High-fluidity titanium alloy powder and preparation method thereof

Abstract

The invention relates to the technical field of alloy powder preparation, in particular to high-fluidity titanium alloy powder and a preparation method thereof.The preparation method comprises the steps that after shielding gas is introduced, titanium alloy wires are fed into a plasma generator to be subjected to vaporization smelting, then screening is conducted, and titanium alloy powder is obtained; adding a synergist and a flow promoter, and uniformly stirring to finally obtain the high-flowability titanium alloy powder. By adding the flow promoter, a layer of stable nanoscale passive film can be generated on the surface of the titanium alloy powder, so that the flowability of the titanium alloy powder is improved, meanwhile, the possibility that the titanium alloy powder adsorbs interstitial elements such as oxygen and nitrogen in the environment is reduced, and the purity is higher; the synergist can react with the passive film when the high-fluidity titanium alloy powder is subjected to high-temperature treatment, the plasticity of the high-fluidity titanium alloy powder and the fracture toughness of a prepared device are improved, and therefore the titanium alloy powder has higher stability, fluidity and application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy powder preparation, and particularly relates to a high-fluidity titanium alloy powder and a preparation method thereof. Background Art

[0002] Titanium and titanium alloys are materials very suitable for aviation and aerospace because their specific gravity is only about 4.5, which is almost 1 / 2 compared to the common steel alloys with a specific gravity of over 7.8. Moreover, titanium and titanium alloys have high strength, and their strength-to-weight ratio far exceeds that of light aluminum and aluminum alloys, especially in terms of temperature resistance and acid and alkali resistance. However, low-oxygen titanium powder needs to be strictly controlled in various environments such as preparation and storage, so that the low-oxygen titanium powder is always in an inert gas or vacuum atmosphere to avoid powder passivation, which greatly increases the costs in aspects such as the use and storage of low-oxygen titanium powder. At the same time, the powder produced by this method has a large surface activity. After being exposed to air, it will be quickly passivated, forming a dense passivation film and adsorbing a large amount of gas impurities, deteriorating the powder properties and the fluidity of spherical powder.

[0003] At the same time, titanium alloy is an alloy with very high activity. To obtain high-purity titanium alloy powder with low impurity content, it is necessary to ensure that the environment is always under high-purity inert gas protection or high-vacuum environment during the preparation process to avoid the pollution of titanium alloy. The titanium alloy powder produced by gas atomization has a large surface activity. Especially when the particle size of the prepared powder is below 100 microns, the powder shows a fluffy and agglomerated characteristic, with very poor fluidity, causing great difficulties for the subsequent screening of the powder. On the other hand, fine titanium alloy powder has a very high activity. When it quickly contacts air, its surface is rapidly oxidized and a large amount of heat is released, posing a great potential safety hazard.

[0004] Therefore, in the preparation process of titanium alloy powder, it is particularly important to reduce the surface tension after surface passivation treatment of titanium alloy powder while having few surface impurities, high stability and high fluidity without affecting the chemical composition of the titanium alloy powder itself.

[0005] Therefore, according to the above related technologies, it is urgent to develop a high-fluidity titanium alloy powder and a preparation method thereof. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a high-fluidity titanium alloy powder and a preparation method thereof to solve the problem that the stability and fluidity of the titanium alloy powder prepared in the prior art are relatively poor.

[0007] Based on the above purpose, the present invention provides a high-fluidity titanium alloy powder and a preparation method thereof.

[0008] A preparation method of a high-fluidity titanium alloy powder includes the following steps:

[0009] Step S1: After introducing the protective gas, feed the titanium alloy wire into the plasma generator for vaporization melting to form fine spherical titanium alloy powder, and then screen it under a protective atmosphere to obtain the titanium alloy powder;

[0010] Step S2: Spray the flow aid onto the surface of the titanium alloy powder, stir evenly, then spray the synergist and stir evenly to obtain the titanium alloy powder with high fluidity;

[0011] The particle size of the synergist is 21 - 30μm;

[0012] The synergist is prepared from PdCl 3 and PtCl 2 ;

[0013] The particle size of the flow aid is 21 - 30μm;

[0014] The flow aid is any one of metal chlorides and halogenated hydrocarbon organic compounds.

[0015] Preferably, the flow rate of the protective gas in Step S1 is 1 - 6 slpm;

[0016] The feeding rate of the titanium alloy wire in Step S1 is 10 - 600 g / min;

[0017] In Step S1, the power of the plasma generator is 15 - 200 KW, the pressure is 103.4 - 130.9 Kpa, the central gas flow rate is 8 - 100 slpm, the auxiliary gas flow rate is 25 - 100 slpm, the argon gas flow rate is 30 - 300 slpm, and the hydrogen gas flow rate is 2 - 80 slpm.

[0018] Preferably, the diameter of the titanium alloy wire is 0.1 - 10 mm.

[0019] Preferably, the titanium alloy wire in Step S1 is any one of α-type titanium alloy, α + β-type titanium alloy, and TiAl-type titanium alloy.

[0020] Preferably, the central gas in Step S1 is argon;

[0021] The auxiliary gas in Step S1 is argon;

[0022] The protective gas in Step S1 is argon.

[0023] Preferably, the particle size of the titanium alloy powder in Step S1 is 21 - 30μm;

[0024] The thickness of the passivation layer on the surface of the high-fluidity titanium alloy powder in Step S1 is 1 - 7 nm.

[0025] Preferably, the metal chloride is TiCl4 , SnCl 4 Any one of;

[0026] The halogenated hydrocarbon organic compound is CHCl 3 , CH 2 Cl 2 , C 2 HCl 3 , C 2 Cl 4 , CCl 4 Any one of.

[0027] Preferably, the preparation method of the synergist is as follows:

[0028] Mix PdCl 3 and PtCl 2 uniformly to obtain the synergist.

[0029] Preferably, the mass ratio of PdCl 3 to PtCl 2 is 0.005 - 0.01: 0.005 - 0.02.

[0030] Preferably, the mass ratio of the flow aid, synergist, and titanium alloy powder in step S2 is 0.01 - 1: 0.01 - 0.03: 100.

[0031] Advantages of the present invention:

[0032] The present invention provides a high - fluidity titanium alloy powder and its preparation method. The preparation method of the present invention is as follows: After introducing a protective gas, feed the titanium alloy wire into the plasma generator for vaporization melting, and then perform sieving to obtain the titanium alloy powder; add a synergist and a flow aid and stir evenly to finally obtain the high - fluidity titanium alloy powder; the addition of the flow aid can generate a stable nanoscale passivation film on the surface of the titanium alloy powder, thereby improving the fluidity of the titanium alloy powder and at the same time reducing the possibility of the titanium alloy powder adsorbing interstitial elements such as oxygen and nitrogen in the environment, making the purity higher; the synergist can react with the passivation film when the high - fluidity titanium alloy powder is heat - treated, improving the plasticity of the high - fluidity titanium alloy powder and the fracture toughness of the prepared device. Therefore, compared with the prior art, the titanium alloy powder prepared by the present invention has higher stability, fluidity, and application prospects. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 State diagram of the high-flowability titanium alloy powder prepared in the inventive preparation example;

[0035] Figure 2 State diagram of the high-flowability titanium alloy powder prepared in Comparative Example 10 of the present invention. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0037] Example 1: A preparation method of a high-flowability titanium alloy powder:

[0038] S1: Introduce central gas, argon and hydrogen into the plasma generator, start the high-frequency power supply and excite the plasma, and then introduce auxiliary gas, and gradually adjust the system pressure, power and various gas flow rates to the predetermined values; among them, both the central gas and the auxiliary gas are argon; the predetermined value of the power of the plasma generator is 15 KW, the predetermined value of the pressure is 103.4 Kpa, the predetermined value of the central gas flow rate is 8 slpm, the predetermined value of the auxiliary gas flow rate is 25 slpm, the predetermined value of the argon flow rate is 30 slpm, and the predetermined value of the hydrogen flow rate is 2 slpm;

[0039] S2: After introducing argon with a flow rate of 1 slpm, feed TA1 type titanium alloy wire with a diameter of 0.1 - 10 mm into the plasma generator at a rate of 10 g / min for vaporization and melting to form fine spherical titanium alloy powder, and then perform sieving in a nitrogen atmosphere to obtain titanium alloy powder with a particle size of 21 - 30 μm;

[0040] S3: Mix 0.005 g of PdCl with a particle size of 21 - 30 μm 3 and 0.005 g of PtCl with a particle size of 21 - 30 μm 2 uniformly to obtain a synergist;

[0041] S4: Spray 0.01 g of TiCl with a particle size of 21 - 30 μm 4 onto the surface of 100 g of titanium alloy powder, stir evenly, then spray 0.01 g of the synergist with a particle size of 21 - 30 μm and stir evenly to obtain a high-flowability titanium alloy powder with a surface passivation layer thickness of 1 - 7 nm;

[0042] Example 2: A preparation method of a high-flowability titanium alloy powder:

[0043] S1: Introduce central gas, argon, and hydrogen into the plasma generator. Start the high-frequency power supply to excite the plasma, and then introduce auxiliary gas. Gradually adjust the system pressure, power, and the flow rates of various gases to the predetermined values. Among them, both the central gas and the auxiliary gas are argon. The predetermined power value of the plasma generator is 60 KW, the predetermined pressure value is 110.2 Kpa, the predetermined central gas flow rate value is 25 slpm, the predetermined auxiliary gas flow rate value is 45 slpm, the predetermined argon flow rate value is 75 slpm, and the predetermined hydrogen flow rate value is 6 slpm;

[0044] S2: After introducing argon with a flow rate of 3 slpm, feed TA3 type titanium alloy wire with a diameter of 0.1 - 10 mm into the plasma generator at a rate of 100 g / min for vaporization and melting to form fine spherical titanium alloy powder. Then, perform sieving under a nitrogen atmosphere to obtain titanium alloy powder with a particle size of 21 - 30 μm;

[0045] S3: Mix 0.007 g of PdCl with a particle size of 21 - 30 μm 3 and 0.01 g of PtCl with a particle size of 21 - 30 μm 2 uniformly to obtain a synergist;

[0046] S4: Spray 0.03 g of SnCl with a particle size of 21 - 30 μm 4 onto the surface of 100 g of titanium alloy powder, stir evenly, then spray 0.017 g of the synergist with a particle size of 21 - 30 μm and stir evenly to obtain high-fluidity titanium alloy powder with a surface passivation layer thickness of 1 - 7 nm;

[0047] Example 3: A method for preparing high-fluidity titanium alloy powder:

[0048] S1: Introduce central gas, argon, and hydrogen into the plasma generator. Start the high-frequency power supply to excite the plasma, and then introduce auxiliary gas. Gradually adjust the system pressure, power, and the flow rates of various gases to the predetermined values. Among them, both the central gas and the auxiliary gas are argon. The predetermined power value of the plasma generator is 60 KW, the predetermined pressure value is 110.2 Kpa, the predetermined central gas flow rate value is 25 slpm, the predetermined auxiliary gas flow rate value is 45 slpm, the predetermined argon flow rate value is 75 slpm, and the predetermined hydrogen flow rate value is 6 slpm;

[0049] S2: After introducing argon with a flow rate of 4 slpm, feed TC4 type titanium alloy wire with a diameter of 0.1 - 10 mm into the plasma generator at a rate of 300 g / min for vaporization and melting to form fine spherical titanium alloy powder. Then, perform sieving under an argon atmosphere to obtain titanium alloy powder with a particle size of 21 - 30 μm;

[0050] S3: Mix 0.008 g of PdCl with a particle size of 21 - 30 μm 3 and 0.015 g of PtCl with a particle size of 21 - 30 μm 2 evenly to obtain a synergist;

[0051] S4: Spray 0.6 g of CHCl with a particle size of 21 - 30 μm 3 onto the surface of 100 g of titanium alloy powder, stir evenly, then spray 0.23 g of the synergist with a particle size of 21 - 30 μm and stir evenly to obtain high - fluidity titanium alloy powder with a surface passivation layer thickness of 1 - 7 nm;

[0052] Example 4: A method for preparing high - fluidity titanium alloy powder:

[0053] S1: Introduce central gas, argon, and hydrogen into the plasma generator, start the high - frequency power supply to excite the plasma, and then introduce auxiliary gas. Gradually adjust the system pressure, power, and various gas flow rates to the predetermined values; among them, both the central gas and the auxiliary gas are argon; the predetermined value of the power of the plasma generator is 200 KW, the predetermined value of the pressure is 130.9 Kpa, the predetermined value of the central gas flow rate is 100 slpm, the predetermined value of the auxiliary gas flow rate is 100 slpm, the predetermined value of the argon flow rate is 300 slpm, and the predetermined value of the hydrogen flow rate is 80 slpm;

[0054] S2: After introducing argon with a flow rate of 6 slpm, feed TiAl - type titanium alloy wire with a diameter of 0.1 - 10 mm into the plasma generator at a rate of 600 g / min for vaporization and melting to form fine spherical titanium alloy powder, and then perform sieving in an argon atmosphere to obtain titanium alloy powder with a particle size of 21 - 30 μm;

[0055] S3: Mix 0.01 g of PdCl with a particle size of 21 - 30 μm 3 and 0.02 g of PtCl with a particle size of 21 - 30 μm 2 evenly to obtain a synergist;

[0056] S4: Spray 1 g of C 2 HCl 3 onto the surface of 100 g of titanium alloy powder, stir evenly, then spray 0.03 g of the synergist with a particle size of 21 - 30 μm and stir evenly to obtain high - fluidity titanium alloy powder with a surface passivation layer thickness of 1 - 7 nm;

[0057] Example 5: A method for preparing high - fluidity titanium alloy powder:

[0058] S1: Introduce central gas, argon, and hydrogen into the plasma generator, start the high-frequency power supply to excite the plasma, and then introduce auxiliary gas. Gradually adjust the system pressure, power, and the flow rates of various gases to the predetermined values; among them, both the central gas and the auxiliary gas are argon; the predetermined value of the power of the plasma generator is 200 KW, the predetermined value of the pressure is 130.9 Kpa, the predetermined value of the central gas flow rate is 100 slpm, the predetermined value of the auxiliary gas flow rate is 100 slpm, the predetermined value of the argon flow rate is 300 slpm, and the predetermined value of the hydrogen flow rate is 80 slpm;

[0059] S2: After introducing argon with a flow rate of 6 slpm, feed TC11 type titanium alloy wire with a diameter of 0.1 - 10 mm into the plasma generator at a rate of 10 - 600 g / min for vaporization and melting to form fine spherical titanium alloy powder. Then, perform sieving under an argon atmosphere to obtain titanium alloy powder with a particle size of 21 - 30 μm;

[0060] S4: Mix 0.01 g of PdCl with a particle size of 21 - 30 μm 3 and 0.02 g of PtCl with a particle size of 21 - 30 μm 2 uniformly to obtain a synergist;

[0061] S5: Spray 1 g of CCl with a particle size of 21 - 30 μm 4 onto the surface of 100 g of titanium alloy powder, stir evenly, then spray 0.03 g of the synergist with a particle size of 21 - 30 μm and stir evenly to obtain high-fluidity titanium alloy powder with a surface passivation layer thickness of 1 - 7 nm;

[0062] Comparative Example 1:

[0063] In this comparative example, compared with Example 1, the fine spherical titanium alloy powder was not sieved during the preparation process of the titanium alloy powder, and the remaining steps and parameters were the same. This comparative example will not be repeated here, and finally high-fluidity titanium alloy powder was obtained;

[0064] Comparative Example 2:

[0065] In this comparative example, compared with Example 1, PdCl was not added during the preparation process of the synergist 3 , and the remaining steps and parameters were the same. This comparative example will not be repeated here, and finally high-fluidity titanium alloy powder was obtained;

[0066] Comparative Example 3:

[0067] In this comparative example, compared with Example 1, the synergist was not added during the preparation process of the high-fluidity titanium alloy powder, and the remaining steps and parameters were the same. This comparative example will not be repeated here, and finally high-fluidity titanium alloy powder was obtained;

[0068] Comparative Example 4:

[0069] In this comparative example, compared with Example 1, no flow aid (TiCl 4 ) was added during the preparation of the high-fluidity titanium alloy powder. The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0070] Comparative Example 5:

[0071] In this comparative example, compared with Example 1, only the "synergist with a particle size of 21 - 30 μm" was replaced with a "synergist with a particle size of 50 - 61 μm". The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0072] Comparative Example 6:

[0073] In this comparative example, compared with Example 1, only the "synergist with a particle size of 21 - 30 μm" was replaced with a "synergist with a particle size of 13 - 15 μm". The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0074] Comparative Example 7:

[0075] In this comparative example, compared with Example 1, only the "flow aid (TiCl 4 ) with a particle size of 21 - 30 μm" was replaced with a "flow aid (TiCl 4 ) with a particle size of 50 - 61 μm". The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0076] Comparative Example 8:

[0077] In this comparative example, compared with Example 1, only the "flow aid (TiCl 4 ) with a particle size of 21 - 30 μm" was replaced with a "flow aid (TiCl 4 ) with a particle size of 13 - 15 μm". The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0078] Comparative Example 9:

[0079] In this comparative example, compared with Example 1, no synergist and flow aid (TiCl 4 ) were added during the preparation of the titanium alloy powder. The remaining steps and parameters were the same, and this comparative example will not be repeated here. Finally, high-fluidity titanium alloy powder was obtained;

[0080] Performance test:

[0081] Determination of stability:

[0082] Referring to the determination standard of GB / T1480 - 2012 "Determination of Particle Size of Metal Powders by Dry Sieving Method", 100 g of high - fluidity titanium alloy powder was sieved step by step with sieves of different pore sizes. After sieving, the powder on each sieve surface and the chassis was weighed (weighing accurate to 0.1 g). Then, the proportion of titanium alloy powder with a particle size between 21 - 30 μm was calculated. According to this method, the proportion (%) of high - fluidity titanium alloy powder with a particle size between 21 - 30 μm in the high - fluidity titanium alloy powder just prepared in Examples 1 - 5 and Comparative Examples 1 - 10 and the titanium alloy powder stored in a non - airtight environment for 100 days after preparation was determined. Then, the stability (%) of the high - fluidity titanium alloy powder was calculated according to the following formula;

[0083] The stability calculation formula is: Stability (%) = W 0 -W 1

[0084] where, W 0 is the proportion (%) of high - fluidity titanium alloy powder with a particle size between 21 - 30 μm in the high - fluidity titanium alloy powder just prepared; W 1 is the proportion (%) of high - fluidity titanium alloy powder with a particle size between 21 - 30 μm in the high - fluidity titanium alloy powder stored in a non - airtight environment for 100 days after preparation;

[0085] Determination of fluidity:

[0086] Referring to the determination standard of GB / T1482 - 2022 "Determination of Fluidity of Metal Powders - Standard Funnel Method (Hall Flowmeter)", the fluidity (s·50 g -1 ) of 50 g of high - fluidity titanium alloy powder just prepared in Examples 1 - 5 and Comparative Examples 1 - 10 and 50 g of high - fluidity titanium alloy powder stored in a non - airtight environment for 100 days after preparation was determined with a Hall flowmeter; The determination results are shown in Table 1;

[0087] Determination of oxygen content:

[0088] Referring to the test standard of GB / T5158.4 - 2001 "Determination of Total Oxygen Content in Metal Powders - Reduction - Extraction Method", the oxygen content (ppm) of 50 g of high - fluidity titanium alloy powder just prepared in Examples 1 - 5 and Comparative Examples 1 - 10 and 50 g of high - fluidity titanium alloy powder stored in a non - airtight environment for 100 days after preparation was determined; The determination results are shown in Table 1;

[0089] Determination of apparent density:

[0090] According to the measurement standard of GB / T 1479.1-2011 "Determination of apparent density of metallic powders - Part 1: Funnel method", the apparent density (g·cm -3 ) of 50 g of high-flowability titanium alloy powders prepared in Examples 1 - 5 and Comparative Examples 1 - 10 was measured; the measurement results are shown in Table 1;

[0091] Measurement of fracture toughness:

[0092] According to the measurement standard of GB / T 7732-2008 "Test method for fracture toughness of surface-cracked tension specimens of metallic materials", the high-flowability titanium alloy powders prepared in Examples 1 - 5 and Comparative Examples 1 - 10 were made into surface-cracked tension specimens, and then the fracture toughness (MPa·m 1 / 2 ) was measured; the measurement results are shown in Table 1;

[0093] Table 1

[0094]

[0095] Data analysis:

[0096] As can be seen from Table 1, the high-flowability titanium alloy powders prepared in the present invention have better stability, fluidity, oxygen content stability, apparent density (sphericity), and fracture toughness of the prepared specimens;

[0097] This may be because the addition of the flow aid in the present invention can generate a stable nanoscale passivation film on the surface of the titanium alloy powder, thereby improving the fluidity of the titanium alloy powder, and at the same time reducing the possibility of the titanium alloy powder adsorbing interstitial elements such as oxygen and nitrogen in the environment, making the prepared high-flowability titanium alloy powder have higher purity; the synergist can react with the passivation film when the high-flowability titanium alloy powder is heat-treated, improving the plasticity of the high-flowability titanium alloy powder and the fracture toughness of the prepared device. Therefore, compared with the prior art, the titanium alloy powder prepared in the present invention has better stability, fluidity, oxygen content stability, and sphericity while not affecting the plastic properties such as the fracture toughness of the prepared specimens. The present invention also adjusts the particle size of the titanium alloy powder, the particle size of the flow aid, and the particle size of the synergist, so that the particle size of the prepared high-flowability titanium alloy powder is kept between 21 - 30 μm, thereby further improving the forming ability of the high-flowability titanium alloy powder and the mechanical properties of the prepared specimens.

[0098] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0099] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for preparing high fluidity titanium alloy powder, characterized in that: The following steps are involved: Step S1: after introducing a protective gas, the titanium alloy wire is sent into a plasma generator for vaporization and smelting to form a fine spherical titanium alloy powder, and then sieved under the protective atmosphere to obtain a titanium alloy powder; Step S2: spraying a flow aid onto the surface of the titanium alloy powder, stirring evenly, and then spraying a synergist and stirring evenly to obtain a high-flowability titanium alloy powder; The particle size of the flow aid is 21-30 μm; The flow aid is any one of metal chloride and halogenated hydrocarbon organic compound; The particle size of the synergist is 21-30 μm; The synergist is prepared from PdCl3 and PtCl2.

2. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The protective gas flow rate described in step S1 is 1-6 slpm; The titanium alloy wire feeding rate in step S1 is 10-600 g / min; The power of the plasma generator in step S1 is 15-200KW, the pressure is 103.4-130.9Kpa, the central gas flow is 8-100slpm, the auxiliary gas flow is 25-100slpm, the argon flow is 30-300slpm, and the hydrogen flow is 2-80slpm.

3. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The diameter of the titanium alloy wire is 0.1-10 mm.

4. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The titanium alloy wire in step S1 is any one of α-type titanium alloy, α+β-type titanium alloy, and TiAl-type titanium alloy.

5. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The central gas in step S1 is argon; The auxiliary gas in step S1 is argon; The protective gas in step S1 is argon.

6. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The particle size of the titanium alloy powder in step S1 is 21-30 μm; The thickness of the passivation layer on the surface of the high-fluidity titanium alloy powder in step S1 is 1-7 nm.

7. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The metal chloride is any one of TiCl4 and SnCl4; The halogenated hydrocarbon organic compound is any one of CHCl3, CH2Cl2, C2HCl3, C2Cl4, and CCl4.

8. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The preparation method of the synergist is as follows: The synergist is obtained by uniformly mixing PdCl3 and PtCl2.

9. The method for preparing high fluidity titanium alloy powder according to claim 8, characterized in that: The mass ratio of PdCl3 to PtCl2 is 0.005-0.01:0.005-0.

02.

10. The method for preparing high fluidity titanium alloy powder according to claim 1, characterized in that: The mass ratio of the flow aid, synergist and titanium alloy powder in step S2 is 0.01-1:0.01-0.03:100.

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