Lanthanum iron molybdenum alloy cutting wire and method of manufacture

Abstract

This invention discloses a lanthanum-iron-molybdenum alloy cutting wire and its manufacturing method. The lanthanum-iron-molybdenum alloy cutting wire is made by adding 0.1-0.5% lanthanum nitrate solution and 0.01-0.05% ferric nitrate solution to molybdenum dioxide powder. The manufacturing method involves loading molybdenum dioxide powder into a mixer; mixing the lanthanum nitrate solution and ferric nitrate solution to form a mixture; loading the mixture into a feeder; adding the mixture to the mixer using the feeder while stirring; washing the feeder with pure water, and adding the washed solution to the mixer while stirring; thoroughly mixing and stirring in the mixer for 20-80 minutes; heating and drying after thorough mixing; cooling; and then processing the alloy wire. With a diameter of Φ0.18mm, its tensile strength can reach 2600-3500 N / mm². 2， When used in wire EDM, it is more wear-resistant and has a longer lifespan. Lanthanum-doped iron-molybdenum wire has a high recrystallization temperature, expanding the temperature range and extending the lifespan of the molybdenum wire.

Description

Technical Field

[0001] This invention relates to the field of cutting wire manufacturing technology, and in particular to a lanthanum-iron-molybdenum alloy cutting wire and its manufacturing method. Background Technology

[0002] Wire EDM technology is widely used in the machining industry. The electrode wire used for wire EDM is the main consumable. Wire EDM molybdenum wire is a molybdenum metal electrode wire made of molybdenum. It is used to process workpieces on a wire EDM machine tool with a high voltage electric field that moves continuously. The molybdenum metal electrode wire can perform pulse spark electro-erosion on the workpiece to cut the metal into shape. At present, there are two main types of wire EDM electrode wires on the market: (1) Molybdenum wire with a molybdenum content greater than 99.5% is used as the wire EDM electrode wire to cut metal workpieces into shape. When the working temperature of the pure molybdenum electrode wire exceeds 1200℃, it is prone to brittle fracture. (2) In order to improve the cutting life and cutting efficiency of wire EDM molybdenum alloy wire, a certain amount of rare earth elements are added to pure molybdenum. The strength of the molybdenum wire is improved through the effects of fine grain strengthening and dispersion strengthening. For example, molybdenum lanthanum alloy molybdenum wire with a molybdenum content greater than 99.5% and a lanthanum trioxide content of 2000~5000ppm is used as the wire EDM electrode wire to cut metal workpieces into shape. When the working temperature of the molybdenum lanthanum electrode wire exceeds 1400℃, it is prone to brittle fracture. When the diameter is Φ0.18mm, the tensile strength of pure molybdenum electrode wire is 1800~2200N / mm. 2 The tensile strength of the molybdenum-lanthanum electrode wire is 1900–2300 N / mm². 2 In wire EDM, continuously moving molybdenum wires are prone to breakage due to insufficient strength. Currently, the mainstream molybdenum wire for wire EDM is a molybdenum-lanthanum alloy wire. However, this alloy still suffers from high breakage rates, low cutting efficiency, and short service life, thus requiring further improvement in the tensile strength of the wire EDM molybdenum wire. Differences in molybdenum powder preparation processes also exist: cobalt-doped magnesium-molybdenum powder tends to stick to the boat during reduction, resulting in high impurity content and low yield; lanthanum-doped cobalt-molybdenum powder is difficult to grow in particle size, making pressing and loading difficult. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lanthanum-iron-molybdenum alloy cutting wire and its manufacturing method.

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

[0005] A lanthanum-iron-molybdenum alloy cutting wire is manufactured by adding 0.1-0.5% lanthanum nitrate solution and 0.01-0.05% ferric nitrate solution to molybdenum dioxide powder. The concentration of the lanthanum nitrate solution is 0.37-0.38 g / ml, and the concentration of the ferric nitrate solution is 0.023-0.024 g / ml.

[0006] Furthermore, the concentration of the lanthanum nitrate solution is 0.3721 g / ml, and the concentration of the ferric nitrate solution is 0.02314 g / ml.

[0007] A method for manufacturing a lanthanum-iron-molybdenum alloy cutting wire, characterized in that the manufacturing method includes the following steps:

[0008] S1: Load the molybdenum dioxide powder into the mixer;

[0009] S2: The lanthanum nitrate solution and the ferric nitrate solution are mixed to form a mixture;

[0010] S3: Load the mixture into the dispenser;

[0011] S4: The mixture is added to the mixer using the liquid adder, and stirring is performed simultaneously during the addition;

[0012] S5: Add pure water to the liquid dispenser to wash the liquid dispenser, and add the washed solution to the mixer while stirring;

[0013] S6: Mix thoroughly in the mixer for 20-80 minutes;

[0014] S7: After thorough mixing, heat and dry;

[0015] S8: Cooling;

[0016] S9: After cooling, disperse and mix again, then sieve;

[0017] S10: Processing alloy wire.

[0018] Further, the mixture in step S2 comprises 0.15–0.35% lanthanum nitrate solution and 0.01–0.03% ferric nitrate solution.

[0019] Furthermore, in step S4, the liquid dispenser adds the mixture into the mixer by spraying.

[0020] Furthermore, the mixing time in step S6 is 30 to 60 minutes.

[0021] Furthermore, the heating and drying method used in step S7 is steam heating and drying.

[0022] Furthermore, the cooling in step S8 needs to be cooled to room temperature.

[0023] Furthermore, the dispersion in step S9 is carried out using an airflow disperser, and the dispersed molybdenum dioxide is in a non-agglomerated state. The additives in the molybdenum dioxide are further evenly distributed by re-mixing.

[0024] Further, the processing of the alloy wire in step S10 includes the following steps:

[0025] S10.1: After cooling, it is reduced to lanthanum-iron-molybdenum alloy powder;

[0026] S10.2: The lanthanum-iron-molybdenum alloy powder is pressed into billets, and the pressure of the billet press is 15-25 MPa;

[0027] S10.3: Perform pre-sintering on the billet strip;

[0028] S10.4: The billet is sintered;

[0029] S10.5: Forging and rolling the sintered billet;

[0030] S10.6: Draw the forged and rolled billet into wire.

[0031] The beneficial effects of this invention are:

[0032] 1) When the diameter is Φ0.18mm, its tensile strength can reach 2600~3500N / mm. 2， It is more wear-resistant and has a longer lifespan when used for wire EDM.

[0033] 2) Lanthanum-doped iron-molybdenum wire has a high recrystallization temperature, which expands the operating temperature range of molybdenum wire and extends its lifespan.

[0034] 3) The lanthanum-doped iron-molybdenum powder in the lanthanum-doped iron-molybdenum wire is easy to grow in size, and is easier to press and sinter. Attached Figure Description

[0035] Figure 1 This is a flowchart of the manufacturing process of the present invention; Detailed Implementation

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See Figure 1 The present invention provides a technical solution:

[0038] A lanthanum-iron-molybdenum alloy cutting wire is manufactured by adding 0.1-0.5% lanthanum nitrate solution and 0.01-0.05% ferric nitrate solution to molybdenum dioxide powder. The concentration of the lanthanum nitrate solution is 0.37-0.38 g / ml, and the concentration of the ferric nitrate solution is 0.023-0.024 g / ml. In this technical solution, the concentration of the lanthanum nitrate solution is 0.3721 g / ml, and the concentration of the ferric nitrate solution is 0.02314 g / ml. The 0.1-0.5% lanthanum nitrate solution and the 0.01-0.05% ferric nitrate solution are added according to a mass ratio.

[0039] In this technology, the solvent of the lanthanum nitrate solution is deionized water, and the solute is lanthanum nitrate; the solvent of the ferric nitrate solution is deionized water, and the solute is ferric nitrate.

[0040] A method for manufacturing a lanthanum-iron-molybdenum alloy cutting wire, the method comprising the following steps:

[0041] (1) Load molybdenum dioxide powder into a mixer. The mixer is an existing technology equipment that plays a mixing role and will automatically stir during the mixing process.

[0042] (2) A mixture is formed by mixing a lanthanum nitrate solution and an iron nitrate solution, wherein the mixture comprises 0.15-0.35% lanthanum nitrate solution and 0.01-0.03% iron nitrate solution.

[0043] (3) The mixture is loaded into the dispenser, which is a dispenser with spraying capability in the prior art.

[0044] (4) Use a liquid adder to add the mixture into the mixer while stirring. The liquid adder adds the mixture into the mixer by spraying.

[0045] (5) Add pure water to the liquid dispenser to wash the liquid dispenser, and add the washed solution to the mixer while stirring. The purpose of washing is to thoroughly clean the lanthanum nitrate solution and ferric nitrate solution in the liquid dispenser and add them to the mixer.

[0046] (6) Mix thoroughly in the mixer for 20 to 80 minutes. Under normal circumstances, the commonly used mixing time is 30 to 60 minutes.

[0047] (7) After thorough mixing, heat and dry. The heating and drying method is steam heating and drying.

[0048] (8) Cooling: Generally, cooling needs to be done to room temperature, which is about 25°C.

[0049] (9) After cooling, the mixture is dispersed and remixed, and then sieved. The dispersion step is carried out using an airflow disperser. The dispersed molybdenum dioxide is in a non-agglomerated state. Remixing ensures that the additives in the molybdenum dioxide are more evenly distributed.

[0050] (10) Processing alloy wire involves the following steps: First, cooling and reducing the alloy wire to lanthanum-iron-molybdenum alloy powder; then pressing the lanthanum-iron-molybdenum alloy powder into billets, with the pressure of the billet press being 15-25 MPa; further pre-sintering the billets; further sintering the billets; then forging and rolling the sintered billets; finally, drawing the forged and rolled billets into wires. Example 1

[0051] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition amount of lanthanum nitrate solution is 0.205%, and the addition amount of ferric nitrate solution is 0.05%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 3630 MPa.

[0052] Example 2

[0053] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition amount of lanthanum nitrate solution is 0.205%, and the addition amount of ferric nitrate solution is 0.045%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 3490 MPa.

[0054] Example 3

[0055] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition amount of lanthanum nitrate solution is 0.185%, and the addition amount of ferric nitrate solution is 0.04%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, rolled, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 3090 MPa.

[0056] Example 4

[0057] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition amount of lanthanum nitrate solution is 0.185%, and the addition amount of ferric nitrate solution is 0.03%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2790 MPa.

[0058] Example 5

[0059] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition of lanthanum nitrate solution is 0.2%, and the addition of ferric nitrate solution is 0.02%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, rolled, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2650 MPa.

[0060] Example 6

[0061] Molybdenum dioxide powder was loaded into a mixer; ferric nitrate solution and lanthanum nitrate solution were mixed and placed into a liquid feeder, and then added to the mixer by spraying while mixing. The concentration of lanthanum nitrate solution used was 0.3721 g / ml, and the concentration of ferric nitrate solution used was 0.02314 g / ml. Based on the mass of molybdenum powder, the addition of lanthanum nitrate solution is 0.195%, and the addition of ferric nitrate solution is 0.015%. The feeder is washed with pure water, and the washing liquid is sprayed into the mixer while mixing. After the solution is sprayed, molybdenum dioxide is mixed for 30 minutes. The molybdenum dioxide powder is then mixed with cobalt nitrate solution and lanthanum nitrate solution and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder is removed. It is then drawn into fibers, and the above raw materials are reduced according to existing technology. The reduction process involves reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process is as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, rolled, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2520 MPa.

[0062] Example 7

[0063] Molybdenum dioxide powder was loaded into a mixer. Lanthanum nitrate solution was added to a feeder and sprayed into the mixer while mixing. The concentration of the lanthanum nitrate solution used was 0.3721 g / ml. Based on the mass of molybdenum powder, the amount of lanthanum nitrate solution added was 0.185%. The feeder was washed with pure water, and the washing liquid was sprayed into the mixer while mixing. After the solution was sprayed, molybdenum dioxide was mixed for 30 minutes. The molybdenum dioxide powder and lanthanum nitrate solution were mixed and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder was removed. The powder was drawn into fibers, and the above raw materials were reduced according to existing technology. The reduction process involved reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process was as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2345 MPa.

[0064] Example 8

[0065] Molybdenum dioxide powder was loaded into a mixer. Lanthanum nitrate solution was added to a feeder and sprayed into the mixer while mixing. The concentration of the lanthanum nitrate solution used was 0.3721 g / ml. Based on the mass of molybdenum powder, the amount of lanthanum nitrate solution added was 0.265%. The feeder was washed with pure water, and the washing liquid was sprayed into the mixer while mixing. After the solution was sprayed, molybdenum dioxide was mixed for 30 minutes. The molybdenum dioxide powder and lanthanum nitrate solution were mixed and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder was removed. It was then drawn into fibers, and the above raw materials were reduced according to existing technology. The reduction process involved reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process was as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2475 MPa.

[0066] Example 9

[0067] Molybdenum dioxide powder was loaded into a mixer. Lanthanum nitrate solution was added to a feeder and sprayed into the mixer while mixing. The concentration of the lanthanum nitrate solution used was 0.3721 g / ml. Based on the mass of molybdenum powder, the amount of lanthanum nitrate solution added was 0.365%. The feeder was washed with pure water, and the washing liquid was sprayed into the mixer while mixing. After the solution was sprayed, molybdenum dioxide was mixed for 30 minutes. The molybdenum dioxide powder and lanthanum nitrate solution were mixed and dried using steam heating while mixing. After cooling to room temperature, the doped molybdenum dioxide powder was removed. The powder was drawn into fibers, and the above raw materials were reduced according to existing technology. The reduction process involved reducing the doped molybdenum dioxide to doped molybdenum powder in a reduction furnace. The reduction process was as follows: temperature controlled at 900–1000℃, material layer thickness controlled at 18–22 mm, boat pushing speed at 20–25 min / pass, and hydrogen flow rate at 20–30 m³ / min. 3 The obtained molybdenum-doped powder was then pressed into molybdenum billets, which were then sintered, forged, rolled, and drawn into molybdenum wires. The tensile strength of the molybdenum wire produced in this embodiment was tested to be 2512 MPa.

[0068] Comparison Table of Implementation Examples

[0069] one 0.205 0.050 3630 two 0.205 0.045 3490 three 0.185 0.040 3090 Four 0.185 0.030 2790 five 0.200 0.020 2650 six 0.195 0.015 2520 seven 0.185 / 2345 eight 0.265 / 2475 Nine 0.365 / 2512

[0070] In all the above embodiments, the wire cutting wire was tested with a diameter of Φ0.18mm. With a diameter of Φ0.18mm, its tensile strength can reach 2600–3500 N / mm². 2When used in wire EDM, it is more wear-resistant and has a longer lifespan. Lanthanum-doped iron-molybdenum wire has a high recrystallization temperature, expanding the operating temperature range of the molybdenum wire and extending its lifespan. The lanthanum-doped iron-molybdenum powder in the wire is prone to large particle size growth, making pressing and sintering easier.

[0071] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A lanthanum-iron-molybdenum alloy cutting wire, characterized in that: Based on the mass of molybdenum dioxide powder, it is manufactured by adding 0.1-0.5% lanthanum nitrate solution and 0.01-0.05% ferric nitrate solution to molybdenum dioxide powder and then processing it. The concentration of the lanthanum nitrate solution is 0.37-0.38 g / ml, and the concentration of the ferric nitrate solution is 0.023-0.024 g / ml.

2. The lanthanum-iron-molybdenum alloy cutting wire according to claim 1, characterized in that: The concentration of the lanthanum nitrate solution is 0.3721 g / ml, and the concentration of the ferric nitrate solution is 0.02314 g / ml.

3. A method for manufacturing a lanthanum-iron-molybdenum alloy cutting wire, used for processing the lanthanum-iron-molybdenum alloy cutting wire as described in claim 1 or 2, characterized in that: The manufacturing method includes the following steps: S1: Load the molybdenum dioxide powder into the mixer; S2: The lanthanum nitrate solution and the ferric nitrate solution are mixed to form a mixture; S3: Load the mixture into the dispenser; S4: The mixture is added to the mixer using the liquid adder, and stirring is performed simultaneously during the addition; S5: Add pure water to the liquid dispenser to wash the liquid dispenser, and add the washed solution to the mixer while stirring; S6: Mix thoroughly in the mixer for 20-80 minutes; S7: After thorough mixing, heat and dry; S8: Cooling; S9: After cooling, disperse and mix again, then sieve; S10: Processing alloy wire.

4. The manufacturing method according to claim 3, characterized in that: The mixture in step S2 comprises 0.15-0.35% lanthanum nitrate solution and 0.01-0.03% ferric nitrate solution.

5. The manufacturing method according to claim 3, characterized in that: In step S4, the liquid dispenser adds the mixture into the mixer by spraying.

6. The manufacturing method according to claim 3, characterized in that: The mixing time in step S6 is 30-60 minutes.

7. The manufacturing method according to claim 3, characterized in that: The heating and drying method used in step S7 is steam heating and drying.

8. The manufacturing method according to claim 3, characterized in that: The cooling process in step S8 requires cooling to room temperature.

9. The manufacturing method according to claim 3, characterized in that: The dispersion step in step S9 uses an airflow disperser to disperse the molybdenum dioxide. The dispersed molybdenum dioxide is in a non-agglomerated state, and the additives in the molybdenum dioxide are further mixed to ensure a more uniform distribution.

10. The manufacturing method according to claim 3, characterized in that: The processing of the alloy wire in step S10 includes the following steps: S10.1: After cooling, it is reduced to lanthanum-iron-molybdenum alloy powder; S10.2: The lanthanum-iron-molybdenum alloy powder is pressed into billets, and the pressure of the billet press is 15-25 MPa; S10.3: Perform pre-sintering on the billet strip; S10.4: The billet is sintered; S10.5: Forging and rolling the sintered billet; S10.6: Draw the forged and rolled billet into wire.

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