CN113293368A - High-hardness high-wear-resistance high-entropy intermetallic compound coating and preparation method thereof - Google Patents
High-hardness high-wear-resistance high-entropy intermetallic compound coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 50
- 229910000765 intermetallic Inorganic materials 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000000498 ball milling Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 238000004372 laser cladding Methods 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000011812 mixed powder Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims abstract description 6
- 238000005253 cladding Methods 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000002103 nanocoating Substances 0.000 description 2
- 229910002549 Fe–Cu Inorganic materials 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 229910001005 Ni3Al Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention provides a high hardness, high wear resistance and high entropy intermetallic compound coating, which is characterized in that the molecular formula is FeCoNiAlCun, and n=0.1-0.4. The preparation method comprises the following steps: 1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, then adding Cu powder and mixing uniformly; 2) ball milling the powder, namely placing the mixed powder into a ball milling tank for ball milling, sieving the ball milled powder, and placing the sieved powder into a vacuum drier for storage for later use; 3) polishing the base material, polishing, cleaning and drying the surface of the base material; 4) preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method. The FeCoNiAlCun coating prepared by the invention has the advantages of high hardness, small surface cracking tendency of the coating, good wear resistance and the like, and can play a good protective effect on traditional iron-based alloys.
Description
Technical Field
The invention relates to a high-hardness high-wear-resistance high-entropy intermetallic compound coating and a preparation method thereof, belonging to the technical field of intermetallic compound coatings.
Background
Ni3Al is a compound having L12The ordered intermetallic compound of the type exhibits a series of excellent properties such as coexistence of the internal metallic bond and the covalent bond, for exampleThe high-temperature structural material has the advantages of light weight, high hardness, high strength, high wear resistance and excellent oxidation resistance, and is widely considered as a high-temperature structural material with great potential.
However, bulk Ni3Due to the existence of Ni-Al covalent bonds in the Al ordered alloy, the brittleness is high, the processing is difficult, and the Al ordered alloy is difficult to be applied to large engineering components. Therefore, a refractory high-entropy alloy coating with high hardness and high wear resistance needs to be developed.
CN106086529 discloses a Co-Ni-Fe-Cu nano-coating, which is prepared by adding Al2O3The powder improves the wear resistance, and only Co, Ni, Fe and Cu mixed nano coating is formed, but not intermetallic compound coating.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-hardness high-wear-resistance high-entropy intermetallic compound coating, and a second aim is to provide a preparation method of the coating. Has the characteristics of high hardness, small cracking tendency of the surface of the coating, good wear resistance and the like.
In order to achieve the first object of the present invention, the present invention provides a high-hardness high-wear-resistance high-entropy intermetallic compound coating layer, characterized in that: molecular formula of FeCoNiAlCun,n＝0.1-0.4。
Fe. Co and Ni elements are in the VIII group of the periodic table, the atomic properties are similar and the interaction is weak, and the invention utilizes Fe, Co and Ni to react with Ni3And replacing Ni in the Al ordered intermetallic compound, and simultaneously adding Cu to obtain the high-entropy alloy. High hardness, small cracking tendency of the surface of the coating and good wear resistance.
The second object of the present invention is achieved by: the preparation method of the refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is characterized by comprising the following steps:
1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, then adding Cu, and mixing uniformly;
2) ball milling the powder, namely placing the mixed powder in a ball milling tank for ball milling, sieving the ball milled powder, and placing the powder in a vacuum drier for storage for later use;
3) polishing the base material, polishing, cleaning and drying the surface of the base material;
4) preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method.
The FeCoNiAlCux high-entropy alloy coating prepared by laser cladding has the advantages of high hardness, small cracking tendency of the coating surface, good wear resistance (can be seen in figures 3 and 4), and easy processing.
In the scheme, the method comprises the following steps: in the step 1), the purity of the Fe, Co, Ni and Al metal powder is more than or equal to 99.6 percent, and the granularity is 200-300 meshes.
In the scheme, the method comprises the following steps: in the step 4), argon is used for protection when the coating is prepared by the cladding method.
In the scheme, the method comprises the following steps: the purity of Ar gas is more than 99 percent, and the gas flow density is more than or equal to 20 L.min-1。
In the scheme, the method comprises the following steps: the laser power P of cladding is 2.5-3.5kW, the scanning speed v is 3-8mm/s, and the spot size is 20 multiplied by 2mm2The lapping rate w is 45-55%.
In the scheme, the method comprises the following steps: the thickness of the coating is 1.2-2 mm.
The method has the beneficial effects that FeCoNiAlCu prepared by the methodnThe coating has the advantages of high hardness, small crack tendency of the surface of the coating, good wear resistance and the like. Can play a good role in protecting the traditional iron-based alloy.
Description of the drawings:
FIG. 1 is a microstructure of the coatings of examples 1-5.
FIG. 2 is a comparison of the average micro Vickers hardness of the coatings of examples 1-5.
FIG. 3 is a graph of the coefficient of friction of the coatings of examples 1-5.
FIG. 4 is a graph of the wear quality of the coatings of examples 1-5 over 15min
FIG. 5 is a graph of the wear scar topography of the coatings of examples 1-5 over 15 min.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
Example 1
A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:
1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, the purity of Fe, Co, Ni and Al metal powder is more than or equal to 99.6 percent, and the particle size of the powder is 45-105 mu m.
2) And (3) performing powder ball milling, namely placing the mixed powder in a stainless steel ball milling tank for ball milling for 2 hours at the ball milling machine rotating speed of 300rmp/s, sieving the ball-milled powder with a 200-mesh sieve, and placing the ball-milled powder in a vacuum drier for storage and standby application.
3) And (3) polishing the base material, namely selecting a 45# steel plate as the base material, polishing the surface scale of the cladding layer with the size of 40mm multiplied by 30mm multiplied by 10mm on a grinding machine and 120-mesh abrasive paper until the bright surface is exposed, cleaning the surface oil stain with alcohol, drying with a blower, and storing in a dry mode.
4) Preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method. When the coating is prepared by the cladding method, argon is used for protection. The purity of Ar gas is more than 99 percent, and the gas flow density is more than or equal to 20 L.min-1. The laser power P of cladding is 3kW, the scanning speed v is 5mm/s, and the spot size is 20 multiplied by 2mm2The lapping rate w is 50%, and the thickness of the coating is 1.5 mm.
Examples 2 to 5
Otherwise, 0.1mol, 0.2mol, 0.3mol and 0.4mol of Cu powder were added in the same manner as in example 1. When the powder is prepared, selecting Fe, Co, Ni and Al metal powder according to the mol ratio of 1: 1: 1: 1, then adding Cu powder, and uniformly mixing, wherein the purity of the Fe, Co, Ni, Cu and Al metal powder is more than or equal to 99.6%, and the particle size of the powder is 45-105 mu m.
Example 6
A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:
1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, adding 0.1mol of Cu powder, and mixing uniformly, wherein the purity of Fe, Co, Ni, Cu and Al metal powder is more than or equal to 99.6%, and the particle size of the powder is 45-105 mu m.
2) And (3) performing powder ball milling, namely placing the mixed powder in a stainless steel ball milling tank for ball milling for 2 hours at the ball milling machine rotating speed of 300rmp/s, sieving the ball-milled powder with a 200-mesh sieve, and placing the ball-milled powder in a vacuum drier for storage and standby application.
3) And (3) polishing the base material, namely selecting a 45# steel plate as the base material, polishing the surface scale of the cladding layer with the size of 40mm multiplied by 30mm multiplied by 10mm on a grinding machine and 120-mesh abrasive paper until the bright surface is exposed, cleaning the surface oil stain with alcohol, drying with a blower, and storing in a dry mode.
4) Preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method. When the coating is prepared by the cladding method, argon is used for protection. The purity of Ar gas is more than 99 percent, and the gas flow density is more than or equal to 20 L.min-1. The laser power P of cladding is 2.5kW, the scanning speed v is 3mm/s, and the spot size is 20 multiplied by 2mm2The lap ratio w 45%. the thickness of the coating was 1.2 mm. The average micro Vickers hardness is 562.3HV, and the abrasion mass of the coating is 6.5mg after 15 min.
Example 7
A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:
1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, adding 0.1mol of Cu powder, and mixing uniformly, wherein the purity of Fe, Co, Ni, Cu and Al metal powder is more than or equal to 99.6%, and the particle size of the powder is 45-105 mu m.
2) And (3) performing powder ball milling, namely placing the mixed powder in a stainless steel ball milling tank for ball milling for 2 hours at the ball milling machine rotating speed of 300rmp/s, sieving the ball-milled powder with a 200-mesh sieve, and placing the ball-milled powder in a vacuum drier for storage and standby application.
3) And (3) polishing the base material, namely selecting a 45# steel plate as the base material, polishing the surface scale of the cladding layer with the size of 40mm multiplied by 30mm multiplied by 10mm on a grinding machine and 120-mesh abrasive paper until the bright surface is exposed, cleaning the surface oil stain with alcohol, drying with a blower, and storing in a dry mode.
4) Preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method. When the coating is prepared by the cladding method, argon is used for protection. The purity of Ar gas is more than 99 percent, and the gas flow density is more than or equal to 20 L.min-1. The laser power P of cladding is 3.5kW, the scanning speed v is 8mm/s, and the spot size is 20 multiplied by 2mm2The overlap ratio w 55%. the thickness of the coating was 2 mm. The average micro Vickers hardness is 564.5HV, and the abrasion mass of the coating is 7.02mg after 15 min.
The above description is for the purpose of describing the invention in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments of the invention are limited to those described herein, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A high-hardness high-wear-resistance high-entropy intermetallic compound coating is characterized in that: molecular formula of FeCoNiAlCun，n＝0.1-0.4。
2. The preparation method of the refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is characterized by comprising the following steps:
1) preparing powder, namely selecting Fe, Co, Ni and Al metal powder according to a molar ratio of 1: 1: 1: 1, then adding Cu powder, and mixing uniformly;
2) ball milling the powder, namely placing the mixed powder into a ball milling tank for ball milling, sieving the ball milled powder, and placing the sieved powder into a vacuum drier for storage for later use;
3) polishing the base material, polishing, cleaning and drying the surface of the base material;
4) preparing a laser cladding coating: and preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method.
3. The method for preparing a refractory high-entropy intermetallic compound coating with high hardness and high wear resistance according to claim 2, characterized in that: in the step 1), the purity of Fe, Co, Ni, Al and Cu metal powder is more than or equal to 99.6%, and the particle size of the powder is 45-105 μm.
4. The method for preparing a refractory high-entropy intermetallic compound coating with high hardness and high wear resistance according to claim 3, characterized in that: in the step 4), argon is used for protection when the coating is prepared by the cladding method.
5. The method for preparing a refractory high-entropy intermetallic compound coating with high hardness and high wear resistance according to claim 4, wherein the method comprises the following steps: the purity of Ar gas is more than 99 percent, and the gas flow density is more than or equal to 20 L.min-1。
6. The method for preparing the high-hardness high-wear-resistance refractory high-entropy intermetallic compound coating layer according to claim 5, characterized in that: the laser power P of cladding is 2.5-3.5kW, the scanning speed v is 3-8mm/s, and the spot size is 20 multiplied by 2mm2The lapping rate w is 45-55%.
7. The method for preparing a refractory high-entropy intermetallic compound coating with high hardness and high wear resistance according to claim 6, wherein the method comprises the following steps: the thickness of the coating is 1.2-2 mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114737184A (en) * | 2022-04-18 | 2022-07-12 | 贵州大学 | High-hardness nano TiC particle reinforced phosphoric acid reaction tank stirring paddle blade high-entropy alloy composite coating and preparation method thereof |
| CN115584425A (en) * | 2022-11-10 | 2023-01-10 | 贵州大学 | High-hardness and high-wear-resistance high-entropy alloy coating and preparation method thereof |
| CN115595492A (en) * | 2022-10-12 | 2023-01-13 | 重庆大学（Cn） | Novel as-cast high-ductility high-entropy alloy and preparation method and application thereof |
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Application publication date: 20210824 |