CN117721461A - Wear-resistant corrosion-resistant coating and preparation method thereof - Google Patents
Wear-resistant corrosion-resistant coating and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
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- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 claims abstract description 49
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Abstract
The invention discloses a wear-resistant and corrosion-resistant coating and a preparation method thereof, wherein the preparation method specifically comprises the following steps: s1: pretreating the surface of a substrate; s2: preparing a stellite alloy coating on the surface of a substrate by adopting laser cladding; s3: and preparing a TiN coating or a CrAlN coating on the surface of the stellite alloy coating by adopting multi-arc ion plating, so as to prepare the wear-resistant and corrosion-resistant coating on the surface of the substrate. The wear-resistant corrosion-resistant coating can effectively improve the wear-resistant corrosion-resistant performance of the part, ensure the stability and safety of the part in the service process, and prolong the service life of the part.
Description
Technical Field
The invention belongs to the technical field of protective coatings, and particularly relates to a wear-resistant corrosion-resistant coating and a preparation method thereof.
Background
The fluid mechanical equipment is an important component part of the equipment manufacturing industry in China, and the pump equipment serving as one of core products is a mechanical device for converting mechanical energy of a prime motor into kinetic energy of a fluid medium so as to realize the transportation or pressurization of the fluid medium, and is self-evident as a heart of the modern industry; the method is widely applied to the fields of mines, nonferrous metals, ferrous metals, coal chemical industry, petroleum and petrochemical industry, electric power, municipal administration, nuclear industry, national defense and the like, and is the most widely applied universal machine in national economy.
The pulp pump is used as equipment for pumping pulp in a mineral processing plant, the service working condition of the pump equipment is complex, variable and severe, for example, core parts such as an impeller of the pulp pump, a pump shaft and the like are subjected to cavitation, abrasion, corrosion and the like in the operation process, abrasion and metal fatigue are easily caused, and the service life and the unit operation efficiency are seriously influenced. The pump equipment in China has huge stock, and the loss caused by the failure of corrosion, abrasion and the like of the core parts of the pump is huge. If effective surface treatment measures can be adopted, huge losses of value caused by the failure of core parts of pump equipment can be recovered, and hundreds of billions of yuan can be saved for pump equipment application enterprises each year.
The wear and corrosion of pulp pumps can be categorized into three categories:
1. erosion wear
During operation of the pulp pump, solid particles entrained in the liquid strike the surface of the flow member at a certain velocity, causing material loss. The erosive wear mechanism can be classified into cutting wear, deformation fatigue wear, and cutting and deformation combined wear, according to analysis of the wear surface.
2. Cavitation abrasion
In operation of the pulp pump, in a local area of the overflow portion, the absolute pressure of the liquid entering is reduced to the vaporization pressure of the temperature, and the liquid begins to vaporize, generating steam and forming bubbles. These bubbles flow forward with the liquid and when they reach a certain high pressure they contract sharply until collapse. At the same time of bubble agglomeration, the liquid particles fill the gaps at high speed, so that strong impact is generated on the metal surface, the metal surface is fatigued and peeled off, the material loss is caused, and the metal surface is honeycomb-shaped when serious. The locations where cavitation typically occurs are the impeller outlet and the volute inlet.
3. Corrosion and abrasion
When the conveying medium has a certain pH value, the overflow parts of the pulp pump are corroded and worn, namely the materials are lost under the combined action of the corrosion and the wear. The corrosion can be divided into chemical corrosion, which is the direct chemical reaction of metal and liquid, and electrochemical corrosion, which is the formation of micro-cells on the surface of metal under the action of liquid medium, resulting in material loss.
At present, many domestic users prepare WC hard alloy, nickel base alloy, iron base amorphous and other coatings on the surfaces of key parts of the pulp pump, such as impellers and cone valves, in a spray welding mode, a spray coating mode and the like, the service life of the pulp pump set cannot be effectively improved, parts are required to be replaced frequently, the normal production progress of enterprises is delayed, and the cost is increased. How to improve the wear resistance and corrosion resistance of parts, ensure the stability and safety of the parts in the service process, and prolong the service life of the parts is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the wear-resistant corrosion-resistant coating and the preparation method thereof, and the wear-resistant corrosion-resistant coating can effectively improve the wear-resistant corrosion-resistant performance of parts, ensure the stability and the safety of the parts in the service process and prolong the service life of the parts.
The technical scheme of the invention is realized as follows:
the preparation method of the wear-resistant and corrosion-resistant coating comprises the following steps:
s1: pretreating the surface of a substrate;
s2: preparing a stellite alloy coating on the surface of a substrate by adopting laser cladding;
s3: and preparing a TiN coating or a CrAlN coating on the surface of the stellite alloy coating by adopting multi-arc ion plating, so as to prepare the wear-resistant and corrosion-resistant coating on the surface of the substrate.
Further, in step S1, the substrate is subjected to degreasing and rust removal treatment, then is wiped with acetone, and the operation of step S2 is performed within 1 h after wiping.
Further, the granularity of the stellite powder adopted by laser cladding is 30-60 mu m.
Further, during laser cladding, the defocus amount is + mm; the nozzle working distance is 11 mm; the laser power is 2.4-2.8 kw; the cladding speed is 15-18 m/min; the single-pass lateral movement is 0.4-0.6 mm; the powder feeding amount is 20-25 g/min; the protective air flow is 12-14L/min; the powder carrying air flow is 5-6L/min.
Further, in step S3, the method specifically includes the following steps:
s3.1: performing pre-plating treatment on the substrate after laser cladding;
s3.2: loading the substrate subjected to plating pretreatment into a vacuum cavity, and vacuumizing until the vacuum is better than 3×10 -3 Pa, opening an ion source, heating a filament to 40-60A, introducing high-purity argon gas at a speed of 50-120 sccm, etching and cleaning the substrate under a bias voltage of-200 to-250V, and removing impurities such as dust attached to the surface for 20-40 min;
s3.3: after etching is completed, N is introduced 2 And (3) air is supplied, and the rotating speed of the molecular pump is regulated, so that the air pressure of the vacuum chamber is controlled to be 1-4 Pa. Opening a target Ti or a target CrAl, gradually increasing the bias voltage from 0 to 50V to 50 to 150V, and adjusting N to 50-150A 2 Controlling the deposition air pressure at 1-4 Pa, coating the coating for 1-3 hours, and after coating the coating, cooling to room temperature along with a furnace, and then re-pressing and taking out, namely preparing the TiN coating or the CrAlN coating on the surface of the stellite coating.
Further, the specific steps of step S3.1 are as follows: firstly, polishing the laser-clad substrate to ensure that the roughness is less than 3.2 mu m, then placing the substrate in petroleum ether to scrub and remove surface greasy dirt, then sequentially placing the substrate in acetone and absolute ethyl alcohol for ultrasonic cleaning, and finally taking out the substrate and drying the substrate by nitrogen.
Further, the ultrasonic cleaning time in acetone and absolute ethyl alcohol is 15-30 min.
Further, the purities of the target Ti and the target CrAl are more than or equal to 99.9 percent.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the stellite alloy coating is prepared on the surface of the substrate by adopting laser cladding, so that the stellite alloy coating is metallurgically combined with the substrate, good bonding strength between the stellite alloy coating and the substrate is ensured, and meanwhile, the stellite alloy has the advantages of high hardness, wear resistance, corrosion resistance and the like, so that the wear resistance and corrosion resistance of the substrate can be improved; then, a TiN coating or a CrAlN coating is prepared on the surface of the stellite alloy coating by adopting multi-arc ion plating, and the TiN coating and the CrAlN coating have the advantages of high melting point, high hardness, wear resistance, corrosion resistance and the like, so that the thermal stability of a matrix can be improved, the wear resistance and corrosion resistance of the matrix are further improved, the stability and the safety of a part in the service process are ensured, and the service life of the part is prolonged.
In addition, the CrAlN coating has the characteristics of strong adhesive force, low thermal conductivity and the like, so that the bonding strength of the CrAlN coating and the stellite alloy coating can be further improved.
Drawings
FIG. 1-microscopic SEM topography of the stellite alloy coating of example 1.
Fig. 2-microscopic SEM topography of wear-resistant and corrosion-resistant coating consisting of stellite coating and TiN coating in example 1.
FIG. 3-elemental distribution of a wear and corrosion resistant coating of stellite alloy coating and TiN coating in example 1.
FIG. 4-metallographic structure of a wear-resistant corrosion-resistant coating composed of a stellite alloy coating and a TiN coating in example 2.
Detailed Description
The preparation method of the wear-resistant and corrosion-resistant coating comprises the following steps:
s1: pretreating the surface of a substrate;
s2: preparing a stellite alloy coating on the surface of a substrate by adopting laser cladding;
s3: and preparing a TiN coating or a CrAlN coating on the surface of the stellite alloy coating by adopting multi-arc ion plating, so as to prepare the wear-resistant and corrosion-resistant coating on the surface of the substrate.
Thus, the stellite alloy coating is prepared on the surface of the matrix by adopting laser cladding, so that the stellite alloy coating is metallurgically combined with the matrix, good bonding strength between the stellite alloy coating and the matrix is ensured, and meanwhile, the stellite alloy has the advantages of high hardness, wear resistance, corrosion resistance and the like, so that the wear resistance and corrosion resistance of the matrix can be improved; then, a TiN coating or a CrAlN coating is prepared on the surface of the stellite alloy coating by adopting multi-arc ion plating, and the TiN coating and the CrAlN coating have the advantages of high melting point, high hardness, wear resistance, corrosion resistance and the like, so that the thermal stability and the wear resistance and the corrosion resistance of a matrix can be improved, the stability and the safety of parts in the service process are ensured, and the service life of the parts is prolonged.
In addition, the CrAlN coating has the characteristics of strong adhesive force, low thermal conductivity and the like, so that the bonding strength of the CrAlN coating and the stellite alloy coating can be further improved.
In the specific implementation, in the step S1, the substrate is firstly subjected to oil removal and rust removal treatment, then is wiped by acetone, and the operation of the step S2 is performed in the wiped 1 h, so that the surface of the substrate is required to have roughness Ra less than 10 mu m, and defects such as pits and cracks are avoided.
In specific implementation, the granularity of the stellite powder adopted by laser cladding is 30-60 mu m. Before laser cladding, the stellite powder is placed in a vacuum furnace, then heated to 120 ℃ and kept for 2 hours for drying treatment, and then powder sieving is carried out to remove macroscopic impurity particles.
In specific implementation, the technological parameters of the laser cladding are shown in table 1.
Table 1 parameters of the stellite alloy laser cladding process
Experiments prove that the main factors influencing the laser cladding quality are as follows: laser power (kw), powder feed rate (g/min), cladding speed (m/min), shielding gas flow (L/min), etc. Among them, the laser power (kw) has a significant influence on the quality of laser cladding.
In specific implementation, the step S3 specifically includes the following steps:
s3.1: the substrate after laser cladding is subjected to plating pretreatment, which comprises the following steps: firstly, polishing a substrate subjected to laser cladding to ensure that the roughness is less than 3.2 mu m, then placing the substrate in petroleum ether to scrub and remove surface greasy dirt, placing the substrate in acetone to carry out ultrasonic cleaning for 15 min, placing the substrate in absolute ethyl alcohol to carry out ultrasonic cleaning for 15 min, and finally taking out the substrate and drying the substrate by nitrogen;
s3.2: loading the substrate subjected to plating pretreatment into a vacuum cavity, and vacuumizing until the vacuum is better than 3×10 -3 Pa, opening an ion source, heating a filament to 40-60A, introducing high-purity argon gas at a speed of 50-120 sccm, etching and cleaning the substrate under a bias voltage of-200 to-250V, and removing impurities such as dust attached to the surface for 20-40 min;
s3.3: after etching is completed, N is introduced 2 And (3) air is supplied, and the rotating speed of the molecular pump is regulated, so that the air pressure of the vacuum chamber is controlled to be 1-4 Pa. Opening a target Ti or a target CrAl with purity of more than or equal to 99.9%, gradually increasing bias voltage from 0 to-50V to-50 to-150V, and regulating target current to 50-150A by regulating N 2 Controlling the deposition air pressure at 1-4 Pa, coating the coating for 1-3 hours, and after coating the coating, cooling to room temperature along with a furnace, and then re-pressing and taking out, namely preparing the TiN coating or the CrAlN coating on the surface of the stellite coating.
The invention is described in further detail below with reference to the drawings and the detailed description.
Example 1
In the embodiment, a wear-resistant and corrosion-resistant coating is prepared on a 022Cr25Ni7Mo4N cone valve.
1. The process for preparing the stellite alloy coating on the surface of the cone valve by adopting the ultra-high-speed laser cladding equipment comprises the following steps:
1.1, the Stellite6 alloy powder with the powder granularity of 30 mu m is heated to 120 ℃ in a vacuum furnace, is preserved for 2 hours, is dried, and is sieved to remove macroscopic impurity particles.
1.2, degreasing and rust removing the surface of the part, wiping the surface by acetone, and cladding in 1 h after wiping, wherein the surface of the part is required to have roughness Ra less than 10 mu m, and the surface has no defects such as pits, cracks and the like. The actual laser cladding process parameters are shown in table 2.
TABLE 2 022Cr25Ni7Mo4N cone valve cladding process parameters
1.3 grinding and polishing the part after cladding until the roughness Ra is less than 3.2 mu m, and obtaining a microscopic SEM morphology graph of the about 3 mm laser cladding stellite coating as shown in figure 1.
The Vickers Hardness (HV) of the treated samples was measured according to GB/T4304.1-2009 0.01 ) Surface hardness testing was performed at a pressure of 100 g and dwell time of 15 s at 12 points, with one maximum and one minimum removed, as shown in table 3.
TABLE 3 surface hardness of cladding stellite alloy layer (HV 0.01 ）
| 383.3 | 406.3 | 404.6 | 388.1 | 397.9 | 392.0 | 384.9 | 394.3 | 395.9 | 388.4 |
As is clear from Table 3, the average value 393.57 HV of the Vickers hardness of the stellite alloy layer 0.01 Has good mechanical properties.
2. The physical vapor deposition process of preparing the titanium nitride coating on the surface of the part after cladding comprises the following steps:
2.1, placing the sample into petroleum ether to scrub and remove oil stains on the surface, placing the sample into acetone to carry out ultrasonic cleaning for 15 minutes, then carrying out ultrasonic cleaning in absolute ethyl alcohol for 15 minutes, finally taking out the sample, and drying the sample by nitrogen.
2.2 bias reverse sputter cleaning
Filling the sample processed in the step 2.1 into a cavity, and vacuumizing until the vacuum is better than 3 multiplied by 10 -3 Pa; opening an ion source, heating the lamp filament to 50A, introducing high-purity argon gas to 90 sccm, applying negative bias to the substrate, etching and cleaning the substrate under the bias of-230 v, and removing impurities such as dust attached to the surface, wherein the etching time is 30 min.
2.3 deposition of TiN layers
The metal Ti with purity more than or equal to 99.9% is used as a target material, the bias voltage is controlled to gradually rise from-25V to-100V, the target current is 120A, and the N is regulated 2 The air flow rate makes the air pressure of the vacuum chamber at 3 Pa, the Ti target is opened, the coating time is 1.5 h, and the coating thickness is 3 μm. After the film plating is completed, cooling to room temperature along with a furnace, and then re-pressing and taking out to obtain a coating with the thickness of about 3 mu m. As shown in the microscopic SEM morphology graph and element distribution graph of the wear-resistant corrosion-resistant coating finally obtained on the substrate as shown in the figures 2 and 3 respectively, the TiN coating has thinner thickness, wherein the Ti and N elements are mostly, meanwhile, the elements such as Cr, fe, co and the like are also present, the elements such as Co, cr, fe and the like in the stellite alloy coating are more obvious, and meanwhile, other less elements such as O, si, mn and the like are also presentAnd a quantity element indicating that a certain quantity of element diffusion occurs between the coatings and the substrate.
And testing the binding force between the TiN coating and the stellite alloy coating by using a Brookfield NanoForce scratch instrument, and measuring that the binding force between the TiN coating and the stellite alloy coating is 16N.
And respectively placing the sample coated with the stellite coating and the sample coated with the stellite alloy coating and deposited with the TiN coating on the surface of the stellite alloy coating in a sulfuric acid solution with the concentration of 1 mol/L for soaking 600 h, and then observing the corrosion condition of the sample surface, wherein the surface of the sample coated with the stellite alloy coating is obviously corroded, and the surface of the sample coated with the TiN coating on the surface of the stellite alloy coating is intact and hardly corroded.
Example 2
In this example, a wear-resistant corrosion-resistant coating was prepared on a 20Cr13 seal ring.
1. The process for preparing the stellite alloy coating on the surface of the sealing ring by adopting the ultra-high-speed laser cladding equipment comprises the following steps:
1.1, the Stellite6 alloy powder with the powder granularity of 45 mu m is heated to 120 ℃ in a vacuum furnace, is preserved for 2 hours, is dried, and is sieved to remove macroscopic impurity particles.
1.2, degreasing and rust removing the surface of the part, wiping the surface by acetone, and cladding in 1 h after wiping, wherein the surface of the part is required to have roughness Ra less than 10 mu m, and the surface has no defects such as pits, cracks and the like. The actual laser cladding process parameters are shown in table 4.
Table 4 20cr13 sealing ring laser cladding process parameters
(3) And (3) polishing the part after cladding until the roughness Ra is smaller than 3.2 mu m, and obtaining the laser cladding stellite alloy coating.
2. The physical vapor deposition process of preparing the titanium nitride coating on the surface of the part after cladding comprises the following steps:
2.1, placing the sample into petroleum ether to scrub and remove oil stains on the surface, placing the sample into acetone to carry out ultrasonic cleaning for 15 minutes, then carrying out ultrasonic cleaning in absolute ethyl alcohol for 15 minutes, finally taking out the sample, and drying the sample by nitrogen.
2.2 bias reverse sputter cleaning
Filling the sample processed in the step 2.1 into a cavity, and vacuumizing until the vacuum is better than 3 multiplied by 10 -3 Pa; opening an ion source, heating a lamp filament to 40A, introducing high-purity argon gas to 20 sccm, applying negative bias to the substrate, etching and cleaning the substrate under the bias of-200 v, and removing impurities such as dust attached to the surface, wherein the etching time is 20 min.
(3) Deposition of TiN layers
The metal Ti with purity more than or equal to 99.9% is used as a target material, the bias voltage is controlled to gradually rise from 0 to-50V, the target current is 50A, and the N is regulated 2 The air flow rate makes the air pressure of the vacuum chamber at 1 Pa, the Ti target is opened, the coating time is 2 h, and the coating thickness is 5 μm. And after coating, cooling to room temperature along with the furnace, and then re-pressing and taking out. The metallographic structure diagram of the stellite coating and the TiN coating finally obtained on the substrate is shown in fig. 4, and the metallographic structure diagram shows that the structure is uniform, the pores are few, and the coating density is good.
The abrasion-resistant and corrosion-resistant coating prepared above was subjected to the following test:
the MTS-Nano G200 nanometer hardness meter is used for measuring the hardness and the elastic modulus of the surface coating of the sealing ring, and the measurement result shows that: the coating hardness is 21.362 GPa (average value) and shows better mechanical properties.
Example 3
In the embodiment, a wear-resistant and corrosion-resistant coating is prepared on a 06Cr19Ni10 shaft sleeve.
1. The process for preparing the stellite alloy coating on the surface of the shaft sleeve by adopting the ultra-high-speed laser cladding equipment comprises the following steps:
1.1 baking the Stellite6 alloy powder with the powder granularity of 60 mu m in a vacuum furnace at the temperature of 120 ℃ for 2 hours, and then sieving the powder to remove macroscopic impurity particles.
(2) The surface of the part is degreased, derusted and wiped by acetone, and then the part is clad in 1 h, and the surface of the part is required to have roughness Ra less than 10 mu m and has no defects such as pits, cracks and the like. The actual cladding process parameters are shown in Table 5.
Table 5 06Cr19Ni10 shaft sleeve laser cladding process parameters
(3) And (3) polishing the part after cladding until the roughness Ra is smaller than 3.2 mu m, and obtaining the laser cladding stellite alloy coating.
2. The preparation method of the chromium aluminum nitrogen coating on the surface of the part after cladding by adopting physical vapor deposition comprises the following steps:
2.1, placing the sample into petroleum ether to scrub and remove oil stains on the surface, placing the sample into acetone to carry out ultrasonic cleaning for 15 minutes, then carrying out ultrasonic cleaning in absolute ethyl alcohol for 15 minutes, finally taking out the sample, and drying the sample by nitrogen.
2.2 bias reverse sputter cleaning
Loading the sample processed in step 2.1 into a cavity, closing a cavity door, and vacuumizing until the vacuum is better than 3×10 -3 Pa; opening an ion source, heating a lamp filament to 60A, introducing high-purity argon gas to 120 sccm, applying negative bias to the substrate, etching and cleaning the substrate under the bias of-200 v, and removing impurities such as dust attached to the surface, wherein the etching time is 40 min;
2.3 depositing CrAlN coating
Introducing N 2 And the rotation speed of the molecular pump is regulated, so that the air pressure of the vacuum cavity chamber is controlled to be 4 Pa, the CrAl target with purity more than or equal to 99.9% is opened, the bias voltage is controlled to gradually rise from-50V to-150V, the target current is 150A, the coating time is 3 h, and the coating thickness is 8 mu m. And after coating, cooling to room temperature along with the furnace, and then re-pressing and taking out.
Finally, it should be noted that the above-mentioned examples of the present invention are only illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. Not all embodiments are exhaustive. Obvious changes and modifications which are extended by the technical proposal of the invention are still within the protection scope of the invention.
Claims (9)
1. The preparation method of the wear-resistant and corrosion-resistant coating is characterized by comprising the following steps of:
s1: pretreating the surface of a substrate;
s2: preparing a stellite alloy coating on the surface of a substrate by adopting laser cladding;
s3: and preparing a TiN coating or a CrAlN coating on the surface of the stellite alloy coating by adopting multi-arc ion plating, so as to prepare the wear-resistant and corrosion-resistant coating on the surface of the substrate.
2. The method for producing a wear-resistant and corrosion-resistant coating according to claim 1, wherein in step S1, the substrate is subjected to degreasing and rust removal treatment, then is wiped with acetone, and the operation of step S2 is performed within 1 h after wiping.
3. The method for preparing the wear-resistant and corrosion-resistant coating according to claim 1, wherein the granularity of the stellite powder adopted for laser cladding is 30-60 μm.
4. The method for preparing the wear-resistant and corrosion-resistant coating according to claim 1, wherein the defocus amount is + mm during laser cladding; the nozzle working distance is 11 mm; the laser power is 2.4-2.8 kw; the cladding speed is 15-18 m/min; the single-pass lateral movement is 0.4-0.6 mm; the powder feeding amount is 20-25 g/min; the protective air flow is 12-14L/min; the powder carrying air flow is 5-6L/min.
5. The method for preparing the wear-resistant and corrosion-resistant coating according to claim 1, wherein in the step S3, the method specifically comprises the following steps:
s3.1: performing pre-plating treatment on the substrate after laser cladding;
s3.2: loading the substrate subjected to plating pretreatment into a vacuum cavity, and vacuumizing until the vacuum is better than 3×10 -3 Pa, opening an ion source, heating a filament to 40-60A, introducing high-purity argon gas to 50-120 sccm, etching and cleaning the substrate under the bias voltage of-200 to-250V to remove impurities such as dust attached to the surface, and etchingThe time is 20-40 min;
s3.3: after etching is completed, N is introduced 2 The rotation speed of the molecular pump is regulated, so that the air pressure of the vacuum chamber is controlled to be 1-4 Pa;
opening a target Ti or a target CrAl, gradually increasing the bias voltage from 0 to 50V to 50 to 150V, and adjusting N to 50-150A 2 Controlling the deposition air pressure at 1-4 Pa, coating the coating for 1-3 hours, and after coating the coating, cooling to room temperature along with a furnace, and then re-pressing and taking out, namely preparing the TiN coating or the CrAlN coating on the surface of the stellite coating.
6. The method for preparing a wear-resistant and corrosion-resistant coating according to claim 5, wherein the specific steps of step S3.1 are as follows: firstly, polishing the laser-clad substrate to ensure that the roughness is less than 3.2 mu m, then placing the substrate in petroleum ether to scrub and remove surface greasy dirt, then sequentially placing the substrate in acetone and absolute ethyl alcohol for ultrasonic cleaning, and finally taking out the substrate and drying the substrate by nitrogen.
7. The method for preparing the wear-resistant and corrosion-resistant coating according to claim 6, wherein ultrasonic cleaning time in acetone and absolute ethyl alcohol is 15-30 min.
8. The method for preparing the wear-resistant and corrosion-resistant coating according to claim 5, wherein the purities of the target Ti and the target CrAl are more than or equal to 99.9%.
9. The wear-resistant and corrosion-resistant coating is characterized by being prepared by adopting the preparation method of the wear-resistant and corrosion-resistant coating according to any one of claims 1-8.
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| CN202311807138.8A CN117721461A (en) | 2023-12-26 | 2023-12-26 | Wear-resistant corrosion-resistant coating and preparation method thereof |
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| CN202311807138.8A CN117721461A (en) | 2023-12-26 | 2023-12-26 | Wear-resistant corrosion-resistant coating and preparation method thereof |
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