CN116240536A - AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and preparation method thereof - Google Patents

AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and preparation method thereof Download PDF

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Publication number
CN116240536A
CN116240536A CN202211704104.1A CN202211704104A CN116240536A CN 116240536 A CN116240536 A CN 116240536A CN 202211704104 A CN202211704104 A CN 202211704104A CN 116240536 A CN116240536 A CN 116240536A
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alcrfemnti
entropy alloy
powder
laser
resistant coating
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CN202211704104.1A
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Inventor
梁文萍
徐健晏
缪强
臧恺
于嘉瑶
赵慧
李静丽
闫荣学
张猛
于海洋
尹孟娟
吴玉婷
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Nanjing University Of Aeronautics And Astronautics Wuxi Research Institute
Nanjing University of Aeronautics and Astronautics
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Nanjing University Of Aeronautics And Astronautics Wuxi Research Institute
Nanjing University of Aeronautics and Astronautics
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Publication of CN116240536A publication Critical patent/CN116240536A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium

Abstract

The invention provides an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating, which comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction. The AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating consists of Al, cr, fe, mn and Ti elements, and the prepared AlCrFeMnTi coating has compact microstructure, no wrinkle defect, excellent wear-reducing performance at 500 ℃, and improved wear resistance of 718 nickel-based alloy; the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the steps of preparing cladding powder, cleaning and preprocessing the surface of a nickel-based alloy substrate, and coating the substrate by a laser cladding process to obtain the AlCrFeMnTi high-entropy alloy coating, so that the metallurgical combination of the coating and the substrate is realized, and the substrate material can be effectively protected in a high-temperature friction environment.

Description

AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and preparation method thereof
Technical Field
The invention relates to the technical field of coating preparation, in particular to an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and a preparation method thereof.
Background
The laser cladding is a novel material surface modification and treatment technology, wherein selected coating material powder is added on the surface of a substrate by using different feeding modes, and after laser radiation, the coating material powder and a substrate surface thin layer are melted and quickly solidified at the same time, a surface coating with extremely low dilution and metallurgical bonding with the substrate material is formed. The laser cladding technology well improves the characteristics of wear resistance, thermal shock resistance, oxidation resistance and the like of the surface of the metal matrix; the laser cladding technology is energy-saving and pollution-free, meets the industrial environment-friendly requirement, and has extremely high industrial application value.
The traditional nickel-based superalloy has excellent high-temperature performance, but the expensive cost brought by a high-density microstructure limits the further application of the nickel-based superalloy; the Fe-Al-based alloy has low density and obvious cost advantage, but has insufficient yield/tensile strength and insufficient creep resistance at high temperature; low-cost constituent elements such as Cr, mn, ti and the like are added into the alloy, and the solid solution strengthening effect of high entropy is enhanced, so that the application range of the nickel-based superalloy is widened.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art, and provides an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and a preparation method thereof, which can effectively strengthen 718 the high-temperature wear-resistant performance of nickel-base alloy. The technical scheme adopted by the invention is as follows:
an alcrfemniti high-entropy alloy high-temperature wear-resistant coating, wherein: the AlCrFeMnTi high-entropy alloy coating comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction.
A preparation method of an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating, wherein: the method comprises the following steps:
s1, weighing and mixing Al powder, cr powder, fe powder, mn powder and Ti powder, and performing ball milling treatment on the mixed powder in protective gas to obtain cladding powder with the average particle size of 10-70 mu m;
s2, grinding and polishing the surface of the nickel alloy matrix, and cleaning;
s3, turning on a laser in the laser cladding device, focusing a laser beam on the surface of the nickel alloy matrix, sending cladding powder to a laser spot on the surface of the nickel alloy matrix by the laser cladding powder feeder, setting technological parameters of the laser beam, starting laser cladding in protective gas, obtaining the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating after the laser cladding process is finished,
preferably, the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the following steps: the ball milling rotating speed of the step S1 is 200-300r/min, and the ball milling time is 2-3 h.
Preferably, the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the following steps: the step S2 specifically comprises the following steps:
s21, sequentially polishing and polishing the surface of the nickel alloy matrix by using 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper, 1500# metallographic sand paper, 2000# metallographic sand paper and 2500# metallographic sand paper to remove oxide impurities on the surface of the nickel alloy matrix;
s22, carrying out ultrasonic cleaning on the surface of the nickel alloy matrix for 15-45min through absolute ethyl alcohol, and then drying.
Preferably, the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the following steps: the shielding gas in the steps S2 and S3 is argon.
Preferably, the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the following steps: in step S3, during laser cladding, the process parameters of the laser beam are as follows: the laser power is 1000W, the laser spot diameter is 5mm, the laser scanning speed is 110-140mm/min, the laser lap joint rate is 50-75%, and the powder feeding speed of the laser cladding powder feeder is 8-11g/min.
The invention has the advantages that:
the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating consists of Al, cr, fe, mn and Ti elements, and the prepared AlCrFeMnTi coating has compact microstructure, no wrinkle defect, excellent wear-reducing performance at 500 ℃, and improved wear resistance of 718 nickel-based alloy; the preparation method of the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises the steps of preparing cladding powder, cleaning and preprocessing the surface of a nickel-based alloy substrate, and coating the substrate by a laser cladding process to obtain the AlCrFeMnTi high-entropy alloy coating, so that the metallurgical combination of the coating and the substrate is realized, and the substrate material can be effectively protected in a high-temperature friction environment.
Drawings
FIG. 1 is an SEM image of the cladding powder of example 1 of the present invention.
FIG. 2 is a schematic surface view of AlCrFeMnTi coating of example 1 of the present invention.
FIG. 3 is a graph comparing the wear rates of AlCrFeMnTi coating of example 1 of the present invention and 718 nickel base alloys at 500 ℃.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
Example 1
As shown in fig. 1-3, an alcrfemniti high-entropy alloy high-temperature wear-resistant coating, wherein: the AlCrFeMnTi high-entropy alloy coating comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction.
A preparation method of an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating, wherein: the method comprises the following steps:
s1, weighing Al powder, cr powder, fe powder, mn powder and Ti powder, mixing, ball milling and screening the mixed powder in argon to obtain cladding powder with the average particle size of 10-70 mu m, wherein the ball milling speed is 200r/min, and the ball milling time is 3h;
s2, grinding and polishing the surface of the 718 nickel alloy matrix, and cleaning;
s21, sequentially polishing and polishing the surface of the 718 nickel alloy matrix by using 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper, 1500# metallographic sand paper, 2000# metallographic sand paper and 2500# metallographic sand paper to remove oxide impurities on the surface of the nickel alloy matrix;
s22, carrying out ultrasonic cleaning on the surface of the 718 nickel alloy matrix for 15min through absolute ethyl alcohol, and then drying;
s3, turning on a laser in the laser cladding device, focusing a laser beam on the surface of the nickel alloy substrate, sending cladding powder to a laser spot on the surface of the nickel alloy substrate by the laser cladding powder feeder, setting technological parameters of the laser beam, starting laser cladding in protective gas, obtaining the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating after the laser cladding process is finished, wherein the cladding treatment power is 1000W, the laser spot diameter is 5mm, the laser scanning speed is 110mm/min, the laser lap rate is 50%, and the powder feeding speed is 8g/min.
Example 2
As shown in fig. 1-3, an alcrfemniti high-entropy alloy high-temperature wear-resistant coating, wherein: the AlCrFeMnTi high-entropy alloy coating comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction.
A preparation method of an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating, wherein: the method comprises the following steps:
s1, weighing Al powder, cr powder, fe powder, mn powder and Ti powder, mixing, ball milling and screening the mixed powder in argon to obtain cladding powder with the average particle size of 10-70 mu m, wherein the ball milling speed is 250r/min, and the ball milling time is 2.5h;
s2, grinding and polishing the surface of the 718 nickel alloy matrix, and cleaning;
s21, sequentially polishing and polishing the surface of the 718 nickel alloy matrix by using 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper, 1500# metallographic sand paper, 2000# metallographic sand paper and 2500# metallographic sand paper to remove oxide impurities on the surface of the nickel alloy matrix;
s22, carrying out ultrasonic cleaning on the surface of the nickel alloy matrix for 30min through absolute ethyl alcohol, and then drying;
s3, turning on a laser in the laser cladding device, focusing a laser beam on the surface of the nickel alloy substrate, sending cladding powder to a laser spot on the surface of the nickel alloy substrate by the laser cladding powder feeder, setting technological parameters of the laser beam, starting laser cladding in protective gas, obtaining the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating after the laser cladding process is finished, wherein the cladding treatment power is 1000W, the laser spot diameter is 5mm, the laser scanning speed is 120mm/min, the laser lap rate is 70%, and the powder feeding speed is 10g/min.
Example 3
As shown in fig. 1-3, an alcrfemniti high-entropy alloy high-temperature wear-resistant coating, wherein: the AlCrFeMnTi high-entropy alloy coating comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction.
A preparation method of an AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating, wherein: the method comprises the following steps:
s1, weighing Al powder, cr powder, fe powder, mn powder and Ti powder, mixing, ball milling and screening the mixed powder in argon, and ball milling and screening AlCrFeMnTi powder to obtain cladding powder with the average particle size of 10-70 mu m, wherein the ball milling speed is 300r/min, and the ball milling time is 2h;
s2, grinding and polishing the surface of the 718 nickel alloy matrix, and cleaning;
s21, sequentially polishing and polishing the surface of the 718 nickel alloy matrix by using 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper, 1500# metallographic sand paper, 2000# metallographic sand paper and 2500# metallographic sand paper to remove oxide impurities on the surface of the nickel alloy matrix;
s22, carrying out ultrasonic cleaning on the surface of the 718 nickel alloy matrix for 15-45min through absolute ethyl alcohol, and then drying;
s3, turning on a laser in the laser cladding device, focusing a laser beam on the surface of the nickel alloy substrate, sending cladding powder to a laser spot on the surface of the nickel alloy substrate by the laser cladding powder feeder, setting technological parameters of the laser beam, starting laser cladding in protective gas, obtaining the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating after the laser cladding process is finished, wherein the power of laser cladding treatment is 1000W, the diameter of the laser spot is 5mm, the laser scanning speed is 140mm/min, the laser lap ratio is 75%, and the powder feeding speed is 11g/min.
The particle size test result of the cladding powder prepared in the embodiment 1 is shown in fig. 1, and as can be seen from fig. 1, the cladding powder has fine particle size and good fluidity, and is beneficial to air flow powder feeding in the laser cladding process.
The AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating prepared in the embodiment 1 is subjected to scanning electron microscope test, and the result is shown in figure 2, so that the coating has a compact microstructure, a flat surface and no wrinkle defect.
The wear rate of the AlCrFeMnTi high-temperature wear-resistant coating prepared in the example 1 at 500 ℃ is shown in figure 3, and compared with that of the matrix 718 nickel alloy, the wear rate of the AlCrFeMnTi coating is obviously reduced, and the AlCrFeMnTi high-temperature wear-resistant coating has excellent wear-reducing performance.
The AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating consists of Al, cr, fe, mn and Ti elements, and the prepared AlCrFeMnTi coating has compact microstructure, no wrinkle defect, excellent wear-resistant performance at 500 ℃, and improved wear resistance of 718 nickel-based alloy; the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating comprises preparation of cladding powder, cleaning pretreatment of the surface of a nickel-based alloy substrate, and coating on the substrate through a laser cladding process, so that the AlCrFeMnTi high-entropy alloy coating is obtained, metallurgical bonding of the coating and the substrate is realized, and a substrate material can be effectively protected in a high-temperature friction environment.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.

Claims (6)

1. The AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating is characterized in that: the AlCrFeMnTi high-entropy alloy coating comprises a substrate and an AlCrFeMnTi high-entropy alloy coating arranged on the substrate, wherein the AlCrFeMnTi high-entropy alloy coating comprises 20% of Al, 5% of Cr, 50% of Fe, 20% of Mn and 5% of Ti according to mass fraction.
2. A method for preparing the AlCrFeMnTi high entropy alloy high temperature wear resistant coating as claimed in claim 1, which is characterized in that: the method comprises the following steps:
s1, weighing and mixing Al powder, cr powder, fe powder, mn powder and Ti powder, and performing ball milling treatment on the mixed powder in protective gas to obtain cladding powder with the average particle size of 10-70 mu m;
s2, grinding and polishing the surface of the nickel alloy matrix, and cleaning;
s3, turning on a laser in the laser cladding device, focusing a laser beam on the surface of the nickel alloy substrate, sending cladding powder to a laser spot on the surface of the nickel alloy substrate by the laser cladding powder feeder, setting technological parameters of the laser beam, starting laser cladding in protective gas, and obtaining the AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating after the laser cladding process is finished.
3. The method for preparing the AlCrFeMnTi high entropy alloy high temperature wear resistant coating according to claim 2, which is characterized in that: the ball milling rotating speed of the step S1 is 200-300r/min, and the ball milling time is 2-3 h.
4. The method for preparing the AlCrFeMnTi high entropy alloy high temperature wear resistant coating according to claim 2, which is characterized in that: the step S2 specifically comprises the following steps:
s21, sequentially polishing and polishing the surface of the nickel alloy matrix by using 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper, 1500# metallographic sand paper, 2000# metallographic sand paper and 2500# metallographic sand paper to remove oxide impurities on the surface of the nickel alloy matrix;
s22, carrying out ultrasonic cleaning on the surface of the nickel alloy matrix for 15-45min through absolute ethyl alcohol, and then drying.
5. The method for preparing the AlCrFeMnTi high entropy alloy high temperature wear resistant coating according to claim 2, which is characterized in that: the shielding gas in the steps S2 and S3 is argon.
6. The method for preparing the AlCrFeMnTi high entropy alloy high temperature wear resistant coating according to claim 2, which is characterized in that: in step S3, during laser cladding, the process parameters of the laser beam are as follows: the laser power is 1000W, the laser spot diameter is 5mm, the laser scanning speed is 110-140mm/min, the laser lap joint rate is 50-75%, and the powder feeding speed of the laser cladding powder feeder is 8-11g/min.
CN202211704104.1A 2022-12-29 2022-12-29 AlCrFeMnTi high-entropy alloy high-temperature wear-resistant coating and preparation method thereof Pending CN116240536A (en)

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