Tungsten copper composite part with internal cooling flow channel

Abstract

The invention relates to the technical field of tungsten-copper composite part connection, in particular to a tungsten-copper composite part with an internal cooling runner, which comprises a copper ring, a cooling ring groove is formed in the upper surface of the copper ring, two fixing pipes are embedded in the bottom of the cooling ring groove, and clamping rings are fixedly connected to the lower ends of the inner walls of the fixing pipes. Four clamping blocks are fixedly connected to the upper surface of the copper ring, a tungsten plate is connected to the upper surface of the copper ring in a clamped mode, an outer conical face is arranged on the outer wall of the tungsten plate, a copper ring is connected to the outer wall of the tungsten plate in a clamped mode, and an inner conical face is arranged on the inner wall of the copper ring. The copper ring and the copper ring are clamped and fixed through the T-shaped clamping block and the arc-shaped clamp, the tungsten plate and the copper ring are positioned through tight attachment of the outer conical surface and the inner conical surface, stable connection is formed before high-temperature welding, and the interface staggering defect caused by metal surface friction in the welding process is avoided.

Description

Technical Field

[0001] This invention relates to the field of tungsten-copper composite connection technology, specifically a tungsten-copper composite with internal cooling channels. Background Technology

[0002] Tungsten-copper composites are composite material parts made of copper and tungsten. By combining copper and tungsten in a laminated or composite manner, the advantages of both are brought into play. Tungsten has a melting point as high as 3422℃ and a hardness of 400HV, which provides good structural support for copper-tungsten composites, enabling them to resist arc erosion and mechanical wear. Copper has excellent electrical and thermal conductivity, which makes up for the shortcomings of tungsten in these aspects, giving copper-tungsten composites good electrical and thermal conductivity.

[0003] For example, CN120115806A discloses a diffusion welding method for tungsten and copper alloys and tungsten-copper alloy welded parts. This method solves the problems of difficulty in forming a metallurgical bond between a single-layer copper interlayer and tungsten, easy formation of interface defects during casting, and insufficient thermal conductivity of a single-layer iron interlayer. However, the surface coefficients of each metal material are different, and friction is unavoidable during diffusion welding. This can lead to the possibility of interlacing of the weld surfaces. Furthermore, diffusion welding can lead to alloying of the tungsten and copper joint surfaces, which can reduce the mechanical strength of the joint. The different degrees of deformation under external force can easily cause the internal tensile force generated to lead to the fracture of the joint of the composite part. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a tungsten-copper composite component with internal cooling channels.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a tungsten-copper composite component with an internal cooling channel, including a copper ring, a cooling ring groove formed on the upper surface of the copper ring, two fixing tubes embedded in the bottom of the cooling ring groove, a snap ring fixedly connected to the lower end of the inner wall of the fixing tube, four snap blocks fixedly connected to the upper surface of the copper ring, a tungsten plate snapped onto the upper surface of the copper ring, an outer conical surface formed on the outer wall of the tungsten plate, a copper ring snapped onto the outer wall of the tungsten plate, an inner conical surface formed on the inner wall of the copper ring, four arc-shaped sliding grooves formed in a ring on the surface of the copper ring, and arc-shaped clips fixedly connected to the inner wall of the arc-shaped sliding grooves.

[0006] Specifically, the center cross-section of the card block is T-shaped, and the diameter of the card block is the same as the distance between the inner walls of the arc-shaped groove.

[0007] Specifically, the inner wall of the arc-shaped clip matches the lower outer wall of the clip block, and the clip block is engaged inside the arc-shaped clip.

[0008] Specifically, the outer conical surface and the inner conical surface are in contact with each other, and the inclined surface of the outer conical surface is set upward.

[0009] Specifically, the cooling ring groove is located at the lower end of the tungsten plate, and the opening of the cooling ring groove is completely in contact with the lower surface of the tungsten plate.

[0010] A method for connecting a tungsten-copper composite component with internal cooling channels includes the following steps: S1: First, the upper surface of the copper ring, the outer conical surface of the tungsten plate, and the inner conical surface of the copper ring are ground and polished to remove the surface oxide layer and impurities. After grinding, the surface roughness is controlled to Ra≤0.8μm. Then, ultrasonic cleaning technology is used to deeply clean the connecting surfaces of each component to remove microscopic residual impurities. After drying, it is ready for use. S2: Place the tungsten plate on the upper surface of the copper ring, so that the lower surface of the tungsten plate completely covers the opening of the cooling ring groove, and the axis of the tungsten plate coincides with the axis of the copper ring to ensure the precise fit of the connection interface. S3: Insert the copper ring from the top of the tungsten plate, aligning the inner conical surface of the copper ring with the outer conical surface of the tungsten plate. Slowly slide the copper ring downwards until the lower end of the copper ring contacts the upper surface of the copper ring. At this point, the arc-shaped groove on the copper ring corresponds one-to-one with the locking block on the copper ring. S4: Rotate the copper ring clockwise by 15° to make the locking block slide along the arc-shaped groove and lock into the arc-shaped clip. The arc-shaped clip is in close contact with the outer wall of the locking block to achieve mechanical fixation of the copper ring and the copper ring, forming a pre-assembled whole. S5: Place the pre-assembled copper ring, tungsten plate, and copper ring into the vacuum chamber of the diffusion welding machine, close the chamber, and evacuate to a vacuum level ≤5×10⁻⁶. -3 Pa, to avoid oxidation of the metal surface during welding; S6: Start the diffusion welding machine to perform step heating. In the first stage, heat up to 600-700℃ at a rate of 5-8℃ / min and hold for 30-40min to achieve pre-release of interfacial stress. In the second stage, heat up to 950-1050℃ at a rate of 3-5℃ / min and hold for 60-90min. S7: After heating to the target temperature, apply an axial pressure of 8-12MPa. The pressure is kept uniform and stable. The pressure promotes the diffusion and penetration between copper and tungsten atoms to form a dense metallurgical bonding layer. During the welding process, the temperature and pressure closed-loop control system of the welding machine is used to monitor and adjust the welding parameters in real time to ensure the uniformity of interface diffusion. S8: After diffusion welding is completed, the furnace is cooled at a rate of 2-3℃ / min to below 300℃, and then naturally cooled to room temperature to avoid thermal stress caused by rapid cooling leading to interface cracking. S9: After cooling, remove the composite part and perform non-destructive testing on the welding interface to check for defects such as incomplete welding and cracks. Perform flow test on the cooling channel to ensure that the fixed pipe and the cooling ring groove are smoothly connected and there is no blockage.

[0011] The beneficial effects of this invention are: (1) The tungsten-copper composite with internal cooling channels described in this invention avoids the interface alloying problem caused by traditional diffusion welding by adopting a mechanical snap-fit ​​and conical surface fitting connection structure. The copper ring and copper ring are fixed by the snap-fit ​​of T-shaped blocks and arc-shaped clips. The tungsten plate and copper ring are positioned by the tight fitting of the outer conical surface and the inner conical surface, forming a stable connection before high-temperature welding, avoiding the interface cross-linking defects caused by metal surface friction during welding.

[0012] (2) The tungsten-copper composite with internal cooling channels described in this invention provides a strengthening effect for the connection between copper and tungsten by fixing the T-shaped block and the arc-shaped clip, preventing the mechanical strength of the connection from being reduced due to alloying, significantly improving the structural stability and fracture resistance of the composite, and effectively solving the problem of internal tensile force caused by deformation difference under external force. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 A schematic diagram of the structure of a tungsten-copper composite component with internal cooling channels provided by the present invention; Figure 2 A schematic cross-sectional structure of a tungsten-copper composite component with internal cooling channels provided by the present invention. Figure 1 ; Figure 3 A schematic diagram of a copper ring structure for a tungsten-copper composite component with internal cooling channels provided by the present invention; Figure 4 A schematic diagram of a copper ring structure for a tungsten-copper composite component with internal cooling channels provided by the present invention; Figure 5 A schematic diagram of a tungsten plate structure for a tungsten-copper composite component with internal cooling channels provided by the present invention; Figure 6 A schematic diagram of a tungsten-copper composite component with internal cooling channels provided by the present invention; Figure 7 This invention provides a schematic diagram of an arc-shaped clip structure for a tungsten-copper composite component with internal cooling channels.

[0015] In the diagram: 1. Copper ring; 2. Cooling ring groove; 3. Fixing pipe; 4. Snap ring; 5. Clip block; 6. Tungsten plate; 7. Outer conical surface; 8. Copper ring; 9. Inner conical surface; 10. Arc-shaped slide groove; 11. Arc-shaped clip. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] Please see Figures 1 to 7 The present invention provides the following technical solutions: Example 1: A tungsten-copper composite component with internal cooling channels includes a copper ring 1, a cooling ring groove 2 on the upper surface of the copper ring 1, two fixing tubes 3 embedded at the bottom of the cooling ring groove 2, a snap ring 4 fixedly connected to the lower end of the inner wall of the fixing tube 3, four snap blocks 5 fixedly connected to the upper surface of the copper ring 1, a tungsten plate 6 snapped onto the upper surface of the copper ring 1, an outer conical surface 7 on the outer wall of the tungsten plate 6, a copper ring 8 snapped onto the outer wall of the tungsten plate 6, an inner conical surface 9 on the inner wall of the copper ring 8, four arc-shaped sliding grooves 10 annularly formed on the surface of the copper ring 8, and arc-shaped clips 11 fixedly connected to the inner wall of the arc-shaped sliding grooves 10.

[0018] The center section of the card block 5 is T-shaped, and the diameter of the card block 5 is the same as the distance between the inner walls of the arc-shaped groove 10.

[0019] The inner wall of the arc-shaped clip 11 matches the lower outer wall of the clip 5, and the clip 5 is engaged inside the arc-shaped clip 11.

[0020] The outer conical surface 7 and the inner conical surface 9 are in contact with each other, and the inclined surface of the outer conical surface 7 is set upward.

[0021] The cooling ring groove 2 is located at the lower end of the tungsten plate 6, and the opening of the cooling ring groove 2 is completely in contact with the lower surface of the tungsten plate 6.

[0022] In use, first, the connecting surfaces of the copper ring 1, tungsten plate 6, and copper ring 8 should be polished and cleaned to remove oxide layers, oil stains, and impurities, ensuring surface flatness and cleanliness. Specifically, the upper surface of the copper ring 1, the outer conical surface 7 of the tungsten plate 6, and the inner conical surface 9 of the copper ring 8 need to be polished to a roughness of Ra≤0.8μm. Place the tungsten plate 6 on the upper surface of the copper ring 1, ensuring that the lower surface of the tungsten plate 6 is completely flush with the opening of the cooling ring groove 2 on the copper ring 1, and that the tungsten plate 6 is centered with its axis aligned with the axis of the copper ring 1. Then, slip the copper ring 8 onto the upper end of the tungsten plate 6, aligning the inner conical surface 9 of the inner wall of the copper ring 8 with the outer conical surface 7 of the outer wall of the tungsten plate 6. Slowly slide the copper ring 8 downwards until the lower end of the copper ring 8 is flush with the copper ring 1. The upper surface of ring 1 contacts the copper ring 8. Rotate the copper ring 8 so that the four T-shaped locking blocks 5 on the copper ring 1 are respectively embedded into the four arc-shaped sliding grooves 10 on the copper ring 8. Continue to rotate the copper ring 8 by 15° until the locking blocks 5 slide into the arc-shaped clips 11 at the end of the arc-shaped sliding grooves 10. The copper ring 8 and the copper ring 1 are fixedly connected by the contact and limiting effect of the arc-shaped clips 11 and the lower end of the T-shaped locking blocks 5. At this time, the inner conical surface 9 and the outer conical surface 7 are tightly attached to form a conical self-locking structure, which completes the fixation of the tungsten plate 6. Then, the entire assembly is placed in a diffusion welding machine for diffusion welding. At this time, the tungsten plate 6 and the copper ring 8 are stably fixed on the upper end of the copper ring 1, avoiding the interface cross-linking defects caused by metal surface friction during the welding process.

[0023] A method for connecting a tungsten-copper composite component with internal cooling channels includes the following steps: S1: First, the upper surface of the copper ring 1, the outer conical surface 7 of the tungsten plate 6 and the inner conical surface 9 of the copper ring 8 are ground and polished to remove the surface oxide layer and impurities. After grinding, the surface roughness is controlled to Ra≤0.8μm. Then, ultrasonic cleaning technology is used to deeply clean the connecting surfaces of each component to remove microscopic residual impurities. After drying, it is ready for use. S2: Place the tungsten plate 6 on the upper surface of the copper ring 1, so that the lower surface of the tungsten plate 6 completely covers the opening of the cooling ring groove 2, and the axis of the tungsten plate 6 coincides with the axis of the copper ring 1 to ensure the accuracy of the connection interface. S3: Insert the copper ring 8 from the top of the tungsten plate 6, aligning the inner conical surface 9 of the inner wall of the copper ring 8 with the outer conical surface 7 of the outer wall of the tungsten plate 6. Slowly slide the copper ring 8 downwards until the lower end of the copper ring 8 contacts the upper surface of the copper ring 1. At this time, the arc-shaped groove 10 on the copper ring 8 corresponds one-to-one with the locking block 5 on the copper ring 1. S4: Rotate the copper ring 8 clockwise by 15° to make the locking block 5 slide along the arc-shaped groove 10 and lock into the arc-shaped clip 11. The arc-shaped clip 11 is in close contact with the outer wall of the locking block 5, thereby achieving mechanical fixation of the copper ring 8 and the copper ring 1, forming a pre-assembled whole. S5: Place the pre-assembled copper ring 1, tungsten plate 6, and copper ring 8 into the vacuum chamber of the diffusion welding machine, close the chamber, and evacuate to a vacuum level ≤ 5 × 10⁻⁶. -3Pa, to avoid oxidation of the metal surface during welding; S6: Start the diffusion welding machine to perform step heating. In the first stage, heat up to 600-700℃ at a rate of 5-8℃ / min and hold for 30-40min to achieve pre-release of interfacial stress. In the second stage, heat up to 950-1050℃ at a rate of 3-5℃ / min and hold for 60-90min. S7: After heating to the target temperature, apply an axial pressure of 8-12MPa. The pressure is kept uniform and stable. The pressure promotes the diffusion and penetration between copper and tungsten atoms to form a dense metallurgical bonding layer. During the welding process, the temperature and pressure closed-loop control system of the welding machine is used to monitor and adjust the welding parameters in real time to ensure the uniformity of interface diffusion. S8: After diffusion welding is completed, the furnace is cooled at a rate of 2-3℃ / min to below 300℃, and then naturally cooled to room temperature to avoid thermal stress caused by rapid cooling leading to interface cracking. S9: After cooling, remove the composite part and perform non-destructive testing on the welding interface to check for defects such as incomplete welding and cracks. Perform flow test on the cooling channel to ensure that the fixed pipe 3 and the cooling ring groove 2 are smoothly connected and without blockage.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tungsten-copper composite component with internal cooling channels, comprising a copper ring (1), characterized in that: The upper surface of the copper ring (1) is provided with a cooling ring groove (2), and two fixed tubes (3) are embedded at the bottom of the cooling ring groove (2). A snap ring (4) is fixedly connected to the lower end of the inner wall of the fixed tube (3). Four snap blocks (5) are fixedly connected to the upper surface of the copper ring (1). A tungsten plate (6) is snapped onto the upper surface of the copper ring (1). An outer conical surface (7) is provided on the outer wall of the tungsten plate (6). A copper ring (8) is snapped onto the outer wall of the tungsten plate (6). An inner conical surface (9) is provided on the inner wall of the copper ring (8). Four arc-shaped sliding grooves (10) are provided in a ring on the surface of the copper ring (8). An arc-shaped clip (11) is fixedly connected to the inner wall of the arc-shaped sliding grooves (10).

2. The tungsten-copper composite component with internal cooling channels according to claim 1, characterized in that: The center section of the card block (5) is T-shaped, and the diameter of the card block (5) is the same as the distance between the inner walls of the arc-shaped groove (10).

3. A tungsten-copper composite component with internal cooling channels according to claim 1, characterized in that: The inner wall of the arc-shaped clip (11) matches the lower outer wall of the clip (5), and the clip (5) is engaged inside the arc-shaped clip (11).

4. A tungsten-copper composite component with internal cooling channels according to claim 1, characterized in that: The outer conical surface (7) and the inner conical surface (9) are in contact with each other, and the inclined surface of the outer conical surface (7) is set upward.

5. A tungsten-copper composite component with internal cooling channels according to claim 1, characterized in that: The cooling ring groove (2) is located at the lower end of the tungsten plate (6), and the opening of the cooling ring groove (2) is completely in contact with the lower surface of the tungsten plate (6).

6. A method for connecting a tungsten-copper composite component with internal cooling channels as described in any one of claims 1-5, characterized in that: Includes the following steps: S1: First, the upper surface of the copper ring (1), the outer conical surface (7) of the tungsten plate (6) and the inner conical surface (9) of the copper ring (8) are polished to remove the surface oxide layer and impurities. After polishing, the surface roughness is controlled to Ra≤0.8μm. Then, ultrasonic cleaning technology is used to deeply clean the connecting surfaces of each component to remove microscopic residual impurities. After drying, it is ready for use. S2: Place the tungsten plate (6) on the upper surface of the copper ring (1) so that the lower surface of the tungsten plate (6) completely covers the opening of the cooling ring groove (2), and the axis of the tungsten plate (6) coincides with the axis of the copper ring (1) to ensure the accuracy of the connection interface. S3: Insert the copper ring (8) from the top of the tungsten plate (6) so that the inner conical surface (9) of the inner wall of the copper ring (8) is aligned with the outer conical surface (7) of the outer wall of the tungsten plate (6). Slowly slide the copper ring (8) downward until the lower end of the copper ring (8) contacts the upper surface of the copper ring (1). At this time, the arc-shaped groove (10) on the copper ring (8) corresponds one-to-one with the locking block (5) on the copper ring (1). S4: Rotate the copper ring (8) clockwise by 15° so that the block (5) slides along the arc-shaped groove (10) and is inserted into the arc-shaped clip (11). The arc-shaped clip (11) is in close contact with the outer wall of the block (5) to achieve mechanical fixation of the copper ring (8) and the copper ring (1) to form a pre-assembled whole. S5: Place the pre-assembled copper ring (1), tungsten plate (6), and copper ring (8) into the vacuum chamber of the diffusion welding machine, close the chamber, and evacuate to a vacuum level ≤ 5 × 10⁻⁶. -3 Pa, to avoid oxidation of the metal surface during welding; S6: Start the diffusion welding machine to perform step heating. In the first stage, heat up to 600-700℃ at a rate of 5-8℃ / min and hold for 30-40min to achieve pre-release of interfacial stress. In the second stage, heat up to 950-1050℃ at a rate of 3-5℃ / min and hold for 60-90min. S7: After heating to the target temperature, apply an axial pressure of 8-12MPa. The pressure is kept uniform and stable. The pressure promotes the diffusion and penetration between copper and tungsten atoms to form a dense metallurgical bonding layer. During the welding process, the temperature and pressure closed-loop control system of the welding machine is used to monitor and adjust the welding parameters in real time to ensure the uniformity of interface diffusion. S8: After diffusion welding is completed, the furnace is cooled at a rate of 2-3℃ / min to below 300℃, and then naturally cooled to room temperature to avoid thermal stress caused by rapid cooling leading to interface cracking. S9: After cooling, remove the composite part and perform non-destructive testing on the welding interface to check for defects such as incomplete welding and cracks. Perform flow test on the cooling channel to ensure that the fixed pipe (3) and the cooling ring groove (2) are connected smoothly and without blockage.

Images