A high-entropy alloy material and a preparation method thereof

Abstract

The application provides a high-entropy alloy material and a preparation method thereof, and the high-entropy alloy material has a structural formula as follows: (CoCrFeNiMo 0.2 ) 100‑x Si x ; wherein x = 0, 5, 10, 15. The high-entropy alloy material has excellent strength and toughness, and the mechanical properties are greatly optimized, and the hardness and compressive yield strength are significantly increased. In addition, the addition of Si improves the self-corrosion potential and charge transfer resistance of the high-entropy alloy material, reduces the self-corrosion current density, increases the stability in the solution, and improves the corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, in particular to a high-entropy alloy material and a preparation method thereof. BACKGROUND

[0002] High-entropy alloys (HEA) are alloys formed by five or more than five equal or approximately equal amounts of metals. High-entropy alloys are a new type of alloy that has developed rapidly in recent years, which has some excellent properties that traditional alloys cannot match, such as high hardness and wear resistance, high-temperature stability, excellent corrosion resistance and oxidation resistance, and has good development prospects.

[0003] The atomic radii and electronegativities of Co, Cr, Fe and Ni are similar, and they are more likely to form a simple single face-centered cubic structure (FCC), so the CoCrFeNi high-entropy alloy has good plasticity, and the plastic elongation can reach more than 60%, but the strength and hardness of the alloy are low, thereby limiting its actual engineering application space. SUMMARY

[0004] The purpose of the present application is to provide a high-entropy alloy material and a preparation method thereof, so as to solve the technical problem of low strength and hardness of the CoCrFeNi high-entropy alloy in the prior art.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows:

[0006] A high-entropy alloy material has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x = 0, 5, 10, 15.

[0007] The present application also provides a preparation method of a high-entropy alloy material, comprising the following steps:

[0008] Co, Cr, Fe, Ni, Mo and Si are taken according to the proportion, and are subjected to melting and casting, so as to obtain a high-entropy alloy material; the high-entropy alloy material has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x = 0, 5, 10, 15.

[0009] Preferably, the melting is heating to melting, and the vacuum degree of the melting is 5x10 -5 Pa.

[0010] Preferably, the melting is performed for multiple times, and each time is followed by standing for 8-12 minutes.

[0011] Preferably, the smelting is six times, and each time is placed for 10 minutes after melting.

[0012] Preferably, the smelting adopts a vacuum suspension smelting furnace.

[0013] Preferably, the vacuum degree of the cast is 5*10 -5 Pa.

[0014] Preferably, the preparation method of the high-entropy alloy material further comprises a step of homogenizing treatment on the high-entropy alloy material obtained after casting.

[0015] Preferably, the homogenizing treatment is placed for 24h at 1200℃.

[0016] Preferably, the preparation method of the high-entropy alloy material further comprises a step of polishing and cleaning the obtained high-entropy alloy material.

[0017] The above scheme of the present application at least includes the following beneficial effects:

[0018] (1) The high-entropy alloy material of the present application has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x=0, 5, 10, 15. By adjusting the composition of the alloy, adding metal or non-metal elements, fine grain strengthening, solid solution strengthening, eutectic structure strengthening, second phase strengthening, etc. can occur in the high-entropy alloy, so as to obtain excellent strength and toughness matching. Silicon as a reinforcing element can promote the formation of body-centered cubic structure and silicon-rich compound phase with higher hardness in the high-entropy alloy. With the addition of Si, the morphology of the FCC phase changes from single polygonal equiaxed crystal to dendritic FCC, BCC and silicon-containing compound phase, so that the mechanical properties of the obtained high-entropy alloy are greatly optimized, and the hardness and compressive yield strength are significantly increased. Among them, the compressive yield strength of the high-entropy alloy material (CoCrFeNiMo 0.2 ) 90 Si 10 can reach 338MPa, and the strain at break is 49%, with excellent strength and toughness matching. In addition, the addition of Si improves the self-corrosion potential and charge transfer resistance of the high-entropy alloy material, reduces the self-corrosion current density, increases the stability in solution, and improves the corrosion resistance.

[0019] (2) The preparation method of the high-entropy alloy material of the present application comprises the following steps: taking Co, Cr, Fe, Ni, Mo and Si according to the proportion, smelting and casting to obtain a high-entropy alloy material, and placing the high-entropy alloy material at 1200℃ for 24h for homogenizing treatment. The preparation method of the high-entropy alloy material obtains a high-entropy alloy material with uniform composition, without defects such as slag inclusion and segregation. Attached Figure Description

[0020] Figure 1 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x XRD diffraction pattern;

[0021] Figure 2 It is an alloy CoCrFeNiMo 0.2 Metallographic structure image;

[0022] Figure 3 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x Scanning electron microscope images of (x = 0, 5, 10, 15);

[0023] Figure 4 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x The curves showing the change in hardness as Si content for (x=0,5,10,15);

[0024] Figure 5 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x (x=0,5,10,15) Stress-strain curves for compression engineering at room temperature;

[0025] Figure 6 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x Electrochemical polarization curves in a 3.5% NaCl corrosion solution;

[0026] Figure 7 The high-entropy alloy material (CoCrFeNiMo) of this invention 0.2 ) 100-x Si x Electrochemical impedance spectroscopy;

[0027] Figure 8 This is for Figure 7 The graph shows the variation of the fitted Rct value with Si content. Detailed Implementation

[0028] Exemplary embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0029] It should be noted that, in the examples, the specific conditions are not specified, and the conventional conditions or the conditions recommended by the manufacturer are used. The reagents or instruments used are not specified by the manufacturer, and are conventional products that can be purchased on the market.

[0030] Example 1

[0031] The high-entropy alloy material of the present embodiment has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x = 10; that is, the high-entropy alloy material is (CoCrFeNiMo 0.2 ) 90 Si 10 .

[0032] The (CoCrFeNiMo 0.2 ) 90 Si 10 of the present embodiment has the following atomic percentage of each component:

[0033] Co: 20.9-21.9 at%, Cr: 20.9-21.9 at%, Fe: 20.9-21.9 at%, Ni: 20.9-21.9 at%, Mo: 4.2-4.4 at%, Si: 9.5-10.5 at%, and the sum of the atomic percentages of each component is 100 at%.

[0034] The preparation method of the high-entropy alloy material of the present embodiment comprises the following steps:

[0035] Co, Cr, Fe, Ni, Mo, and Si are taken in the specified proportions, and are subjected to melting and casting to obtain the high-entropy alloy material.

[0036] It should be noted that the specifications of the Co, Cr, Fe, Ni, Mo, and Si can be selected by the person skilled in the art according to the actual situation. In the present embodiment, the Co, Cr, Fe, Ni, Mo, and Si are selected to be elemental raw materials with a purity of 99.9% or higher; wherein the Co, Cr, Fe, and Ni are metal particles with a particle size of 3 mm.

[0037] As a specific implementation of the present embodiment, the preparation method of the high-entropy alloy material specifically comprises the following steps:

[0038] Co, Cr, Fe, Ni, Mo, Si are taken according to the proportion, vacuum suspension melting furnace is used for melting, the melting is heated to melt, the vacuum degree of the melting is 5x10 -5 Pa, the melting is six times, and each melting is placed for 10 minutes.

[0039] The alloy obtained after melting is melted by using a stainless steel casting equipment, the vacuum degree of the melting is 5x10 - 5 Pa, to obtain a high-entropy alloy material;

[0040] The high-entropy alloy material obtained after melting is placed at 1200℃ for 24h for homogenization treatment, then polished to remove the oxide layer, and then placed in an ultrasonic cleaning instrument for ethanol shock cleaning to remove surface oil stains.

[0041] Example 2

[0042] The high-entropy alloy material of the present embodiment has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x=0; that is, the high-entropy alloy material is (CoCrFeNiMo 0.2 ) 100 Si0.

[0043] The preparation method of the high-entropy alloy material of the present embodiment is the same as that in Example 1.

[0044] Example 3

[0045] The high-entropy alloy material of the present embodiment has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x=5; that is, the high-entropy alloy material is (CoCrFeNiMo 0.2 ) 95 Si5.

[0046] The preparation method of the high-entropy alloy material of the present embodiment is the same as that in Example 1.

[0047] Example 4

[0048] The high-entropy alloy material of the present embodiment has the following structural formula: (CoCrFeNiMo 0.2 ) 100-x Si x ; wherein x=15; that is, the high-entropy alloy material is (CoCrFeNiMo 0.2 )85 Si 15 .

[0049] The preparation method of the high-entropy alloy material in the embodiment is the same as that in Embodiment 1.

[0050] Embodiment 5

[0051] The high-entropy alloy material in the embodiment is the same as that in Embodiment 1, and the only difference is that the preparation method of the high-entropy alloy material comprises the following steps:

[0052] Co, Cr, Fe, Ni, Mo and Si are taken according to the proportion, and vacuum suspension melting furnace is used for melting, the melting is heating to melting, the vacuum degree of the melting is 5x10 -5 Pa, the melting is six times, and each melting is placed for 10 minutes.

[0053] The alloy obtained after melting is melted by using stainless steel casting equipment, the vacuum degree of the melting is 5x10 - 5 Pa, and the high-entropy alloy material is obtained.

[0054] The high-entropy alloy material obtained after melting is placed at 1200℃ for 24h for homogenization treatment.

[0055] Embodiment 6

[0056] The high-entropy alloy material in the embodiment is the same as that in Embodiment 1, and the only difference is that the preparation method of the high-entropy alloy material comprises the following steps:

[0057] Co, Cr, Fe, Ni, Mo and Si are taken according to the proportion, and vacuum suspension melting furnace is used for melting, the melting is heating to melting, the vacuum degree of the melting is 5x10 -5 Pa, the melting is six times, and each melting is placed for 10 minutes.

[0058] The alloy obtained after melting is melted, the vacuum degree of the melting is 5x10 -5 Pa, and the high-entropy alloy material is obtained.

[0059] Effect Comparative Example

[0060] In order to verify the technical effect of the high-entropy alloy material, the following test is carried out:

[0061] (1) X-ray diffraction (XRD) test and phase composition analysis

[0062] The high-entropy alloy material described in Examples 1-4 was used to cut the required sample using a wire EDM machine. The sample was then polished step by step using 400#, 800#, 1000#, 1500#, and 2000# sandpaper. After polishing, the sample was rinsed with alcohol and dried to obtain a smooth and flat surface for XRD analysis. The scanning angle 2θ ranged from 20 to 80°, and the scanning speed was 20° / min.

[0063] The test results are as follows:

[0064] Figure 1 High-entropy alloy material (CoCrFeNiMo) 0.2 ) 100-x Si x The XRD diffraction pattern. (From...) Figure 1 It can be seen that the Si0 high-entropy alloy has a simple single-phase FCC phase structure; the addition of Si introduces a new BCC phase into the high-entropy alloy matrix in addition to the FCC phase. With increasing Si content, the FCC diffraction peak weakens, while the BCC diffraction peak appears and gradually strengthens. Simultaneously, the silicon-containing compound M3Si is formed. When the Si content is Si... 15 At that time, the FCC phase was less abundant, and the crystal structure was dominated by the BCC phase and some silicides. This indicates that with the addition of Si, the phase structure of the high-entropy alloy became more complex, and in addition to the FCC phase, there were also BCC phase and silicide phase.

[0065] Figure 2 The alloy is CoCrFeNiMo 0.2 Metallographic structure image. (By...) Figure 2 It can be seen that CoCrFeNiMo 0.2 The high-entropy alloy has a simple microstructure, consisting of single polygonal equiaxed grains. Combined with XRD analysis, it can be seen that the microstructure is a single FCC phase.

[0066] (2) Organizational observation and analysis

[0067] The high-entropy alloy materials described in Examples 1-4 were used to cut out the required test samples using a wire EDM machine. The samples were then inlaid with bakelite powder and progressively polished using 400#, 800#, 1000#, 1500#, and 2000# sandpaper. After polishing, the samples were rinsed with alcohol, and the surface was etched with aqua regia. The etched samples were then observed using an Axio Scope A1 Zeiss microscope and a JSM-6510LA scanning electron microscope, and micro-area composition analysis was performed using EDS.

[0068] The test results are as follows:

[0069] The elemental composition (atomic percentage at%) of different regions of the high-entropy alloy materials in Examples 1, 3, and 4 is as follows:

[0070]

[0071] Figure 3 The high-entropy alloy material (CoCrFeNiMo 0.2 ) 100-x Si x The scanning electron microscope images of the high-entropy alloy materials (CoCrFeNiMo Figure 3 It can be seen that long strip-shaped grain boundaries appear in the Si5 high-entropy alloy structure, and many fine and dispersed particles appear in the crystal. According to the element composition of different regions of the high-entropy alloy materials in Examples 1, 3 and 4, it is found that the grain boundaries are rich in Cr, Mo and Si elements, and the Si content is as high as 17.54 at.%. The silicides are gathered at the grain boundaries, and another part of the silicides is dispersed in the crystal as fine particles of the second phase, with a Si content of 12.07 at.%. The alloy elements are uniformly distributed in the matrix. With the further increase of the Si content, when the Si content is Si 10 , the fine and dispersed particles gather and grow to form dendrites. The dendrites are rich in Cr, Mo and Si elements, and the Si content is 18.38 at.%. The element distribution in the dendrite region is basically the same as that of Si5. When the Si content reaches Si 15 , the elements gather in large quantities between the dendrites to form (Cr, Mo)3Si compounds. The dendrites further grow, the area of the interdendritic region increases, and a gray new phase is precipitated at the grain boundaries of the coarse dendrites. The gray phase is rich in Ni and Si elements. The mixing enthalpy between Si and other elements is relatively negative, which is beneficial to the aggregation and combination of other elements, thereby promoting the formation of intermetallic silicide phases.

[0072] (3) Alloy hardness test

[0073] The high-entropy alloy materials in Examples 1-4 are cut into round rods of a certain length, then inlaid, and after rough grinding with 100# sandpaper, the sample surface is ground flat and polished with silicon carbide sandpaper of different particle sizes (in the order of 400#, 800#, 1000# and 1500#). A Vickers microhardness tester is used to measure the hardness of the alloy. The selected load is 200g, the load holding time is 15s, and the hardness value is read after unloading. Ten groups of hardness values are measured and recorded for each sample, and the average value is calculated.

[0074] The test results are as follows:

[0075] Figure 4 The high-entropy alloy material (CoCrFeNiMo 0.2 ) 100-x Si x The hardness of the high-entropy alloy materials (CoCrFeNiMo Figure 4It can be seen that the hardness value of Si0 alloy is relatively low, at 166 HV; as the Si content increases, the hardness of the alloy continuously increases, with the hardness value of Si5 alloy increasing to 235 HV; the hardness value of Si10 alloy is 364 HV; when the Si content reaches Si 15 At this point, the hardness value reaches 615 HV. This is because, when x ≤ 5, the alloy is mainly composed of face-centered cubic (FCC) crystals; when x ≥ 10, the FCC crystals gradually transform into body-centered cubic (BCC) crystals. BCC has a more stable crystal structure than FCC. Furthermore, Si atoms replace other atoms in the lattice, thus increasing the number of mismatched atoms. Si atoms have a larger atomic size difference compared to other atoms, resulting in increased lattice distortion, hindering dislocation movement, and thus increasing hardness. Therefore, as the Si content increases, the hardness of the alloy also increases.

[0076] (4) Compression performance test

[0077] Take the high-entropy alloy material described in Examples 1-4, cut its ingot into cylinders of Φ5mm×10mm, and then grind the surface of the sample with silicon carbide sandpaper of different grits (in the order of 400#, 800#, 1000#, and 1500#). After cleaning and drying, perform compression performance testing on a KRYAW-300C pressure testing machine with a compression rate of 0.001mm / s.

[0078] The test results are as follows:

[0079] Figure 5 High-entropy alloy material (CoCrFeNiMo) 0.2 ) 100-x Si x (x=0,5,10,15) Stress-strain curves for compression engineering at room temperature. Figure 5 It can be seen that (CoCrFeNiMo) 0.2 ) 100-x Si x (x=0,5,10,15) The compressive yield strength of the high-entropy alloy gradually increases with increasing Si content. With Si0, the compressive yield strength is 152 MPa, which is relatively low, but it exhibits good plasticity; it does not fracture even at 75% compressive strain. After adding Si, the compressive yield strength of the Si5 alloy is significantly improved to 287 MPa. At this point, the alloy still does not fracture even at 75% strain, demonstrating excellent plasticity. When the Si content is further increased to Si... 10 At this point, the compressive yield strength is 338 MPa, and the material fractures at 49% strain with a fracture strength of 1362 MPa, exhibiting good strength and plasticity; Si 15When Si content reaches Si5, the yield strength of the alloy is 360 MPa, and the strain at break is only 9%, and the plasticity is greatly reduced. Combined with the XRD results and microstructure analysis, this is because with the increase of Si element, the FCC phase decreases, the BCC phase gradually increases, and the silicide appears, thereby the yield strength of the material increases. When Si5, the fine silicide is dispersedly distributed in the intracrystalline and grain boundary, which plays a role of dispersion strengthening for the alloy, so that the yield strength of Si5 alloy increases while still maintaining excellent plasticity. When Si 10 When Si content reaches Si5, the yield strength of the alloy is 360 MPa, and the strain at break is only 9%, and the plasticity is greatly reduced. Combined with the XRD results and microstructure analysis, this is because with the increase of Si element, the FCC phase decreases, the BCC phase gradually increases, and the silicide appears, thereby the yield strength of the material increases. When Si5, the fine silicide is dispersedly distributed in the intracrystalline and grain boundary, which plays a role of dispersion strengthening for the alloy, so that the yield strength of Si5 alloy increases while still maintaining excellent plasticity. When Si 15 When Si content reaches Si5, the yield strength of the alloy is 360 MPa, and the strain at break is only 9%, and the plasticity is greatly reduced. Combined with the XRD results and microstructure analysis, this is because with the increase of Si element, the FCC phase decreases, the BCC phase gradually increases, and the silicide appears, thereby the yield strength of the material increases. When Si5, the fine silicide is dispersedly distributed in the intracrystalline and grain boundary, which plays a role of dispersion strengthening for the alloy, so that the yield strength of Si5 alloy increases while still maintaining excellent plasticity. When Si

[0080] (5) Corrosion resistance test

[0081] The high-entropy alloy materials in Examples 1-4 are taken and processed into samples of 10mmx10mmx2mm, and then the surface of the sample is ground and polished with different grits of silicon carbide sandpaper (in the order of 400#, 800#, 1000#, and 1500#), washed, and then connected with copper wires by soldering, and packaged with epoxy resin, with a bare area of 1cm 2 . The electrochemical corrosion performance of the sample in 3.5% NaCl solution is tested by using a DH7003-2 type electrochemical workstation, and a three-electrode system is adopted, the sample is the working electrode, the auxiliary electrode is platinum electrode, and the reference electrode is saturated calomel electrode. Before measurement, the sample is immersed in 3.5wt% NaCl solution for 20 minutes, and then the open circuit voltage is stabilized, and the sample is subjected to dynamic potential polarization curve scanning and electrochemical impedance test. The electrochemical polarization curve test scanning range is-1.0V-1.5V, and the scanning rate is 2mv / S; the electrochemical impedance test frequency range is 10 5 HZ-10 -2 HZ, and the experimental parameters are fitted by using ZSimDemo software.

[0082] Figure 6 The high-entropy alloy material (CoCrFeNiMo 0.2 ) 100-x Si x The electrochemical polarization curve in 3.5% NaCl corrosion solution. From Figure 6It can be seen that with the addition of Si, the self-corrosion potential shifts in the positive direction, and the passivation range of the alloy increases significantly. The addition of Si is beneficial to the active release of Cr, thereby forming a Cr2O3 protective film on the alloy surface and improving the passivation performance of the alloy. The Si0 alloy has the lowest self-corrosion potential, which is -441 mV, and the self-corrosion current density is 1.79 μA·cm. -2 With the addition of Si, the self-corrosion potential of the alloy gradually increases, the self-corrosion current density decreases, and the corrosion resistance of the alloy is improved.

[0083] Figure 7 High-entropy alloy material (CoCrFeNiMo) 0.2 ) 100-x Si x Electrochemical impedance spectroscopy. (By...) Figure 7 Further analysis of the corrosion resistance of high-entropy alloys reveals, as shown in section 7, that (CoCrFeNiMo) 0.2 ) 100-x Si x High-entropy alloys have a single capacitive arc. With the addition of Si, the radius of the capacitive arc gradually increases. The corresponding fitting circuit is mainly based on single activation control. The equivalent circuit Rs(QRct) can be used to simulate the impedance data of high-entropy alloys.

[0084] Figure 8 for Figure 7 The graph shows the variation of the fitted Rct value with Si content; where Rs represents the solution resistance, Q is the interface capacitance, and Rct represents the charge transfer resistance. Figure 8 It can be seen that when the Si content is below Si10, the charge transfer resistance Rct is relatively stable and does not change significantly. When the Si content increases to Si10, the charge transfer resistance Rct becomes relatively stable. 15 At that time, the charge transfer resistance Rct increased rapidly, increasing by 10. 19 The order of magnitude of the change makes charge transfer on the alloy surface difficult, increasing the alloy's stability in solution and improving its corrosion resistance.

[0085] In summary, the high-entropy alloy material (CoCrFeNiMo) of this invention... 0.2 ) 100-x Si x High-purity materials are selected and precisely weighed according to a molar ratio, then melted under vacuum conditions. The alloy ingot is then homogenized at 1200℃ for 24 hours to obtain (CoCrFeNiMo). 0.2 ) 100-x Si x High-entropy alloy materials. CoCrFeNiMo 0.2The high-entropy alloy with X=0 is in FCC single-phase structure, the grains are single polygonal equiaxed grains, no fracture occurs when the compression deformation strain reaches 75%, and the alloy has good plasticity, but the compression yield strength is low, only 152 MPa. 0.2 ) 100-x Si x The high-entropy alloys with X=5, 10 and 15 contain FCC phase, BCC phase and silicide phase, with the addition of Si, the yield strength of the alloys is significantly increased, but the plasticity is reduced, the self-corrosion potential of the alloys is increased, the self-corrosion current density is reduced, the charge transfer resistance is increased, the stability of the alloys in solution is increased, and the corrosion resistance is improved. The obtained (CoCrFeNiMo 0.2 ) 90 Si 10 The high-entropy alloy has excellent strength and toughness, the compression yield strength is 338 MPa, and the strain at fracture is 49%, at this time, the atomic percentage of each component is: Co: 20.9-21.9 at%, Cr: 20.9-21.9 at%, Fe: 20.9-21.9 at%, Ni: 20.9-21.9 at%, Mo: 4.2-4.4 at%, Si: 9.5-10.5 at%, and the total of the atomic percentage of each component is 100 at%.

[0086] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A high-entropy alloy material, characterized in that, It has the following structural formula: (CoCrFeNiMo) 0.2 ) 100-x Si x Where x = 15; The preparation method of the high-entropy alloy material includes the following steps: Co, Cr, Fe, Ni, Mo, and Si are selected according to the specified ratio, and then smelted, cast, and homogenized to obtain a high-entropy alloy material. The homogenization process involves placing the sample at 1200°C for 24 hours.

2. The high-entropy alloy material according to claim 1, characterized in that, The melting process involves heating to a point of melting, and the vacuum degree of the melting process is 5 × 10⁻⁶. -5 Pa.

3. The high-entropy alloy material according to claim 2, characterized in that, The melting process is repeated multiple times, with each melting process followed by a standing period of 8-12 minutes.

4. The high-entropy alloy material according to claim 3, characterized in that, The melting process is carried out in six stages, with each melting stage followed by a 10-minute settling period.

5. The high-entropy alloy material according to claim 1, characterized in that, The smelting process employs a vacuum suspension smelting furnace.

6. The high-entropy alloy material according to claim 1, characterized in that, The vacuum degree of the melting and casting is 5×10. -5 Pa.

7. The high-entropy alloy material according to claim 1, characterized in that, It also includes the steps of grinding and cleaning the obtained high-entropy alloy material.

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