prepared by using the composite material cone structure preparation method.

[0084] Example 2

[0085] The embodiment of the present invention provides a composite material cone structure based on diffusion welding, which is prepared by the preparation method described in Example 1, wherein:

[0086] The cone tip is made of platinum, with an outer diameter precision of 8-10mm, a thickness of 0.8-1.5mm, a surface roughness of Ra0.8um, and a dimensional precision of 0.04mm;

[0087] The cone base upper plate adopts nickel upper layer, the outer diameter size accuracy is controlled at 53-55mm, the thickness is controlled at 1.5-2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05;

[0088] The cone base inner core plate adopts a copper ring, the outer diameter size accuracy is controlled at 48-50mm, the thickness is controlled at 1.5-2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05°.

[0089] The cone base lower plate adopts a nickel lower layer, the outer diameter dimensional accuracy is controlled at 53-55mm, the thickness is controlled at 2.5-4mm, the surface roughness is Ra0.8um, the dimensional accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05.

[0090] After the parts are assembled together, they are first annularly welded and then diffusion welded to obtain the nickel / copper / platinum composite material cone blank structure, and then mechanically processed to precise dimensions to obtain the nickel / copper / platinum composite material interface cone.

[0091] Example 3

[0092] The embodiment of the present invention provides a composite material cone structure based on diffusion welding, which is prepared by the preparation method described in Example 1, wherein:

[0093] The cone tip and cone base upper plate are both made of nickel, and the two are integral structures. The outer diameter size accuracy is controlled at 53-55mm, the thickness is controlled at 1.5-2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05;

[0094] The cone base inner core plate adopts a copper ring, the outer diameter size accuracy is controlled at 48-50mm, the thickness is controlled at 1.5-2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05°.

[0095] The cone base lower plate adopts a nickel lower layer, the outer diameter dimensional accuracy is controlled at 53-55mm, the thickness is controlled at 2.5-4mm, the surface roughness is Ra0.8um, the dimensional accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05.

[0096] After assembling the parts together, they are first annularly welded and then diffusion welded to obtain the nickel / copper composite material cone blank structure, and then mechanically processed to precise dimensions to obtain the nickel / copper composite material interface cone.

[0097] Example 4

[0098] The embodiment of the present invention provides a composite material cone structure based on diffusion welding, which is prepared by the preparation method described in Example 1, wherein:

[0099] The cone tip is made of platinum, with an outer diameter precision of 8-10mm, a thickness of 0.8-1.5mm, a surface roughness of Ra0.8um, and a dimensional precision of 0.04mm;

[0100] The cone base upper plate adopts nickel upper layer, the outer diameter size accuracy is controlled at 53-55mm, the thickness is controlled at 1.5-2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05;

[0101] The cone base inner core plate adopts a silver ring, the outer diameter size accuracy is controlled at 48-50mm, the thickness is controlled at 1.5~2.5mm, the surface roughness is Ra0.8um, the size accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05°.

[0102] The cone base lower plate adopts a nickel lower layer, the outer diameter dimensional accuracy is controlled at 53-55mm, the thickness is controlled at 2.5-4mm, the surface roughness is Ra0.8um, the dimensional accuracy is controlled at 0.04mm, and the angle accuracy is controlled at ±0.05.

[0103] After the parts are assembled together, they are first circularly welded and then diffusion welded to obtain a nickel / silver / platinum composite material cone blank structure. After machining to precise dimensions, a nickel / silver / platinum composite material interface cone can be obtained, which can meet usage scenarios with extremely high thermal conductivity requirements.

[0104] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a composite material pyramid structure based on diffusion welding, characterized in that: The steps include: (1) Processing the components of the composite cone structure separately; (2) Assembling the component parts from top to bottom in sequence to form a column assembly; (3) Invert the column assembly into a fixed table with a groove machined into an inverted cone structure; (4) Using a contoured punch with the same structure as the composite cone, the column assembly is punched downward for diffusion welding.

2. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 1, characterized in that: The component parts include a cone tip sheet (4), a cone base upper plate (5), a cone base inner core plate (6) and a cone base lower plate (7) which are assembled in sequence from top to bottom; The cone-based inner core plate (6) is an annular plate with a through hole in the center; The upper surface of the cone base lower plate (7) has an annular groove matching the diameter of the cone base inner core plate (6); The lower surface of the cone-base upper plate (5) is closely fitted with the shape of the upper surface of the cone-base inner core plate (6), and after assembly, the center and outer edge of the lower surface can be closely fitted with the center and outer edge of the upper surface of the cone-base lower plate (7); The upper surface of the cone base upper plate (5) is provided with a circular groove matching the shape of the cone tip sheet (4).

3. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The thickness of the cone-based inner core plate (6) gradually decreases towards the inner diameter of the ring to form a cone-shaped structure.

4. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: Before diffusion welding, the annular contact surfaces at the outer edge of the lower surface of the cone base upper plate (5) and the outer edge of the upper surface of the cone base lower plate (7) are welded by electron beam welding or laser welding.

5. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The thickness of the outer edge of the cone-base inner core plate (6) is smaller than the thickness of the outer edge of the annular groove.

6. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The spacing between the surface where the center of the lower surface of the cone base upper plate (5) and the center of the upper surface of the cone base lower plate (7) are in contact with each other and the bottom surface of the cone tip sheet (4) is 0.6-0.8 mm.

7. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The cone-base inner core plate (6) is made of copper or silver.

8. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The cone tip sheet (4) is made of platinum material or its alloy material, or nickel material or its alloy material.

9. The method for preparing a composite material pyramid structure based on diffusion welding according to claim 2, characterized in that: The cone base upper plate (5) and the cone base lower plate (7) are made of nickel material or its alloy material, or copper material or its alloy material.

10. A composite pyramid structure based on diffusion welding, characterized in that: The composite material cone structure is prepared by the preparation method of any one of claims 1 to 9.

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