An apparatus for constructing a multilayer annular bulk material from a plurality of solid metal

Abstract

The application is a device for building multilayer annular block material from multiple solid metals, which comprises a rotating frame (1) capable of rotating around a central axis, the rotating frame (1) being a hollow cylinder, a cylindrical heat treatment column (2) being arranged at the axial position in the inner cavity of the rotating frame (1), two powder feeding pipes (3) being symmetrically arranged around the heat treatment column (2), the powder feeding pipes (3) being capable of rotating and moving up and down along the central axis of the rotating frame (1), in the use process, titanium-aluminum alloy powder particles are plastically deformed on the surface of a titanium metal ring, and the combination with the titanium metal ring base material is completed with the aid of a tangential force.

Description

Technical Field

[0001] This invention relates to a device for constructing multilayer ring-shaped bulk materials using various solid metals, and pertains to the field of ring-shaped bulk material processing and manufacturing technology. Background Technology

[0002] Multilayer ring-shaped bulk materials are widely used in aerospace, aviation, and medical fields. They can typically be easily fabricated using 3D printing or laser cladding. However, these methods involve the accumulation of material without plastic deformation, leading to some defects in the material's properties. While coating techniques can also produce multilayer ring-shaped bulk materials, the pretreatment process is cumbersome, and the thickness of a single coating layer is limited, hindering the widespread application of large-scale multilayer ring-shaped bulk materials. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention provides a device for constructing multilayer ring-shaped bulk materials using various solid metals. The purpose of this device is to enable titanium-aluminum alloy powder particles to undergo plastic deformation on the surface of a titanium metal ring and, with the assistance of tangential force, to bond with the titanium metal ring substrate material.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] The apparatus for constructing multilayer ring-shaped bulk materials using various solid metals includes a rotating frame 1 capable of rotating along a central axis. The rotating frame 1 is a hollow cylinder. A cylindrical heat treatment column 2 is positioned at the central axis of the inner cavity of the rotating frame 1. Two powder conveying pipes 3 are symmetrically arranged around the heat treatment column 2. The powder conveying pipes 3 are capable of rotating and moving up and down along the central axis of the rotating frame 1. The steps for preparing multilayer ring-shaped bulk materials using the above apparatus include:

[0006] After cleaning the surface of a circular titanium metal ring 4, it is passed through the heat treatment column 2 and placed flat at the bottom of the cavity of the rotating frame 1.

[0007] b. Place the titanium-aluminum alloy powder into the powder conveying pipe 3. At this time, start the heat treatment column 2 to heat the titanium metal ring 4 and the titanium-aluminum alloy powder. The heating temperature is below the melting point temperature of the titanium metal ring 4 and the titanium-aluminum alloy powder, which is 30-40% of the melting point temperature of the titanium metal ring 4 and the titanium-aluminum alloy powder. After heat treatment, the rotating frame 1 drives the titanium metal ring 4 to start rotating at a speed of 5-30 rad / min. The powder conveying pipe 3 also starts to rotate at a speed of 50-100 rad / min. While rotating, the powder conveying pipe 3 begins to move slowly downward. When the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 reaches 1 / 4 to 1 / 2 of the titanium-aluminum alloy powder... When the alloy powder particle size is reached, stop moving and open the bottom opening of the powder conveying pipe 3 to allow the titanium-aluminum alloy powder to fall onto the upper surface of the titanium metal ring 4. Then, within the same time period, rotate the rotating frame 1 by 100-300 rad and the powder conveying pipe 3 by 500-1000 rad. After that, move the powder conveying pipe 3 upward, increasing the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 by one titanium-aluminum alloy powder particle size. Continue to maintain the same number of rotations of the rotating frame 1 and the powder conveying pipe 3 within the same time period. In this way, the powder conveying pipe 3 moves upward by one titanium-aluminum alloy powder particle size each time. After repeated cycles, the forming of the multi-layer ring-shaped metal block material is completed.

[0008] In practice, the wall thickness of the rotating frame 1 is 10-20mm.

[0009] In practice, the wall thickness of the powder conveying pipe 3 is 5-10 mm.

[0010] In practice, both the rotating frame 1 and the powder conveying pipe 3 are made of wear-resistant structural steel.

[0011] In practice, the titanium metal ring 4 and the heat-treated column 2 are in a transition fit.

[0012] During implementation, in step a, the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 is greater than 5 mm.

[0013] In practice, in step b, the particle size of the titanium-aluminum alloy powder is 200-400 mesh.

[0014] During implementation, after step b is completed, the heat treatment column 2 stops heating, the rotating frame 1 and the powder conveying pipe 3) stop rotating, and after the multi-layer annular metal block material cools to room temperature, it is taken out for sandblasting and cleaning.

[0015] The features and beneficial effects of the technical solution of this invention are as follows:

[0016] I. The present invention differs from traditional metal 3D printing technology in that it is a solid-state process that occurs at temperatures below the melting point. The powder delivery tube spreads the powder evenly onto the substrate; that is, when the powder comes into contact with the substrate through a rotating tool, it begins to adhere to the substrate through friction, undergoing plastic deformation but not melting.

[0017] Second, the rapid rotation process heats the material, giving it sufficient ductility to undergo significant plastic deformation. Once the first layer is applied, more layers can be built simply by lifting and pushing the powder delivery tube until the entire component is complete.

[0018] Third, since the distance between the lower surface of the powder conveying pipe and the titanium alloy ring is smaller than the particle size of the titanium aluminum alloy powder, the titanium aluminum alloy powder undergoes plastic deformation when it falls onto the upper surface of the titanium alloy ring. Under the action of friction (provided by the difference in the rotation direction and rotation speed of the two), a temperature rise is generated, which facilitates instantaneous bonding in a low-temperature environment.

[0019] Fourth, compared with traditional 3D printing, this technology has lower residual stress and is less affected by problems such as porosity and thermal cracking. This process can achieve the joining of different metals, including aluminum, titanium, steel, and nickel-based high-temperature alloys. Attached Figure Description

[0020] Figure 1 Schematic diagram of a device for constructing multilayer toroidal bulk materials for various solid metals Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0022] See appendix Figure 1 As shown, the device for constructing multi-layer ring-shaped bulk materials using various solid metals in this embodiment includes a rotating frame 1 that can rotate along its central axis. The rotating frame 1 is a hollow cylinder with a wall thickness of 10-20 mm. A cylindrical heat treatment column 2 is arranged at the central axis of the inner cavity of the rotating frame 1. Two powder conveying pipes 3 are symmetrically arranged around the heat treatment column 2. The powder conveying pipes 3 have a wall thickness of 5-10 mm and can rotate and move up and down along the central axis of the rotating frame 1. Both the rotating frame 1 and the powder conveying pipes 3 are made of wear-resistant structural steel.

[0023] The steps for preparing multilayer ring-shaped bulk materials using the above-described apparatus are as follows:

[0024] Step 1: After preparing the device according to the above structure, clean the surface of a circular titanium metal ring 4, pass it through the heat treatment column 2, and place it flat at the bottom of the cavity of the rotating frame 1. The titanium metal ring 4 and the heat treatment column 2 are in transition fit. At this time, the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 is greater than 5mm.

[0025] Step 2: Place the titanium-aluminum alloy powder into the powder conveying pipe 3. The particle size of the titanium-aluminum alloy powder is 200-400 mesh. At this time, start the heat treatment column 2 to heat the titanium metal ring 4 and the titanium-aluminum alloy powder. The heating temperature is below the melting point temperature of the titanium metal ring 4 and the titanium-aluminum alloy powder, which is 30-40% of the melting point temperature. After heat treatment, the rotating frame 1 drives the titanium metal ring 4 to start rotating at a speed of 5-30 rad / min. The powder conveying pipe 3 also starts to rotate at a speed of 50-100 rad / min. While rotating, the powder conveying pipe 3 begins to move slowly downward. When the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 reaches 1 / 4 to 1 / 2 of the titanium-aluminum alloy powder particle size, stop moving and start cleaning. The bottom opening of the powder conveying pipe 3 is opened, allowing titanium-aluminum alloy powder to fall onto the upper surface of the titanium metal ring 4. Then, within the same time period, the rotating frame 1 rotates 100-300 rad, and the powder conveying pipe 3 rotates 500-1000 rad. During the above movement, the titanium-aluminum alloy powder undergoes plastic deformation on the upper surface of the titanium alloy ring 4, and a temperature rise is generated under the action of friction. Afterward, the powder conveying pipe 3 moves upward, increasing the gap between the bottom of the powder conveying pipe 3 and the upper surface of the titanium metal ring 4 by one titanium-aluminum alloy powder particle size. The rotation of the rotating frame 1 and the powder conveying pipe 3 is maintained at the same number of rotations within the same time period. This process is repeated, with the powder conveying pipe 3 moving upward a distance of one titanium-aluminum alloy powder particle size each time. After multiple repetitions, the multi-layer ring-shaped metal block material is formed.

[0026] Step 3: After Step 2 is completed, the heat treatment column 2 stops heating, the rotating frame 1 and the powder conveying pipe 3 stop rotating, and after the multi-layer annular metal block material cools to room temperature, it is taken out for sandblasting and cleaning.

Claims

1. A device for constructing multilayer ring-shaped bulk materials from multiple solid metals, characterized in that, The device includes a rotating frame (1) capable of rotating along a central axis. The rotating frame (1) is a hollow cylinder. A cylindrical heat treatment column (2) is arranged at the central axis of the inner cavity of the rotating frame (1). Two powder conveying pipes (3) are symmetrically arranged around the heat treatment column (2). The powder conveying pipes (3) are capable of rotating and moving up and down along the central axis of the rotating frame (1). The steps for preparing multilayer annular bulk material using the above device include: After cleaning the surface of a circular titanium metal ring (4), it is passed through the heat treatment column (2) and placed flat at the bottom of the cavity of the rotating frame (1); b. Place the titanium-aluminum alloy powder into the powder conveying pipe (3). At this time, start the heat treatment column (2) to heat the titanium metal ring (4) and the titanium-aluminum alloy powder. The heating temperature is below the melting point temperature of the titanium metal ring (4) and the titanium-aluminum alloy powder, which is 30-40% of the melting point temperature of the titanium metal ring (4) and the titanium-aluminum alloy powder. After heat treatment, the rotating frame (1) drives the titanium metal ring (4) to start rotating. The rotation speed is 5~30 rad / min. The powder conveying pipe (3) also starts to rotate at the same time. The rotation speed is 50-100 rad / min. While rotating, the powder conveying pipe (3) begins to move slowly downward. When the gap between the bottom of the powder conveying pipe (3) and the upper surface of the titanium metal ring (4) reaches 1 / 4 to 1 / 2 of the titanium-aluminum alloy powder, the powder is heated to a certain extent. When the alloy powder particle size is reached, stop moving and open the bottom opening of the powder conveying pipe (3) so that the titanium-aluminum alloy powder falls onto the upper surface of the titanium metal ring (4). Then, within the same time period, make the rotating frame (1) rotate 100~300 rad and the powder conveying pipe (3) rotate 500~1000 rad. After that, the powder conveying pipe (3) moves upward so that the gap between the bottom of the powder conveying pipe (3) and the upper surface of the titanium metal ring (4) increases by 1 titanium-aluminum alloy powder particle size. Continue to maintain the same number of rotations of the rotating frame (1) and the powder conveying pipe (3) within the same time period. In this way, the powder conveying pipe (3) moves upward each time by a distance of 1 titanium-aluminum alloy powder particle size. After multiple repetitions, the forming of the multi-layer ring metal block material is completed.

2. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, The wall thickness of the rotating frame (1) is 10-20mm.

3. The apparatus for constructing multilayer ring-shaped bulk materials using various solid metals according to claim 1, characterized in that, The wall thickness of the powder conveying pipe (3) is 5-10 mm.

4. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, Both the rotating frame (1) and the powder conveying pipe (3) are made of wear-resistant structural steel.

5. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, The titanium metal ring (4) and the heat-treated column (2) are in a transition fit.

6. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, In step a, the gap between the bottom of the powder conveying pipe (3) and the upper surface of the titanium metal ring (4) is greater than 5 mm.

7. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, In step b, the particle size of the titanium-aluminum alloy powder is 200-400 mesh.

8. The apparatus for constructing multilayer ring-shaped bulk materials from various solid metals according to claim 1, characterized in that, After step b is completed, the heat treatment column (2) stops heating, the rotating frame (1) and the powder conveying pipe (3) stop rotating, and after the multi-layer annular metal block material cools to room temperature, it is taken out for sandblasting and cleaning.

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