Methods for improving wear resistance of alloy surface

Abstract

A method for improving the wear resistance of an alloy surface, belonging to the field of alloy surface treatment, comprises: placing an alloy having a boriding agent layer on its surface in a vacuum environment, heating it to a preset temperature, and performing a boriding treatment while maintaining the preset temperature and pressure; wherein the alloy contains a transition metal element, the preset pressure is 30MPa-60MPa, and the preset temperature is 950°C-1200°C. By subjecting the alloy and the boriding agent layer to boriding treatment at high temperature and high pressure, the wear resistance of the alloy surface can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of alloy surface treatment, and in particular to a method for improving the wear resistance of an alloy surface. Background Art

[0002] Improving the wear resistance of metal alloys can extend the life of friction and wear components, such as aircraft turbine blades and artificial joint implants. Generally, increasing a material's surface hardness improves its wear resistance. However, increasing hardness often reduces its toughness, leading to subsurface cracks during repeated wear, resulting in fatigue fracture and reduced wear resistance.

[0003] Therefore, how to effectively improve the wear resistance of the alloy surface is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a method for improving the wear resistance of an alloy surface, which can increase the hardness of the alloy surface without substantially affecting the toughness inside the alloy, thereby effectively improving the wear resistance of the alloy surface.

[0005] The embodiment of the present application is implemented as follows:

[0006] This application example provides a method for improving the wear resistance of an alloy surface, which comprises the following steps:

[0007] The alloy with the boronizing agent layer on the surface is placed in a vacuum environment, heated to a preset temperature, and subjected to boronization treatment under the conditions of maintaining the preset temperature and preset pressure;

[0008] The alloy contains transition metal elements, the preset pressure is 30MPa-60MPa, and the preset temperature is 950℃-1200℃.

[0009] The method for improving the wear resistance of the alloy surface provided in the present application, by reacting the alloy with a boriding agent layer under high temperature and high pressure, not only can the boron element penetrate into the metal crystal structure to form a variety of metal borides on the alloy surface, and effectively improve the wear resistance of the alloy by compounding a variety of metal borides, but also can effectively refine the alloy grains, making the alloy grain size more uniform to improve the surface hardness and wear resistance of the alloy, and at the same time, the wear-resistant layer forms a layered structure on the sub-surface, further improving the wear resistance of the alloy without affecting the toughness inside the alloy.

[0010] In some embodiments, the preset temperature is 950°C-1100°C.

[0011] In some embodiments, the boronization treatment time is 5 min to 60 min.

[0012] In some embodiments, the boronization treatment time is 10 min-20 min.

[0013] In some embodiments, the step of increasing the temperature includes:

[0014] First, the temperature is raised to 600°C at a heating rate of 80°C / min-110°C / min and a heating time of 5.5-6.5min;

[0015] Then, the temperature was raised to 900°C at a heating rate of 80°C / min-120°C / min and a heating time of 2.5-3.8 min;

[0016] Finally, the temperature is raised to the preset temperature at a heating rate of 40°C / min-80°C / min and a heating time of 2-4 minutes.

[0017] In some embodiments, the boronizing agent layer includes a boronizing agent, and the boronizing agent includes one or more of powdered B4C, BN, and amorphous boron.

[0018] In some embodiments, the boriding agent layer is composed of powdered amorphous boron.

[0019] In some embodiments, the alloy includes a medium entropy alloy of an FCC phase, a Kappa phase, and a V2O3 phase, and the Kappa phase has a chemical formula of (Co, Ni)3V.

[0020] In some embodiments, the thickness of the boronizing agent layer is ≥ 1 mm.

[0021] In some embodiments, the particle size of the boronizing agent is ≤ 1 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 XRD patterns of the VCoNi medium-entropy alloy before and after boronization treatment in Example 1 of the present application;

[0024] Figure 2 This is a schematic diagram of the performance of an alloy sample having a wear-resistant layer on its surface obtained after boronization treatment according to Example 1 of the present application;

[0025] Figure 3 This is a schematic diagram showing a comparison of wear between Example 1 and Comparative Example 1 of the present application;

[0026] Figure 4 This is a comparative diagram of the hardness tests of Examples 1-4 and Comparative Example 1 of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the examples, but it will be understood by those skilled in the art that the following examples are merely illustrative of the present application and should not be considered as limiting the scope of the present application. In the examples, if specific conditions are not specified, the conditions are carried out according to conventional conditions or manufacturer recommendations. The reagents or instruments used are not specified by the manufacturer and are conventional products that can be purchased commercially.

[0028] The following is a detailed description of the method for improving the wear resistance of the alloy surface according to the embodiment of the present application:

[0029] The present application provides a method for improving the wear resistance of an alloy surface, which comprises the following steps:

[0030] The alloy with the boronizing agent layer on the surface is placed in a vacuum environment, heated to a preset temperature, and subjected to boronization treatment under the conditions of maintaining the preset temperature and preset pressure;

[0031] The alloy contains transition metal elements, the preset pressure is 30MPa-60MPa, and the preset temperature is 950℃-1200℃.

[0032] It is understood that the boronizing agent layer is used to provide boron element.

[0033] The vacuum environment avoids interfering impurities during the boronization process.

[0034] The transition metal elements are used to react with the boron element in the boriding agent layer under high temperature and high pressure conditions, thereby generating a wear-resistant layer containing boride on its surface through boriding treatment, thereby greatly enhancing the hardness and wear resistance of the alloy surface. The hardness of the wear-resistant layer decreases from the outside to the inside with increasing depth from the surface. Therefore, the toughness of the alloy will not be significantly reduced while increasing the wear resistance of the alloy surface.

[0035] Boriding treatment is carried out under the condition of a preset temperature of 950℃-1200℃. The alloy surface can be recrystallized and the alloy grains can be refined through heat treatment, which plays a role in grain refinement and strengthening, thereby effectively improving the hardness and wear resistance of the alloy.

[0036] Exemplarily, the preset temperature is any value of 950°C, 975°C, 1000°C, 1025°C, 1050°C, 1075°C, 1100°C, 1125°C, 1150°C, 1175°C, 1200°C or between any two values.

[0037] The preset pressure used in the controlled boriding treatment is 30MPa-60MPa. By applying pressure to the surface, the residual compressive stress on the alloy surface is increased, causing local plastic deformation around the grain boundaries, thereby further promoting grain refinement and reducing the grain size, thereby effectively improving the hardness and wear resistance of the alloy.

[0038] Exemplarily, the preset pressure is any value among 30 MPa, 35 MPa, 40 MPa, 45 MPa, 50 MPa, 55 MPa, 60 MPa, or between any two values.

[0039] The boronization treatment can be performed in a furnace that meets the above-mentioned high temperature, high pressure and vacuum environment. For example, the boronization treatment can be performed in an SPS plasma spark sintering furnace.

[0040] In summary, the present application adopts the above-mentioned method, by reacting the alloy with the boriding agent layer under high temperature and high pressure, which not only enables the boron element to penetrate into the metal crystal structure and form a variety of metal borides on the alloy surface, but also effectively improves the wear resistance of the alloy through the compounding of multiple metal borides, and can effectively refine the alloy grains, making the alloy grain size more uniform to improve the surface hardness and wear resistance of the alloy. At the same time, the wear-resistant layer forms a layered structure on the sub-surface, further improving the wear resistance of the alloy without affecting the toughness inside the alloy.

[0041] In some optional embodiments, the preset temperature is 950°C-1100°C.

[0042] Controlling the preset temperature of the boronization treatment within the above range is beneficial to improving the wear resistance of the alloy.

[0043] Exemplarily, the preset temperature is any value among 950° C., 1000° C., 1050° C., 1100° C., or between any two values.

[0044] The time of the boronization treatment is greater than 0. Since the thickness of the wear-resistant layer is related to the time of the boronization treatment, the time of the boronization treatment can be selected according to actual needs.

[0045] In some optional embodiments, the boronization treatment time is 5 min-60 min.

[0046] Within the above-mentioned boronization treatment time range, the thickness of the obtained wear-resistant layer is good and meets most usage requirements.

[0047] Illustratively, the time of the boronization treatment is any value among 5 min, 10 min, 20 min, 30 min, 40 min, 50 min, 60 min, or between any two values.

[0048] Optionally, the boronization treatment time is 10 min-20 min.

[0049] Within the above time range, the thickness of the obtained wear-resistant layer can be greater than 100 μm, and the wear-resistant effect is good.

[0050] Exemplarily, the time of the boronization treatment is any value among 10 min, 13 min, 15 min, 18 min, 20 min, or between any two values.

[0051] In some optional embodiments, the step of heating includes:

[0052] First, the temperature is raised to 600°C at a heating rate of 80°C / min-110°C / min and a heating time of 5.5-6.5min;

[0053] Then, the temperature was raised to 900°C at a heating rate of 80°C / min-120°C / min and a heating time of 2.5-3.8 min;

[0054] Finally, the temperature is raised to the preset temperature at a heating rate of 40°C / min-80°C / min and a heating time of 2-4 minutes.

[0055] Heating rate refers to the rate at which the alloy temperature increases from the initial temperature to the preset temperature.

[0056] The above three-step heating method is beneficial to improving the diffusion uniformity of boron atoms.

[0057] For example, the temperature is first raised to 600° C. at a heating rate of 80° C. / min-110° C. / min and a heating time of 6 min;

[0058] Then, the temperature was raised to 900°C at a heating rate of 80°C / min-120°C / min and a heating time of 3 min;

[0059] Finally, the temperature was raised to the preset temperature at a heating rate of 40°C / min-80°C / min and a heating time of 2 min.

[0060] It should be noted that in the three heating stages in this application, the heating rate of each heating stage remains constant, so in actual operation, it is only necessary to determine the temperature difference before and after heating and limit the heating time.

[0061] It should be noted that the boronizing agent layer includes but is not limited to a boronizing agent, and may also include an activator such as KBF4, which can be selected according to actual needs.

[0062] In some optional embodiments, the boronizing agent layer includes a boronizing agent, and the boronizing agent includes one or more of powdered B4C, BN, and amorphous boron.

[0063] The above-mentioned boronizing agents can all be used to boronize the surface of the alloy to improve the hardness and wear resistance of the alloy surface.

[0064] In some optional embodiments, the boronizing agent layer is composed of powdered amorphous boron.

[0065] That is, the boriding agent layer is composed only of amorphous boron. By selecting the boriding agent layer to be composed of powdered amorphous boron, it is beneficial to avoid interference from foreign phases and to improve the hardness and wear resistance of the alloy surface.

[0066] The alloy containing a transition metal element means that the alloy is an alloy composed of the above-mentioned transition metal element, or an alloy composed of the above-mentioned transition metal element and a non-transition metal element.

[0067] The transition metal elements include but are not limited to one or more of Fe, Co, Ni, Mg, Al, Cu, Zn, Ti, Zr, Ta, Nb, W, Cr, V and Mn.

[0068] In recent years, medium-entropy alloys, as an important branch of high-entropy alloys, have attracted widespread attention in the field of materials science. Compared with traditional alloys and high-entropy alloys, medium-entropy alloys have more flexible elemental composition and easier to control alloy design. VCoNi isoatomic ratio multi-principal alloys are materials with application prospects due to their excellent mechanical properties, corrosion resistance and high-temperature stability, such as aviation turbine blades. However, the wear resistance of this alloy is currently close to that of traditional titanium alloys such as Ti6Al4V alloy, so the wear resistance needs to be improved, which limits the application of this alloy.

[0069] In some optional embodiments, the alloy includes a medium-entropy alloy of FCC phase, Kappa phase and V2O3 phase, and the chemical formula of the Kappa phase is (Co, Ni)3V.

[0070] The medium-entropy alloy exhibits excellent mechanical properties, corrosion resistance, and high-temperature stability, and has broad application prospects. Modifying the medium-entropy alloy in the aforementioned manner can refine the alloy grains while making them more uniform, allowing the precipitation of a V-rich phase and the formation of a gradient of metal boride compounds (such as cobalt boride and nickel boride), thereby improving the alloy's wear resistance and further expanding its application prospects.

[0071] In some optional embodiments, the thickness of the boronizing agent layer is ≥1 mm.

[0072] Controlling the thickness within the above range is beneficial to providing sufficient boron atoms for boronization treatment.

[0073] Optionally, the thickness of the boronizing agent layer is 1 mm-1 cm.

[0074] In some optional embodiments, the particle size of the boronizing agent is ≤1 μm.

[0075] Controlling the particle size of the boronizing agent to ≤1μm is beneficial to ensuring the uniformity of the boronizing agent layer.

[0076] The method for improving the wear resistance of the alloy surface of the present application is further described in detail below with reference to the embodiments.

[0077] The VCoNi medium entropy alloy is prepared by the following method:

[0078] Weighed V, Co, and Ni elemental powders were mixed and placed in a cemented carbide can, wherein the atomic percentage of V, Co, and Ni was 1:1:1. The purity of each elemental V, Co, and Ni elemental powder was greater than 99.9%, and the particle size of each elemental V, Co, and Ni elemental powder was 8 μm.

[0079] The metal was placed in an arc melting furnace and arc-melted for 10 minutes under argon protection to form an alloy. To achieve uniform alloying elements, the metal was remelted five times to obtain a VCoNi medium-entropy alloy consisting of FCC, Kappa, and V2O3 phases. The Kappa phase has the chemical formula (Co, Ni)3V.

[0080] The VCoNi medium entropy alloy was cut into 2 mm thick sheet samples, and then polished until there were no obvious scratches on the surface to obtain cast VCoNi medium entropy alloy samples (hereinafter referred to as VCoNi alloy or VCoNi) for implementing the following examples and comparative examples.

[0081] Example 1

[0082] Amorphous boron powder with a purity of 99% and a particle size of ≤1 μm produced by Beijing Bailingwei Technology Co., Ltd. was evenly spread on the surface of the alloy sample to form a boronizing agent layer with a thickness of 1 mm.

[0083] A VCoNi alloy sample with a boriding agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 1000°C with a heating time of 2 minutes, and then kept at 1000°C and a pressure of 50 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface (denoted as boriding 1000 / 10).

[0084] Figure 1 The XRD patterns of the VCoNi medium entropy alloy before and after boronization treatment in Example 1 of the present application are shown in FIG. Figure 1It can be seen that the VCoNi alloy is a single FCC phase before boriding. After boriding, hard boride phases such as Co4B are formed on the alloy surface, indicating that a boriding reaction has occurred on the surface of the alloy sample, forming metal borides. After boriding, a wear-resistant layer is formed on the surface of the alloy sample, which is beneficial to improving the wear resistance of the alloy.

[0085] Figure 2 This is a schematic diagram of the performance of the alloy sample with a wear-resistant layer on the surface obtained after boronization treatment in Example 1. Figure 2 Part (a) shows the cross-sectional SEM image, and part (b) shows the hardness change before and after boronization treatment.

[0086] according to Figure 2 Part (a) shows that the wear-resistant layer (boronized layer + compact layer + ceramic layer formed on the surface of the compact layer) is approximately 100 μm deep (the matrix in the figure represents the VCoNi medium-entropy alloy). It also shows that the wear-resistant layer is stratified and that the boronized layer contains a large number of very fine precipitates. Part (b) shows the hardness data of the wear-resistant layer and the matrix. It can be seen that after the boronization treatment described in Example 1, the surface hardness of the alloy reaches 21.5 GPa (average value). Surface boronization can significantly improve the surface hardness of the alloy.

[0087] Example 2

[0088] The only difference between it and Example 1 is:

[0089] A VCoNi alloy sample with a boriding agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 1000°C with a heating time of 2 minutes, and then kept at 1000°C and a pressure of 50 MPa for 5 minutes to obtain an alloy sample with a wear-resistant layer on the surface (denoted as boriding 1000 / 5).

[0090] Example 3

[0091] The only difference between it and Example 1 is:

[0092] A VCoNi alloy sample with a boriding agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 1100°C with a heating time of 2 minutes, and then kept at 1100°C and a pressure of 50 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface (denoted as borided 1100 / 10).

[0093] Example 4

[0094] The only difference between it and Example 1 is:

[0095] A VCoNi alloy sample with a boriding agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 1100°C with a heating time of 2 minutes, and then kept at 1100°C and a pressure of 50 MPa for 5 minutes to obtain an alloy sample with a wear-resistant layer on the surface (denoted as borided 1100 / 5).

[0096] Example 5

[0097] A VCoNi alloy sample with a boronizing agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 1200°C with a heating time of 2 minutes, and then kept at 1200°C and a pressure of 50 MPa for 5 minutes to obtain an alloy sample with a wear-resistant layer on the surface.

[0098] Example 6

[0099] The only difference between it and Example 1 is:

[0100] A VCoNi alloy sample with a boronizing agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 900°C with a heating time of 3 minutes; finally raised to 950°C with a heating time of 2 minutes, and then kept at 950°C and a pressure of 50 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface.

[0101] Example 7

[0102] The only difference between it and Example 1 is:

[0103] A VCoNi alloy sample with a boronizing agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 1000°C with a heating time of 3 minutes; finally raised to 1000°C with a heating time of 2 minutes, and then kept at 1000°C and a pressure of 60 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface.

[0104] Example 8

[0105] The only difference between it and Example 1 is:

[0106] A VCoNi alloy sample with a boronizing agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 1000°C with a heating time of 3 minutes; finally raised to 1000°C with a heating time of 2 minutes, and then kept at 1000°C and a pressure of 40 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface.

[0107] Example 9

[0108] The only difference between it and Example 1 is:

[0109] A VCoNi alloy sample with a boronizing agent layer on the surface was placed in an SPS-211LX spark plasma sintering furnace, and the temperature of the VCoNi alloy sample was first raised to 600°C with a heating time of 6 minutes; then raised to 1000°C with a heating time of 3 minutes; finally raised to 1000°C with a heating time of 2 minutes, and then kept at 1000°C and a pressure of 30 MPa for 10 minutes to obtain an alloy sample with a wear-resistant layer on the surface.

[0110] Comparative Example 1

[0111] The VCoNi medium entropy alloy sample prepared above was directly used as the alloy sample of Comparative Example 1 (denoted as unborated / VCoNi before boronization / VCoNi RT).

[0112] Test Example 1

[0113] The VCoNi alloy sample after boronization treatment in Example 1 and the VCoNi alloy sample before boronization treatment in Comparative Example 1 were subjected to circular (radius of 2 mm) sliding friction and wear tests on Anton Paar THT-800 high-temperature friction and wear testing machine. Ball-disc dry sliding wear was adopted, and the grinding material was a Φ6 mm silicon nitride ceramic ball. The wear test was carried out in an atmospheric environment (relative humidity of about 70%) at room temperature (about 25°C), with a friction sliding speed of 0.1 m / s, a load of 5 N, and a sliding distance of 1000 m (about 53,000 laps). After the experiment, the friction coefficient curve was recorded; and a 3D profilometer was used to measure the wear track morphology, and the wear rate was calculated based on the wear volume. The results are shown as follows. Figure 3 shown.

[0114] Figure 3 This is a schematic diagram of the wear comparison between Example 1 and Comparative Example 1, where Figure 3 Parts (a), (b) and (c) represent comparative example 1, and parts (d), (e) and (f) represent example 1. Figure 3 Parts (a) and (d) show the friction and wear curves of the VCoNi alloy material before and after boriding treatment, (b) and (e) respectively show the overall picture of the wear track, and (c) and (f) are the 3D contours of the wear track before and after boriding treatment, respectively.

[0115] according to Figure 3 It can be seen that the wear rate of Example 1 is significantly reduced by the above-mentioned boronization treatment compared with the alloy of Comparative Example 1 which is not subjected to the boronization treatment, which means that the above-mentioned boronization treatment can effectively improve the wear resistance of the alloy surface.

[0116] The above operation was performed on the above Examples 2-9. Although the wear rates varied, they were all lower than those of the alloy in Comparative Example 1 which was not subjected to boronization treatment. This indicates that the above boronization treatment can effectively improve the wear resistance of the alloy surface.

[0117] Test Example 2

[0118] Hardness comparison charts and average hardness data of the VCoNi alloy samples after boronization treatment in Test Examples 1-4 and the VCoNi alloy sample before boronization treatment in Comparative Example 1, where SD represents variance.

[0119] The results are as follows Figure 4 As shown, according to Figure 4 It can be seen that the average hardness of Examples 1-4 is greater than that of Comparative Example 1.

[0120] In summary, the method for improving the wear resistance of the alloy surface provided in the present application can not only allow the boron element to penetrate into the metal crystal structure and form a variety of metal borides on the alloy surface, and effectively improve the wear resistance of the alloy by compounding a variety of metal borides, but also can effectively refine the alloy grains, making the alloy grain size more uniform to improve the surface hardness and wear resistance of the alloy. At the same time, the wear-resistant layer forms a layered structure on the sub-surface, which does not affect the toughness inside the alloy and can further improve the wear resistance of the alloy.

[0121] The foregoing description is merely a specific embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for improving the wear resistance of an alloy surface, characterized in that: The following steps are involved: The alloy with the boronizing agent layer on the surface is placed in a vacuum environment, heated to a preset temperature, and subjected to boronization treatment under the conditions of maintaining the preset temperature and preset pressure; Wherein, the alloy contains transition metal elements, the preset pressure is 30MPa-60MPa, and the preset temperature is 950°C-1200°C.

2. The method for improving the wear resistance of an alloy surface according to claim 1, wherein: The preset temperature is 950°C-1100°C.

3. The method for improving the wear resistance of an alloy surface according to claim 1, wherein: The time of the boronization treatment is 5 min to 60 min.

4. The method for improving the wear resistance of an alloy surface according to claim 1, wherein: The time of the boronization treatment is 10 min-20 min.

5. The method for improving the wear resistance of an alloy surface according to claim 1, wherein: The step of heating up comprises: First, the temperature is raised to 600°C at a heating rate of 80°C / min-110°C / min and a heating time of 5.5-6.5min; Then, the temperature was raised to 900°C at a heating rate of 80°C / min-120°C / min and a heating time of 2.5-3.8 min; Finally, the temperature is raised to the preset temperature at a heating rate of 40°C / min-80°C / min and a heating time of 2-4 minutes.

6. The method for improving the wear resistance of an alloy surface according to any one of claims 1 to 5, characterized in that: The boronizing agent layer includes a boronizing agent, and the boronizing agent includes one or more of powdered B4C, BN, and amorphous boron.

7. The method for improving the wear resistance of an alloy surface according to any one of claims 1 to 5, characterized in that: The boronizing agent layer is composed of powdered amorphous boron.

8. The method for improving the wear resistance of an alloy surface according to any one of claims 1 to 5, characterized in that: The alloy includes a medium-entropy alloy of an FCC phase, a Kappa phase and a V2O3 phase, and the chemical formula of the Kappa phase is (Co, Ni)3V.

9. The method for improving the wear resistance of an alloy surface according to any one of claims 1 to 5, characterized in that: The thickness of the boronizing agent layer is ≥1 mm.

10. The method for improving the wear resistance of an alloy surface according to any one of claims 1 to 5, characterized in that: The particle size of the boronizing agent is ≤1 μm.

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