Manufacturing process of metal ceramic integrated fastener

Abstract

The invention discloses a manufacturing process of a metal ceramic integrated fastener, relates to the technical field of fastener production, and can solve the problem of the manufacturing process of the metal ceramic integrated fastener. The manufacturing process of the metal ceramic integrated fastener comprises the following steps that S1, a metal section and a ceramic-based composite material section are independently prepared; s2, the metal section and the ceramic-based composite material section are installed in a connecting and shaping tool, the metal section and the ceramic-based composite material section are made to be coaxial, and the space between the metal section and the ceramic-based composite material section is filled with connecting welding flux; and S3, the connecting and shaping tool provided with the metal section, the ceramic-based composite material section and the connecting welding flux is put into a heating diffusion welding machine, the metal section and the ceramic-based composite material section are welded and fixed into a whole in a liquid-phase diffusion connection mode, and the metal-ceramic-integrated semi-finished fastener is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of fastener production, and in particular to a manufacturing process of a metal-ceramic integrated fastener. Background Art

[0002] With the development of high-performance fields such as aerospace and automobile manufacturing, the demand for metal-ceramic integrated fasteners is increasing to meet the connection requirements under different temperatures and environments. Due to the differences in physical and chemical properties, it is usually difficult to achieve high-strength and high-stability connections between traditional metal and ceramic materials. In the existing technology, the connection methods between metal and ceramic, such as mechanical connection, adhesive connection, etc., often cannot overcome the problems of contact failure and material damage under high temperature and complex load conditions.

[0003] In response to this challenge, the present invention proposes an innovative preparation process for metal-ceramic-based integrated fasteners. The preparation process of the present invention will provide important technical support for the practical application of metal-ceramic-based integrated fasteners and promote innovation and development in related fields. Summary of the invention

[0004] The purpose of the present application is to provide a manufacturing process for a metal-ceramic integrated fastener, so as to solve the manufacturing process problem of the metal-ceramic integrated fastener.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] The present application provides a manufacturing process of a metal-ceramic integrated fastener, comprising the following steps:

[0007] S1. independently preparing a metal segment and a ceramic-based composite segment;

[0008] S2, installing the metal segment and the ceramic-based composite segment into the connection shaping fixture, making the metal segment and the ceramic-based composite segment coaxial, and filling the connection solder between the metal segment and the ceramic-based composite segment;

[0009] S3. Place the connection shaping tooling equipped with the metal segment, the ceramic-based composite segment and the connection solder into a heated diffusion welding machine, and use liquid phase diffusion bonding to weld and fix the metal segment and the ceramic-based composite segment into one, so as to obtain a metal-ceramic integrated semi-finished fastener.

[0010] Furthermore, the method further includes S4, performing surface grinding treatment on the semi-finished fastener in S3;

[0011] And S5, performing surface coating treatment on the threaded portion of the semi-finished fastener after surface grinding treatment to obtain a finished metal-ceramic integrated fastener.

[0012] Furthermore, the coating material of the threaded portion is molybdenum disulfide, and the coating thickness is 0.005 mm to 0.015 mm.

[0013] Further, in S1, the metal segment preparation comprises the following steps:

[0014] S111, grinding processing, grinding the metal bar to a preset size;

[0015] S112, solution treatment, solution treatment temperature 750 ° C, solution treatment time is 90min to 150min;

[0016] S113, aging treatment, aging temperature 250 ℃ to 300 ℃, aging treatment time 200min to 280min;

[0017] S114, thread rolling treatment, obtaining a semi-finished metal segment with a threaded portion through cold rolling forming;

[0018] S115, sandblasting to obtain a finished metal segment.

[0019] Further, in S1, the preparation of the ceramic-based composite material segment includes the following steps:

[0020] S121, weaving a braided body using a ceramic fiber bundle;

[0021] S122, shaping the braided body into a preform by using a shaping mold;

[0022] S123, performing at least one interface deposition process on the preform using a precursor gas;

[0023] S124, roughly machining the appearance of the ceramic-based composite material segment;

[0024] S125, using a precursor liquid to sequentially perform vacuum impregnation treatment, pressure impregnation treatment, and curing treatment on the roughly machined ceramic-based composite material segment;

[0025] S126, finishing the ceramic-based composite material segment after the impregnation and curing treatment to a preset size;

[0026] S127, performing multiple surface deposition treatments on the ceramic-based composite material segment after the impregnation and curing treatment to obtain a finished ceramic-based composite material segment.

[0027] Further, in S123, the precursor gas used is boron nitride, and during the interface deposition process:

[0028] The deposition temperature is 600°C to 900°C;

[0029] The deposition rate was 1 μm / min;

[0030] Single deposition time: 30h to 40h;

[0031] The number of depositions is: 2 to 6 times.

[0032] Further, in S125, the precursor liquid used is a polycarbosilane xylene solvent;

[0033] During vacuum impregnation:

[0034] The vacuum impregnation temperature is: 40°C to 45°C, the vacuum impregnation time is: 2h, and the vacuum degree is: minus 0.081Mpa to 0.096Mpa;

[0035] During pressure impregnation:

[0036] The pressure of pressure impregnation is: 3Mpa to 5Mpa, and the duration of pressure impregnation is: 2h;

[0037] During the curing process:

[0038] The curing temperature is 180°C to 200°C and the curing time is 8 hours.

[0039] Further, in S127, the deposited material is silicon carbide;

[0040] When performing surface deposition treatment, a single deposition time is 60h to 80h, and the deposition temperature is 900°C to 1000°C;

[0041] The number of surface deposition treatments in S127 is not less than 6 times.

[0042] Furthermore, in S3, when liquid phase diffusion bonding is performed, the ambient vacuum in the heated diffusion welding machine needs to be lower than -0.065 MPa, and at the same time, the internal temperature is heated to no less than 1100°C and maintained for at least 45 minutes, followed by nitrogen cooling for 5 to 8 hours.

[0043] Furthermore, in S3, when liquid phase diffusion bonding is performed, the connection shaping tooling will continuously apply a thrust toward the connection solder to the metal segment and / or the ceramic-based composite segment.

[0044] Beneficial effects of the present invention:

[0045] The process of the present application is to manufacture the metal segment and the ceramic-based composite segment of the metal-ceramic integrated fastener independently and then connect them by liquid phase diffusion of connecting solder. This can not only ensure that the physical and chemical properties of the metal segment and the ceramic-based composite segment reach the optimal state, but also achieve a high-strength bond between metal and ceramic, overcoming the contact failure and material damage problems under high temperature and complex load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the process flow of Example 1 of the present application.

[0047] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 2 of the present application.

[0048] Figure 3 This is a schematic diagram of the cross-sectional structure of Example 2 of the present application.

[0049] Figure 4 This is a schematic diagram of the three-dimensional explosion structure of Example 3 of the present application.

[0050] Figure 5 This is a schematic diagram of the cross-sectional explosion structure of Example 3 of the present application.

[0051] Explanation of the reference numerals: 11-metal segment, 111-threaded portion, 12-ceramic-based composite segment, 13-solder segment; 2-connecting cylinder, 21-connecting through hole, 3-pressing block, 41-accommodating cylinder body, 411-connecting external thread, 412-accommodating cavity, 42-accommodating cover body, 421-connecting internal thread, 5-pushing spring. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0053] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and 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, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0056] Embodiment 1:

[0057] like Figure 1 As shown, the present application provides a manufacturing process of a metal-ceramic integrated fastener, comprising the following steps:

[0058] S1, independently preparing a metal segment 11 and a ceramic-based composite segment 12;

[0059] S2, installing the metal segment 11 and the ceramic-based composite segment 12 into the connection shaping tooling, making the metal segment 11 and the ceramic-based composite segment 12 coaxial, and filling the connection solder between the metal segment 11 and the ceramic-based composite segment 12;

[0060] S3. Place the connection shaping tooling equipped with the metal segment 11, the ceramic-based composite segment 12, and the connection solder into a heated diffusion welding machine, and use liquid phase diffusion bonding to weld and fix the metal segment 11 and the ceramic-based composite segment 12 into one, so as to obtain a metal-ceramic integrated semi-finished fastener.

[0061] In the process of this embodiment, the metal segment 11 and the ceramic-based composite segment 12 of the metal-ceramic integrated fastener are prepared independently and then connected by liquid phase diffusion of connecting solder. This can not only ensure that the physical and chemical properties of the metal segment 11 and the ceramic-based composite segment 12 reach the optimal state, but also achieve a high-strength bond between metal and ceramic, overcoming the contact failure and material damage problems under high temperature and complex load conditions.

[0062] The connecting solder in this embodiment can refer to the welding flux disclosed in our patent application number CN202210024471.0, and the patent name is a welding flux for connecting silicon carbide ceramics and a preparation method thereof, to ensure the stability of the metal and ceramic after welding.

[0063] Specifically, in this embodiment, if Figure 1 As shown, the method further includes S4, performing surface grinding treatment on the semi-finished fastener in S3;

[0064] And S5, performing surface coating treatment on the threaded portion 111 of the semi-finished fastener after surface grinding treatment to obtain a finished metal-ceramic integrated fastener.

[0065] Specifically, in this embodiment, the coating material of the threaded portion 111 is molybdenum disulfide, and the coating thickness is 0.005 mm to 0.015 mm.

[0066] Specifically, in this embodiment, in S1, the preparation of the metal segment 11 includes the following steps:

[0067] S111, grinding processing, grinding the metal bar to a preset size;

[0068] S112, solution treatment, solution treatment temperature 750 ° C, solution treatment time is 90min to 150min, quenching time is within 6s;

[0069] S113, aging treatment, aging temperature 250 ℃ to 300 ℃, aging treatment time 200min to 280min;

[0070] S114, thread rolling treatment, obtaining a semi-finished metal segment 11 having a threaded portion 111 through cold rolling forming;

[0071] S115, sandblasting to obtain a finished metal segment 11.

[0072] In this embodiment, the metal bar can be an alloy bar with a diameter of 20 mm. In S111, a CNC machine tool can be used for centerless grinding. The grinding speed parameter during the grinding process can be 1000 r / min, and the grinding depth can be 1 mm. The technician can also select other grinding equipment and grinding parameters for grinding according to needs. In S111, the purpose is mainly to grind the metal bar to a preset size. In this embodiment, the preset diameter size is 17 mm. After cold rolling, the size of the threaded portion 111 of the metal segment 11 is M16.

[0073] Specifically, in this embodiment, in S1, the preparation of the ceramic-based composite material segment 12 includes the following steps:

[0074] S121, weaving a braided body using a ceramic fiber bundle;

[0075] S122, shaping the braided body into a preform by using a shaping mold;

[0076] S123, performing at least one interface deposition process on the preform using a precursor gas;

[0077] S124, roughly machining the shape of the ceramic-based composite material segment 12;

[0078] S125, using a precursor liquid to sequentially perform vacuum impregnation treatment, pressure impregnation treatment and curing treatment on the roughly machined ceramic-based composite material segment 12;

[0079] S126, finishing the ceramic-based composite material segment 12 after the impregnation and curing treatment to a preset size;

[0080] S127, the ceramic-based composite material segment 12 after the impregnation and curing treatment is subjected to multiple surface deposition treatments to obtain a finished ceramic-based composite material segment 12. The ceramic fiber material in this embodiment is SiC, and 500 fibers are bundled to form a woven body by hand. The shaping mold in this embodiment can be a shaping mold for making ceramic material fasteners, or a technician can design it according to needs, which will not be described in detail here.

[0081] Specifically, in this embodiment, in S123, the precursor gas used is boron nitride, and during the interface deposition process:

[0082] The deposition temperature is 600°C to 900°C;

[0083] The deposition rate was 1 μm / min;

[0084] Single deposition time: 30h to 40h;

[0085] The number of depositions is 2 to 6 times. In this embodiment, the number of interface depositions is 2 times. Through the interface deposition step, the precursor gas can be deposited into the gaps between the fiber bundles to fill the gaps in the fiber bundles and complete the densification.

[0086] Specifically, in this embodiment, in S125, the precursor liquid used is polycarbosilane xylene solvent;

[0087] During vacuum impregnation:

[0088] The vacuum impregnation temperature is: 40°C to 45°C, the vacuum impregnation time is: 2h, and the vacuum degree is: minus 0.081Mpa to 0.096Mpa;

[0089] During pressure impregnation:

[0090] The pressure of the pressure impregnation is: 3Mpa to 5Mpa, and the pressure impregnation time is: 2h. The pressure of the pressure impregnation in this embodiment is 3Mpa;

[0091] During the curing process:

[0092] The curing temperature is 180°C to 200°C and the curing time is 8 hours.

[0093] Specifically, in this embodiment, in S127, the deposited material is silicon carbide;

[0094] When performing surface deposition treatment, a single deposition time is 60h to 80h, and the deposition temperature is 900°C to 1000°C;

[0095] The number of surface deposition treatments in S127 is not less than 6 times.

[0096] Specifically, in this embodiment, in S3, when liquid phase diffusion bonding is performed, the ambient vacuum in the heated diffusion welding machine needs to be lower than -0.065Mpa, and at the same time, its internal temperature is heated to not less than 1100°C and maintained for at least 45 minutes, and then nitrogen is introduced to cool for 5 to 8 hours.

[0097] Specifically, in this embodiment, in S3, when liquid phase diffusion bonding is performed, the connection shaping tool will continuously apply a thrust toward the connection solder to the metal segment 11 and / or the ceramic-based composite segment 12 .

[0098] By applying a thrust toward the connecting solder to the metal segment 11 and / or the ceramic-based composite segment 12 during liquid phase diffusion connection, when the connecting solder is converted into a liquid phase at high temperature, a gap is avoided between the metal segment 11 and the ceramic-based composite segment 12, thereby ensuring the connection stability after the metal segment 11 and the ceramic-based composite segment 12 are connected as one.

[0099] Embodiment 2:

[0100] like Figure 2 and Figure 3 As shown, this embodiment provides a metal-ceramic integrated fastener, which is manufactured by the manufacturing process of the above-mentioned embodiment 1, and includes a metal segment 11 and a ceramic-based composite segment 12 that are integrally fixedly connected, and a threaded portion 111 is provided on the metal segment 11.

[0101] Specifically, in this embodiment, a solder segment 13 is further provided, and the metal segment 11 and the ceramic-based composite segment 12 are welded and fixed into one body through the solder segment 13 .

[0102] Specifically, in this embodiment, the surface of the threaded portion 111 of the metal segment 11 is also coated with a molybdenum disulfide coating with a thickness of 0.005 mm to 0.015 mm.

[0103] Specifically, in this embodiment, the end surface of the metal segment 11 close to the ceramic-based composite segment 12 is a plane, and the end surface of the ceramic-based composite segment 12 close to the metal segment 11 is also a plane. In some embodiments, technicians can set the end surfaces of the metal segment 11 and the ceramic-based composite segment 12 close to each other into matching concave and convex surfaces as needed to improve the bending moment performance parameters. In some embodiments, technicians can also set rectangular grooves and rectangular protrusions on the end surfaces of the metal segment 11 and the ceramic-based composite segment 12 close to each other as needed to improve the bending moment performance parameters and torque performance parameters.

[0104] Specifically, in the present embodiment, the size of the threaded portion 111 is M16, and technicians can set the size of the threaded portion 111 and the fastener to other sizes as needed to adapt to different connection holes.

[0105] Embodiment 3:

[0106] like Figure 4 and Figure 5As shown, this embodiment provides a connecting and fixing tool for a metal-ceramic integrated fastener, which is applicable to the manufacturing process of a metal-ceramic integrated fastener described in Example 1, and includes a accommodating cylinder assembly having an accommodating cavity 412, and a connecting cylinder 2 for axially positioning the metal segment 11 and the ceramic-based composite segment 12, and the connecting cylinder 2 is arranged in the accommodating cavity 412 of the accommodating cylinder assembly;

[0107] The connecting tube 2 is provided with a connecting through hole 21 for mounting the metal section 11 and the ceramic-based composite material section 12;

[0108] It also includes a pressing block 3 which is disposed in the accommodating cavity 412 and can slide freely inside the accommodating cavity 412 along the axis thereof.

[0109] Specifically, in the present embodiment, an elastic top-pressing structure is further included in the accommodating cavity 412. By providing the elastic top-pressing structure, during liquid phase diffusion connection, the elastic top-pressing structure can continuously apply a thrust toward the connecting solder to the metal segment 11 or the ceramic-based composite segment 12, so that after the metal-ceramic integrated fastener is manufactured, the solder segment 13 will not be hollowed after cooling due to the liquefaction process, thereby affecting the connection stability.

[0110] Specifically, in this embodiment, the elastic top pressure structure is a top push spring 5 made of high temperature alloy material. The top push spring 5 can be in the form of a spiral spring, a disc spring, etc., and the technicians can set it according to the needs, which will not be repeated here.

[0111] Specifically, in this embodiment, the accommodating cylinder assembly includes an accommodating cylinder body 41 and an accommodating cover body 42, and the accommodating cylinder body 41 and the accommodating cover body 42 are detachably fixedly connected via threads.

[0112] Specifically, the open end of the accommodating tube body 41 is provided with a connecting external thread 411, and the accommodating cover body 42 is provided with a connecting internal thread 421 adapted to the connecting external thread 411. The accommodating tube body 41 and the accommodating cover body 42 are connected and fixed by the connecting external thread 411 and the connecting internal thread 421.

[0113] Specifically, in the present embodiment, the push spring 5 is fixed on the accommodating cover body 42 . In some embodiments, the push spring 5 may also be fixed in the accommodating tube body 41 .

[0114] The pressing block 3 in this embodiment is a cylindrical pressing block 3 , and its cross-sectional shape is the same as the cross-sectional shape of the accommodating cavity 412 .

[0115] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A process for manufacturing a metal-ceramic integrated fastener, characterized in that: The following steps are involved: S1, independently preparing a metal segment (11) and a ceramic-based composite segment (12); S2, installing the metal segment (11) and the ceramic-based composite segment (12) into a connection and shaping tooling, making the metal segment (11) and the ceramic-based composite segment (12) coaxial, and filling a connection solder between the metal segment (11) and the ceramic-based composite segment (12); S3. Place the connection shaping tooling equipped with the metal segment (11), the ceramic-based composite segment (12) and the connection solder into a heated diffusion welding machine, and use liquid phase diffusion bonding to weld and fix the metal segment (11) and the ceramic-based composite segment (12) into one body, thereby obtaining a metal-ceramic integrated semi-finished fastener.

2. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: The method further includes S4, performing surface grinding treatment on the semi-finished fastener in S3; And S5, performing surface coating treatment on the threaded portion (111) of the semi-finished fastener after surface grinding treatment to obtain a finished metal-ceramic integrated fastener.

3. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: The coating material of the threaded portion (111) is molybdenum disulfide, and the coating thickness is 0.005 mm to 0.015 mm.

4. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: In S1, the preparation of the metal segment (11) comprises the following steps: S111, grinding processing, grinding the metal bar to a preset size; S112, solution treatment, solution treatment temperature 750 ° C, solution treatment time is 90min to 150min; S113, aging treatment, aging temperature 250 ℃ to 300 ℃, aging treatment time 200min to 280min; S114, thread rolling treatment, obtaining a semi-finished metal segment (11) having a threaded portion (111) through cold rolling forming; S115, sandblasting to obtain a finished metal segment (11).

5. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: In S1, the preparation of the ceramic-based composite material segment (12) comprises the following steps: S121, weaving a braided body using a ceramic fiber bundle; S122, shaping the braided body into a preform by using a shaping mold; S123, performing at least one interface deposition process on the preform using a precursor gas; S124, roughly machining the outer shape of the ceramic-based composite material segment (12); S125, using a precursor liquid to sequentially perform vacuum impregnation treatment, pressure impregnation treatment and curing treatment on the roughly processed ceramic-based composite material segment (12); S126, finishing the ceramic-based composite material segment (12) after the impregnation and curing treatment to a preset size; S127, performing multiple surface deposition treatments on the ceramic-based composite material segment (12) after the impregnation and curing treatment to obtain a finished ceramic-based composite material segment (12).

6. The manufacturing process of a metal-ceramic integrated fastener according to claim 5, characterized in that: In S123, the precursor gas used is boron nitride, and during the interface deposition process: The deposition temperature is 600°C to 900°C; The deposition rate was 1 μm / min; Single deposition time: 30h to 40h; The number of depositions is: 2 to 6 times.

7. The manufacturing process of a metal-ceramic integrated fastener according to claim 5, characterized in that: In S125, the precursor liquid used is polycarbosilane xylene solvent; During vacuum impregnation: The vacuum impregnation temperature is: 40°C to 45°C, the vacuum impregnation time is: 2h, and the vacuum degree is: minus 0.081Mpa to 0.096Mpa; During pressure impregnation: The pressure of pressure impregnation is: 3Mpa to 5Mpa, and the duration of pressure impregnation is: 2h; During the curing process: The curing temperature is 180°C to 200°C and the curing time is 8 hours.

8. The manufacturing process of a metal-ceramic integrated fastener according to claim 5, characterized in that: In S127, the deposited material is silicon carbide; When performing surface deposition treatment, a single deposition time is 60h to 80h, and the deposition temperature is 900°C to 1000°C; The number of surface deposition treatments in S127 is not less than 6 times.

9. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: In S3, when liquid phase diffusion bonding is performed, the ambient vacuum in the heated diffusion welding machine needs to be lower than -0.065Mpa, and at the same time, its internal temperature is heated to no less than 1100°C and maintained for at least 45 minutes, followed by nitrogen cooling for 5 to 8 hours.

10. The manufacturing process of a metal-ceramic integrated fastener according to claim 1, characterized in that: In S3, when liquid phase diffusion bonding is performed, the connection shaping tool will continuously apply a thrust toward the connection solder to the metal section (11) and / or the ceramic-based composite material section (12).

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