CN114318202A - Nickel-based alloy surface wear-resistant coating and preparation method thereof - Google Patents
Nickel-based alloy surface wear-resistant coating and preparation method thereof Download PDFInfo
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- CN114318202A CN114318202A CN202111443314.5A CN202111443314A CN114318202A CN 114318202 A CN114318202 A CN 114318202A CN 202111443314 A CN202111443314 A CN 202111443314A CN 114318202 A CN114318202 A CN 114318202A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 174
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 94
- 239000000956 alloy Substances 0.000 title claims abstract description 94
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 85
- 238000000576 coating method Methods 0.000 title claims abstract description 50
- 239000011248 coating agent Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 25
- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000011065 in-situ storage Methods 0.000 claims abstract description 12
- 229910000943 NiAl Inorganic materials 0.000 claims abstract description 10
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- 230000001050 lubricating effect Effects 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 229910020350 Na2WO4 Inorganic materials 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229910052786 argon Inorganic materials 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 13
- 238000000137 annealing Methods 0.000 claims description 12
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 6
- 238000005269 aluminizing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 244000137852 Petrea volubilis Species 0.000 claims description 3
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- 239000010432 diamond Substances 0.000 claims description 3
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- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 3
- 229910019589 Cr—Fe Inorganic materials 0.000 claims description 2
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
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- 239000010452 phosphate Substances 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a wear-resistant coating on the surface of a nickel-based alloy and a preparation method thereof2O3Ceramic layer and WS having lubricating function2Wear-resistant coating of particles, WS2Particles dispersed in Al2O3In the ceramic layer. Polishing the surface of the nickel-based alloy, corroding the surface with acid liquor, immersing the surface into molten aluminum to form an aluminum-immersed layer, and performing in argonAnnealing to form a NiAl diffusion layer; then in the presence of Na2WO4And Na2Performing constant-current micro-arc oxidation treatment of sectional type forward/reverse current cooperative control in phosphate aqueous solution of S to form wear-resistant ceramic Al on the surface in situ2O3And lubricating function WS2Compounding the strengthened wear-resistant coating. According to the invention, through the dual functions of the NiAl diffusion layer and the constant-current micro-arc oxidation process of the sectional type forward/reverse current cooperative control, the nickel-based alloy is promoted to form a layered friction layer in the friction process, the friction coefficient of the nickel-based alloy is effectively reduced, and the wear resistance is improved by the strengthening effect of the ceramic phase.
Description
Technical Field
The invention belongs to a nickel-based alloy surface coating and preparation thereof, and particularly relates to a nickel-based alloy surface wear-resistant coating and a preparation method thereof.
Background
The nickel-based alloy has the advantages of good mechanical property, corrosion resistance and the like, and is widely applied to equipment manufacturing materials in the fields of chemical energy industry, nuclear energy industry, transportation and the like, such as engine turbine parts, continuous casting machine rollers, extrusion dies and the like. Under the reciprocating transmission condition, the nickel-based alloy is easy to generate the friction and wear phenomenon, is difficult to form a film and is easy to lose efficacy. Therefore, insufficient wear resistance makes it difficult to meet the requirements of the worn working environment, and the frequency of replacement of parts increases. At present, the wear resistance of the nickel-based alloy is improved mainly by ceramic phase reinforced nickel-based alloy and a surface modification method: firstly, wear-resistant phases represented by graphite and ceramic phases are added into a nickel-based alloy matrix, and a nickel-based composite material is formed through a powder metallurgy process, but the bonding strength of the interface of the reinforcing phase and the nickel-based alloy is weak, and meanwhile, the distribution state of the reinforcing phase in the nickel-based alloy is difficult to regulate and control, so that the wear resistance of the nickel-based alloy is difficult to effectively improve. On the other hand, the surface modification technology provides a way for improving the wear resistance of the nickel-based alloy, for example, chemical surface heat treatment such as nitriding, carburizing, boronizing and the like can improve the surface hardness and the wear resistance of metal materials, but a permeable layer is thin and is difficult to meet the long-time wear requirement, so that the wide application of the nickel-based alloy is limited.
Disclosure of Invention
The purpose of the invention is as follows: the first purpose of the invention is to provide a nickel-based alloy surface wear-resistant coating; the invention also aims to provide a preparation method of the wear-resistant coating.
The technical scheme is as follows: the wear-resistant coating on the surface of the nickel-based alloy comprises a nickel-based alloy matrix, wherein Al grows on the surface of the nickel-based alloy matrix in situ2O3Ceramic layer and WS having lubricating function2Wear resistant coating of particles, said WS2Particles dispersed in Al2O3In the ceramic layer.
Wherein, Al2O3And WS2The composite coating is formed by soaking the surface of the nickel-based alloy with an aluminum layer on Na2WO4And Na2The mixed aqueous solution of S is formed in situ by micro-arc oxidation.
The invention also discloses a preparation method of the nickel-based alloy surface wear-resistant coating, which comprises the following steps:
(1) pretreating the nickel-based alloy, and then corroding the surface by adopting a hydrofluoric acid dilute solution to obtain a rough surface;
(2) preparing an aluminum-dipped layer on the surface of the nickel-based alloy with the rough surface by adopting an inert argon assisted aluminum dipping process, and annealing the aluminum-dipped layer in an argon protection environment to form a NiAl diffusion layer between the aluminum-dipped layer and the nickel-based alloy;
(3) taking Na2WO4、Na2S、Na3PO4Mixing NaOH and water to prepare a mixed solution;
(4) placing the nickel-based alloy aluminized layer obtained in the step (2) in the mixed solution obtained in the step (3), carrying out oxidation treatment by using a constant-current micro-arc oxidation process under the cooperative control of sectional forward/reverse current, and forming Al on the surface of the aluminized layer in situ2O3Ceramic layer and WS2The particles are compounded with the reinforced wear-resistant coating.
Further, the hot dip aluminum process assisted by inert argon in the step (2) specifically includes: heating pure aluminum with the purity of 99.5% to 690-720 ℃ in a vacuum furnace to obtain pure aluminum liquid, filling argon into the vacuum furnace until the pressure in the vacuum furnace is 0.1-0.2 MPa, and immersing the nickel-based alloy with the rough surface into the pure aluminum liquid for 10-30 min.
Further, in the step (2), the annealing temperature is 250-400 ℃, and the annealing time is 1-2 hours.
Further, in the step (2), the thickness of the aluminum-impregnated layer is 500-1000 μm.
Further, in the step (3), Na2WO4、Na2S、Na3PO4And NaOH in a mass ratio of 6-10: 10-20: 7-12: 1 to 1.5.
Further, in the step (4), the constant current micro arc oxidation process controlled by the sectional forward/reverse current cooperation specifically comprises: the forward current density is 2-4A/cm within 0-50 s3The reverse current density is 1.5-2A/cm3(ii) a After 50s, the forward current density is 3-5A/cm3The reverse current density is 2-2.5A/cm3。
Further, in the step (1), the pretreatment specifically includes: and (4) polishing the nickel-based alloy to a mirror surface by adopting sand paper and diamond grinding paste.
Furthermore, in the step (1), the corrosion time is 3-10 s.
Further, the nickel-based alloy is any one of a Ni-Cr alloy, a Ni-Cr-Mo alloy and a Ni-Cr-Fe alloy.
The preparation principle of the invention is as follows: according to the tribological performance requirement of the nickel-based alloy in the service process and the material surface modification principle, the polished nickel-based alloy is corroded to form a rough surface, the surface of the nickel-based alloy with the rough surface is immersed into pure aluminum liquid under the pressure assistance of inert argon gas for surface hot aluminizing, so that the oxidation between the interfaces of pure aluminum and the nickel-based alloy can be avoided, the wetting action between the interfaces can be enhanced under the pressure assistance, the mechanical bonding strength between the aluminized layer and the nickel-based alloy matrix is increased, and meanwhile, through the argon environment annealing treatment, nickel and aluminum are promoted,Diffusion of aluminum and other atoms forms a NiAl diffusion layer on the interface of the aluminum-impregnated layer and the nickel-based alloy matrix, so that the interface bonding strength is obviously enhanced; secondly, based on Al2O3High wear resistance, WS of ceramics2In the presence of Na2WO4And Na2Micro-arc oxidation treatment is carried out in phosphate aqueous solution of S to promote the in-situ formation of the aluminum-dipped layer containing the wear-resistant ceramic Al2O3And lubricating function WS2The composite strengthened wear-resistant coating enhances the bonding strength of a ceramic phase and the coating and is applied to Al2O3And W2And under the synergistic action of the wear reduction and the self-lubrication of the S, the wear resistance of the nickel-based alloy is further improved.
The invention relates to a constant-current micro-arc oxidation process based on sectional type forward/reverse current cooperative control, which prepares Al containing wear-resistant ceramic on the surface of a nickel-based alloy aluminized layer in situ2O3And lubricating function WS2On one hand, the application of low-to-high sectional forward/reverse current can promote the uniform size of pores in the micro-arc oxidation film layer; on the other hand, due to ceramic Al2O3Wear resistance strengthening action of, WS2The self-lubricating function of the ceramic phase promotes the nickel-based alloy to form a layered friction layer in the friction process, the friction coefficient of the nickel-based alloy is effectively reduced, and the wear resistance is improved due to the strengthening function of the ceramic phase.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the aluminum-impregnated layer is prepared on the surface of the corroded nickel-based alloy by adopting an inert argon assisted aluminum hot dipping process, the auxiliary action of the inert argon can avoid the oxidation between the interfaces of pure aluminum and the nickel-based alloy and can also enhance the wetting action between the interfaces under the assistance of pressure, the mechanical bonding strength of the aluminum-impregnated layer and the nickel-based alloy matrix is enhanced, a NiAl diffusion layer is formed through annealing treatment in the argon atmosphere, and the metallurgical bonding strength of the aluminum-impregnated layer and the nickel-based alloy matrix is further enhanced; on the other hand, Al formed in situ on the surface of the aluminized layer by adopting a micro-arc oxidation process2O3And lubricating function WS2Composite reinforced wear resistant coatings wherein WS2Phase with Al2O3Metallurgy with high coating formationThe enhancement of the interface strength can obviously reduce the adhesion of the coating in the friction process and avoid the peeling and failure of the coating caused by weak interface strength, thereby improving the wear resistance of the material.
Drawings
FIG. 1 is a phase diagram of a wear-resistant coating on the surface of a nickel-based alloy prepared in example 1;
FIG. 2 is the surface topography of the wear-resistant coating on the surface of the nickel-based alloy prepared in example 2;
FIG. 3 is a graph of wear rates of self-lubricating nickel-base alloys made in examples 1-4.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
Example 1
(1) Polishing the Ni-Cr nickel-based alloy to a mirror surface by adopting sand paper and diamond grinding paste, and then corroding for 3 seconds in a hydrofluoric acid dilute solution to obtain a rough surface;
(2) heating pure aluminum with the purity of 99.5% to 690 ℃ in a vacuum furnace, adopting an inert argon assisted hot dipping aluminum process, flushing argon into the vacuum furnace until the pressure in the furnace reaches 0.1MPa, immersing the Ni-Cr nickel-based alloy surface with the rough surface in the step into pure aluminum liquid for 10min to prepare an aluminum dipping layer with the thickness of 500 mu m, annealing the aluminum dipping layer for 2h at 250 ℃ under an argon protection environment, and forming a NiAl diffusion layer between the aluminum dipping layer and the nickel-based alloy;
(3) the preparation is 6g/L Na2WO4、10g/L Na2S、7g/L Na3PO41g/L of NaOH;
(4) the forward current density is 2A/cm within 0-50 s3The reverse current density was 1.5A/cm3(ii) a After 50s, adopting a forward current density of 3A/cm3The reverse current density is 2A/cm3The micro-arc oxidation process carries out oxidation treatment on the Ni-Cr nickel-based alloy surface aluminum-dipped layer in the step (2) in the aqueous solution in the step (3), and ceramic Al is formed on the surface of the aluminum-dipped layer in situ2O3And lubricating function W2S composite reinforced wear-resistant coating。
As can be seen from FIG. 1, in addition to the diffraction peak of the Ni-based alloy matrix, the phase spectrogram of the wear-resistant coating on the surface of the Ni-based alloy also shows the diffraction peak of the hot-dipped aluminum layer and the diffraction peak of the NiAl phase, which illustrate that the Ni in the hot-dipped aluminum layer and the Ni-based alloy matrix forms a diffusion layer between interfaces, and simultaneously, the phase spectrogram also has in-situ ceramic Al formed by micro-arc oxidation2O3And lubricating function WS2The diffraction peak of the phase shows that the nickel-based alloy surface wear-resistant coating and the preparation method thereof provided by the invention can enhance the wettability of the interface between the coating and the nickel-based alloy and form an oxide ceramic phase and a self-lubricating phase.
Example 2
The difference between this example and example 1 is: heating the pure aluminum with the purity of 99.5 percent in the step (2) to 720 ℃ in a vacuum furnace, flushing argon into the vacuum furnace until the pressure in the furnace reaches 0.15MPa, setting the thickness of the hot dip aluminum layer preparation layer to be 800 mu m, setting the annealing temperature to be 350 ℃, and the rest is the same as the embodiment 1.
From FIG. 2, Al can be found2O3Dispersed WS in ceramic coatings2Phase particles, and Al2O3The ceramic coating is distributed with tiny pores.
Example 3
The difference between this example and example 2 is: the nickel-based alloy in the step (1) is Ni-Cr-Mo; na in step (3)2WO4Has a concentration of 8g/L, Na2The concentration of S is 16 g/L; in the step 4, the forward current density is 3A/cm within the time range of 0-50 s3The reverse current density is 2A/cm3(ii) a After 50s, adopting a forward current density of 4A/cm3(ii) a The rest is the same as in example 2.
The coefficient of friction of the wear-resistant coating on the surface of the nickel-based alloy prepared in example 3 at room temperature has a plateau value of about 0.21, which is lower than that of MoS prepared by powder sintering2The optimum friction coefficient of the reinforced NiCr alloy (about 0.36) is lower than that of single Al obtained by micro-arc oxidation2O3The friction coefficient of the coating is 0.3-0.4.
Example 4
The difference between this example and example 3The method comprises the following steps: in step 3 Na2WO4Has a concentration of 10g/L, Na2The S concentration is 20g/L, Na3PO4The concentration is 12 g/L, NaOH, and the concentration is 1.5 g/L; in the step (4), the forward current density is 4A/cm within the time range of 0-50 s3The reverse current density is 2A/cm3(ii) a After 50s, adopting a forward current density of 5A/cm3The reverse current density was 2.5A/cm3(ii) a The rest is the same as in example 3.
From FIG. 3, it can be seen that the wear rate of the wear-resistant coating on the surface of the nickel-based alloy in the embodiment 1-4 is 1.6-2.3 × 10-5mm3In the/N.m range, lower than that of MoS prepared by powder sintering2The wear rate of the enhanced NiCr alloy is (4.6-8.1) multiplied by 10-5 mm3N.m. because the surface of the nickel-based alloy is dipped with the in-situ ceramic Al formed by micro-arc oxidation of the aluminum coating2O3The hardness and the strength of the phase are high, the plastic deformation is difficult in the friction process, and the friction adhesion is difficult to generate, so that the wear rate is reduced; on the other hand, the preparation of the aluminized layer on the corroded nickel-based alloy surface is beneficial to enhancing the mechanical bonding strength of the aluminized layer and the nickel-based alloy matrix, meanwhile, the annealing treatment of the hot-dipped aluminized layer promotes the hot-dipped aluminized layer and the nickel-based alloy matrix to form a NiAl diffusion layer with metallurgical bonding, and the micro-arc oxidation process forms Al on the surface of the aluminized layer in situ2O3The enhancement of the interface strength obviously reduces the adhesion of the coating in the friction process, improves the wear resistance of the nickel-based alloy, and further illustrates that the forming method of the wear-resistant coating on the surface of the nickel-based alloy provided by the invention can effectively improve the friction performance of the nickel-based alloy.
Comparative example 1
The specific preparation process is the same as that of the example 1, except that the step (2) directly prepares the aluminized layer on the surface of the Ni-Cr nickel-based alloy without adopting the aluminized layer to anneal for 2 hours at 250 ℃ in the argon protection environment, and the micro-arc oxidation process prepares the ceramic coating.
Comparative example 2
The specific preparation process is the same as that of example 1, except that the step (3) does not adopt segmented forward/reverse current, and directly adopts constant current density of 2A/cm3To proceed withAnd (4) carrying out oxidation treatment to obtain the micro-arc oxidized ceramic coating.
And comparing the wear-resistant performance of the micro-arc oxidation wear-resistant coating obtained in the comparative example 1-2. In the comparative example 1, the aluminizing layer is not subjected to annealing treatment at 250 ℃ under the argon protection environment, no diffusion layer is arranged between the aluminizing layer and the Ni-Cr nickel-based alloy substrate interface, the interface bonding capacity is reduced, and in the friction process, under the circulating action of friction shear stress parallel to the friction direction, the shearing strength of aluminum in the aluminizing layer is low, and the micro-arc oxidation porous coating aggravates the non-uniformity of the stress of the coating, so that the regional adhesive wear of the coating is generated, and the wear rate is increased (3.8 multiplied by 10) (3.8)-5 mm3N.m). For the comparative example 2, which does not adopt the sectional forward/reverse current mode for the micro-arc oxidation treatment, the change range of the pore size in the film layer is large, the stress is not uniform under the cyclic action of the friction shear stress in the friction process, the viscous abrasion is easily generated in the area with large stress, and the abrasion of the coating is aggravated (4.3 multiplied by 10)-5 mm3N.m), therefore, the invention can show that the wear resistance of the coating is improved under the dual actions of the NiAl diffusion layer formed on the aluminum-dipped layer/nickel-based alloy interface and the constant-current micro-arc oxidation process controlled by the cooperation of the sectional forward/reverse current.
Claims (10)
1. The nickel-based alloy surface wear-resistant coating is characterized in that: comprises a nickel-based alloy matrix, wherein Al grows on the surface of the nickel-based alloy matrix in situ2O3Ceramic layer and WS having lubricating function2Wear resistant coating of particles, said WS2Particles dispersed in Al2O3In the ceramic layer.
2. The preparation method of the wear-resistant coating on the surface of the nickel-based alloy according to claim 1, which is characterized by comprising the following steps:
(1) pretreating the nickel-based alloy, and then corroding the surface by adopting a hydrofluoric acid dilute solution to obtain a rough surface;
(2) preparing an aluminum-dipped layer on the surface of the nickel-based alloy with the rough surface by adopting an inert argon assisted aluminum dipping process, and annealing the aluminum-dipped layer in an argon protection environment to form a NiAl diffusion layer between the aluminum-dipped layer and the nickel-based alloy;
(3) taking Na2WO4、Na2S、Na3PO4Mixing NaOH and water to prepare a mixed solution;
(4) placing the nickel-based alloy aluminized layer obtained in the step (2) in the mixed solution obtained in the step (3), carrying out oxidation treatment by using a constant-current micro-arc oxidation process under the cooperative control of sectional forward/reverse current, and forming Al on the surface of the aluminized layer in situ2O3Ceramic layer and WS2The particles are compounded with the reinforced wear-resistant coating.
3. The method for preparing the wear-resistant coating on the surface of the nickel-based alloy according to claim 2, wherein the hot-dip aluminizing process assisted by inert argon in the step (2) specifically comprises the following steps: heating pure aluminum with the purity of 99.5% to 690-720 ℃ in a vacuum furnace to obtain pure aluminum liquid, filling argon into the vacuum furnace until the pressure in the vacuum furnace is 0.1-0.2 MPa, and immersing the nickel-based alloy with the rough surface into the pure aluminum liquid for 10-30 min.
4. The preparation method of the wear-resistant coating on the surface of the nickel-based alloy according to claim 2, wherein in the step (2), the annealing temperature is 250-400 ℃, and the annealing time is 1-2 hours.
5. The preparation method of the wear-resistant coating on the surface of the nickel-base alloy according to claim 2, wherein in the step (2), the thickness of the aluminum-impregnated layer is 500-1000 μm.
6. The method for preparing the wear-resistant coating on the surface of the nickel-based alloy as claimed in claim 2, wherein in the step (3), Na is added2WO4、Na2S、Na3PO4And NaOH in a mass ratio of 6-10: 10-20: 7-12: 1 to 1.5.
7. The nickel laminate of claim 2The preparation method of the gold surface wear-resistant coating is characterized in that in the step (4), the constant-current micro-arc oxidation process controlled by the sectional forward/reverse current in a coordinated mode specifically comprises the following steps: the forward current density is 2-4A/cm within 0-50 s3The reverse current density is 1.5-2A/cm3(ii) a After 50s, the forward current density is 3-5A/cm3The reverse current density is 2-2.5A/cm3。
8. The preparation method of the wear-resistant coating on the surface of the nickel-base alloy as claimed in claim 2, wherein in the step (1), the pretreatment specifically comprises the following steps: and (4) polishing the nickel-based alloy to a mirror surface by adopting sand paper and diamond grinding paste.
9. The preparation method of the wear-resistant coating on the surface of the nickel-based alloy as claimed in claim 2, wherein in the step (1), the corrosion time is 3-10 s.
10. The method for preparing the wear-resistant coating on the surface of the nickel-based alloy according to claim 2, which is characterized in that: the nickel-based alloy is any one of Ni-Cr alloy, Ni-Cr-Mo alloy and Ni-Cr-Fe alloy.
Priority Applications (1)
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