CN114875400A - Wear-resistant coating for ultra-high-speed laser cladding - Google Patents
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Abstract
The invention belongs to the field of metal materials, and particularly relates to a wear-resistant coating for ultrahigh-speed laser cladding. In order to solve the problems, the invention prepares a wear-resistant coating for ultra-high-speed laser cladding, provides alloy composite powder and wear-resistant filler, utilizes water, albite powder, PVDF and sodium hexametaphosphate as raw materials, obtains a sintering product with a laminated structure after ball milling, freezing, freeze drying and sintering, and obtains the nitrogen-doped wear-resistant filler by adding liquid polyacrylonitrile oligomer into the sintering product and carrying out co-ball milling, thereby increasing the wear resistance of the coating and simultaneously improving the bonding effect between the coating and a matrix.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a wear-resistant coating for ultrahigh-speed laser cladding.
Background
The laser processing technology has the widest applicability and the largest technical potential in the technical field of laser. The laser has wide material processing applicability, and can realize metal material processing, ceramic material processing, composite material processing, semiconductor material processing and the like. The high-speed laser cladding technology is a novel surface modification technology which is started in recent years, and by changing the intersection position of laser and powder flow, a cladding layer formed at an extremely high scanning speed has the characteristics of good forming quality, low dilution, high efficiency and high bonding strength, and has unique advantages compared with the traditional surface modification technology.
The Chinese patent with the application number of 201710285323.3 discloses a titanium-based laser cladding coating and a preparation method thereof, wherein the laser cladding coating comprises the following powder: C. w, Al, B, V, Be and the balance of Ti; preparing a coating by laser cladding; the obtained coating has high hardness and good wear resistance and corrosion resistance in a high-temperature working environment; the high-temperature wear-resistant coating obtained on the surface of the titanium alloy has no slag inclusion or bubbles, and the cladding layer and the matrix have high bonding degree.
The Chinese patent with the application number of 201811298587.3 discloses laser cladding coating powder and a preparation method thereof, wherein the laser cladding coating powder comprises the following components: TiAl powder and B powder; the preparation method comprises the steps of metal matrix selection and pretreatment, powder proportioning and ball milling, powder presetting, laser cladding, and CO (carbon dioxide) passage of TiAl and B 2 The laser beam reacts in situ to generate TiB and TiB on the surface of the metal substrate 2 The TiAl-based alloy coating serving as a reinforcing phase has the advantages of higher hardness, good wear resistance and corrosion resistance, and good metallurgical bonding and bonding condition between the laser cladding coating and a substrate.
However, in the prior art, because the mismatch of coefficients of expansion with heat and contraction with cold often causes stress cracking, how to better combine the coating and the substrate is a hot spot of research.
Disclosure of Invention
In order to solve the problems, the invention provides a wear-resistant coating for ultra-high-speed laser cladding, and wear-resistant fillers are introduced into metal powder, so that the wear resistance of the coating is improved, and the bonding effect between the coating and a matrix is improved.
The technical scheme for solving the problems is as follows:
a wear-resistant coating for ultra-high-speed laser cladding comprises alloy composite powder and wear-resistant filler, and the mixture ratio is as follows: 90-96% of iron-based metal powder and 4-10% of wear-resistant filler, wherein the iron-based metal powder comprises the following chemical components in percentage by mass: 5.0-10.0% of Cr, 2.0-6.0% of Mo, 2.5-15.5% of V, 6.0-14.0% of W, 8.0-16.0% of Co, 9.0-16.0% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Fe and inevitable impurities.
Further, the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing water, albite powder, PVDF and sodium hexametaphosphate, then carrying out ball milling, carrying out bi-directional freezing after the ball milling is finished, taking out the blank after the cold freezing is finished, carrying out freeze drying, and sintering the blank after the freeze drying is finished;
s2, putting the sintered product obtained in the step S1 into a ball mill, adding liquid polyacrylonitrile oligomer after ball milling, continuing ball milling after uniformly stirring, taking out and drying after ball milling is finished;
and S3, placing the dried sample in a tube furnace, carrying out high-temperature treatment in an inert atmosphere, grinding the sample subjected to high-temperature treatment, and obtaining the required wear-resistant filler after grinding.
The invention has the following beneficial effects:
the method uses water, albite, PVDF and sodium hexametaphosphate as raw materials, and comprises the steps of ball milling, freezing, freeze drying and sintering to obtain a layered wear-resistant filler precursor, mixing the layered wear-resistant filler precursor with a liquid polyacrylonitrile oligomer, ball milling, drying, performing high-temperature treatment and grinding to obtain a nitrogen-doped wear-resistant filler, and further improves the wear resistance of the prepared coating and enhances the binding effect between the coating and a matrix material by utilizing the characteristics of stable structure, strong bonding force in molecules, high stability and good wear resistance of the obtained wear-resistant filler.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
The proportion of the alloy composite powder and the wear-resistant filler is as follows: 90% of iron matrix metal powder and 10% of wear-resistant filler, wherein the iron matrix metal powder comprises the following chemical components in percentage by mass: 5.0% of Cr, 2.0% of Mo, 2.5% of V, 14.0% of W, 16.0% of Co, 9.0% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Fe and inevitable impurities.
The preparation method of the wear-resistant filler comprises the following steps:
s1, mixing water, albite powder, PVDF and sodium hexametaphosphate according to a mass ratio of 1:8:1:1, putting the mixture into a ball mill for ball milling, wherein the ball milling condition is 300r/min, the ball milling time is 5 hours, PVDF is used as a binder, sodium hexametaphosphate is used as a dispersing agent, obtaining slurry after the ball milling is finished, pouring the slurry into a mold for bi-directional freezing, taking out a blank after cold freezing, and freeze-drying under the conditions of 10Pa, -50 ℃, freeze-drying for 48 hours until ice crystals are completely sublimated, sintering the blank after the cold freeze-drying is finished, and the sintering condition is that: sintering at 1250 ℃ for 3h to finally obtain a layered wear-resistant filler precursor;
s2, putting the sintered product obtained in the step S1 into a ball mill for ball milling, wherein the ball milling condition is 400r/min and 3 h; after the ball milling is finished, adding liquid polyacrylonitrile oligomer into the mixture, stirring the mixture evenly, and continuing ball milling under the ball milling conditions that: 200r/min, 9h, drying for 4h at 230 ℃ after the ball milling is finished;
s3, placing the dried sample in a tube furnace, and carrying out high-temperature treatment under the nitrogen atmosphere, wherein the conditions of the high-temperature treatment are as follows: the heating rate is 3 ℃/min, the temperature is increased to 900 ℃, and the temperature is kept for 6 h; and grinding the sample subjected to high-temperature treatment for 4 hours to obtain the required wear-resistant filler.
A preparation method of a wear-resistant coating for ultra-high-speed laser cladding comprises the following steps:
t1, preparing the raw materials according to the alloying proportion of the components of the raw materials, uniformly mixing, carrying out vacuum melting on steel ingots, applying medium-frequency induction heating to melt the steel ingots, adopting a gas atomization method to prepare powder, collecting the powder, carrying out particle size screening, and uniformly mixing the screened alloy composite powder and the wear-resistant particles in a mixer according to the corresponding proportion to obtain the wear-resistant alloy powder; wherein the vacuum degree of the smelting chamber is 10 -1 Pa, the pressure of the spraying gas argon is 1.8 MPa; screening alloy composite powder with the granularity range of 10-100 mu m and wear-resistant particles with the granularity range of 10-100 mu m;
t2, wiping the surface of the workpiece by using ethanol to remove oil and rust, installing and positioning the workpiece, and filling the composite powder obtained in the step T1 into a powder feeder;
t3, setting laser power, spot diameter, laser scanning speed and powder feeding speed, and starting ultrahigh laser cladding equipment; wherein the laser power is 1kw, the spot diameter is 1mm, the laser scanning speed is 22m/min, and the powder feeding speed is 5 kg/h;
t4, setting ultrasonic power and ultrasonic frequency, starting ultrasonic impact equipment, and enabling an ultrasonic impact head to act on a specific area of a cladding coating;
t5, after finishing cladding processing, naturally cooling the coating to room temperature; cleaning with anhydrous ethanol, and air drying.
Example 2
The proportion of the alloy composite powder and the wear-resistant filler and the chemical components and the mass percentage of the iron-based metal powder are different, and the iron-based metal powder comprises the following specific components in percentage by mass: 96% of iron matrix metal powder and 4% of wear-resistant filler, wherein the iron matrix metal powder comprises the following chemical components in percentage by mass: 10.0% of Cr, 6.0% of Mo, 15.5% of V, 6.0% of W, 8.0% of Co, 16.0% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance Fe and inevitable impurities.
The preparation process of the wear-resistant filler has different process parameters, and specifically comprises the following steps: the ball milling condition in the step S1 is 500r/min, and the ball milling is carried out for 7 h; the conditions for freeze-drying were: freeze drying at 10Pa and-50 deg.C for 54 hr; the sintering conditions after freeze drying are as follows: sintering at 1350 ℃ for 5 h; in step S2, the ball milling conditions of the sintered product are: 400r/min for 5 h; the ball milling conditions after adding the liquid polyacrylonitrile oligomer are as follows: 400r/min for 11 h; the drying conditions after ball milling were: drying at 280 ℃ for 6 h; in step S3, the conditions of the tube furnace high-temperature treatment are: the heating rate is 5 ℃/min, the temperature is increased to 1200 ℃, and the temperature is kept for 8 h.
In the preparation process of the wear-resistant coating for ultra-high-speed laser cladding, the adopted process parameters are different, and specifically the following steps are adopted: vacuum degree of the smelting chamber is 10 -2 Pa, spraying powder gas argon pressure 3.8 MPa; the laser power is 2kw, the diameter of a light spot is 1mm, the laser scanning speed is 35m/min, and the powder feeding speed is 7 kg/h.
The rest of the parameters, conditions and preparation were as in example 1.
Example 3
Compared with the embodiment 1, the proportion of the alloy composite powder and the wear-resistant filler and the chemical components and the mass percentage of the iron-based metal powder are different, and specifically: 98% of iron matrix metal powder and 2% of wear-resistant filler, wherein the iron matrix metal powder comprises the following chemical components in percentage by mass: 8.0% of Cr, 4.0% of Mo, 10.0% of V, 12.0% of W, 12.0% of Co, 14.0% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Fe and inevitable impurities.
The preparation process of the wear-resistant filler has different process parameters, and specifically comprises the following steps: the ball milling condition in the step S1 is 400r/min, and the ball milling is carried out for 6 h; the conditions for freeze-drying were: freeze drying at-50 deg.c under 10Pa for 52 hr; the sintering conditions after freeze drying are as follows: sintering at 1300 ℃ for 4 h; in step S2, the ball milling conditions of the sintered product are: 400r/min for 5 h; the ball milling conditions after adding the liquid polyacrylonitrile oligomer are as follows: 300r/min, 10 h; the drying conditions after ball milling were: drying at 250 deg.C for 5 h; in step S3, the conditions of the tube furnace high-temperature treatment are: the heating rate is 4 ℃/min, the temperature is raised to 1100 ℃, and the temperature is kept for 7 h.
In the preparation process of the wear-resistant coating for ultra-high-speed laser cladding, the adopted process parameters are different, and specifically the following steps are adopted: vacuum degree of the smelting chamber is 10 -2 Pa, the pressure of the spraying gas argon is 2.2 MPa; the laser power is 2kw, the diameter of a light spot is 1mm, the laser scanning speed is 30m/min, and the powder feeding speed is 6 kg/h.
The rest of the parameters, conditions and preparation were as in example 1.
Comparative example 1
Compared with the embodiment 3, in the preparation process of the wear-resistant filler, the sintered product is directly ground to be used as the wear-resistant filler, and the subsequent nitrogen doping step is not carried out, namely the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing water, albite powder, PVDF and sodium hexametaphosphate according to a mass ratio of 1:8:1:1, putting the mixture into a ball mill for ball milling for 6 hours under the ball milling condition of 400r/min, pouring the slurry into a mold for bi-directional freezing, taking out a blank after freezing for freeze drying under the conditions of 10Pa to-50 ℃, freeze drying for 52 hours until ice crystals are completely sublimated, sintering the blank after freeze drying, wherein the sintering conditions are as follows: sintering at 1300 ℃ for 4h to finally obtain a layered wear-resistant filler precursor;
s2, putting the sintered product obtained in the step S1 into a ball mill for ball milling, wherein the ball milling condition is 400r/min and 5 hours; and (3) continuing ball milling after finishing, wherein the ball milling conditions are as follows: 300r/min, 10h, drying for 5h at 250 ℃ after the ball milling is finished;
s3, placing the dried sample in a tube furnace, and carrying out high-temperature treatment in a nitrogen atmosphere, wherein the conditions of the high-temperature treatment are as follows: the heating rate is 4 ℃/min, the temperature is raised to 1100 ℃, and the temperature is kept for 7 h; and grinding the sample subjected to high-temperature treatment for 4 hours to obtain the required wear-resistant filler.
The rest of the parameters, conditions and preparation were as in example 3.
Comparative example 2
Compared with the embodiment 3, the process of introducing ammonia gas is adopted when nitrogen doping is carried out, namely the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing water, albite powder, PVDF and sodium hexametaphosphate according to a mass ratio of 1:8:1:1, putting the mixture into a ball mill for ball milling for 6 hours under the ball milling condition of 400r/min, pouring the slurry into a mold for bi-directional freezing, taking out a blank after freezing for freeze drying under the conditions of 10Pa to-50 ℃, freeze drying for 52 hours until ice crystals are completely sublimated, sintering the blank after freeze drying, wherein the sintering conditions are as follows: sintering at 1300 ℃ for 4h to finally obtain a layered wear-resistant filler precursor;
s2, putting the sintered product obtained in the step S1 into a ball mill for ball milling, wherein the ball milling condition is 400r/min and 3 h; after the ball milling is finished, the ball milling is continued by uniformly stirring, and the ball milling conditions are as follows: 200r/min, 9h, drying for 4h at 230 ℃ after the ball milling is finished;
s3, placing the dried sample in a tubular furnace, firstly introducing nitrogen to exhaust air in the tube, and introducing ammonia gas to perform high-temperature treatment after the air in the tube is exhausted, wherein the conditions of the high-temperature treatment are as follows: the heating rate is 3 ℃/min, the temperature is increased to 900 ℃, and the temperature is kept for 6 h; and grinding the sample subjected to high-temperature treatment for 4 hours to obtain the required wear-resistant filler.
The rest of the parameters, conditions and preparation were as in example 3.
Comparative example 3
Compared with the embodiment 3, in the preparation process of the wear-resistant filler, the albite powder is replaced by the akermanite powder, and the other raw materials are not changed, namely the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing water, akermanite powder, PVDF and sodium hexametaphosphate according to a mass ratio of 1:8:1:1, putting the mixture into a ball mill for ball milling for 6 hours under the ball milling condition of 400r/min, pouring the slurry into a mold for bi-directional freezing, taking out the blank after freezing for freeze drying under the conditions of 10Pa to-50 ℃, freeze drying for 52 hours until ice crystals are completely sublimated, sintering the blank after freeze drying, wherein the sintering conditions are as follows: sintering at 1300 ℃ for 4h to finally obtain a layered wear-resistant filler precursor;
s2, putting the sintered product obtained in the step S1 into a ball mill for ball milling, wherein the ball milling condition is 400r/min and 5 hours; after the ball milling is finished, adding liquid polyacrylonitrile oligomer into the mixture, stirring the mixture evenly, and continuing ball milling under the ball milling conditions that: 300r/min, 10h, drying for 5h at 250 ℃ after the ball milling is finished;
s3, placing the dried sample in a tube furnace, and carrying out high-temperature treatment under the nitrogen atmosphere, wherein the conditions of the high-temperature treatment are as follows: the heating rate is 4 ℃/min, the temperature is raised to 1100 ℃, and the temperature is kept for 7 h; and grinding the sample subjected to high-temperature treatment for 4 hours to obtain the required wear-resistant filler.
The rest of the parameters, conditions and preparation were as in example 3.
And (4) relevant testing:
the composite powders prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to the relevant tests, and the test performance parameters thereof are shown in Table 1.
TABLE 1
| Group of | Particle size μm | Fluidity s/50g | Sphericity% | D 50 /μm |
| Example 1 | 10-100 | 44 | 91 | 43 |
| Example 2 | 10-100 | 42 | 92 | 40 |
| Example 3 | 10-100 | 36 | 94 | 38 |
| Comparative example 1 | 10-100 | 56 | 82 | 55 |
| Comparative example 2 | 10-100 | 52 | 84 | 52 |
| Comparative example 3 | 10-100 | 50 | 86 | 50 |
The wear-resistant coatings for ultra high speed laser cladding prepared in examples 1 to 3 and comparative examples 1 to 3 were tested for surface properties, and the results are shown in table 2.
TABLE 2
As can be seen from the above test results, the relevant properties of examples 1 to 3 are further improved as compared with those of comparative examples 1 to 3; comparing the embodiment 3 with the comparative example 1, it can be found that in the preparation process of the wear-resistant filler, the nitrogen-containing wear-resistant filler is obtained by adding the liquid polyacrylonitrile oligomer for post-treatment, and when the prepared composite powder is fused with the matrix material in the preparation process of the wear-resistant coating by utilizing ultra-high-speed laser cladding, lone-pair electrons exist on the N element contained in the prepared composite powder, and coordinate bonds are formed between the lone-pair electrons and empty tracks provided by the metal elements contained in the matrix material, so that the binding effect between the composite powder and the matrix material is enhanced. It is found from comparison between comparative example 2 and example 3 that the effect of nitrogen doping by introducing ammonia gas is lower than that of liquid polyacrylonitrile oligomer, probably because the damage to the structure of the sintered product is not obvious when the treatment is performed by introducing ammonia gas, and the nitrogen doping amount and the existence form are greatly limited. The test results of the comparative example 3 and the example 3 show that the performance of the albite powder is reduced after the albite powder is replaced by the albite powder, which indicates that the structure of the albite powder can enhance the bonding strength between the prepared coating and the base material after the albite powder is treated.
The iron-based cladding material has low price and good wear resistance, has better wettability and similar physical properties with an iron-based matrix, is beneficial to better combining the coating and the matrix, and reduces the problems of stress cracking and coating falling caused by the mismatching of thermal expansion coefficients.
The pyroxene has small porosity, low coarse particle content, high durability and uniform structure, and has excellent mechanical property due to the unique layered structure and fine microstructure of the pyroxene. Compared with the traditional preparation method for creating a unidirectional oriented structure in the preparation process, the preparation method adopts a bidirectional refrigeration method to regulate and control the laminated structure of the preparation material, and due to the existence of the special laminated structure, when the material is fractured, crack deflection and lamella slippage can occur, and the crack deflection can generate a longer fracture path, so that more energy can be absorbed, and the enhancement effect is achieved; at the same time, on the microcosmic aspect, when the layered wear-resistant filler is broken, the lamella is pulled out, and the sliding of the lamella in the process needs to break various interface binding forces of mineralization bridges among the lamellae, inelastic mineralization nano-structure connection and interlocking effect among the lamellae, so that a large amount of energy absorption is further enhanced. Furthermore, the obtained sintering product with the layered structure and the liquid polyacrylonitrile oligomer are subjected to co-ball milling to obtain the nitrogen-doped wear-resistant filler, and in the preparation process of the wear-resistant coating, a coordination bond is formed between an N element contained in the prepared wear-resistant filler powder and a vacant track provided by a metal element contained in the matrix material in a molten state, so that the binding effect between the coating and the matrix material is effectively improved; in the process of preparing the wear-resistant coating by utilizing ultra-high-speed laser cladding, the prepared composite powder part can form solid solution with a matrix material, and part of the composite powder can be directly precipitated as a second phase.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The wear-resistant coating for ultra-high-speed laser cladding is characterized by comprising alloy composite powder and wear-resistant filler, wherein the mixture ratio of the alloy composite powder to the wear-resistant filler is as follows: 90-96% of iron-based metal powder and 4-10% of wear-resistant filler, wherein the iron-based metal powder comprises the following chemical components in percentage by mass: 5.0-10.0% of Cr, 2.0-6.0% of Mo, 2.5-15.5% of V, 6.0-14.0% of W, 8.0-16.0% of Co, 9.0-16.0% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Fe and inevitable impurities.
2. The wear-resistant coating for ultra-high speed laser cladding as claimed in claim 1, wherein the powder has D50 of 35-50 μm, fluidity of 31-45s/100g, and sphericity not less than 94%.
3. The wear-resistant coating for ultra-high speed laser cladding according to claim 1, wherein the wear-resistant filler is prepared by the following steps:
s1, mixing water, albite powder, PVDF and sodium hexametaphosphate, then carrying out ball milling, carrying out bi-directional freezing after the ball milling is finished, taking out the blank after the cold freezing is finished, carrying out freeze drying, and sintering the blank after the freeze drying is finished;
s2, putting the sintered product obtained in the step S1 into a ball mill, adding liquid polyacrylonitrile oligomer after ball milling, continuing ball milling after uniformly stirring, taking out and drying after ball milling is finished;
and S3, placing the dried sample in a tube furnace, carrying out high-temperature treatment in an inert atmosphere, grinding the sample subjected to high-temperature treatment, and obtaining the required wear-resistant filler after grinding.
4. The wear-resistant coating for ultra-high speed laser cladding as claimed in claim 3, wherein in step S1, the ball milling condition is 300-500r/min, and the ball milling time is 5-7 h; the conditions for freeze-drying were: freeze drying at 10Pa and-50 deg.C for 48-54 h; the sintering conditions after freeze drying are as follows: 1250 and 1350 ℃ for 3 to 5 hours.
5. The wear-resistant coating for ultra-high speed laser cladding as claimed in claim 3, wherein in step S2, the ball milling conditions of the sintered product are as follows: 400-500r/min for 3-5 h; the ball milling conditions after adding the liquid polyacrylonitrile oligomer are as follows: 200-400r/min, 9-11 h; the drying conditions after ball milling are as follows: drying at the temperature of 230 ℃ and 280 ℃ for 4-6 h.
6. The wear-resistant coating for ultra high speed laser cladding as claimed in claim 3, wherein in step S3, the tube furnace high temperature treatment conditions are as follows: the heating rate is as follows: 3-5 ℃/min, raising the temperature to 900-.
7. The method for preparing a wear-resistant coating for ultra-high speed laser cladding according to any one of claims 1 to 6, comprising the steps of:
t1, alloying and proportioning raw material components, mixing, carrying out vacuum melting on steel ingots, applying medium-frequency induction heating to melt the steel ingots, adopting a gas atomization method to prepare powder, and carrying out particle size screening after the powder is obtained;
t2, deoiling and derusting the workpiece, installing and positioning, and loading the powder obtained in the step T1 into a powder feeder;
t3, setting laser power, spot diameter, traveling speed and powder feeding rate, and starting ultrahigh laser cladding equipment;
t4, setting ultrasonic power and ultrasonic frequency, starting ultrasonic impact equipment, and enabling an ultrasonic impact head to act on a specific area of a cladding coating;
t5, after finishing cladding processing, naturally cooling the coating to room temperature; cleaning with anhydrous ethanol, and air drying.
8. The method for preparing an abrasion-resistant coating for ultra-high speed laser cladding as claimed in claim 7, wherein the vacuum degree of the melting chamber in step T1 is 10 -1 -10 -2 Pa, and the argon pressure of the powder injection gas is 1.8-3.8 MPa.
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Denomination of invention: A wear-resistant coating for ultra high speed laser cladding Effective date of registration: 20230807 Granted publication date: 20221213 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: China Machinery New Material Research Institute (Zhengzhou) Co.,Ltd. Registration number: Y2023980050871 |
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