Electromagnetic suspension device and preparation method for ultrahigh-temperature alloy

Abstract

The electromagnetic suspension device comprises a working cavity, an induction coil and a laser output device, the induction coil is arranged in the working cavity and connected with an alternating power supply, a coil inner cavity of the induction coil is used for containing the ultrahigh-temperature alloy, and the laser output device is arranged in the working cavity. The transmitting path of the laser output device corresponds to the coil inner cavity, the induction coil can excite an alloy sample placed in the coil inner cavity to generate induction eddy current after being connected with alternating current, the Joule effect generated by the induction eddy current can enable the sample to be heated continuously, and laser emitted by the laser output device can provide an extra heat source for the alloy sample. And meanwhile, the induction coil can enable the inside of the alloy sample in a molten state to generate an electromagnetic stirring phenomenon, so that the structure uniformity of the alloy sample is effectively improved, the generation of defects such as shrinkage cavities, cracks, air holes and segregation is effectively inhibited, and the technical effect of optimizing the material performance is further achieved.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting, and in particular to an electromagnetic suspension device of a super-high temperature alloy and a preparation method thereof. Background Art

[0002] With the development of science and technology, the demand for ultra-high temperature alloys in aerospace, shipbuilding, military and nuclear industries continues to expand. Among them, ultra-high temperature alloys represented by W, Re, Ta, Mo, Nb and other alloys generally have a melting point higher than 2000℃ and high hardness, which makes it difficult to use traditional smelting processing methods.

[0003] Since the highest heating temperature of some heating methods in the prior art can only reach 2000℃, it is impossible to melt superalloys. Therefore, arc melting, powder metallurgy and other methods are currently mainly used for the preparation of ultra-high temperature alloys. Among them, the arc melting method uses the high heat generated by the arc discharge between the electrode and the smelting material to melt and prepare the alloy, but this method is prone to component segregation, affecting the service performance of the alloy; the powder metallurgy method realizes alloy preparation by low-temperature sintering, but the pores inside the powder metallurgy sample cannot be completely eliminated, which greatly reduces the mechanical properties, wear resistance and corrosion resistance of the alloy; and the fluidity of the solid is worse than that of the liquid, and it is difficult to prepare large-sized samples by powder metallurgy. The above factors greatly limit the industrial application of ultra-high temperature alloys.

[0004] Therefore, there is an urgent need for an electromagnetic suspension device and a preparation method for ultra-high temperature alloys that can optimize material properties. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an electromagnetic suspension device for ultra-high temperature alloys, in which the laser output by the induction coil and the laser output device jointly provide the heat required for melting the alloy sample. At the same time, the induction coil can electromagnetically stir the molten alloy sample, thereby achieving the technical effect of optimizing material properties.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] An electromagnetic suspension device of a super-high temperature alloy, comprising:

[0008] A working chamber, wherein the working chamber is used for processing ultra-high temperature alloys;

[0009] An induction coil, wherein the induction coil is disposed inside the working cavity, the induction coil is connected to an alternating power supply, and an inner cavity of the induction coil is used to contain an ultrahigh temperature alloy;

[0010] A laser output device, wherein the emission path of the laser output device is arranged corresponding to the inner cavity of the coil;

[0011] A water cooling component, wherein the water cooling component and the laser output device are arranged on both sides of the induction coil in a corresponding manner, and an emission path of the laser output device is arranged in a corresponding manner to the water cooling component;

[0012] A three-axis motion mechanism is connected to the laser output device.

[0013] Preferably, the water cooling component is a water cooling tank, which is connected to a water supply device. The water cooling tank is arranged below the induction coil to absorb excess laser energy and realize the reception and forming of the alloy sample. The laser output device is arranged above the induction coil.

[0014] Preferably, it further comprises a sample conveying mechanism, the sample conveying mechanism extends into the working chamber, the size of the sample conveying mechanism is smaller than the size of the coil inner cavity, and the size of the sample conveying mechanism is smaller than the size of the opening of the coil inner cavity.

[0015] Preferably, it further comprises an air blowing mechanism, wherein the air blowing mechanism is connected to an inert gas source, and an air blowing port of the air blowing mechanism is arranged corresponding to the coil inner cavity of the induction coil.

[0016] Preferably, a light-transmitting baffle is further included, the laser output device is arranged above the working cavity, a light-transmitting window is arranged on the upper part of the working cavity, and the light-transmitting baffle is arranged between the laser output device and the induction coil.

[0017] Preferably, it further comprises a baffle, wherein the baffle covers the lower surface of the light-transmitting window and is hinged to the inner wall of the working cavity.

[0018] Preferably, the induction coil includes a first winding and a second winding, the first winding is located below the second winding, the number of coil turns of the first winding is greater than the number of coil turns of the second winding, the direction of current in the first winding is opposite to the direction of current in the second winding, the first winding can provide an upward Lorentz force for the suspended ultra-high temperature alloy, and the second winding can provide a downward Lorentz force for the suspended ultra-high temperature alloy.

[0019] A method for preparing an ultrahigh temperature alloy, using the above-mentioned electromagnetic suspension device for the ultrahigh temperature alloy, comprises the following steps:

[0020] S1: placing the ultra-high temperature alloy sample into the coil cavity of the induction coil and energizing the induction coil;

[0021] S2: Turn on the laser output;

[0022] S3: After the ultra-high temperature alloy sample is melted, the laser output device and the AC power supply are turned off;

[0023] S4: Collect or process alloy samples.

[0024] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0025] In the electromagnetic suspension device of the ultra-high temperature alloy disclosed in the present invention, the induction coil can excite the alloy sample placed in the inner cavity of the coil to generate induced eddy current after the alternating current is connected. The Joule effect generated by the induced eddy current itself will cause the sample to continue to heat up. The laser emitted by the laser output device can provide an additional heat source for the alloy sample to reach the melting temperature required by the alloy sample. At the same time, the induction coil can cause electromagnetic stirring inside the molten alloy sample, effectively improving the uniformity of the alloy sample's structure, and effectively inhibiting the generation of defects such as shrinkage cavities, cracks, pores and segregation, thereby achieving the technical effect of optimizing material properties.

[0026] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0027] 1. The present invention uses electromagnetic suspension technology to achieve electromagnetic suspension of ultra-high temperature alloys. Laser heating coupled with electromagnetic heating is used to heat the suspended melt to above 3000°C to meet the experimental requirements of ultra-high temperature alloys. Compared with a single electromagnetic suspension device, the maximum experimental temperature is increased by more than 1000°C, overcoming the shortcoming that the original electromagnetic suspension device cannot achieve the preparation of ultra-high temperature alloys.

[0028] 2. The laser output device in the present invention is independently controlled, easy to use, and applicable to a wide range of alloys. The present invention can not only complete the electromagnetic suspension experiment of ultra-high temperature alloys under the condition of coupled laser heating, but also meet the electromagnetic suspension experiment requirements of medium and low temperature alloys without releasing the laser heat source.

[0029] 3. The three-axis motion mechanism in the present invention can fully regulate the position and size of the laser spot by adjusting the horizontal and vertical positions of the laser output device, thereby achieving uniform heating of alloy samples of different sizes, effectively reducing the gasification and volatilization caused by local concentration of energy. This device can achieve 3-12mm spot diameter regulation and complete the electromagnetic suspension preparation of alloy samples with a diameter of 3-20mm, which can meet the experimental requirements of high melting point and large size at the same time.

[0030] 4. The present invention can achieve the effect of reducing the deposition of volatilization generated by overheating of the melt in the light-transmitting window and the working cavity during the experiment. The baffle plate arranged below the light-transmitting window can reduce the deposition of volatilization generated by overheating of the melt in the light-transmitting window during the electromagnetic suspension experiment of low-temperature alloys; the light-transmitting baffle plate placed above the suspended alloy can reduce the volatilization deposition of the melt on the inner wall of the working cavity. The above measures can effectively ensure the laser heating effect and extend the service life of the light-transmitting window.

[0031] 5. The light-transmitting window in the present invention adopts highly durable anti-reflective quartz glass, which has high and stable optical transmittance to the laser wavelength, can effectively reduce the loss of laser energy and ensure the laser heating efficiency.

[0032] 6. The water cooling components in the present invention are designed in various types, which can realize multiple functions such as absorbing laser energy to protect the experimental device, collecting samples and processing the melt. Among them, the conical water cooling tank can reduce the reflection of the laser in the cavity and absorb the laser energy to the greatest extent. In addition, different shapes of forming water cooling tanks can be selected according to actual needs to realize the rapid processing and forming of the alloy melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Attached Figure 1 A schematic diagram of an embodiment of the present invention;

[0035] Attached Figure 2 A schematic diagram of a three-axis motion mechanism in an embodiment of the present invention;

[0036] Attached Figure 3 For attachment Figure 2 A side view schematic diagram of

[0037] Attached Figure 4 For attachment Figure 2 A top view schematic diagram of

[0038] Attached Figure 5 A cross-sectional schematic diagram of a collecting water cooling tank in an embodiment of the present invention;

[0039] Attached Figure 6 It is a cross-sectional schematic diagram of a collecting water cooling tank in another embodiment of the present invention;

[0040] Attached Figure 7 It is a cross-sectional schematic diagram of a formed water cooling tank in one embodiment of the present invention;

[0041] Attached Figure 8 It is a cross-sectional schematic diagram of a formed water cooling tank in another embodiment of the present invention;

[0042] Attached Fig. 9 The heating-cooling temperature curve in the process of preparing WNbZr alloy in Example 1;

[0043] Attached Fig.10The SEM image of the microstructure of the WNbZr alloy prepared in Example 1.

[0044] Among them, 1. working cavity; 2. alternating power supply; 3. coil cavity; 4. laser output device; 5. water cooling component; 6. water supply device; 7. sample conveying mechanism; 8. blowing mechanism; 9. inert gas source; 10. light-transmitting baffle; 11. light-transmitting window; 12. baffle; 13. first winding; 14. second winding; 15. collecting trough; 16. lifting platform; 17. first slide; 18. first slider; 19. second slide; 20. second slider; 21. annular plate; 22. vacuum pump; 23. gate valve; 24. infrared thermometer; 25. high-speed CCD camera; 26. camera; 27. vacuum gauge; 28. laser generator; 29. ​​exhaust hole; 30. three-axis motion mechanism. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The purpose of the present invention is to provide an electromagnetic suspension device for ultrahigh temperature alloys. With the cooperation of an induction coil and a laser output device, an ultrahigh temperature alloy sample can be melted and the melted alloy sample can be electromagnetically stirred, thereby improving the performance of the produced material.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] refer to Figure 1-10The electromagnetic suspension device for ultrahigh temperature alloy disclosed in the embodiment of the present invention comprises: a working cavity 1, an induction coil and a laser output device 4, wherein the working cavity 1 is used to provide a processing space for processing ultrahigh temperature alloy, the induction coil is arranged inside the working cavity 1, the induction coil is connected to an alternating power supply 2, a coil cavity 3 is formed in the middle of the coiled induction coil, and an emission path of the laser output device 4 is arranged corresponding to the coil cavity 3 to ensure that the laser beam emitted by the laser output device 4 can irradiate the surface of the alloy sample in the coil cavity 3. During processing, the alloy sample of the ultrahigh temperature alloy is placed in the coil cavity 3, and an alternating current is provided to the induction coil by the alternating power supply 2. An alternating electromagnetic field is generated, thereby exciting the alloy sample placed in the coil cavity 3 to generate induced eddy currents. The Joule effect generated by the induced eddy currents will cause the temperature of the alloy sample to continue to rise. The laser output device 4 is turned on synchronously, and the laser emitted by the laser output device 4 is irradiated on the alloy sample, which can further increase the temperature of the alloy sample, thereby realizing the melting of the alloy sample. At the same time, under the influence of the alternating electromagnetic field, electromagnetic stirring will occur inside the melted liquid alloy sample, thereby effectively improving the uniformity of the organization, and effectively inhibiting the generation of defects such as shrinkage cavities, cracks, pores and segregation, so that the performance of the prepared material is effectively improved, and the technical effect of optimizing the material performance is achieved. Further, the induced eddy currents generated by the alloy sample form a Lorentz force under the action of the magnetic field, which can overcome the deadweight of the alloy sample, so that the alloy sample can be suspended in the coil cavity 3, avoiding the problem of contact between the alloy melt and the container wall, playing a role in eliminating heterogeneous nucleation, further optimizing the material performance, and at the same time, it can also achieve deep supercooling and extraordinary solidification of a larger volume of alloy melt.

[0049] As a preferred embodiment, it also includes a water cooling component 5, and the water cooling component 5 and the laser output device 4 are correspondingly arranged on both sides of the induction coil, and the emission path of the laser output device 4 is arranged corresponding to the water cooling component 5; when the alloy sample is not placed, the laser emitted by the laser output device 4 can directly irradiate the water cooling component 5, so when the alloy sample is heated, the excess laser energy can be transmitted in the direction of the water cooling component 5 and absorbed by the water cooling component 5.

[0050] As a preferred embodiment, the electromagnetic suspension device of the ultrahigh temperature alloy also includes a three-axis motion mechanism 30, which is connected to the laser output device 4; specifically, the three-axis motion mechanism 30 includes a lifting platform 16, a first slide groove 17 is arranged on the top of the lifting platform 16, a first slider 18 is slidably arranged in the first slide groove 17, a second slide groove 19 is arranged on the side of the first slider 18 away from the lifting platform 16, a second slider 20 is slidably arranged in the second slide groove 19, the opening directions of the first slide groove 17 and the second slide groove 19 are perpendicular, and the second slider 20 is connected to the laser output device 4; the position of the laser output device 4 can be adjusted by the three-axis motion mechanism 30 to adjust the irradiation position of the laser; it can be understood that a beam expander is arranged at the output end of the laser output device 4, therefore, the spot size of the laser irradiated onto the alloy sample can also be adjusted by lifting and lowering the lifting platform 16.

[0051] Preferably, the water cooling component 5 is a water cooling tank, which is connected to the water supply device 6. The water cooling tank is arranged below the induction coil, and the laser output device 4 is arranged above the induction coil. After the processing is completed, the AC power supply is turned off, and the solid alloy or alloy melt loses its suspension force and falls vertically into the collection tank 15 of the water cooling tank under the action of gravity. While absorbing excess laser energy, it can be directly used for sample recovery and melt processing and forming, thereby simplifying the structure of the device.

[0052] Furthermore, the water cooling tank is a water-cooled copper mold; and the water supply device is preferably a water cooler.

[0053] More preferably, an annular cavity is provided inside the water cooling tank, and the annular cavity is connected to an external water supply device 6. The water supply device 6 can circulate cooling water into the annular cavity to keep the water cooling tank at a constant temperature.

[0054] Furthermore, the diameter of the annular cavity is 120-250 mm.

[0055] As a preferred embodiment, the water cooling tank is divided into two categories, one is a collecting water cooling tank, and the other is a forming water cooling tank. Correspondingly, the collecting tank 15 of the collecting water cooling tank is cylindrical or conical, and the collecting tank 15 of the collecting water cooling tank is used to absorb excess laser energy and receive solid alloy samples, wherein the collecting tank 15 of the collecting water cooling tank is set to be conical, which is more conducive to reducing the reflection of the laser in the cavity and maximally absorbing the laser energy; the collecting tank 15 of the forming water cooling tank is irregular; here, the irregular shape at least includes a combination of a frustum-shaped upper part and a cylindrical lower part, and a combination of a frustum-shaped upper part and a conical lower part; the forming water cooling tank is designed with collecting tanks 15 of different shapes, which can make the melt falling into the collecting tank 15 directly cooled into the target shape, realizing the rapid forming of the alloy sample melt.

[0056] Furthermore, an exhaust hole 29 is provided at the lower part of the collecting tank 15 of the forming water-cooling tank, and the exhaust hole 29 is connected to the external environment of the collecting tank 15, so as to facilitate the exhaust of the air in the collecting tank 15 during the alloy forming process.

[0057] Preferably, two three-axis motion mechanisms 30 are provided, and the second sliders 20 of the two three-axis motion mechanisms 30 are connected to the laser output device 4 through the annular plate 21; preferably, the material of the annular plate 21 can be selected from various materials such as polypropylene, stainless steel and aluminum, with a thickness of 8-20mm.

[0058] As a preferred embodiment, the adjustment range of the three-axis motion mechanism 30 in the horizontal direction is 10-100 mm; preferably, the adjustment range of the three-axis motion mechanism 30 in the vertical direction is 10-400 mm, which can achieve an adjustment range of the laser spot diameter of 3-12 mm.

[0059] As another feasible solution, both the first slide groove 17 and the second slide groove 19 can be replaced by electric slide rails.

[0060] More preferably, the spot size is less than or equal to the diameter of the alloy sample to reduce energy loss during laser release and prevent laser irradiation of the device.

[0061] Furthermore, the laser output device 4 includes an indicating device, which can emit a light beam coaxial with the laser, and can determine the irradiation position of the laser by the light beam before the laser is turned on, so as to realize the pre-setting of the laser irradiation position; preferably, the light emitted by the indicating device is preferably red light.

[0062] As a preferred embodiment, it also includes a sample conveying mechanism 7, which extends into the working chamber 1. The size of the sample conveying mechanism 7 is smaller than the size of the coil cavity 3 and smaller than the size of the opening of the coil cavity 3. The alloy sample can be delivered into the coil cavity 3 through the conveying mechanism, and the relative position of the alloy sample in the coil cavity 3 can be adjusted.

[0063] Furthermore, the sample conveying mechanism 7 is arranged inside the working chamber 1; preferably, the sample conveying mechanism 7 is designed to be L-shaped, with a support rod at one end for supporting the alloy sample and a gear transmission design at the other end, which can realize the movement of the sample in the horizontal direction and the lifting in the vertical direction.

[0064] It is understandable that the sample conveying mechanism 7 may also be a manipulator capable of X, Y, and Z three-axis motion. The manipulator is a prior art and will not be described in detail here.

[0065] As a preferred embodiment, it also includes a blowing mechanism 8, which is connected to an inert gas source 9, in which a sufficient amount of inert gas is stored, and a blowing port of the blowing mechanism 8 is arranged corresponding to the coil cavity 3 of the induction coil; the blowing mechanism 8 can blow inert gas into the alloy sample in the coil cavity 3, and after the alloy sample is melted, the cooling rate of the alloy sample melt can be controlled by changing the gas type and flow rate blown by the blowing mechanism 8.

[0066] Preferably, the gas blown out by the blowing mechanism 8 is helium with a faster heat transfer rate.

[0067] Furthermore, the blowing mechanism 8 is an annular structure to ensure that the laser light emitted by the laser output device 4 can pass through the annular structure and irradiate the surface of the alloy sample.

[0068] More preferably, it also includes a light-transmitting baffle 10, which corresponds to the emission path of the laser output device 4; further, the laser output device 4 is arranged above the working cavity 1, and a light-transmitting window 11 is arranged on the upper part of the working cavity 1, and the light-transmitting baffle 10 is arranged between the laser output device 4 and the induction coil; the laser emitted by the laser output device 4 irradiates the alloy sample from top to bottom, and the energy at the top of the alloy sample is concentrated, the temperature is high, and volatilization is easy to occur. The light-transmitting baffle 10 directly above can make the volatilized alloy sample deposited on the light-transmitting baffle 10, thereby reducing the deposition of overheated melt at other positions inside the cavity.

[0069] It can be understood that the axis of the induction coil is arranged in the up-down direction, and the opening in the axis direction of the induction coil is much larger than the gap between adjacent coils. At this time, the laser emitted by the laser output device 4 can be better irradiated into the coil cavity 3.

[0070] Furthermore, the light-transmitting baffle 10 is a quartz glass baffle, which has excellent light transmittance, small absorption and scattering loss of laser wavelength, and can effectively reduce laser energy loss. At the same time, the quartz glass baffle can be replaced regularly and can be reused after cleaning.

[0071] Preferably, the light-transmitting window 11 is made of anti-reflective quartz glass, which has high and stable optical transmittance to the laser wavelength, can effectively reduce the loss of laser energy and ensure the laser heating efficiency.

[0072] As a preferred embodiment, the electromagnetic suspension device of the ultra-high temperature alloy also includes a baffle 12, which covers the lower surface of the light-transmitting window 11. The baffle 12 is hinged to the inner wall of the working chamber 1. The baffle 12 can block the light-transmitting window 11 during the electromagnetic suspension experiment without releasing the laser to prevent the superheated melt from volatilizing and depositing on the light-transmitting window 11.

[0073] Preferably, the baffle 12 is a stainless steel baffle 12, and more preferably, the baffle 12 is a pair of semicircular baffles 12 with a diameter of 50-100 mm.

[0074] More preferably, the baffle 12 is connected to a knob disposed outside the working chamber 1 through a hinge shaft, and the hinge shaft is rotatably connected to the side wall of the working chamber 1, and the state of the baffle 12 can be adjusted by rotating the knob.

[0075] As a preferred embodiment, the induction coil includes a first winding 13 and a second winding 14. The first winding 13 is located below the second winding 14, and the first winding 13 can provide an upward Lorentz force for the alloy sample. The second winding 14 is located above the first winding 13. The direction of current in the second winding 14 is opposite to that in the first winding 13, and can provide a downward Lorentz force for the alloy sample. Furthermore, the number of coil turns of the first winding 13 is greater than the number of coil turns of the second winding 14, that is, the Lorentz force provided by the first winding 13 is much greater than the Lorentz force provided by the second winding 14, so that the sample position is constrained by the cooperation of the first winding 13 and the second winding 14 to achieve stable suspension.

[0076] As a preferred embodiment, the electromagnetic suspension device for ultrahigh temperature alloys further includes a vacuum pump 22, which is connected to the working chamber 1, and the air in the working chamber 1 can be pumped out through the vacuum pump 22. Preferably, a gate valve 23 is provided between the vacuum pump 22 and the working chamber 1 for controlling the on-off state of the working chamber 1 and the vacuum pump 22.

[0077] As a preferred embodiment, the electromagnetic suspension device of the ultrahigh temperature alloy also includes an infrared thermometer 24, a high-speed CCD camera 25 and a camera 26. The infrared thermometer 24 is arranged on the side of the working chamber 1, and is used to obtain the temperature information in the working chamber 1. According to the melting points of different alloys, the infrared thermometer 24 with different temperature measurement ranges can achieve a temperature measurement range of 500-3300°C; the high-speed CCD camera 25 is arranged on the side of the working chamber 1, and the adjustment range of the acquisition speed of the high-speed CCD camera 25 is hundreds to tens of thousands of frames per second, which is used to collect image information during the melting and solidification process of the alloy sample; the camera 26 can collect real-time images of the alloy sample during suspension, avoiding harm to the staff during manual observation.

[0078] Furthermore, a vacuum gauge 27 is installed in the working chamber 1. Preferably, the monitoring range of the vacuum gauge 27 is 10 -4 -10 -6 Pa.

[0079] As a preferred embodiment, the electromagnetic suspension device of the ultrahigh temperature alloy also includes a laser generator 28 for generating laser, the laser output device 4 is connected to the laser generator 28 via an optical fiber, and the laser emitted by the laser generator 28 is transmitted to the laser output device 4 via the optical fiber to irradiate the working cavity chamber; more preferably, the laser generator 28 can adjust the power and release mode of the generated laser; further, the power range of the laser generator 28 is 100-4000W.

[0080] Preferably, the release mode of the laser includes a continuous mode and a pulse mode.

[0081] More preferably, the laser generator 28 can be a fiber laser or a YAG laser.

[0082] As a preferred embodiment, the water supply device 6 is also connected to the alternating power supply 2 , the vacuum pump 22 and the laser generator 28 to provide water cooling protection for the alternating power supply 2 , the vacuum pump 22 and the laser generator 28 .

[0083] Preferably, the working chamber 1 is a spherical chamber, and the diameter of the spherical chamber is 800-1000 mm.

[0084] More preferably, the power range of the alternating power source 2 is 6-30KW.

[0085] The present invention also discloses a method for preparing an ultrahigh temperature alloy, which uses the electromagnetic suspension device of the ultrahigh temperature alloy and comprises the following steps:

[0086] S1: placing the ultra-high temperature alloy sample into the coil cavity of the induction coil and energizing the induction coil;

[0087] S2: Turn on the laser output;

[0088] S3: After the ultra-high temperature alloy sample is melted, the laser output device and the power supply are turned off;

[0089] S4: Collect or process alloy samples.

[0090] More specifically, the preparation method of the ultrahigh temperature alloy can be divided into the following steps:

[0091] Step 1: Prepare alloy samples and provide the atmosphere required for the experiment.

[0092] The alloy sample is placed on the support rod of the sample conveying mechanism 7, and the alloy sample is conveyed to the center of the induction coil by the sample conveying mechanism 7; then the working chamber 1 is evacuated by the vacuum pump 22, and the vacuum level is monitored by the vacuum gauge 27 until it reaches 10 -4 -10 -6Pa; then close the gate valve 23, open the inert gas source 9 to fill the working chamber 1 with inert gas to an atmospheric pressure, repeat this process 3-6 times to ensure a stable internal atmosphere, the atmosphere is selected according to the experimental requirements of argon, nitrogen or a mixed gas.

[0093] Step 2: Laser coarse alignment.

[0094] The indicating device of the laser output device 4 is turned on, and the light emitted by the indicating device can pass through the beam expander. The height of the laser output device 4 is controlled by the three-axis motion mechanism 30 to adjust the size of the light spot irradiated by the indicating device, thereby indirectly completing the adjustment of the laser spot size so that the laser spot matches the size of the alloy sample. Then, the horizontal position of the laser output device 4 is adjusted by the three-axis motion mechanism 30 so that the light emitted by the indicating device is located at the center of the induction coil, and then the indicating device is turned off.

[0095] Step 3: Suspending the alloy sample.

[0096] Turn on the switch of the alternating power supply 2, and adjust the current to make the alloy sample stably suspended in the center of the induction coil; then remove the sample conveying mechanism 7, adjust the current to control the suspension position and temperature of the sample, and realize suspension heating of the alloy sample.

[0097] Step 4: Fine-tune the laser alignment.

[0098] The indicating device is turned on again, and the position of the laser output device 4 is finely adjusted using the three-axis motion mechanism 30 so that the light emitted by the indicating device irradiates the central area of ​​the top of the suspended alloy sample, and then the indicating device is turned off.

[0099] Step 5: Start the laser to melt the alloy sample.

[0100] After the operator puts on laser protective glasses, the laser generator 28 is started, and the laser power and release mode are adjusted through the laser control program to heat the alloy sample; the melting state of the alloy sample is determined by the temperature-time curve collected by the infrared thermometer 24 and the real-time image collected by the camera 26.

[0101] Step 6: Cool down by blowing air and collect alloy samples.

[0102] After the alloy sample is melted and overheated to a certain extent, the laser is turned off to cool the alloy; in addition, the gas flow rate can be controlled by the blowing mechanism 8 to further regulate the cooling rate of the alloy melt and obtain the deep supercooling state of the liquid sample. When the temperature of the alloy sample drops to the target temperature, the alternating power supply 2 is turned off to make the alloy sample lose its suspension force and fall into the collection tank 15 of the water cooling tank. The collection tank 15 of the water cooling tank is designed in various types to meet different needs such as receiving solid alloys and processing and forming of alloy melts. After the sample is cooled and solidified, the working chamber 1 is opened and the alloy sample is taken out.

[0103] Embodiment 1:

[0104] When preparing the alloy sample in step 1, the corresponding pure metal is accurately weighed according to the mass percentage of the WNbZr alloy, and the master alloy is prepared by arc melting under the protection of inert gas, with a mass of 3 g and a diameter of 8 mm.

[0105] More preferably, the preferred value of the vacuum level in step 2 is 3×10 -4 Pa; the inert gas is Ar gas; the number of repetitions is 3 times.

[0106] Furthermore, the size of the laser spot is 5 mm.

[0107] As a preferred embodiment, in step six, after the sample is melted and superheated by 100-300K, the laser is turned off to cool the alloy.

[0108] Preferably, step three and step four can be repeated multiple times until the target alloy sample is obtained.

[0109] Example 1 The heating-cooling temperature curve during the preparation of WNbZr alloy is as follows Fig. 9 shown.

[0110] The microstructure SEM image of the WNbZr alloy prepared in Example 1 is as follows: Fig.10 shown.

[0111] Of course, the above-mentioned electromagnetic suspension device of ultrahigh temperature alloy and the method for preparing ultrahigh temperature alloy are also applicable to the processing of non-ultrahigh temperature alloys.

[0112] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0113] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An electromagnetic suspension device for ultrahigh temperature alloy, characterized in that: include: A working chamber (1), wherein the working chamber (1) is used for processing ultrahigh temperature alloys; an induction coil, the induction coil being arranged inside the working cavity (1), the induction coil being connected to an alternating power source (2), and the coil inner cavity (3) of the induction coil being used to contain an ultrahigh temperature alloy; A laser output device (4), wherein an emission path of the laser output device (4) is arranged corresponding to the coil inner cavity (3); a water cooling component (5), wherein the water cooling component (5) and the laser output device (4) are arranged on both sides of the induction coil in a corresponding manner, and an emission path of the laser output device (4) is arranged in a corresponding manner to the water cooling component (5); A three-axis motion mechanism (30), wherein the three-axis motion mechanism (30) is connected to the laser output device (4).

2. The electromagnetic suspension device of super-high temperature alloy according to claim 1, characterized in that: The water cooling component (5) is a water cooling trough, which is connected to a water supply device (6). The water cooling trough is arranged below the induction coil and is used to absorb excess laser energy and realize the reception and forming of the alloy sample. The laser output device (4) is arranged above the induction coil.

3. The electromagnetic suspension device of super-high temperature alloy according to claim 1, characterized in that: It also comprises a sample conveying mechanism (7), the sample conveying mechanism (7) extends into the interior of the working chamber (1), the size of the sample conveying mechanism (7) is smaller than the size of the coil inner cavity (3), and the size of the sample conveying mechanism (7) is smaller than the size of the opening of the coil inner cavity (3).

4. The electromagnetic suspension device of super-high temperature alloy according to claim 1, characterized in that: It also comprises an air blowing mechanism (8), the air blowing mechanism (8) being connected to an inert gas source (9), and the air blowing port of the air blowing mechanism (8) being arranged corresponding to the coil inner cavity (3) of the induction coil.

5. The electromagnetic suspension device of super-high temperature alloy according to claim 1, characterized in that: It also comprises a light-transmitting baffle (10), the laser output device (4) is arranged above the working cavity (1), a light-transmitting window (11) is arranged on the upper part of the working cavity (1), and the light-transmitting baffle (10) is arranged between the laser output device (4) and the induction coil.

6. The electromagnetic suspension device of super-high temperature alloy according to claim 5, characterized in that: It also comprises a baffle (12), wherein the baffle (12) covers the lower surface of the light-transmitting window (11), and the baffle (12) is hinged to the inner wall of the working chamber (1).

7. The electromagnetic suspension device of super-high temperature alloy according to claim 1, characterized in that: The induction coil comprises a first winding (13) and a second winding (14); the first winding (13) is located below the second winding (14); the number of turns of the first winding (13) is greater than the number of turns of the second winding (14); the direction of current in the first winding (13) is opposite to the direction of current in the second winding (14); the first winding (13) can provide an upward Lorentz force for suspending the ultra-high temperature alloy; and the second winding (14) can provide a downward Lorentz force for suspending the ultra-high temperature alloy.

8. A method for preparing an ultrahigh temperature alloy, characterized in that: An electromagnetic suspension device using the ultrahigh temperature alloy according to any one of claims 1 to 7 comprises the following steps: S1: placing the ultra-high temperature alloy sample into the coil cavity of the induction coil and energizing the induction coil; S2: Turn on the laser output; S3: After the ultra-high temperature alloy sample is melted, the laser output device and the AC power supply are turned off; S4: Collect or process alloy samples.

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