Method for reducing blocking rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization method

Abstract

The invention relates to the technical field of alloy powder preparation, in particular to a method for reducing the blocking rate of GH3625 nickel-based high-temperature alloy powder prepared through a vacuum gas atomization method. Performing vacuum melting; the atomization steel casting process lasts for 20 min, when the atomization steel casting process lasts for 0-5 min, the argon pressure is the set pressure, and the argon temperature is the normal temperature; when atomized steel casting is conducted for 5-10 min, the argon pressure is 0.20 MPa, and the argon temperature is 60 DEG C; when atomized steel casting is conducted for 10-15 min, the argon pressure is 0.15 MPa, and the argon temperature is 100 DEG C; atomized steel casting is conducted for 15 min till atomized steel casting is finished, the argon pressure is smaller than 0.1 MPa, and the argon temperature is 150 DEG C; and screening and grading. According to the method, the blocking rate can be reduced to 10% or below, the production efficiency is remarkably improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alloy powder preparation, in particular to a method for reducing the blocking rate of GH3625 nickel-based superalloy powder prepared by a vacuum gas atomization method. BACKGROUND

[0002] GH3625 (GH625) alloy is a solid solution strengthening type of nickel-based deformed superalloy with molybdenum and niobium as the main strengthening elements, which has excellent corrosion resistance and oxidation resistance, good tensile properties and fatigue properties from low temperature to 980 DEG C, and good stress corrosion resistance in salt mist atmosphere, and is widely used in the field of additive manufacturing technology. The field of additive manufacturing technology, in a broad sense, includes 3D printing, laser cladding, thermal spraying, etc. The GH3625 nickel-based superalloy powder used for 3D printing requires a particle size of 15-53 μm, good flowability and sphericity, and low oxygen and nitrogen contents; the GH3625 nickel-based superalloy powder used for laser cladding requires a particle size of 53-150 μm and good sphericity.

[0003] In the preparation of GH3625 nickel-based superalloy powder by a vacuum atomization method, under the condition that the atomization nozzle and the flow guide pipe are matched and unchanged, the alloy steel liquid is atomized by high-pressure argon impact, because the atomization nozzle and the flow guide pipe have a small inner diameter, the thinnest part of the flow guide pipe through which the alloy steel liquid flows has an inner diameter of only 4-6 mm, and the alloy steel liquid has a large viscosity and a fast cooling rate, the flow guide pipe is often blocked by the alloy steel liquid before the alloy steel liquid is poured, the blocking rate is usually more than 40%, and the production efficiency is low and the production cost is high. SUMMARY

[0004] In view of the problems of low production efficiency and high production cost caused by the flow guide pipe blockage in the prior art, the present application provides a method for reducing the blocking rate of GH3625 nickel-based superalloy powder prepared by a vacuum gas atomization method.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A method for reducing the blocking rate of GH3625 nickel-based superalloy powder prepared by a vacuum gas atomization method, comprising the following steps:

[0007] S1, batching and charging: batching according to the alloy composition of GH3625 specified in GB / T14992-2005, charging nickel blocks at the bottom and upper part of the crucible in the melting chamber, and charging chromium, molybdenum, titanium, aluminum, carbon, iron, and niobium in the middle, to ensure that the charging is compact;

[0008] S2, vacuum melting: a ceramic filter with a porosity of 1.5-2mm is arranged at the bottom of the tundish crucible; the furnace cover is closed, the melting chamber and the atomization chamber are first vacuumed and then filled with argon, the above-mentioned vacuuming and argon filling operations are repeated once, and then the melting chamber and the atomization chamber are vacuumed again; the melting chamber is heated to 1450-1550℃ for 15-20min; then the alloy liquid is heated to 1550-1600℃, vacuumed to 800-1200Pa, and kept for 10-15min to remove the liquid film on the surface of the alloy liquid;

[0009] S3, atomization and pouring: the alloy liquid is heated to 1620-1660℃ and kept for 5-10min, while argon is filled into the melting chamber and the atomization chamber to 6.8-7.2×10 4 Pa; the exhaust fan of the atomization chamber is started, the argon flowing into the atomization nozzle is started, and the pressure and flow rate are adjusted to the set pressure and flow rate, and the argon temperature is kept below 10℃; the alloy liquid is heated to 1680-1720℃, and then immediately poured into the tundish, the alloy liquid flows into the atomization nozzle and is atomized and broken by high-pressure argon to form spherical GH3625 nickel-based superalloy powder; the atomization and pouring process lasts for 20-25min, during 0-5min of atomization and pouring, the argon pressure is the set pressure and the argon temperature is normal temperature; during 5-10min of atomization and pouring, the argon pressure is 0.15-0.20MPa and the argon temperature is 60-65℃; during 10-15min of atomization and pouring, the argon pressure is 0.1-0.15MPa and the argon temperature is 100-110℃; during 15min of atomization and pouring to the end of atomization and pouring, the argon pressure is less than 0.1MPa and the argon temperature is 140-150℃;

[0010] S4, screening and grading: after the alloy powder in the powder collecting tank below the atomization chamber is cooled to a certain temperature, the alloy powder is screened and graded by ultrasonic vibration screen and airflow classification to form spherical GH3625 nickel-based superalloy powder with different particle sizes.

[0011] Further, in S1, the proportion of aluminum is the upper limit specified in GB / T14992-2005.

[0012] Further, in S2, the diameter of the ceramic filter is 7-8cm and the thickness is 2-3cm.

[0013] Further, in S2, the melting chamber and the atomization chamber are vacuumed to a pressure below 10Pa, and the melting chamber and the atomization chamber are filled with argon to a pressure of 4-5.5×10 4 Pa.

[0014] Further, in S2, during the refining process, argon is first filled into the melting chamber to a pressure of 4-5.5×10 4 Pa, and then vacuumed to a pressure below 10Pa.

[0015] Further, in S4, the alloy powder is classified into four kinds of spherical GH3625 nickel-based superalloy powder with particle sizes less than 15 μm, 15-53 μm, 53-150 μm and greater than 150 μm through ultrasonic vibration screening and airflow classification.

[0016] Compared with the prior art, the method has the following beneficial effects:

[0017] The method for reducing the clogging rate of GH3625 nickel-based superalloy powder prepared by the vacuum gas atomization method provided by the application can filter large-size insoluble substances and slag on the inner wall of a smelting crucible through the ceramic filter to prevent clogging caused by large-size impurities. The vacuum smelting process is divided into two stages for temperature rising and refining, which can make the temperature rising curve smoothly rise, prevent clogging caused by splashing of the molten steel, and prolong the refining time to improve the uniformity of the molten steel elements and avoid segregation. The process can also remove the liquid film on the surface of the alloy molten steel and impurities such as oxygen and nitrogen to prevent clogging caused by the liquid film. The atomization steel pouring process is divided into two stages for temperature rising to ensure that the temperature of the alloy molten steel can reach 1680-1720 ℃ during atomization steel pouring, that is, the superheat degree of the alloy molten steel reaches 20-80 ℃, which prevents the alloy molten steel from being cooled too quickly and the viscosity from increasing under the condition of being lower than 1680 ℃, and the limited superheat degree will not cause the smelting crucible to be quickly damaged. The atomization steel pouring starts to use normal temperature argon, which has a significant cooling effect on the alloy molten steel. As the atomization steel pouring proceeds, the temperature of the alloy molten steel significantly decreases. By gradually increasing the temperature of the argon, clogging caused by too rapid cooling of the molten steel flowing through the flow guide pipe is prevented. As the atomization steel pouring proceeds, the temperature of the molten steel decreases and the viscosity increases. By gradually reducing the argon pressure and the argon flow rate, the heat absorbed by the argon from the alloy molten steel is reduced, thereby preventing the molten steel flowing through the flow guide pipe from being cooled too quickly and causing clogging. The method can reduce the clogging rate to less than 10%, significantly improve the production efficiency, and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The embodiments of the application are further described below with reference to the accompanying drawings, in which:

[0019] Figure 1 A process flow chart of the method for reducing the clogging rate of GH3625 nickel-based superalloy powder prepared by the vacuum gas atomization method is shown.

[0020] Figure 2 SEM powder morphology photos of the 3D printing powder in Example 1 are shown.

[0021] Figure 3 SEM powder morphology photos of the 3D printing powder in Example 2 are shown. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with specific examples in combination with the drawings. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0023] Example 1

[0024] A method for reducing the plugging rate of GH3625 nickel-based superalloy powder prepared by vacuum gas atomization method, comprising the following steps:

[0025] S1, batching and charging: 180 kg of GH3625 alloy components according to GB / T14992-2005 are batched, and the specific components include Cr 39.6 kg, Mo 16.2 kg, Nb 6.66 kg, Al 0.72 kg, Ti 0.36 kg, C 0.09 kg, Fe 4.5 kg, Ni 111.87 kg; nickel blocks are placed at the bottom and upper part of the smelting chamber crucible, and chromium, molybdenum, titanium, aluminum, carbon, iron, niobium are placed in the middle to ensure that the charge is compact;

[0026] S2, vacuum melting: a ceramic filter with a diameter of 8 cm, a thickness of 2 cm and a pore size of 2 mm is arranged at the bottom of the tundish crucible; close the furnace cover, first vacuum the smelting chamber and atomization chamber to below 10 Pa, then fill in argon to a pressure of 4×10 4 Pa, repeat the above vacuum and argon filling operation once, and then vacuum the smelting chamber and atomization chamber to below 10 Pa again; the smelting chamber is heated to 1450℃, first filled with argon to a pressure of 4×10 4 Pa, vacuum to below 10 Pa, refining for 20 min; then heat the alloy liquid to 1550℃, vacuum to 800 Pa, keep for 15 min, remove the liquid film on the surface of the alloy liquid;

[0027] S3, atomization and steel pouring: heat the alloy liquid to 1620℃, keep for 10 min, and at the same time, fill argon into the smelting chamber and atomization chamber to 6.8×10 4Pa; turn on the atomization chamber exhaust fan, turn on the argon gas into the atomization nozzle, adjust to the set pressure and flow rate, and keep the argon gas temperature below 10℃; heat the alloy steel liquid to 1680℃, immediately pour the alloy steel liquid into the tundish, and the alloy steel liquid flows into the atomization nozzle and is atomized and broken by high-pressure argon gas to form spherical GH3625 nickel-based superalloy powder; the atomization pouring process is 20min, during 0-5min of the atomization pouring, the argon gas pressure is the set pressure, and the argon gas temperature is normal temperature; during 5-10min of the atomization pouring, the argon gas pressure is 0.20MPa, and the argon gas temperature is 60℃; during 10-15min of the atomization pouring, the argon gas pressure is 0.15MPa, and the argon gas temperature is 100℃; during 15min of the atomization pouring to the end of the atomization pouring, the argon gas pressure is less than 0.1MPa, and the argon gas temperature is 150℃;

[0028] S4, screening and grading: after the alloy powder in the powder collecting tank below the atomization chamber is cooled to a certain temperature, the alloy powder is screened and graded by an ultrasonic vibration screen and airflow classification, and is divided into four kinds of spherical GH3625 nickel-based superalloy powder with different particle sizes, i.e., less than 15μm, 15-53μm, 53-150μm, and greater than 150μm.

[0029] The process conditions of the embodiment are used to produce 30 batches of spherical GH3625 nickel-based superalloy powder, in which 2 batches of the alloy powder appear to be blocked, and the blocking rate is 6.7%.

[0030] The detection results of the 3D printing powder prepared by using the GH3625 nickel-based superalloy powder with a particle size of 15-53μm obtained from one batch of the embodiment are shown in Table 1.

[0031] Table 1

[0032]

[0033] Example 2

[0034] A method for reducing the blocking rate of GH3625 nickel-based superalloy powder prepared by a vacuum gas atomization method, comprising the following steps:

[0035] S1, batching and charging: batch 240kg of GH3625 alloy components according to GB / T14992-2005, and the specific components include Cr 52.8kg, Mo 21.6kg, Nb 8.88kg, Al 0.96kg, Ti 0.48kg, C 0.12kg, Fe 6.0kg, and Ni 149.2kg; charge nickel blocks at the bottom and top of the smelting chamber crucible, and charge chromium, molybdenum, titanium, aluminum, carbon, iron, and niobium in the middle, and ensure that the charging is compact;

[0036] S2, vacuum melting: a ceramic filter with a diameter of 7 cm, a thickness of 3 cm and a porosity of 1.5 mm is arranged at the bottom of the tundish crucible; the furnace cover is closed, the melting chamber and the atomization chamber are first vacuumed to below 10 Pa, then argon is filled to a pressure of 5.5 x 10 4 Pa, the above-mentioned vacuuming and argon filling operations are repeated once, and then the melting chamber and the atomization chamber are vacuumed to below 10 Pa; the melting chamber is heated to 1550℃, argon is first filled to a pressure of 5.5 x 10 4 Pa, then vacuumed to below 10 Pa, and refined for 15 min; then the alloy liquid is heated to 1600℃, vacuumed to 1200 Pa, and kept for 10 min to remove the liquid film on the surface of the alloy liquid;

[0037] S3, atomization and pouring: the alloy liquid is heated to 1660℃ and kept for 5 min, while argon is filled into the melting chamber and the atomization chamber to a pressure of 7.2 x 10 4 Pa; the exhaust fan of the atomization chamber is turned on, the argon flowing into the atomization nozzle is adjusted to the set pressure and flow rate, and the argon temperature is kept below 10℃; the alloy liquid is heated to 1720℃, and then immediately poured into the tundish, the alloy liquid flows into the atomization nozzle and is broken into spherical GH3625 nickel-based superalloy powder by high-pressure argon atomization; the atomization and pouring process lasts for 25 min, during 0-5 min of atomization and pouring, the argon pressure is the set pressure and the argon temperature is normal temperature; during 5-10 min of atomization and pouring, the argon pressure is 0.15 MPa and the argon temperature is 65℃; during 10-15 min of atomization and pouring, the argon pressure is 0.1 MPa and the argon temperature is 110℃; during 15 min of atomization and pouring to the end of atomization and pouring, the argon pressure is less than 0.1 MPa and the argon temperature is 140℃;

[0038] S4, screening and grading: after the alloy powder in the powder collecting tank below the atomization chamber is cooled to a certain temperature, the alloy powder is screened and graded by ultrasonic vibration screen and airflow classification, and is divided into four kinds of spherical GH3625 nickel-based superalloy powder with different particle sizes, i.e., less than 15 μm, 15-53 μm, 53-150 μm and greater than 150 μm.

[0039] The process conditions of the present embodiment are used to produce 30 batches of spherical GH3625 nickel-based superalloy powder, among which 3 batches appear to be blocked, and the blocking rate is 10%.

[0040] The detection results of the 3D printing powder prepared from the GH3625 nickel-based superalloy powder with a particle size of 15-53 μm obtained from one batch of the present embodiment are shown in Table 2.

[0041] Table 2

[0042]

[0043]

[0044] Comparative Example 1

[0045] A method for reducing the clogging rate of GH3625 nickel-based superalloy powder prepared by a vacuum air atomization method, comprising the following steps:

[0046] S1, batching and charging: 180 kg of GH3625 alloy components according to GB / T14992-2005 are batched, and the specific components include Cr 39.6 kg, Mo 16.2 kg, Nb 6.66 kg, Al 0.72 kg, Ti 0.36 kg, C 0.09 kg, Fe 4.5 kg, and Ni 111.87 kg; nickel blocks are placed at the bottom and top of the crucible in the melting chamber, and chromium, molybdenum, titanium, aluminum, carbon, iron, and niobium are placed in the middle to ensure that the charge is compacted;

[0047] S2, vacuum melting: close the furnace cover, and first vacuumize the melting chamber and the atomization chamber to below 10 Pa, then fill in argon to a pressure of 4x10 4 Pa, repeat the above vacuumizing and argon filling operation once, and then vacuumize the melting chamber and the atomization chamber to below 10 Pa again; heat the melting chamber to 1450℃, first fill in argon to a pressure of 4x10 4 Pa, then vacuumize to below 10 Pa, and refine for 20 min;

[0048] S3, atomization and pouring: heat the alloy steel liquid to 1620℃ and keep for 10 min, while filling in argon to 6.8x10 4 Pa in the melting chamber and the atomization chamber; open the exhaust fan of the atomization chamber, open the argon inlet of the atomization nozzle, adjust to the set pressure and flow rate, and keep the argon temperature below 10℃; pour the alloy steel liquid into the tundish, and the alloy steel liquid flows into the atomization nozzle and is atomized and broken by high-pressure argon to form spherical GH3625 nickel-based superalloy powder;

[0049] S4, screening and grading: after the alloy powder in the powder collecting tank below the atomization chamber is cooled to a certain temperature, the alloy powder passes through the ultrasonic vibration screen and airflow classification, and is divided into four kinds of spherical GH3625 nickel-based superalloy powder with different particle sizes, i.e., less than 15 μm, 15-53 μm, 53-150 μm, and greater than 150 μm.

[0050] The process conditions of the present embodiment are used to produce 30 batches of spherical GH3625 nickel-based superalloy powder, among which 12 batches appear clogging, and the clogging rate is 40%.

[0051] Comparative Example 2

[0052] A method for reducing the clogging rate of GH3625 nickel-based superalloy powder prepared by a vacuum air atomization method, comprising the following steps:

[0053] S1, batching and charging: 180 kg of GH3625 alloy ingredients according to GB / T 14992-2005 are batched, and the specific ingredients include Cr 39.6 kg, Mo 16.2 kg, Nb 6.66 kg, Al 0.72 kg, Ti 0.36 kg, C 0.09 kg, Fe 4.5 kg, and Ni 111.87 kg; nickel blocks are loaded at the bottom and upper part of the smelting chamber crucible, and chromium, molybdenum, titanium, aluminum, carbon, iron, and niobium are loaded in the middle to ensure that the loading is compact;

[0054] S2, vacuum smelting: the furnace cover is closed, the smelting chamber and the atomization chamber are first evacuated to below 10 Pa, then argon is filled to a pressure of 4x10 4 Pa, the above-mentioned vacuumizing and argon filling operations are repeated once, and then the smelting chamber and the atomization chamber are evacuated to below 10 Pa; the smelting chamber is heated to 1600℃, argon is first filled to a pressure of 4x10 4 Pa, and then vacuumized to below 10 Pa for 20 min;

[0055] S3, atomization and pouring of steel: the alloy liquid is heated to 1700℃ and kept for 10 min, while argon is filled to 6.8x10 4 Pa in the smelting chamber and the atomization chamber; the atomization chamber exhaust fan is turned on, and argon is introduced into the atomization nozzle, which is adjusted to the set pressure and flow rate, and the argon temperature is kept below 10℃; the alloy liquid is poured into the tundish, and the alloy liquid flows into the atomization nozzle and is broken into spherical GH3625 nickel-based superalloy powder by high-pressure argon atomization;

[0056] S4, screening and grading: after the alloy powder in the powder collecting tank below the atomization chamber is cooled to a certain temperature, the alloy powder is screened and graded by ultrasonic vibration screen and airflow classification, and is divided into four kinds of spherical GH3625 nickel-based superalloy powder with different particle sizes, i.e., less than 15 μm, 15-53 μm, 53-150 μm, and greater than 150 μm.

[0057] The process conditions of this embodiment are used to produce 30 batches of spherical GH3625 nickel-based superalloy powder, among which 14 batches appear to be blocked, and the blocking rate is 46.7%.

[0058] The application provides a method for reducing the plugging rate of GH3625 nickel-based superalloy powder prepared by a vacuum gas atomization method, wherein a ceramic filter is arranged to filter large-size insoluble substances and slag on the inner wall of a smelting crucible, so as to prevent plugging caused by large-size impurities; the vacuum smelting process is divided into two stages for temperature rising and refining, so as to make the temperature rising curve smoothly rise, prevent plugging caused by splashing of molten steel, prolong the refining time to improve the uniformity of elements in the molten steel and avoid segregation, remove the liquid film on the surface of the alloy molten steel and impurities such as oxygen and nitrogen, and prevent plugging caused by the liquid film; the atomization and steel pouring process is divided into two stages for temperature rising, so as to ensure that the temperature of the alloy molten steel can reach 1680-1720 DEG C during atomization and steel pouring, that is, the superheat degree of the alloy molten steel reaches 20-80 DEG C, prevent plugging caused by rapid temperature drop and viscosity increase of the alloy molten steel under the condition of being lower than 1680 DEG C, and the limited superheat degree will not cause rapid damage of the smelting crucible; normal temperature argon is used at the beginning of atomization and steel pouring, the cooling effect of the alloy molten steel is remarkable, the temperature of the alloy molten steel is significantly reduced during atomization and steel pouring, the argon temperature is gradually increased, and plugging caused by rapid cooling of the molten steel flowing through the flow guide pipe is prevented. With the atomization and steel pouring, the temperature of the molten steel is reduced and the viscosity is increased, the argon pressure is gradually reduced, the argon flow is reduced, so that the heat absorbed by the argon from the alloy molten steel is reduced, and plugging caused by rapid cooling of the molten steel flowing through the flow guide pipe is prevented. The method can reduce the plugging rate to less than 10%, significantly improve the production efficiency, and reduce the production cost.

[0059] Some example embodiments of the application are described above, and it can be understood that the above-described embodiments are only used to explain the application, and do not constitute a limitation on the protection scope of the application. The features in these embodiments can be recombined in a suitable manner, and the schemes obtained thereby are still within the protection scope required by the application. Based on the above-described embodiments, all other embodiments obtained by those skilled in the art without creative labor, that is, all modifications, equivalent replacements and improvements, etc. made within the spirit and principles of the present application, are within the protection scope required by the application.

Claims

1. A method for reducing the clogging rate of GH3625 nickel-based superalloy powder prepared by vacuum gas atomization, characterized in that: The following steps are involved: S1. Ingredients and charging: Ingredients are prepared according to the GH3625 alloy composition specified in GB / T14992-2005. Nickel blocks are placed at the bottom and top of the crucible in the melting chamber, and chromium, molybdenum, titanium, aluminum, carbon, iron, and niobium are placed in the middle to ensure that the charging is dense; S2, vacuum melting: a ceramic filter with a pore size of 1.5-2 mm is set at the bottom of the tundish crucible; the furnace cover is closed, the melting chamber and the atomizing chamber are first evacuated, and then filled with argon, the above vacuuming and argon filling operations are repeated once, and then the melting chamber and the atomizing chamber are evacuated again; the melting chamber is heated to 1450-1550 ° C and refined for 15-20 min; then the alloy steel liquid is heated to 1550-1600 ° C, evacuated to 800-1200 Pa, maintained for 10-15 min, and the liquid film on the surface of the alloy steel liquid is removed; S3, atomization steel casting: heat the alloy steel liquid to 1620-1660℃, keep it warm for 5-10min, and fill the melting chamber and atomization chamber with argon gas to 6.8-7.2×10 4 Pa; turn on the exhaust fan of the atomizing chamber, turn on the argon gas entering the atomizing nozzle, adjust to the set pressure and flow, and keep the argon temperature below 10°C; heat the alloy steel liquid to 1680-1720°C, immediately pour the alloy steel liquid into the tundish, the alloy steel liquid flows into the atomizing nozzle, and is atomized and broken by the high-pressure argon gas to form spherical GH3625 nickel-based high-temperature alloy powder; the atomizing steel pouring process is 20-25min, and when the atomizing steel pouring is 0-5min, the argon pressure is the set pressure and the argon temperature is room temperature; when the atomizing steel pouring is 5-10min, the argon pressure is 0.15-0.20MPa and the argon temperature is 60-65°C; when the atomizing steel pouring is 10-15min, the argon pressure is 0.1-0.15MPa and the argon temperature is 100-110°C; when the atomizing steel pouring is 15min until the atomizing steel pouring is completed, the argon pressure is less than 0.1MPa and the argon temperature is 140-150°C; S4. Screening and grading: After the alloy powder in the powder collecting tank below the atomization chamber cools to a certain temperature, the alloy powder passes through an ultrasonic vibrating screen and air flow classification to be divided into spherical GH3625 nickel-based high-temperature alloy powders of different particle sizes.

2. The method for reducing the clogging rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization according to claim 1, characterized in that: In S1, the proportion of aluminum is the upper limit specified in GB / T14992-2005.

3. The method for reducing the clogging rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization according to claim 1, characterized in that: In S2, the ceramic filter has a diameter of 7-8 cm and a thickness of 2-3 cm.

4. The method for reducing the clogging rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization according to claim 1, characterized in that: In S2, the melting chamber and the atomizing chamber were evacuated to a pressure below 10 Pa, and the melting chamber and the atomizing chamber were filled with argon gas to a pressure of 4-5.5×10 4 Pa.

5. The method for reducing the clogging rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization according to claim 1, characterized in that: In S2, during the refining process, argon is first filled into the melting chamber to a pressure of 4-5.5×10 4 Pa, and then evacuate to a pressure below 10Pa.

6. The method for reducing the clogging rate of GH3625 nickel-based high-temperature alloy powder prepared by vacuum gas atomization according to claim 1, characterized in that: In S4, the alloy powder is separated into spherical GH3625 nickel-based high-temperature alloy powders with four particle sizes of less than 15μm, 15-53μm, 53-150μm, and greater than 150μm after ultrasonic vibration screening and air flow classification.

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