Preparation method of titanium-based amorphous brazing wire

Abstract

The invention discloses a preparation method of a titanium-based amorphous brazing wire. The method comprises the following steps: 1, smelting a high-purity metal raw material to obtain a master alloy ingot; 2, putting the master alloy ingot into an induction melting crucible of a vacuum melt-spinning machine; 3, vacuumizing and then filling a protective atmosphere; and fourthly, the master alloy ingot is heated, meanwhile, the copper roller starts to rotate, a magnetic field is added, high-purity argon is filled, pressure difference is formed, the melt of the master alloy ingot is sprayed out of a nozzle at the bottom of the induction melting crucible and rapidly cooled on the surface of the rotating copper roller, and the titanium-based amorphous brazing wire is formed. The vacuum single-roller rapid quenching method is adopted, technological parameters are strictly controlled, the magnetic field intensity is guided, fine control over the melt movement track is achieved, the titanium-based amorphous brazing wire high in purity, good in toughness and good in wettability is prepared, and the preparation method is simple, high in efficiency and suitable for industrial production. Complicated working procedures such as forging, rolling, heat treatment and drawing in a traditional technology and loss in the process are avoided, cost is reduced, and the method is suitable for the field of titanium-based brazing filler metal.

Description

Technical Field

[0001] The invention belongs to the technical field of titanium-based alloy vacuum brazing, and in particular relates to a method for preparing a titanium-based amorphous brazing wire. Background Art

[0002] Titanium alloys have developed into important structural materials in modern advanced aviation and aerospace structures. Titanium alloy brazing structures are widely used in aircraft parts. With the rapid development of the aerospace industry, the demand for titanium alloy brazing materials is increasing. Titanium-based brazing filler metals have high activity and good corrosion resistance of brazed joints, making them the best brazing filler metals for brazing titanium alloys.

[0003] At present, titanium-based brazing fillers are mainly used in powder or paste form. However, powder or paste is inconvenient to use, has poor wettability, is contaminated or has residue after heating, and is prone to defects such as pores and cracks. The preparation of traditional wires requires steps such as melting, rolling, and drawing, but the titanium alloy itself is relatively brittle and has poor processing performance, making it difficult to prepare into foil or wire. Although amorphous titanium-based wires can be prepared by vacuum single-roll rapid quenching to obtain brazing wires with high purity, good toughness, and good wettability, in the preparation technology of amorphous wires, how to achieve rapid and uniform cooling to maintain the amorphous structure and uniform and smooth wires is also one of the key challenges. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing titanium-based amorphous brazing wire in view of the deficiencies of the above-mentioned prior art. The method adopts a vacuum single-roller rapid quenching method, combines strict control of process parameters, guides the magnetic field intensity, and realizes fine control of the melt movement trajectory, thereby preparing titanium-based amorphous brazing wire with high purity, good toughness, and good wettability, solving the problem that titanium alloys have poor processing performance and are difficult to prepare into foil or wire.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for preparing a titanium-based amorphous brazing wire, characterized in that the method comprises the following steps:

[0006] Step 1: Place the high-purity metal raw materials corresponding to the target product into a water-cooled copper crucible in a vacuum arc melting furnace and evacuate the furnace to 3×10 -3 Pa, and then high-purity argon gas is filled to -0.05MPa, and the high-purity metal raw material is smelted 4 times to obtain a master alloy ingot with uniform composition;

[0007] Step 2: placing the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjusting the distance between the nozzle of the induction melting crucible and the copper roller;

[0008] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0009] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and at the same time, the copper roller starts to rotate. When the master alloy ingot is in a molten state and reaches the set temperature, and the copper roller reaches the set speed, adjust the direction and strength of the magnetic field generator below the nozzle, and fill the induction melting crucible with high-purity argon gas through the belt-swinging inflation valve to form a pressure difference between the inside and outside of the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and is rapidly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0010] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the mass purity of the high-purity metal raw material in step 1 is greater than 99.9%. By limiting the mass purity of the high-purity metal raw material, it is avoided that the impurity content in the raw material is too high to reduce the amorphous forming ability of the brazing wire and cause the brazing wire to become brittle, thereby ensuring the amorphous forming ability of the product titanium-based amorphous brazing wire.

[0011] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the induction melting crucible described in step 2 is a high-purity quartz tube, a cylindrical nozzle is provided at the bottom, and the central circular hole diameter of the cylindrical nozzle is 0.3mm-0.5mm, and the height is 7mm-12mm. By limiting the diameter of the central circular hole of the nozzle, it is avoided that the nozzle opening is too large to cause the master alloy ingot to flow by itself after melting, and the nozzle opening is too small to cause the wire to form discontinuously or even unable to be ejected; at the same time, since the temperature of the melt will decrease to a certain extent when it flows through the nozzle, by limiting the length of the nozzle, it is avoided that the nozzle is too long to cause the fluidity to be poor after the melt temperature is reduced, and the nozzle is too short to cause the melt to be ejected unevenly, thereby affecting the quality of the titanium-based amorphous brazing wire.

[0012] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that in step 2, the distance between the nozzle of the induction melting crucible and the copper roller is adjusted to 0.5 mm to 1.5 mm. By limiting the distance between the nozzle of the crucible and the copper roller, it is avoided that the distance between the nozzle of the crucible and the copper roller is too large, so that the shape of the molten pool is uncontrollable and the brazing wire is uneven, and the distance between the nozzle of the crucible and the copper roller is too small, so that the crucible is heated and expanded, scratching the copper roller.

[0013] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the amount of the master alloy ingot added in step 2 is to ensure that the liquid level of the melt formed by melting the master alloy ingot in step 4 is 1 / 4 to 1 / 3 of the height of the induction melting crucible. The amount of the master alloy ingot added to the induction melting crucible will affect the strip-spinning temperature. By controlling the amount of the master alloy ingot added, it is avoided that there is too much raw material in the crucible, so that the molten liquid at the bottom of the crucible is greatly affected by gravity, and it naturally flows out under its own weight before reaching the strip-spinning temperature, affecting the continuity and uniformity of the brazing wire. At the same time, it is avoided that there is too little raw material in the crucible, resulting in a small output of each batch of brazing wires, affecting the preparation efficiency.

[0014] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the power increase rate of the induction power supply during the heating process of the master alloy ingot in step 4 is 0.5kW / min, and the maximum power is maintained at 4kW to 7kW. By controlling the power increase rate, it is avoided that the induction melting crucible is cracked due to excessive heating.

[0015] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the set temperature of the master alloy ingot in step 4 is 1100°C to 1300°C, and the set speed of the copper roller is 2000r / min to 3000r / min. By selecting the temperature of 300°C to 400°C above the melting point of the alloy corresponding to the brazing wire for wire spinning, it is avoided that the melt temperature of the master alloy ingot is too high and the viscosity coefficient is reduced, resulting in burrs, discontinuity and other phenomena in the brazing wire, and the melt temperature of the master alloy ingot is too low to solidify and block at the nozzle, resulting in wire spinning failure, or insufficient cooling speed, resulting in difficulty in forming tough amorphous wire; at the same time, by controlling the set speed of the copper roller, it is avoided that the copper roller speed is too high to affect the stability of the molten pool between the nozzle and the copper roller, resulting in defects such as small holes and cracks in the brazing wire, and the copper roller speed is too low to affect the heat dissipation rate when the melt solidifies, resulting in crystallization and embrittlement of the wire.

[0016] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the strength of the magnetic field generator in step 4 is 10A / m to 15A / m, generating a magnetic field perpendicular to the direction of the strip. The present invention controls the strength and direction of the magnetic field generator, and under the combined action of the magnetic field force and the centrifugal force, the alloy melt moves at high speed along a specific path to achieve rapid cooling, thereby ensuring that the amorphous structure and surface of the brazing wire are uniform and smooth.

[0017] The above-mentioned method for preparing a titanium-based amorphous brazing wire is characterized in that the flow rate of high-purity argon gas filled into the belt-swinging inflation valve in step four is 6L / min to 14L / min. The flow rate of high-purity argon gas filled into the belt-swinging inflation valve affects the internal and external pressure difference of the crucible during belt-swinging: the greater the gas flow rate, the greater the pressure difference, the faster the melt is ejected, and the more melt is accumulated on the surface of the copper roller, and vice versa. By limiting the flow rate to 6L / min to 14L / min, it is possible to avoid excessive accumulation of melt due to excessive gas flow, reduced cooling rate, difficulty in forming complete amorphous, resulting in brittle brazing wire, and too little melt ejected due to too small gas flow rate, resulting in discontinuous brazing wire forming.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention melts the smelted master alloy ingot through induction melting and then sprays it onto a copper roller for rapid condensation, strictly controls process parameters and cooperates with a magnetic field, combines magnetofluidics with belt throwing, utilizes a magnetic field to generate a force on a conductive fluid, and achieves fine control of the movement trajectory of the melt. Titanium-based amorphous brazing wire is prepared by a vacuum single-roller rapid quenching method, and the titanium-based amorphous brazing wire has high purity, good toughness, and good wettability, and maintains an amorphous structure and a uniform and smooth surface, avoiding the complex processes of forging, rolling, heat treatment, drawing, and the like in the traditional process and the losses in the process, and has the advantages of saving processes and costs.

[0020] 2. The titanium-based amorphous brazing wire preparation method of the present invention is simple, has high preparation efficiency, and is suitable for mass production.

[0021] 3. The present invention significantly improves the preparation efficiency and performance of titanium-based amorphous brazing wire and reduces energy consumption and cost through the integration of magnetohydrodynamic technology.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a macroscopic morphology of the titanium-based amorphous brazing wire prepared in Example 1 of the present invention.

[0024] Figure 2 This is a picture of the titanium-based amorphous brazing wire prepared in Example 1 of the present invention after being folded 180 degrees.

[0025] Figure 3 This is the XRD spectrum of the titanium-based amorphous brazing wire prepared in Example 2 of the present invention.

[0026] Figure 4 This is a microscopic morphology of the titanium-based amorphous brazing wire prepared in Example 2 of the present invention.

[0027] Figure 5 This is a microscopic morphology of the titanium-based amorphous brazing wire prepared in Example 3 of the present invention. DETAILED DESCRIPTION

[0028] Example 1

[0029] This embodiment includes the following steps:

[0030] Step 1: High-purity metal raw materials including Ti, Zr, Cu, and Ni with a mass purity greater than 99.9% are mixed in a mass ratio of 37.5:37.5:15:10 and placed in a water-cooled copper crucible of a vacuum arc melting furnace. The furnace is evacuated to 3×10 -3 Pa, then fill with argon gas with a purity of 99.999% to -0.05MPa, and melt the high-purity metal raw material 4 times to obtain a master alloy ingot with uniform composition;

[0031] Step 2: Place the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjust the distance between the nozzle of the induction melting crucible and the copper roller to 1.5 mm; the induction melting crucible is a high-purity quartz tube, and a cylindrical nozzle is provided at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.3 mm and a height of 7 mm. The amount of the master alloy ingot placed should ensure that the liquid level of the melt formed by the melting of the master alloy ingot in step 4 is 1 / 3 of the height of the high-purity quartz tube;

[0032] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0033] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and the copper roller starts to rotate. During the heating process, the power increase rate of the induction power supply is 0.5kW / min, and remains unchanged after reaching 4kW. When the master alloy ingot is molten and reaches 1100°C, and the copper roller reaches 2000r / min, set the strength of the magnetic field generator under the nozzle to 12A / m, and the direction of the magnetic field is perpendicular to the direction of the belt throwing. Through the belt throwing inflation valve, argon with a purity of 99.999% is filled into the induction melting crucible at a flow rate of 6L / min, so that a pressure difference is formed inside and outside the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and quickly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0034] Figure 1 This is a macroscopic morphology picture of the titanium-based amorphous brazing wire prepared in this embodiment. After testing, the diameter of the titanium-based amorphous brazing wire is about 65 μm and the length is 3.2 m.

[0035] Figure 2This is a picture of the titanium-based amorphous brazing wire prepared in this example after being folded 180 degrees. Figure 2 It can be seen that the titanium-based amorphous brazing wire is not broken after being folded 180° and has good toughness.

[0036] Example 2

[0037] This embodiment includes the following steps:

[0038] Step 1: High-purity metal raw materials including Ti, Zr, Cu, and Ni with a mass purity greater than 99.9% are mixed in a mass ratio of 37.5:37.5:15:10 and placed in a water-cooled copper crucible of a vacuum arc melting furnace. The furnace is evacuated to 3×10 -3 Pa, then fill with argon gas with a purity of 99.999% to -0.05MPa, and melt the high-purity metal raw material 4 times to obtain a master alloy ingot with uniform composition;

[0039] Step 2: Place the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjust the distance between the nozzle of the induction melting crucible and the copper roller to 1 mm; the induction melting crucible is a high-purity quartz tube, and a cylindrical nozzle is provided at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.3 mm and a height of 7 mm. The amount of the master alloy ingot placed should ensure that the liquid level of the melt formed by the melting of the master alloy ingot in step 4 is 1 / 3 of the height of the high-purity quartz tube;

[0040] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0041] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and the copper roller starts to rotate. During the heating process, the power increase rate of the induction power supply is 0.5kW / min, and remains unchanged after reaching 5.5kW. When the master alloy ingot is molten and reaches 1200°C, and the copper roller reaches 2000r / min, the strength of the magnetic field generator under the nozzle is set to 10A / m, and the direction of the magnetic field is perpendicular to the direction of the belt throwing. Argon with a purity of 99.999% is filled into the induction melting crucible at a flow rate of 10L / min through the belt throwing inflation valve, so that a pressure difference is formed inside and outside the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and quickly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0042] Figure 3 is the XRD pattern of the titanium-based amorphous brazing wire prepared in this example, Figure 3 The typical bun peak in the graph indicates that the titanium-based amorphous brazing wire is amorphous.

[0043] Figure 4 This is the microscopic morphology of the titanium-based amorphous brazing wire prepared in this embodiment. Figure 4 It can be seen that the diameter of the titanium-based amorphous brazing wire is about 80 μm; further testing shows that the length of the titanium-based amorphous brazing wire is about 2.8 m, and has good toughness.

[0044] Example 3

[0045] This embodiment includes the following steps:

[0046] Step 1: High-purity metal raw materials including Ti, Zr, Cu, and Ni with a mass purity greater than 99.9% are mixed in a mass ratio of 37.5:37.5:15:10 and placed in a water-cooled copper crucible of a vacuum arc melting furnace. The furnace is evacuated to 3×10 -3 Pa, then fill with argon gas with a purity of 99.999% to -0.05MPa, and melt the high-purity metal raw material 4 times to obtain a master alloy ingot with uniform composition;

[0047] Step 2: Place the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjust the distance between the nozzle of the induction melting crucible and the copper roller to 1.2 mm; the induction melting crucible is a high-purity quartz tube, and a cylindrical nozzle is provided at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.4 mm and a height of 9 mm. The amount of the master alloy ingot placed should ensure that the liquid level of the melt formed by the melting of the master alloy ingot in step 4 is 1 / 3 of the height of the high-purity quartz tube;

[0048] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0049] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and the copper roller starts to rotate. During the heating process, the power increase rate of the induction power supply is 0.5kW / min, and remains unchanged after reaching 6kW. When the master alloy ingot is molten and reaches 1200°C, and the copper roller reaches 2500r / min, the strength of the magnetic field generator under the nozzle is set to 12A / m, and the direction of the magnetic field is perpendicular to the direction of the belt throwing. Argon with a purity of 99.999% is filled into the induction melting crucible at a flow rate of 8L / min through the belt throwing inflation valve, so that a pressure difference is formed inside and outside the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and quickly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0050] Figure 5 This is the microscopic morphology of the titanium-based amorphous brazing wire prepared in this embodiment. Figure 5It can be seen that the diameter of the titanium-based amorphous brazing wire is about 80 μm; further testing shows that the length of the titanium-based amorphous brazing wire is about 3 m, and has good toughness.

[0051] Example 4

[0052] This embodiment includes the following steps:

[0053] Step 1: High-purity metal raw materials including Ti, Zr, Cu, and Ni with a mass purity greater than 99.9% are mixed in a mass ratio of 37.5:37.5:15:10 and placed in a water-cooled copper crucible of a vacuum arc melting furnace. The furnace is evacuated to 3×10 -3 Pa, then fill with argon gas with a purity of 99.999% to -0.05MPa, and melt the high-purity metal raw material 4 times to obtain a master alloy ingot with uniform composition;

[0054] Step 2: Place the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjust the distance between the nozzle of the induction melting crucible and the copper roller to 0.7 mm; the induction melting crucible is a high-purity quartz tube, and a cylindrical nozzle is provided at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.4 mm and a height of 9 mm. The amount of the master alloy ingot placed should ensure that the liquid level of the melt formed by melting the master alloy ingot in step 4 is 1 / 4 of the height of the high-purity quartz tube;

[0055] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0056] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and the copper roller starts to rotate. During the heating process, the power increase rate of the induction power supply is 0.5kW / min, and remains unchanged after reaching 5kW. When the master alloy ingot is molten and reaches 1250°C, and the copper roller reaches 3000r / min, set the strength of the magnetic field generator under the nozzle to 10A / m, and the direction of the magnetic field is perpendicular to the direction of the belt throwing. Argon with a purity of 99.999% is filled into the induction melting crucible at a flow rate of 12L / min through the belt throwing inflation valve, so that a pressure difference is formed inside and outside the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and quickly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0057] Example 5

[0058] This embodiment includes the following steps:

[0059] Step 1: High-purity metal raw materials including Ti, Zr, Cu, and Ni with a purity greater than 99.9% are mixed in a mass ratio of 37.5:7.5:15:10 and placed in a water-cooled copper crucible in a vacuum arc melting furnace. The furnace is evacuated to 3×10 -3 Pa, then fill with argon gas with a purity of 99.999% to -0.05MPa, and melt the high-purity metal raw material 4 times to obtain a master alloy ingot with uniform composition;

[0060] Step 2: Place the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjust the distance between the nozzle of the induction melting crucible and the copper roller to 0.5 mm; the induction melting crucible is a high-purity quartz tube, and a cylindrical nozzle is provided at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.5 mm and a height of 12 mm. The amount of the master alloy ingot placed should ensure that the liquid level of the melt formed by melting the master alloy ingot in step 4 is 1 / 4 of the height of the high-purity quartz tube;

[0061] Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa;

[0062] Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and the copper roller starts to rotate. During the heating process, the power increase rate of the induction power supply is 0.5 kW / min, and remains unchanged after reaching 7 kW. When the master alloy ingot is molten and reaches 1300°C, and the copper roller reaches 3000r / min, set the strength of the magnetic field generator under the nozzle to 12A / m, and the direction of the magnetic field is perpendicular to the direction of the belt throwing. Through the belt throwing inflation valve, argon with a purity of 99.999% is filled into the induction melting crucible at a flow rate of 14L / min, so that a pressure difference is formed inside and outside the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and quickly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

[0063] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a titanium-based amorphous brazing wire, characterized in that: The method comprises the following steps: Step 1: Place the high-purity metal raw materials corresponding to the target product into a water-cooled copper crucible in a vacuum arc melting furnace and evacuate the furnace to 3×10 -3 Pa, and then high-purity argon gas is filled to -0.05MPa, and the high-purity metal raw material is smelted 4 times to obtain a master alloy ingot with uniform composition; Step 2: placing the master alloy ingot obtained in step 1 into the induction melting crucible of the vacuum belt spinning machine, and adjusting the distance between the nozzle of the induction melting crucible and the copper roller; Step 3: Close the door of the vacuum belt-spinning machine and evacuate the furnace to 3×10 -3 Pa, then fill with protective atmosphere high-purity argon gas until the pressure gauge shows -0.05MPa; Step 4: Turn on the induction power supply to heat the master alloy ingot in the induction melting crucible, and at the same time, the copper roller starts to rotate. When the master alloy ingot is in a molten state and reaches the set temperature, and the copper roller reaches the set speed, adjust the direction and strength of the magnetic field generator below the nozzle, and fill the induction melting crucible with high-purity argon gas through the belt-swinging inflation valve to form a pressure difference between the inside and outside of the induction melting crucible, so that the master alloy ingot melt is ejected from the nozzle at the bottom of the induction melting crucible, and is rapidly cooled on the surface of the rotating copper roller to form a titanium-based amorphous brazing wire.

2. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: The mass purity of the high-purity metal raw material in step 1 is greater than 99.9%.

3. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: The induction melting crucible in step 2 is a high-purity quartz tube with a cylindrical nozzle at the bottom, and the central circular hole of the cylindrical nozzle has a diameter of 0.3 mm to 0.5 mm and a height of 7 mm to 12 mm.

4. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: In step 2, the distance between the nozzle of the induction melting crucible and the copper roller is adjusted to 0.5 mm to 1.5 mm.

5. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: The amount of the master alloy ingot added in step 2 is to ensure that the liquid level of the melt formed by melting the master alloy ingot in step 4 is 1 / 4 to 1 / 3 of the height of the induction melting crucible.

6. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: During the heating process of the master alloy ingot in step 4, the power increase rate of the induction power supply is 0.5 kW / min, and the maximum power is maintained at 4 kW to 7 kW.

7. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: In step 4, the set temperature of the master alloy ingot is 1100° C. to 1300° C., and the set speed of the copper roller is 2000 r / min to 3000 r / min.

8. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: The intensity of the magnetic field generator in step 4 is 10A / m to 15A / m, generating a magnetic field perpendicular to the belt-swinging direction.

9. The method for preparing a titanium-based amorphous brazing wire according to claim 1, characterized in that: The flow rate of high-purity argon gas filled into the belt-swinging inflation valve in step 4 is 6L / min to 14L / min.

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