CN110684978A - High-entropy alloy coating and preparation method thereof - Google Patents
High-entropy alloy coating and preparation method thereof Download PDFInfo
- Publication number
- CN110684978A CN110684978A CN201911023416.4A CN201911023416A CN110684978A CN 110684978 A CN110684978 A CN 110684978A CN 201911023416 A CN201911023416 A CN 201911023416A CN 110684978 A CN110684978 A CN 110684978A
- Authority
- CN
- China
- Prior art keywords
- entropy alloy
- alloy coating
- coating
- powder
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- 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
Abstract
The invention discloses a high-entropy alloy coating and a preparation method thereof, and belongs to the technical field of alloy coatings. The high-entropy alloy coating is composed of Co, Cr, Fe, Ni and Mo elements, which can be expressed as CoCr2FeNiMoxWherein the value range of x is as follows: 0 to 0.4, which comprises the following components: co: 18.5-20 at.%; cr: 37-40 at.%; fe: 18.5-20 at.%; ni: 18.5-20 at.%; mo: 0-7.5 at.%. Accurately weighing each metal powder according to the molar mass ratio, and putting the metal powders into a ball mill for mixing. Compacting the mixed powder, tightly bonding the powder with a matrix through a bonding agent, drying, and carrying out laser cladding to obtain a cladding layer. The high-entropy alloy coating is prepared on the surface of the material in a laser cladding mode, so that the wear resistance and corrosion resistance of the material are effectively improved.
Description
Technical Field
The invention belongs to the technical field of alloy coatings, and relates to CoCr2FeNiMoxA high-entropy alloy coating and a method for preparing the high-entropy alloy coating based on laser cladding.
Background
In 2004, leaf samourhood et al proposed the concept of High Entropy Alloy (HEA). It is composed of at least 5 elements, and the atomic percentage of each element is in the range of 5-35%. Due to the higher mixed entropy and atomic retardation diffusion effects, high entropy alloys tend to form simple solid solution phases such as Face Centered Cubic (FCC), Body Centered Cubic (BCC), or Hexagonal Close Packed (HCP) rather than various complex intermetallic compounds. By means of unique crystal structure and characteristic effect, the high-entropy alloy has the characteristics of high strength, corrosion resistance, wear resistance, high-temperature oxidation resistance and the like, and has great application potential.
At present, the preparation method of the high-entropy alloy coating mainly comprises magnetron sputtering, laser cladding and the like. Magnetron sputtering is the process of bombarding the surface of a target by high-energy particles to make target atoms escape and move along a certain direction, and finally forming a coating on a substrate. The preparation method has high requirements on the target material, expensive instruments, limited coating thickness and poor bonding force with a substrate. The laser cladding has the advantages of high energy density and rapid cooling of the cladding layer, the coating and the base material show excellent metallurgical bonding, the bonding strength is high, and the composition segregation of the coating can be effectively avoided and the tissue refinement is promoted. Therefore, the preparation of the high-entropy alloy coating by laser cladding has feasibility in theory and process, and is a surface modification process which is rapidly developed at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel high-entropy alloy coating and a laser cladding preparation method.
In order to realize the purpose, the invention is realized by adopting the following scheme:
the high-entropy alloy coating is characterized by consisting of Co, Cr, Fe, Ni and Mo elements, and the expression is CoCr2FeNiMoxWherein the value range of x is as follows: 0 to 0.4, which comprises the following components: co: 18.5-20 at.%; cr: 37-40 at.%; fe: 18.5-20 at.%; ni: 18.5-20 at.%; mo: 0-7.5 at.%.
The preparation method of the high-entropy alloy coating is characterized by comprising the following steps of:
a. after each accurately weighed high-entropy alloy powder is dry-mixed in a vacuum ball mill for 2.5-3.5 hours, taking a proper amount of powder and putting the powder into a tabletting mold, and extruding the mold by a tabletting machine at a certain pressure to prepare a high-entropy alloy sheet;
b. preparing a binder, which comprises the following components: 80% by mass of acetone plus 20% by mass of cellulose acetate; adhering the high-entropy alloy sheet to the surface of a matrix through a binder to obtain a prefabricated layer, and drying the prefabricated layer to prepare laser cladding;
c. when laser cladding is carried out, stainless steel is selected as a substrate, a surface cladding layer is prepared by an LSW-500 laser, and the specific cladding process comprises the following steps: the laser power is 650-750W, the spot diameter is 1.0mm, the scanning speed is 350-450 mm/min, the defocusing amount is 5mm, high-purity argon is used as protective gas, and the gas flow is 15-20L/min.
Further, the substrate is 2605N stainless steel.
Furthermore, the adhesive is formed by uniformly mixing 80 mass percent of acetone and 20 mass percent of cellulose acetate, the purity of the two medicines is more than 99.5 percent, and the prepared adhesive is colloid so as to be conveniently and uniformly coated on the surface of the base material.
Furthermore, the laser power is 670-720W preferably during laser cladding, the diameter of a light spot is 1.0mm, the scanning speed is 430-450 mm/min, the defocusing amount is 5mm, high-purity argon is used as protective gas, and the gas flow is 20L/min.
The invention has the beneficial effects that:
(1) in the high-entropy alloy powder, besides the cheap element Fe, all elements improve the performance of the alloy coating. Wherein, Co, Cr and Ni elements can effectively improve the corrosion resistance of the coating, and the Cr element can improve the hardness of the coating through solid solution strengthening. The addition of Mo element can not only increase the corrosion resistance of the coating against acid solution, but also promote the precipitation of secondary phase to improve the wear resistance of the coating.
(2) The high-entropy alloy coating prepared by the method disclosed by the invention is firmly combined with a matrix, is free from defects, is not easy to crack and has excellent compactness. The prepared coating has excellent performance, the corrosion resistance in strong acid is superior to that of 2605N stainless steel, the hardness can reach 724HV, and the friction coefficient and the grinding trace depth are far lower than those of the substrate during wear, which shows that the wear resistance is obviously improved.
(3) The preparation method of the invention takes Co, Cr, Fe, Ni and Mo as raw materials, has wide sources and simple and reliable preparation process.
Drawings
FIG. 1 is an XRD pattern of coatings prepared in examples 1-4 of the present invention;
FIG. 2 is a graph of the coefficient of friction of coatings prepared in examples 1-4 of the present invention in an abrasive environment;
FIG. 3 is a graph of the coefficient of friction of coatings prepared in examples 1-4 of the present invention in an abrasive environment;
FIG. 4 shows CoCr prepared in example 1 of the present invention2A micro-topography of the FeNi coating;
FIG. 5 shows CoCr prepared in example 2 of the present invention2FeNiMo0.2A microscopic topography of the coating;
FIG. 6 shows CoCr prepared in example 3 of the present invention2FeNiMo0.3A microscopic topography of the coating;
FIG. 7 shows CoCr prepared in example 4 of the present invention2FeNiMo0.4A microscopic topography of the coating.
Detailed Description
The technical scheme of the invention is further illustrated by combining the specific examples. Detailed metal powder drug information is shown in table 1 below:
the substrate is made of stainless steel 2605N, surface oxides are removed through coarse grinding with No. 400 sand paper, and oil stains on the surface are removed through alcohol ultrasonic. The chemical components (mass fraction,%) are shown in the following table 2:
the method is implemented according to the following steps:
example 1
1. High-entropy alloy powder CoCr according to molar mass ratio2FeNiMox(x is 0), wherein the mass of each component is accurately weighed by an electronic balance, and the ratio of Co is 20 mol%, Cr is 40 mol%, Fe is 20 mol%, and Ni is 20 mol%.
2. Putting the metal powder of each component into a vacuum ball mill for 3 hours and uniformly mixing.
3. And (3) putting the uniformly mixed alloy powder into a tabletting mould, and compacting by adopting a tabletting machine at a certain pressure to prepare the high-entropy alloy sheet.
4. Acetone and 20 percent cellulose acetate with the mass percentage of 80 percent are accurately weighed and evenly mixed to obtain the colloidal adhesive. And (3) tightly bonding the high-entropy alloy sheet with the surface of the matrix through a bonding agent, and drying and then carrying out laser cladding.
5. The LSW-500 type laser comprises the following specific processes: the laser power is 700W, the spot diameter is 1mm, the scanning speed is 440mm/min, the 40% overlap ratio and the defocusing amount are 5mm, high-purity argon is used as protective gas, and the gas flow is 20L/min.
6. The sample with the coating was prepared by wire cutting, and the phase of the prepared coating was characterized by Smartlab model 9kw X-ray diffractometer, resulting in a coating with a single FCC solid solution phase, as shown in fig. 1. And then, microscopic morphology analysis is carried out on the coating by using a Scanning Electron Microscope (SEM) of Quanta250 of FEI company, the surface morphology is shown in figure 4, and the surface of the coating is shown to be composed of dark gray dendrites and reticular light-colored interdendritic tissues. The sample is tested by adopting a Versa STAT3F electrochemical workstation, a Pt electrode as a counter electrode and a saturated calomel electrode as a reference electrode to obtain a simulated phosphoric acid reactor solution (40 wt% H)3PO4+4wt％H2SO4+1wt％Cl-) The self-corrosion potential and the dull potential obtained by the potentiodynamic polarization curve are increased to a certain degree relative to the raw material, and the self-corrosion current density is reduced, and the results show that the corrosion resistance of the surface of the material is improved by the high-entropy alloy cladding layer. The microhardness of the section of the high-entropy alloy coating is measured by an MH-6 type microhardness meter, the load is 200g, and the loading time is 10sAnd testing to obtain that the average hardness of the high-entropy alloy coating is 1.1 times of that of the base material. The wear resistance of the high-entropy alloy coating is researched by an MMS-2A type friction wear testing machine, and the experimental parameters are as follows: SiN friction pair, load 15N and abrasion time 60 min. The experimental environments were a dry environment and a simulated phosphoric acid reactor solution (i.e., wear and abrasion tests), respectively, and the results of fig. 2 and 3 show that the friction coefficient of the high-entropy alloy cladding layer is much lower than that of the raw material in either the dry or solution environment. Finally, the depths of grinding marks generated under the abrasion and abrasion conditions are measured by using a KEYENCE VX-200 laser confocal microscope, and after comparison, the depths of the grinding marks on the surface of the high-entropy alloy coating after the abrasion and abrasion tests are only 69 percent and 52 percent of the depths of the grinding marks on the surface of the base material respectively.
Example 2
1. High-entropy alloy powder CoCr according to molar mass ratio2FeNiMox(x is 0.2) in which 19.2 mol% of Co, 38.4 mol% of Cr, 19.2 mol% of Fe, 19.2 mol% of Ni and 4% of Mo were contained, and the mass of each component was accurately weighed using an electronic balance.
2. Putting the metal powder of each component into a vacuum ball mill for 3 hours and uniformly mixing.
3. And putting the uniformly mixed powder into a tabletting mould, and compacting by adopting a tabletting machine at a certain pressure to prepare the high-entropy alloy sheet.
4. Accurately weighing 80% of acetone and 20% of cellulose acetate in percentage by mass, uniformly mixing to obtain a colloidal binder, tightly bonding the high-entropy alloy sheet with the surface of a material through the colloidal binder, and performing laser cladding after air drying.
5. The LSW-500 type laser comprises the following specific processes: the laser power is 680W, the spot diameter is 1mm, the scanning speed is 450mm/min, the 40% overlap ratio and the defocusing amount are 5mm, high-purity argon is used as protective gas, and the gas flow is 20L/min.
6. A sample of the cladding layer was prepared by wire-cutting and the resulting coating was phase-characterized using a Smartlab model 9kw X-ray diffractometer, giving a coating consisting of an FCC solid solution phase and a sigma-CrMo precipitate phase, as shown in fig. 1. Then coating is carried out by using a Scanning Electron Microscope (SEM) of Quanta250 of FEI companyThe microscopic morphology analysis and the surface morphology are shown in FIG. 5, which shows that the coating surface is composed of dark gray dendrites and reticular light-colored interdendritic structures. The sample is tested by adopting a Versa STAT3F electrochemical workstation, taking a Pt electrode as a counter electrode and a saturated calomel electrode as a reference electrode to obtain a simulated phosphoric acid reactor solution (40 wt% H)3PO4+4wt％H2SO4+1wt％Cl-) In the potentiodynamic polarization curve, the self-corrosion potential and the dull-broken potential obtained by the curve are greatly improved relative to the raw materials, the self-corrosion current density is obviously reduced, and the corrosion resistance of the surface of the material can be effectively improved by adding a small amount of Mo in the coating. The microhardness of the section of the high-entropy alloy coating is measured by an MH-6 type microhardness meter, the load is 200g, the loading time is 10s, and the average hardness of the high-entropy alloy coating is 1.6 times of that of the base material. The wear resistance of the high-entropy alloy coating is researched by an MMS-2A type friction wear testing machine, and the experimental parameters are as follows: SiN friction pair, load 15N and abrasion time 60 min. The experimental environments were a dry environment and a simulated phosphoric acid reactor solution (i.e., wear and abrasion tests), respectively, and the results of fig. 2 and 3 show that the friction coefficient of the high-entropy alloy cladding layer is much lower than that of the raw material in either the dry or solution environment. Finally, the depths of grinding marks generated under the abrasion and abrasion conditions are measured by using a KEYENCE VX-200 laser confocal microscope, and after comparison, the depths of the grinding marks on the surface of the high-entropy alloy coating after the abrasion and abrasion tests are respectively 46% and 38% of the depths of the grinding marks on the surface of the base material.
Embodiment 3
1. High-entropy alloy powder CoCr according to molar mass ratio2FeNiMox(x is 0.3) in which 18.9 mol% of Co, 37.7 mol% of Cr, 18.9 mol% of Fe, 18.9 mol% of Ni, and 5.6% of Mo were contained, and the mass of each component was accurately weighed using an electronic balance.
2. Putting the metal powder of each component into a vacuum ball mill for 3 hours and uniformly mixing.
3. And putting the uniformly mixed powder into a tabletting mould, and compacting by adopting a tabletting machine at a certain pressure to prepare the high-entropy alloy sheet.
4. Accurately weighing 80% of acetone and 20% of cellulose acetate in percentage by mass, uniformly mixing to obtain a colloidal binder, tightly bonding the high-entropy alloy sheet with the surface of a material through the colloidal binder, and performing laser cladding after air drying.
5. The LSW-500 type laser comprises the following specific processes: the laser power is 680W, the spot diameter is 1mm, the scanning speed is 450mm/min, the defocusing amount is 5mm, high-purity argon is used as protective gas, and the gas flow is 20L/min.
6. A sample of the cladding layer was prepared by wire-cutting and the resulting coating was phase-characterized using a Smartlab model 9kw X-ray diffractometer, giving a coating consisting of an FCC solid solution phase and a sigma-CrMo precipitate phase, as shown in fig. 1. And then, microscopic morphology analysis is carried out on the coating by using a Scanning Electron Microscope (SEM) of Quanta250 of FEI company, the surface morphology is shown in figure 6, and the surface of the coating is shown to be composed of dark gray dendrites and reticular light-colored interdendritic tissues. The sample is tested by adopting a Versa STAT3F electrochemical workstation, taking a Pt electrode as a counter electrode and a saturated calomel electrode as a reference electrode to obtain a simulated phosphoric acid reactor solution (40 wt% H)3PO4+4wt％H2SO4+1wt％Cl-) The self-corrosion potential and the passivation potential obtained by the curve are increased relative to the raw material, the self-corrosion current density is reduced, and the corrosion resistance of the surface of the material is improved. The microhardness of the section of the high-entropy alloy coating is measured by an MH-6 type microhardness meter, the load is 200g, the loading time is 10s, and the average hardness of the high-entropy alloy coating is 1.9 times of that of the base material. The wear resistance of the high-entropy alloy coating is researched by an MMS-2A type friction wear testing machine, and the experimental parameters are as follows: SiN friction pair, load 15N and abrasion time 60 min. The experimental environments were a dry environment and a simulated phosphoric acid reactor solution (i.e., wear and abrasion tests), respectively, and the results of fig. 2 and 3 show that the friction coefficient of the high-entropy alloy cladding layer is much lower than that of the raw material in either the dry or solution environment. Finally, measuring the depth of the grinding mark generated under the wear and abrasion conditions by using a KEYENCE VX-200 laser confocal microscope, and comparing the depths of the grinding mark on the surface of the high-entropy alloy coating after the wear and abrasion tests to respectively obtain the depth of the grinding mark only 24% of the depth of the grinding mark on the surface of the base material and the depth of the grinding mark on the surface of the high-entropy alloy coating after the wear and abrasion tests24％。
Example 4
1. High-entropy alloy powder CoCr according to molar mass ratio2FeNiMox(x is 0.4) in which 18.5 mol% of Co, 37 mol% of Cr, 18.5 mol% of Fe, 18.5 mol% of Ni and 7.5 mol% of Mo were contained, and the mass of each component was accurately weighed using an electronic balance.
2. Putting the metal powder of each component into a vacuum ball mill for 3 hours and uniformly mixing.
3. And putting the uniformly mixed powder into a tabletting mould, and compacting by adopting a tabletting machine at a certain pressure to prepare the high-entropy alloy sheet.
4. Accurately weighing 80% of acetone and 20% of cellulose acetate in percentage by mass, uniformly mixing to obtain a colloidal binder, tightly bonding the high-entropy alloy sheet with the surface of a material through the colloidal binder, and performing laser cladding after air drying.
5. The LSW-500 type laser comprises the following specific processes: the laser power is 720W, the spot diameter is 1mm, the scanning speed is 430mm/min, the defocusing amount is 0mm, high-purity argon is used as protective gas, and the gas flow is 20L/min.
6. A sample of the cladding layer was prepared by wire-cutting and the resulting coating was phase-characterized using a Smartlab model 9kw X-ray diffractometer, giving a coating consisting of an FCC solid solution phase and a sigma-CrMo precipitate phase, as shown in fig. 1. And sigma phase is increased along with the addition of Mo element in the coating. And then, microscopic morphology analysis is carried out on the coating by using a Scanning Electron Microscope (SEM) of Quanta250 of FEI company, the surface morphology is shown in figure 7, and the surface of the coating is shown to be composed of dark gray dendrites and reticular light-colored interdendritic tissues. The sample is tested by adopting a Versa STAT3F electrochemical workstation, taking a Pt electrode as a counter electrode and a saturated calomel electrode as a reference electrode to obtain a simulated phosphoric acid reactor solution (40 wt% H)3PO4+4wt％H2SO4+1wt％Cl-) The self-corrosion potential and the dull-broken potential obtained by the potentiodynamic polarization curve are increased to a certain extent relative to the raw materials, the self-corrosion current density is reduced, and the corrosion resistance of the surface of the material is improved. Micro-hardness of high-entropy alloy coating section by MH-6 type micro-hardness meterThe load is 200g, the loading time is 10s, and the average hardness of the high-entropy alloy coating is 2.9 times of that of the base metal. The wear resistance of the high-entropy alloy coating is researched by an MMS-2A type friction wear testing machine, and the experimental parameters are as follows: SiN friction pair, load 15N and abrasion time 60 min. The experimental environments were a dry environment and a simulated phosphoric acid reactor solution (i.e., wear and abrasion tests), respectively, and the results of fig. 2 and 3 show that the friction coefficient of the high-entropy alloy cladding layer is much lower than that of the raw material in either the dry or solution environment. Finally, the depths of grinding marks generated under the abrasion and abrasion conditions are measured by using a KEYENCE VX-200 laser confocal microscope, and after comparison, the depths of the grinding marks on the surface of the high-entropy alloy coating after the abrasion and abrasion tests are respectively only 16% and 33% of the depths of the grinding marks on the surface of the base material.
Table 3 shows the corrosion resistance data obtained in examples 1 to 4, including corrosion potential, corrosion current, and corrosion-dull potential. It can be seen from the table that CoCr is alloyed with high entropy2FeNiMoxThe increase of the value of x improves the corrosion resistance of the material surface to a certain extent compared with the base material, and particularly, the best corrosion resistance effect is obtained under the condition that x is 0.2. When x exceeds 0.2, the corrosion resistance of each coating starts to decrease with the increase of the Mo element. This may be due to excessive sigma phase generation, resulting in more micro-domain galvanic corrosion in the coating, accelerating corrosion.
Table 4 shows the microhardness values of the surface cladding layers of examples 1 to 4, and it can be seen from the data that the microhardness values of the material surface continuously increase with increasing Mo content. The highest hardness value is three times the surface of the substrate, which may be due to the presence of sigma precipitates, causing the coating to harden.
Table 5 shows the depth of the wear scar (abrasion and abrasion) of the examples 1 to 4 under two different environments, and it is clear from the figure that the wear scar of 2605N stainless steel is deepest during the abrasion process, while the wear scar of the surface cladding layer becomes shallower as the Mo content increases. The same stainless steel is more abrasive than the surface coating under abrasive conditions, wherein CoCr2FeNiMo0.3The depth of grinding marks of the coating is minimum, and the grinding is continuously increased by the content of Mo elementThe depth of the scar will appear to rise slightly.
FIGS. 2 and 3 are graphs showing the change of friction coefficient with time of examples 1 to 4, which were subjected to wear and abrasion tests, and FIG. 2 shows 2605N stainless steel and CoCr2FeNiMoxAnd (x is 0,0.2,0.3 and 0.4) the friction coefficient curve of the HEA coating in a wear environment respectively, and the friction coefficient of the coating is generally reduced along with the increase of the Mo content, which indicates that the wear resistance is obviously improved due to the existence of the coating. Fig. 3 is a plot of the coefficient of friction in an abrasive environment, from which it can be seen that the curve has a minimum point at a Mo mole fraction of 0.3 and an increase in the coefficient of friction as the Mo content continues to increase, possibly due to the coating being affected by corrosion of the solution.
TABLE 3
TABLE 4
TABLE 5
Claims (5)
1. The high-entropy alloy coating is characterized by consisting of Co, Cr, Fe, Ni and Mo elements, and the expression is CoCr2FeNiMoxWherein the value range of x is as follows: 0 to 0.4, which comprises the following components: co: 18.5-20 at.%; cr: 37-40 at.%; fe: 18.5-20 at.%; ni: 18.5-20 at.%; mo: 0-7.5 at.%.
2. The preparation method of the high-entropy alloy coating as claimed in claim 1, which is carried out according to the following steps:
a. after each accurately weighed high-entropy alloy powder is dry-mixed in a vacuum ball mill for 2.5-3.5 hours, taking a proper amount of powder and putting the powder into a tabletting mold, and extruding the mold by a tabletting machine at a certain pressure to prepare a high-entropy alloy sheet;
b. preparing a binder, which comprises the following components: 80% by mass of acetone plus 20% by mass of cellulose acetate; adhering the high-entropy alloy sheet to the surface of a matrix through a binder to obtain a prefabricated layer, and drying the prefabricated layer to prepare laser cladding;
c. when laser cladding is carried out, stainless steel is selected as a substrate, a surface cladding layer is prepared by an LSW-500 laser, and the specific cladding process comprises the following steps: the laser power is 650-750W, the spot diameter is 1.0mm, the scanning speed is 350-450 mm/min, the defocusing amount is 5mm, high-purity argon is used as protective gas, and the gas flow is 15-20L/min.
3. A method for preparing a high entropy alloy coating layer according to claim 2, wherein the mixture of acetone and cellulose acetate is colloidal so as to be uniformly coated on the surface of the base material.
4. A method of producing a high entropy alloy coating layer as claimed in claim 2, wherein the substrate is 2605N stainless steel.
5. A preparation method of a high-entropy alloy coating according to claim 2, wherein the laser power is 670-720W, the spot diameter is 1.0mm, the scanning speed is 430-450 mm/min, the defocusing amount is 5mm, high-purity argon is used as a protective gas, and the gas flow is 20L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023416.4A CN110684978A (en) | 2019-10-25 | 2019-10-25 | High-entropy alloy coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023416.4A CN110684978A (en) | 2019-10-25 | 2019-10-25 | High-entropy alloy coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110684978A true CN110684978A (en) | 2020-01-14 |
Family
ID=69114468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911023416.4A Pending CN110684978A (en) | 2019-10-25 | 2019-10-25 | High-entropy alloy coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110684978A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684211A (en) * | 2020-12-02 | 2021-04-20 | 成都先进金属材料产业技术研究院有限公司 | Method for in-situ observation of super duplex stainless steel phase change |
| CN114369799A (en) * | 2021-12-17 | 2022-04-19 | 中国船舶重工集团公司第七一一研究所 | Composite coating for surface of engine connecting rod, preparation method of composite coating and engine connecting rod |
| CN114438390A (en) * | 2022-01-13 | 2022-05-06 | 贵州大学 | High-plasticity corrosion-resistant high-entropy alloy and preparation method thereof |
| 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 |
| CN114807720A (en) * | 2022-04-18 | 2022-07-29 | 贵州大学 | High-entropy alloy coating resistant to strong acid erosion and used for repairing stirring blade of phosphoric acid reaction tank and preparation method of high-entropy alloy coating |
| CN115029601A (en) * | 2022-07-20 | 2022-09-09 | 上海海事大学 | High-entropy alloy/hard ceramic synergistic strengthening composite coating and preparation method thereof |
| CN115704071A (en) * | 2021-08-04 | 2023-02-17 | 宝山钢铁股份有限公司 | High-entropy alloy powder, preparation method thereof and preparation method of high-entropy alloy coating |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105624515A (en) * | 2014-10-30 | 2016-06-01 | 安旭龙 | High-entropy alloy coating material and preparation method thereof |
| CN107739958A (en) * | 2017-10-24 | 2018-02-27 | 辽宁工业大学 | A kind of high-entropy alloy containing eutectic structure and preparation method thereof |
| CN108531776A (en) * | 2018-05-28 | 2018-09-14 | 中南大学 | A kind of high-strength titanium matrix composite of brake system of car powder metallurgy and preparation method thereof |
| CN109234603A (en) * | 2018-08-31 | 2019-01-18 | 王祥慧 | A kind of high-entropy alloy powder and diamond tool tyre case |
| CN109487263A (en) * | 2018-11-09 | 2019-03-19 | 中国石油大学(华东) | A kind of multiple elements design sulfide solid lubricant film and its preparation method and application |
-
2019
- 2019-10-25 CN CN201911023416.4A patent/CN110684978A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105624515A (en) * | 2014-10-30 | 2016-06-01 | 安旭龙 | High-entropy alloy coating material and preparation method thereof |
| CN107739958A (en) * | 2017-10-24 | 2018-02-27 | 辽宁工业大学 | A kind of high-entropy alloy containing eutectic structure and preparation method thereof |
| CN108531776A (en) * | 2018-05-28 | 2018-09-14 | 中南大学 | A kind of high-strength titanium matrix composite of brake system of car powder metallurgy and preparation method thereof |
| CN109234603A (en) * | 2018-08-31 | 2019-01-18 | 王祥慧 | A kind of high-entropy alloy powder and diamond tool tyre case |
| CN109487263A (en) * | 2018-11-09 | 2019-03-19 | 中国石油大学(华东) | A kind of multiple elements design sulfide solid lubricant film and its preparation method and application |
Non-Patent Citations (2)
| Title |
|---|
| WU, QINGFENG: "Revealing the Selection of sigma and mu Phases in CoCrFeNiMo (x) High Entropy Alloys by CALPHAD", 《JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION》 * |
| 田彦文: "退火温度对包套挤压 FeCoCrNiMo0.1高熵合金组织与摩擦性能的影响", 《粉末冶金材料科学与工程》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684211A (en) * | 2020-12-02 | 2021-04-20 | 成都先进金属材料产业技术研究院有限公司 | Method for in-situ observation of super duplex stainless steel phase change |
| CN115704071A (en) * | 2021-08-04 | 2023-02-17 | 宝山钢铁股份有限公司 | High-entropy alloy powder, preparation method thereof and preparation method of high-entropy alloy coating |
| CN114369799A (en) * | 2021-12-17 | 2022-04-19 | 中国船舶重工集团公司第七一一研究所 | Composite coating for surface of engine connecting rod, preparation method of composite coating and engine connecting rod |
| CN114438390A (en) * | 2022-01-13 | 2022-05-06 | 贵州大学 | High-plasticity corrosion-resistant high-entropy alloy and preparation method thereof |
| CN114438390B (en) * | 2022-01-13 | 2022-10-18 | 贵州大学 | High-plasticity corrosion-resistant high-entropy alloy and preparation method thereof |
| 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 |
| CN114807720A (en) * | 2022-04-18 | 2022-07-29 | 贵州大学 | High-entropy alloy coating resistant to strong acid erosion and used for repairing stirring blade of phosphoric acid reaction tank and preparation method of high-entropy alloy coating |
| CN114737184B (en) * | 2022-04-18 | 2023-09-22 | 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 |
| CN114807720B (en) * | 2022-04-18 | 2024-01-30 | 贵州大学 | High-entropy alloy coating for repairing phosphoric acid reaction tank stirring paddle blade resistant to strong acid erosion and preparation method thereof |
| CN115029601A (en) * | 2022-07-20 | 2022-09-09 | 上海海事大学 | High-entropy alloy/hard ceramic synergistic strengthening composite coating and preparation method thereof |
| CN115029601B (en) * | 2022-07-20 | 2023-12-19 | 上海海事大学 | High-entropy alloy/hard ceramic synergistic reinforced composite coating and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110684978A (en) | High-entropy alloy coating and preparation method thereof | |
| Shu et al. | Effects of laser power on microstructure and properties of laser cladded CoCrBFeNiSi high-entropy alloy amorphous coatings | |
| Feng et al. | Unexpected cathodic role of Mg41Sm5 phase in mitigating localized corrosion of extruded Mg-Sm-Zn-Zr alloy in NaCl solution | |
| Sun et al. | Effect of Y2O3 contents on oxidation resistance at 1150 C and mechanical properties at room temperature of ODS Ni-20Cr-5Al alloy | |
| Zhang et al. | Effects of Ni addition on mechanical properties and corrosion behaviors of coarse-grained WC-10 (Co, Ni) cemented carbides | |
| Li et al. | Corrosion and wear resistance of micro‐arc oxidation composite coatings on magnesium alloy AZ31—the influence of inclusions of carbon spheres | |
| Bai et al. | Corrosion behaviors and contact resistances of the low-carbon steel bipolar plate with a chromized coating containing carbides and nitrides | |
| Zhu et al. | Microstructure and wide temperature range self-lubricating properties of laser cladding NiCrAlY/Ag2O/Ta2O5 composite coating | |
| Ningshen et al. | Corrosion behavior of Zr-based metallic glass coating on type 304L stainless steel by pulsed laser deposition method | |
| CN114807720B (en) | High-entropy alloy coating for repairing phosphoric acid reaction tank stirring paddle blade resistant to strong acid erosion and preparation method thereof | |
| CN106757013A (en) | A kind of titanium alloy laser surface silicide strengthens polynary high-temperature alloy layer and preparation method thereof | |
| Ouyang et al. | Corrosion and corrosive wear behavior of WC–MgO composites with and without grain-growth inhibitors | |
| CN111020564A (en) | Rare earth-containing titanium-based laser cladding wear-resistant coating and preparation method thereof | |
| Li et al. | Surface alloying of gray cast iron with chromium by high current pulsed electron beam treatment | |
| Silva et al. | Electrochemical and microstructural study of Ni-Cr-Mo alloys used in dental prostheses | |
| Al Afghani et al. | Plasma electrolytic oxidation of zircaloy-4 in a mixed alkaline electrolyte | |
| CN106319512A (en) | Double-phase metal-based composite coating resistant to corrosion and high-temperature oxidization and preparation method thereof | |
| CN114737184A (en) | High-hardness nano TiC particle reinforced phosphoric acid reaction tank stirring paddle blade high-entropy alloy composite coating and preparation method thereof | |
| Peng et al. | Investigations of the mechanical and high-temperature tribological properties of the Inconel 718 alloy formed by selective laser melting | |
| Ouyang et al. | TiC-self-healing thermal barrier coating structures and oxidation resistance | |
| Abdi et al. | Evaluation of the corrosion resistance of AlCoCrFeMnNi high entropy alloy hard coating applied by electro spark deposition | |
| Xu et al. | Effects of CeO 2 on the microstructure and properties of laser cladding 316L coating | |
| CN108359977A (en) | A kind of laser melting coating FeCoVWNbSc high-entropy alloy powders and application method | |
| Isfahani et al. | Electrophoretic deposition of Ni/SiO2 nanocomposite coating: fabrication process and tribological and corrosion properties | |
| Sun et al. | Corrosion behavior of Ta-10W coatings on CP-Ti and TC4 substrates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |