Titanium-based composite material spherical powder processing device and processing method thereof

Abstract

The application provides a titanium-based composite material spherical powder processing device and a processing method thereof, and relates to the technical field of titanium-based composite material processing.The device comprises a medium-frequency smelting furnace, a tundish, a hollow copper roller and a powder collecting device.A plurality of protrusions are arranged above the hollow copper roller, the surfaces of the protrusions are provided with openings, and sealing structures are arranged on the two sides of the hollow copper roller.The hollow copper roller is connected with a motor.The titanium-based composite material is processed by using the processing device, and the sphericity and fluidity of the titanium-based composite material powder can be improved.

Description

Technical Field

[0001] This invention relates to the field of titanium-based composite material processing technology, and in particular to a titanium-based composite material spherical powder processing device and processing method. Background Technology

[0002] Due to its advantages such as low density, high strength, good corrosion resistance, and good biocompatibility, titanium and its alloys are widely used in aerospace, petrochemical, marine engineering, and medical and health care fields. To further improve Young's modulus, wear resistance, and high-temperature performance, titanium-based composite materials with titanium alloys as the matrix and ceramic phases as the reinforcing phase have been developed. Among these, titanium boride and titanium carbide are considered to be among the most promising high-temperature titanium-based composite materials due to their good compatibility with the titanium alloy matrix and their ability to be generated through in-situ reactions.

[0003] Currently, the processing method for titanium-based composite powder involves preparing titanium-based composite alloy ingots using an EB furnace or vacuum consumable arc remelting technology, followed by spheroidization and powdering via gas atomization or rotating electrode powdering technology. This processing method suffers from drawbacks such as complex operation, high cost, and low economic value. Therefore, a low-cost method for preparing titanium-based composite powder with good flowability is currently a research hotspot. Summary of the Invention

[0004] In view of this, the present invention provides a method for processing spherical powder of titanium-based composite materials. This invention achieves the melting, powdering, and spheroidizing processes in a one-step process, reducing complex processes such as vacuum melting, shortening the overall powder preparation process, saving labor and costs, and possessing good economic value.

[0005] This invention provides a titanium-based composite material spherical powder processing device, the device including a medium-frequency melting furnace 1, an intermediate ladle 2, a hollow copper roller 3, and a powder collecting device 4; the hollow copper roller 3 has several protrusions on its upper surface, the surface of the protrusions has openings, and the hollow copper roller has sealing structures on both sides; the hollow copper roller is connected to a motor.

[0006] This invention also provides a method for processing spherical powder of titanium-based composite materials, specifically using the processing apparatus described in this invention, comprising the following steps:

[0007] S1. Prepare titanium alloy matrix raw materials and second phase raw materials; the titanium alloy matrix raw materials are sponge titanium, titanium ingots or titanium alloy ingots; the second phase raw materials are at least one of titanium diboride powder, boron powder or graphite powder.

[0008] S2. The second phase raw material is pretreated, and the pretreatment method is as follows:

[0009] The second phase raw material is subjected to intermittent vibratory ball milling under an inert atmosphere. After ball milling and sieving, powder with a particle size range of ~10μm is obtained. Then, the obtained second phase raw material powder is loaded into the hollow copper roller 3, and finally, both ends of the hollow copper roller are sealed.

[0010] S3. The titanium alloy matrix raw material is placed inside the medium-frequency melting furnace 1 and vacuum melting is performed. The melting temperature is 1800℃~2000℃ to obtain titanium alloy melt.

[0011] S4. Pour the titanium alloy molten liquid into the intermediate ladle 2 and turn on the motor 6 at the same time. When the titanium alloy molten liquid comes into contact with the rotating copper roller, the liquid flow is broken up and some powder is wrapped by the scattered liquid droplets, which then solidify into spherical shapes under the action of surface tension.

[0012] S5. Collect the spherical powder using the powder collection device 4, and cool it naturally to room temperature to obtain titanium-based composite material spherical powder.

[0013] Preferably, the mesh size of the second phase raw material is -200 to -235 mesh.

[0014] Preferably, the ball-to-material ratio in step S2 of the ball milling process is 10:1.

[0015] Preferably, step S2 involves sealing both ends of the hollow copper roller with hexagonal screws.

[0016] Preferably, the intermediate package is made of yttrium oxide.

[0017] Preferably, the rotation speed of the copper roller in step S4 is 3000-5000 rpm.

[0018] Preferably, the powder collection device in step S5 is equipped with argon gas.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides a method for processing spherical powder of titanium-based composite materials. By improving the structure of the processing apparatus for spherical powder of titanium-based composite materials, this invention enables the production of titanium-based composite material powder with high flowability. This invention reduces the processing cost and difficulty of spherical powder of titanium-based composite materials, and has high economic value. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the titanium-based composite material spherical powder processing device of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments.

[0023] Example 1

[0024] A titanium-based composite material spherical powder processing device, such as Figure 1 As shown, the processing device includes a medium-frequency melting furnace 1, an intermediate ladle 2, a hollow copper roller 3, and a powder collecting device 4; several protrusions are provided on the top of the hollow copper roller 3, and openings are provided on the surface of the protrusions; sealing structures are provided on both sides of the hollow copper roller; a motor is connected to the hollow copper roller.

[0025] Example 2

[0026] A method for processing spherical powder of titanium-based composite material, specifically using the processing apparatus of Example 1, includes the following steps:

[0027] S1. Prepare titanium alloy matrix raw materials and second phase raw materials; the titanium alloy matrix raw materials are pure titanium ingots; the second phase raw materials are boron powder with a particle size of 220 mesh.

[0028] S2. The second phase raw material is pretreated, and the pretreatment method is as follows:

[0029] The second phase raw material is subjected to intermittent vibratory ball milling under nitrogen atmosphere protection (the ball-to-material ratio is 10:1). After ball milling and sieving, powder with a particle size range of ~10μm is obtained. Then, the obtained second phase raw material powder is loaded into the hollow copper roller 3, and finally, the two ends of the hollow copper roller 3 are sealed with hexagonal screws.

[0030] S3. Place the titanium alloy matrix raw material inside the medium-frequency melting furnace 1 and perform vacuum melting treatment at a melting temperature of 2000℃ to obtain titanium alloy melt.

[0031] S4. Pour the titanium alloy molten liquid into the intermediate ladle 2 (made of yttrium oxide) and turn on the motor 6 at the same time. When the titanium alloy molten liquid comes into contact with the rotating copper roller, the liquid flow is broken up and some powder is wrapped by the scattered liquid droplets. Under the action of surface tension, it condenses into a spherical shape. The rotation speed of the copper roller is 3000 rpm.

[0032] S5. Collect spherical powder using a powder collection device 4 equipped with argon gas, and allow it to cool naturally to room temperature to obtain spherical powder of titanium-based composite material.

[0033] Example 3

[0034] A method for processing spherical powder of titanium-based composite material, specifically using the processing apparatus of Example 1, includes the following steps:

[0035] S1. Prepare titanium alloy matrix raw materials and second phase raw materials; the titanium alloy matrix raw material is TC4 alloy ingot; the second phase raw material is graphite powder;

[0036] S2. The second phase raw material is pretreated, and the pretreatment method is as follows:

[0037] The second phase raw material is subjected to intermittent vibratory ball milling under nitrogen atmosphere protection (the ball-to-material ratio is 10:1). After ball milling and sieving, powder with a particle size range of ~10μm is obtained. Then, the obtained second phase raw material powder is loaded into the hollow copper roller 3, and finally, the two ends of the hollow copper roller 3 are sealed with hexagonal screws.

[0038] S3. Place the titanium alloy matrix raw material inside the medium-frequency melting furnace 1 and perform vacuum melting treatment at a melting temperature of 1900℃ to obtain titanium alloy melt.

[0039] S4. Pour the titanium alloy molten liquid into the intermediate ladle 2 (made of yttrium oxide) and turn on the motor 6 at the same time. When the titanium alloy molten liquid comes into contact with the rotating copper roller, the liquid flow is broken up and some powder is wrapped by the scattered liquid droplets. Under the action of surface tension, it condenses into a spherical shape. The rotation speed of the copper roller is 4000 rpm.

[0040] S5. Collect spherical powder using a powder collection device 4 equipped with argon gas, and allow it to cool naturally to room temperature to obtain spherical powder of titanium-based composite material.

[0041] This invention integrates the melting, powdering, and spheroidizing processes of titanium alloy composite spherical powder. The overall equipment is simple and easy to use. It can also further realize the preparation of spherical powders of various composite materials of any alloy, reducing production costs. This invention can achieve continuous operation of a single product in a high-purity argon atmosphere, improving production efficiency and shortening the production cycle.

[0042] This invention enables the production of spherical powders with different particle sizes by changing the rotation speed of the copper roller, which is simple and practical. This invention also enables the prepared powder to undergo in-situ reaction in subsequent sintering processes, making the second phase particles more tightly bonded to the matrix.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for processing spherical powder of titanium-based composite materials, characterized in that, The device includes a medium-frequency melting furnace (1), a tundish (2), a hollow copper roller (3), and a powder collection device (4); the hollow copper roller (3) has several protrusions on its upper surface, the protrusions have openings on their surfaces, and the hollow copper roller has sealing structures on both sides; the hollow copper roller is connected to a motor. The method for processing titanium-based composite material spherical powder using the aforementioned titanium-based composite material spherical powder processing apparatus includes the following steps: S1. Prepare titanium alloy matrix raw materials and second phase raw materials; the titanium alloy matrix raw materials are sponge titanium, titanium ingots or titanium alloy ingots; the second phase raw materials are at least one of titanium diboride powder, boron powder or graphite powder. S2. The second phase raw material is pretreated, and the pretreatment method is as follows: The second phase raw material was subjected to intermittent vibratory ball milling under an inert atmosphere. After ball milling and sieving, powder with a particle size range of 10 μm was obtained. Then, the obtained second phase raw material powder was loaded into the hollow copper roller (3), and finally, both ends of the hollow copper roller were sealed. S3. Place the titanium alloy matrix raw material inside the medium frequency melting furnace (1) and perform vacuum melting treatment. The melting temperature is 1800℃~2000℃ to obtain titanium alloy melt. S4. Pour the titanium alloy molten liquid into the intermediate ladle (2) and turn on the motor (6). When the titanium alloy molten liquid comes into contact with the rotating copper roller, the liquid flow is broken, and some powder is wrapped by the scattered liquid droplets and condenses into spheres under the action of surface tension. S5. Collect spherical powder using the powder collection device (4), and cool it naturally to room temperature to obtain titanium-based composite spherical powder.

2. A method for processing spherical powder of titanium-based composite materials, characterized in that, Processing using the processing apparatus of claim 1 includes the following steps: S1. Prepare titanium alloy matrix raw materials and second phase raw materials; the titanium alloy matrix raw materials are sponge titanium, titanium ingots or titanium alloy ingots; the second phase raw materials are at least one of titanium diboride powder, boron powder or graphite powder. S2. The second phase raw material is pretreated, and the pretreatment method is as follows: The second phase raw material was subjected to intermittent vibratory ball milling under an inert atmosphere. After ball milling and sieving, powder with a particle size range of 10 μm was obtained. Then, the obtained second phase raw material powder was loaded into the hollow copper roller (3), and finally, both ends of the hollow copper roller were sealed. S3. Place the titanium alloy matrix raw material inside the medium frequency melting furnace (1) and perform vacuum melting treatment. The melting temperature is 1800℃~2000℃ to obtain titanium alloy melt. S4. Pour the titanium alloy molten liquid into the intermediate ladle (2) and turn on the motor (6). When the titanium alloy molten liquid comes into contact with the rotating copper roller, the liquid flow is broken, and some powder is wrapped by the scattered liquid droplets and condenses into spheres under the action of surface tension. S5. Collect spherical powder using the powder collection device (4), and cool it naturally to room temperature to obtain titanium-based composite spherical powder.

3. The processing method as described in claim 2, characterized in that, The mesh size of the second phase raw material is -200 to -235 mesh.

4. The processing method as described in claim 2, characterized in that, The ball-to-material ratio for ball milling in step S2 is 10:

1.

5. The processing method as described in claim 2, characterized in that, Step S2 involves sealing both ends of the hollow copper roller using hex socket screws.

6. The processing method as described in claim 2, characterized in that, The intermediate package is made of yttrium oxide.

7. The processing method as described in claim 2, characterized in that, In step S4, the rotation speed of the copper roller is 3000~5000 rpm.

8. The processing method as described in claim 2, characterized in that, Argon gas is installed inside the powder collection device in step S5.

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