A method for preparing a rare earth element-doped tungsten alloy coating

Abstract

The present application relates to the technical field of plating, in particular to a preparation method of a rare earth element doped tungsten alloy plating layer.The preparation method comprises the following steps: a mixing process, in which a first powder containing a rare earth element and a second powder containing a tungsten element are mixed to obtain a mixture; a die casting process, in which the mixture is subjected to die casting treatment to obtain an ingot; a heat treatment process, in which the ingot is subjected to heat treatment to obtain a solid solution; a machining process, in which the solid solution is subjected to machining treatment to obtain a target material containing the rare earth element and the tungsten element; and a deposition process, in which the target material is subjected to deposition treatment to deposit the rare earth element and the tungsten element in the target material on the surface of a workpiece to obtain the rare earth element doped tungsten alloy plating layer.The preparation method can make the prepared tungsten alloy plating layer have good weather resistance and corrosion resistance, thereby meeting the increasing development requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plating, in particular to a preparation method of a rare earth element doped tungsten alloy plating layer. BACKGROUND

[0002] Tungsten alloy plating layer is favored due to its high hardness and high wear resistance and other excellent performances, and is widely used in various mechanical parts. With the wide application of tungsten alloy plating layer in mechanical parts, the requirements therefor are getting higher and higher. However, in the related art, the weather resistance and corrosion resistance of tungsten alloy cannot meet the increasing development requirements. SUMMARY

[0003] The present application provides a preparation method of a rare earth element doped tungsten alloy plating layer, which can make the prepared tungsten alloy plating layer have good weather resistance and corrosion resistance, thereby meeting the increasing development requirements.

[0004] The present application provides a preparation method of a rare earth element doped tungsten alloy plating layer, which can make the prepared tungsten alloy plating layer have good weather resistance and corrosion resistance, thereby meeting the increasing development requirements.

[0005] The mixing process mixes the first powder containing the rare earth element and the second powder containing the tungsten element to obtain a mixed material;

[0006] The die casting process performs die casting treatment on the mixed material to obtain an ingot;

[0007] The heat treatment process performs heat treatment on the ingot to obtain a solid solution;

[0008] The machining process performs machining treatment on the solid solution to obtain a target material containing the rare earth element and the tungsten element;

[0009] The deposition process performs deposition treatment on the target material to deposit the rare earth element and the tungsten element in the target material on the surface of a workpiece to be processed to obtain a rare earth element doped tungsten alloy plating layer.

[0010] In some embodiments of the present application, in the mixing process, the mass ratio of the rare earth element to the tungsten element is 1:(50-80).

[0011] In some embodiments of the present application, in the mixing process, the rare earth element includes at least one of lanthanum, cerium, europium, ytterbium, terbium and dysprosium, and the second powder further includes a nickel element.

[0012] In some embodiments of the present application, in the mixing process, the mass content of the tungsten element in the second powder and the mass content of the nickel element in the second powder are in a ratio of (6-9):1.

[0013] In some embodiments of the present invention, in the mixing process, the particle size of the first powder is 10 μm to 30 μm, and the particle size of the second powder is 50 μm to 80 μm.

[0014] In some embodiments of the present invention, prior to the mixing step, the following is further included:

[0015] In the grinding process, the first powder and the second powder are ground separately to obtain the first powder with a particle size of 10μm to 30μm and the second powder with a particle size of 50μm to 80μm.

[0016] In some embodiments of the present invention, in the die-casting process, the temperature of the die-casting treatment is 800℃~1000℃, and the pressure of the die-casting is 250MPa~300MPa.

[0017] In some embodiments of the present invention, in the heat treatment process, the temperature of the heat treatment is 600°C to 800°C, and the time of the heat treatment is 1 hour to 2 hours.

[0018] In some embodiments of the present invention, the deposition process includes physical vapor deposition.

[0019] In some embodiments of the present invention, the deposition process includes:

[0020] Inert gas is introduced at a flow rate of 30-100 sccm, under a bias voltage of 100-120V, a duty cycle of 55%-65%, and a vacuum degree of 3×10⁻⁶. -4 Pa~2×10 -3 After Pa and temperature reach 350℃~400℃, the power supply of the target material is turned on, and physical vapor deposition is performed under a current of 100A~150A to deposit rare earth elements and tungsten elements in the target material onto the surface of the workpiece to be processed, thereby obtaining a rare earth element doped tungsten alloy coating.

[0021] The method for preparing rare-earth element-doped tungsten alloy coatings provided in this invention, through mixing, die-casting, heat treatment, and machining processes, facilitates the formation of a target material in which rare-earth elements are doped into the tungsten alloy, thereby reducing the impurity content in the coating. Furthermore, the deposition process helps to uniformly dope the rare-earth elements into the tungsten alloy coating, reducing the grain size and creating a denser structure that enhances hardness and wear resistance, as well as improving weather resistance and corrosion resistance. Therefore, the preparation method provided in this invention not only improves the hardness and wear resistance of tungsten alloy coatings but also enhances their weather resistance and corrosion resistance, thus meeting the increasing demands of modern technology.

[0022] The above description is only a summary of the technical solutions of the present application, in order to enable the technical means of the present application to be implemented according to the content of the present application, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0023] Drawings of the specification

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0025] Figure 1 A flowchart of the preparation method of the rare earth element doped tungsten alloy coating provided by some embodiments of the present application is shown. DETAILED DESCRIPTION

[0026] The "range" disclosed in the present application is limited in the form of lower limit and upper limit, a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The range defined in this way can include or not include the end value, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range.

[0027] Unless otherwise specified, the terms used in the present application have the commonly understood meanings understood by those skilled in the art.

[0028] Unless otherwise specified, the values of the parameters mentioned in the present application can be measured by various test methods commonly used in the art, for example, the test methods given in the embodiments of the present application can be used for measurement.

[0029] Please refer to Figure 1 As shown, the embodiments of the present application provide a preparation method of a rare earth element doped tungsten alloy coating, comprising:

[0030] S100, a mixing process, mixing a first powder containing a rare earth element and a second powder containing a tungsten element to obtain a mixed material;

[0031] S200, a die casting process, performing die casting treatment on the mixed material to obtain an ingot;

[0032] S300, a heat treatment process, performing heat treatment on the ingot to obtain a solid solution;

[0033] S400, a machining process is performed on the solid solution to obtain a target material containing rare earth elements and tungsten elements;

[0034] S500, a deposition process is performed on the target material to deposit the rare earth elements and the tungsten elements in the target material on the surface of a workpiece to be processed to obtain a rare earth element-doped tungsten alloy coating.

[0035] The preparation method of the rare earth element-doped tungsten alloy coating provided by the embodiment of the present application can help to form a target material in which rare earth elements are doped in a tungsten alloy through the mixing process, the die casting process, the heat treatment process and the machining process, thereby reducing the impurity content in the coating. Moreover, the deposition process can help to uniformly dope the rare earth elements in the tungsten alloy coating, which can reduce the size of the grains in the coating, form a dense structure of the coating to enhance the hardness and wear resistance of the coating, and improve the weather resistance and corrosion resistance of the coating. Therefore, the preparation method provided by the embodiment of the present application can not only improve the hardness and wear resistance of the tungsten alloy coating, but also improve the weather resistance and corrosion resistance of the coating, thereby meeting the increasing development requirements.

[0036] In some embodiments of the present application, in the mixing process, the mass ratio of the rare earth elements to the tungsten elements is 1:(50-80). The mass ratio of the rare earth elements to the tungsten elements in the above suitable range can help to improve the weather resistance and corrosion resistance of the coating while further improving the hardness and wear resistance of the coating.

[0037] For example, the mass ratio of the rare earth elements to the tungsten elements can be, but is not limited to, 1:50, 1:55, 1:60, 1:65, 1:70, 1:75 or 1:80.

[0038] In some embodiments of the present application, in the mixing process, the rare earth elements include at least one of lanthanum, cerium, europium, ytterbium, terbium and dysprosium, and the second powder further includes a nickel element. Selecting the above suitable types of rare earth elements can further enhance the weather resistance and corrosion resistance of the coating, and the second powder including the nickel element can further improve the hardness and wear resistance of the coating.

[0039] In some embodiments of the present application, in the mixing process, the mass content of the tungsten elements in the second powder and the mass content of the nickel elements in the second powder are in a ratio of (6-9):1.

[0040] In some embodiments of the present application, in the mixing process, the particle size of the first powder is 10-30 μm, and the particle size of the second powder is 50-80 μm. The above particle size can help to reduce the size of the grains in the coating, thereby forming a dense structure of the coating.

[0041] In some embodiments of the present application, before the mixing process, further comprising:

[0042] The grinding process is performed on the first powder and the second powder respectively to obtain the first powder with a particle size of 10-30 μm and the second powder with a particle size of 50-80 μm.

[0043] In some embodiments of the present application, in the die casting process, the temperature of the die casting process is 800-1000 ℃, and the pressure of the die casting is 250-300 MPa. Under the temperature of 800-1000 ℃ and the pressure of 250-300 MPa, the gap between the powders can be reduced, which helps to form a solid target, thus reducing the risk of cracks or breakage of the target during use.

[0044] In some embodiments of the present application, in the heat treatment process, the temperature of the heat treatment is 600-800 ℃, and the time of the heat treatment is 1-2 h. In the temperature range of 600-800 ℃, the mixing of each metal element can be more uniform, thereby improving the strength of the solid melt. Moreover, the heat treatment process can also promote the refinement of the crystal grains, which helps to improve the uniformity and quality of the coating in the sputtering process.

[0045] In some embodiments of the present application, the deposition process comprises a physical vapor deposition process.

[0046] In some embodiments of the present application, the deposition process comprises:

[0047] The inert gas is introduced at a flow rate of 30-100 sccm, under a bias voltage of 100-120 V, a duty cycle of 55-65%, and a vacuum degree of 3×10 -4 Pa-2×10 -3 Pa and the temperature reaches 350-400 ℃, the power of the target is started, and the physical vapor deposition process is performed under a current of 100-150 A to deposit the rare earth elements and tungsten elements in the target on the surface of the workpiece to obtain a rare earth element-doped tungsten alloy coating.

[0048] The following embodiments describe the present application in more detail, which are only used for illustrative purposes, and various modifications and changes within the scope of the present application are obvious to those skilled in the art. Unless otherwise stated, all parts, percentages and ratios reported in the following embodiments are based on mass, and all reagents used in the embodiments are commercially available or synthesized according to conventional methods, and can be used directly without further treatment, and the instruments used in the embodiments are commercially available.

[0049] Example 1

[0050] The embodiment provides a preparation method of a rare earth element doped tungsten alloy coating, which comprises the following steps:

[0051] W powder with a purity of 99.999% and lanthanum powder with a purity of 99.995% are respectively subjected to grinding treatment to obtain W powder with an average particle size of 55 μm and lanthanum powder with an average particle size of 15 μm;

[0052] The W powder with an average particle size of 55 μm and the lanthanum powder with an average particle size of 15 μm are subjected to grinding mixing according to a mass ratio of 50:1 to obtain a mixture;

[0053] The mixture is subjected to die casting treatment, wherein the temperature is 1000 ℃, the pressure is 250 MPa, and the time is 5 h, so that an ingot is obtained;

[0054] The ingot is subjected to heat treatment, wherein the temperature is 800 ℃, and the heat treatment time is 2 h, so that a solid solution is obtained;

[0055] The solid solution is subjected to machining treatment, so that a target material is obtained;

[0056] argon gas is introduced at a flow rate of 50 sccm, a bias voltage is 110 V, a duty cycle is 55%, a vacuum degree is 3x10 -4 Pa, and the temperature reaches 370 ℃, the power supply of the target material is started, and physical vapor deposition treatment is carried out under the condition that the current is 120 A, so that the rare earth element and the tungsten element in the target material are deposited on the surface of the steel plate, and a rare earth element doped tungsten alloy coating is obtained.

[0057] Embodiment 2

[0058] The embodiment provides a preparation method of a rare earth element doped tungsten alloy coating, which comprises the following steps:

[0059] W powder with a purity of 99.999% and lanthanum powder with a purity of 99.995% are respectively subjected to grinding treatment to obtain W powder with an average particle size of 60 μm and lanthanum powder with an average particle size of 20 μm;

[0060] The W powder with an average particle size of 60 μm and the lanthanum powder with an average particle size of 20 μm are subjected to grinding mixing according to a mass ratio of 50:1 to obtain a mixture;

[0061] The mixture is subjected to die casting treatment, wherein the temperature is 1000 ℃, the pressure is 250 MPa, and the time is 5 h, so that an ingot is obtained;

[0062] The ingot is subjected to heat treatment, wherein the temperature is 800 ℃, and the heat treatment time is 2 h, so that a solid solution is obtained;

[0063] The solid solution is subjected to machining treatment, so that a target material is obtained;

[0064] argon gas is introduced at a flow rate of 50 sccm, the bias voltage is 110 V, the duty cycle is 55%, and the vacuum degree is 3x10 -4 After the temperature reaches 370 DEG C, the power supply of the target material is started, and physical vapor deposition treatment is performed at a current of 120 A to deposit the rare earth elements and tungsten elements in the target material on the surface of the steel plate to obtain a rare earth element-doped tungsten alloy coating.

[0065] Example 3

[0066] The embodiment provides a preparation method of a rare earth element-doped tungsten alloy coating, which comprises the following steps:

[0067] W powder with a purity of 99.999% and lanthanum powder with a purity of 99.995% are respectively subjected to grinding treatment to obtain W powder with an average particle size of 75 μm and lanthanum powder with an average particle size of 25 μm;

[0068] The W powder with an average particle size of 75 μm and the lanthanum powder with an average particle size of 25 μm are subjected to grinding mixing according to a mass ratio of 50:1 to obtain a mixed material;

[0069] The mixed material is subjected to die casting treatment, wherein the temperature is 1000 DEG C, the pressure is 250 MPa, and the time is 5 h to obtain an ingot;

[0070] The ingot is subjected to heat treatment, wherein the temperature is 800 DEG C, and the heat treatment time is 2 h to obtain a solid solution;

[0071] The solid solution is subjected to machining treatment to obtain a target material;

[0072] argon gas is introduced at a flow rate of 50 sccm, the bias voltage is 110 V, the duty cycle is 55%, and the vacuum degree is 3x10 -4 After the temperature reaches 370 DEG C, the power supply of the target material is started, and physical vapor deposition treatment is performed at a current of 120 A to deposit the rare earth elements and tungsten elements in the target material on the surface of the steel plate to obtain a rare earth element-doped tungsten alloy coating.

[0073] Example 4

[0074] The embodiment provides a preparation method of a rare earth element-doped tungsten alloy coating, which comprises the following steps:

[0075] W powder with a purity of 99.999% and lanthanum powder with a purity of 99.995% are respectively subjected to grinding treatment to obtain W powder with an average particle size of 75 μm and lanthanum powder with an average particle size of 25 μm;

[0076] The W powder with an average particle size of 75 μm and the lanthanum powder with an average particle size of 25 μm are subjected to grinding mixing according to a mass ratio of 50:1 to obtain a mixed material;

[0077] The mixed material is subjected to die casting treatment, wherein the temperature is 1000℃, the pressure is 250MPa, and the time is 5h, to obtain an ingot;

[0078] The ingot is subjected to heat treatment at a temperature of 800℃ for 2h to obtain a solid solution;

[0079] The solid solution is subjected to machining treatment to obtain a target material;

[0080] The argon gas is introduced at a flow rate of 50sccm, the bias voltage is 110V, the duty cycle is 55%, the vacuum degree is 3×10 -4 After the temperature reaches 370℃, the power supply of the target material is started, and the physical vapor deposition treatment is performed at a current of 120A to deposit the rare earth elements and tungsten elements in the target material on the surface of the steel plate to obtain a rare earth element doped tungsten alloy coating.

[0081] Example 5

[0082] The embodiment provides a preparation method of a rare earth element doped tungsten alloy coating, comprising the following steps:

[0083] The W powder with a purity of 99.999% and the lanthanum powder with a purity of 99.995% are respectively subjected to grinding treatment to obtain W powder with an average particle size of 55μm and lanthanum powder with an average particle size of 15μm;

[0084] The W powder with an average particle size of 55μm and the lanthanum powder with an average particle size of 15μm are mixed by grinding according to a mass ratio of 80:1 to obtain a mixed material;

[0085] The mixed material is subjected to die casting treatment, wherein the temperature is 1000℃, the pressure is 250MPa, and the time is 5h, to obtain an ingot;

[0086] The ingot is subjected to heat treatment at a temperature of 800℃ for 2h to obtain a solid solution;

[0087] The solid solution is subjected to machining treatment to obtain a target material;

[0088] The argon gas is introduced at a flow rate of 50sccm, the bias voltage is 110V, the duty cycle is 55%, the vacuum degree is 3×10 -4 After the temperature reaches 370℃, the power supply of the target material is started, and the physical vapor deposition treatment is performed at a current of 120A to deposit the rare earth elements and tungsten elements in the target material on the surface of the steel plate to obtain a rare earth element doped tungsten alloy coating.

[0089] Example 6

[0090] The embodiment provides a preparation method of a rare earth element doped tungsten alloy coating, comprising the following steps:

[0091] The nickel tungsten alloy powder containing 89% of W and 10% of Ni and the 99.995% lanthanum powder are respectively ground to obtain the W powder with an average particle size of 55 μm and the lanthanum powder with an average particle size of 15 μm;

[0092] The W powder with an average particle size of 55 μm and the lanthanum powder with an average particle size of 15 μm are ground and mixed according to a mass ratio of 70:1 to obtain a mixture;

[0093] The mixture is subjected to die casting treatment, wherein the temperature is 1000℃, the pressure is 250 MPa, and the time is 5 h to obtain an ingot;

[0094] The ingot is subjected to heat treatment, wherein the temperature is 800℃, and the heat treatment time is 2 h to obtain a solid solution;

[0095] The solid solution is subjected to machining treatment to obtain a target material;

[0096] After argon gas is introduced at a flow rate of 50 sccm, the bias voltage is 110 V, the duty cycle is 55%, the vacuum degree is 3×10 -4 Pa, and the temperature reaches 370℃, the power supply of the target material is started, and the physical vapor deposition treatment is performed at a current of 120 A to deposit the rare earth element and the tungsten element in the target material on the surface of the steel plate to obtain a rare earth element doped tungsten alloy coating.

[0097] Example 7

[0098] The embodiment provides a preparation method of a rare earth element doped tungsten alloy coating, which comprises the following steps:

[0099] The W powder with a purity of 99.999% and the rare earth powder containing 48% of lanthanum and 51% of cerium are respectively ground to obtain the W powder with an average particle size of 55 μm and the lanthanum powder with an average particle size of 15 μm;

[0100] The W powder with an average particle size of 55 μm and the rare earth powder with an average particle size of 15 μm are ground and mixed according to a mass ratio of 50:1 to obtain a mixture;

[0101] The mixture is subjected to die casting treatment, wherein the temperature is 1000℃, the pressure is 250 MPa, and the time is 5 h to obtain an ingot;

[0102] The ingot is subjected to heat treatment, wherein the temperature is 800℃, and the heat treatment time is 2 h to obtain a solid solution;

[0103] The solid solution is subjected to machining treatment to obtain a target material;

[0104] After argon gas is introduced at a flow rate of 50 sccm, the bias voltage is 110 V, the duty cycle is 55%, the vacuum degree is 3×10 -4After the temperature reaches 370℃, the power supply of the target material is started, and physical vapor deposition treatment is carried out under the condition of a current of 120 A, so as to deposit the rare earth elements and tungsten elements in the target material on the surface of the steel plate, and obtain a rare earth element doped tungsten alloy coating.

[0105] Comparative Example 1

[0106] The present comparative example provides a preparation method of a tungsten alloy coating, comprising:

[0107] Na2WO4.2H2O 60 g / L, NiSO4 7H2O 80 g / L, H3PO3 30 g / L, La 3+ 5 g / L, HSB0310 g / L, H3PO4 15 g / L, ammonium sulfate 32 g / , sodium allyl sulfonate 60 g / L, trimethyl dodecyl ammonium chloride 8 g / L, polymethacrylic acid 8 g / L, ammonium alginate 15 g / L, ZrO2 microparticles (average particle size d = 3 μm) 80 g / L are mixed to obtain an electroplating solution;

[0108] After a series of pretreatments such as oil removal, strong etching, and weak etching are carried out on the steel plate, pulse composite electroplating is carried out by using controlled current bidirectional pulse current, the on time of the forward current is controlled to be 1 s, the off time is controlled to be 200 ms, and the average current density is controlled to be 220 mA / cm 2 ; the on time of the reverse pulse current is controlled to be 50 ms, the current off time is controlled to be 1 s, and the average current density is controlled to be 10 mA / cm2ft ii s; electroplating is carried out at a temperature of 20℃ for 100 h, and a La doped nickel tungsten alloy coating is obtained.

[0109] Test Part

[0110] 1) Grain size test

[0111] The tungsten alloy coatings prepared in Examples 1-7 and Comparative Example 1 are characterized by transmission electron microscopy, TEM samples (5 μm x 10 μm x 0.08 μm) are prepared by focused ion beam (FIB), and the test is carried out by using a Thermo Fisher Talos F200X scanning transmission electron microscope with an acceleration voltage of 100 kV-200 kV, and the test results are shown in Table 1.

[0112] 2) Hardness test

[0113] The test is carried out according to the method of national standard GB / T4340-1990, and the test results are shown in Table 1.

[0114] 3) Wear resistance test

[0115] The tungsten alloy coating prepared from Examples 1-7 and Comparative Example 1 was placed on a vertical universal wear tester to test the wear amount, the rotation speed during the test was 300 rpm, the load was 9 N, the grinding wheel was GCr15, and the test time was 1 h, and the test results are shown in Table 1.

[0116] 4) Weather resistance test

[0117] The square resistance of the coating was measured under relative humidity of 85% and high temperature treatment of 85°C, and the square resistance retention time was recorded, and the test results are shown in Table 1, wherein the longer the square resistance retention time, the better the weather resistance.

[0118] 5) Corrosion resistance test

[0119] The steel plate with tungsten alloy coating was placed in a cyclic corrosion test chamber, and a 20-cycle cyclic corrosion test was performed, the cyclic corrosion test met the requirements of Appendix A of ISO 11997-1:2017, then the time of red rust on the alloy surface was observed, the longer the time of red rust, the better the corrosion resistance, and the test results are shown in Table 1.

[0120] Table 1 Test results of Examples 1-7 and Comparative Example 1

[0121]

[0122]

[0123] According to Table 1, by comparing the test results of Examples 1-3, it can be known that as the ratio of tungsten element and rare earth element gradually increases, the hardness and wear resistance will increase, and the weather resistance and corrosion resistance will decrease, thus it can be known that the increase of tungsten content can help to improve the hardness and wear resistance of the coating, and the increase of rare earth element content can help to improve the weather resistance and corrosion resistance of the coating.

[0124] By comparing the test results of Examples 1, 4 and 5, it can be known that as the particle size of the first powder and the second powder increases, the size of the grains in the coating will gradually increase, and thus the hardness, wear resistance, weather resistance and corrosion resistance will decrease, thus it can be known that small particle size powder helps to reduce the size of the grains, thereby improving the hardness, wear resistance, weather resistance and corrosion resistance.

[0125] By comparing the test results of Example 1 and Example 6, it can be known that the addition of nickel element can help to improve the hardness and wear resistance of the coating.

[0126] By comparing the test results of Example 1 and Example 7, it can be known that the doping of multiple rare earth elements can help to improve the hardness, wear resistance, weather resistance and corrosion resistance.

[0127] Compared with the comparative example 1, the present application can help to form the target material with the rare earth elements doped in the tungsten alloy through the mixing process, the die casting process, the heat treatment process and the machining process, and then reduce the impurity content in the plating layer. Moreover, through the deposition process, the rare earth elements can be uniformly doped in the tungsten alloy plating layer, which can reduce the size of the grains in the plating layer, make the plating layer form a dense structure to enhance the hardness and wear resistance, and also can improve the weather resistance and corrosion resistance of the plating layer. The comparative example 1 forms the plating layer through the electroplating, the grain size in the plating layer is large, which leads to the hardness and wear resistance far less than the embodiments provided by the present application, and the doping of the rare earth elements is not easy to control, which leads to the weather resistance and corrosion resistance less than the embodiments provided by the present application.

[0128] In summary, the preparation method provided by the embodiments of the present application can not only improve the hardness and wear resistance of the tungsten alloy plating layer, but also improve the weather resistance and corrosion resistance of the plating layer, so as to meet the increasing development needs.

[0129] Finally, it should be noted that: the above experimental examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above experimental examples, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above experimental examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the experimental examples of the present application.

Claims

1. A method for producing a rare earth element-doped tungsten alloy plating layer, characterized by comprising: a step of forming a tungsten alloy plating layer on a substrate; and a step of performing ion implantation of a rare earth element into the tungsten alloy plating layer. The method comprises the following steps: a mixing step of mixing a first powder composed of rare earth elements and a second powder composed of tungsten elements to obtain a mixture; a die casting step of performing die casting treatment on the mixture to obtain an ingot, wherein the temperature of the die casting treatment is 800-1000 DEG C, and the pressure of the die casting is 250-300 MPa; a heat treatment step of performing heat treatment on the ingot to obtain a solid solution, wherein the temperature of the heat treatment is 600-800 DEG C, and the time of the heat treatment is 1-2 h; a machining step of performing machining treatment on the solid solution to obtain a target material containing rare earth elements and tungsten elements; a deposition step of performing deposition treatment on the target material to deposit the rare earth elements and the tungsten elements in the target material on the surface of a workpiece to be processed to obtain a rare earth element-doped tungsten alloy coating layer; wherein the mass ratio of the rare earth elements to the tungsten elements is 1:(50-80), the rare earth elements are composed of lanthanum and cerium, the particle size of the first powder is 10-30 μm, and the particle size of the second powder is 50-80 μm.

2. The production method according to claim 1, characterized by, Before the mixing step, the method further comprises the following steps: a grinding step of respectively performing grinding treatment on the first powder and the second powder to obtain the first powder with a particle size of 10-30 μm and the second powder with a particle size of 50-80 μm.

3. The method of claim 1, wherein, The deposition treatment comprises physical vapor deposition treatment.

4. The production method according to claim 3, characterized by, The deposition step comprises: The inert gas is introduced at a flow rate of 30-100 sccm, the bias voltage is 100-120 V, the duty cycle is 55-65%, and the vacuum degree is 3*10 -4 Pa~2*10 -3 After the temperature reaches 350-400 DEG C, the power supply of the target is started, and the physical vapor deposition treatment is carried out under the condition that the current is 100-150 A, so as to deposit the rare earth element and the tungsten element in the target on the surface of the workpiece to be processed, and obtain a rare earth element doped tungsten alloy coating.

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