CN114875291B - High-entropy alloy powder and preparation method thereof, and high-entropy alloy laser cladding layer and preparation method thereof - Google Patents
High-entropy alloy powder and preparation method thereof, and high-entropy alloy laser cladding layer and preparation method thereof Download PDFInfo
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Abstract
The invention provides high-entropy alloy powder and a preparation method thereof, and a high-entropy alloy laser cladding layer and a preparation method thereof, and belongs to the technical field of high-entropy alloys. The invention provides high-entropy alloy powder, which comprises the following chemical components in atomic percentage: 10 to 40 percent of Fe, 13 to 20 percent of Al, 10 to 20 percent of Cr, 14 to 25 percent of Ti and 10 to 25 percent of Zr. The high-entropy alloy is prepared by regulating and controlling the proportion of five components of Fe, al, cr, ti and Zr, and the high-entropy alloy has excellent corrosion resistance by controlling the content of the five components. Experimental results show that the ultrahigh-speed laser cladding coating prepared by the high-entropy alloy powder provided by the invention has better corrosion performance than 316 stainless steel in a NaCl solution with the content of 3.5 percent.
Description
Technical Field
The invention relates to the technical field of high-entropy alloy, in particular to high-entropy alloy powder and a preparation method thereof, and a high-entropy alloy laser cladding layer and a preparation method thereof.
Background
The high-entropy alloy is used as a novel high-performance metal material and attracts wide attention of researchers in recent years, the alloy design concept subverts the cognition that the chemical components and the topological structure of the traditional metal are highly ordered as the leading factor, the high-entropy alloy has thermodynamics high entropy, lattice distortion, kinetic diffusion delay and a 'cocktail' effect, a simple cubic solid solution structure is easy to form, and the high-entropy alloy has important application prospects in the fields of aerospace, nuclear power generation, surface engineering and military. The high-entropy alloy has excellent mechanical, chemical and thermophysical properties, especiallyThe refractory high-entropy alloy shows high-temperature mechanical properties superior to those of the traditional Ni-based high-temperature alloy, for example, the yield strength of the VNbMoTaW high-entropy alloy reaches 477MPa at 1600 ℃. The refractory high-entropy alloy also has excellent corrosion resistance, wear resistance and high-temperature oxidation resistance. Senkov et al for NbCrMo 0.5 Ta 0.5 The oxidation resistance of the TiZr alloy at the temperature of 1273K is researched, and the result shows that compared with the common commercial Nb alloy, the NbCrMo 0.5 Ta 0.5 The TiZr high-entropy alloy has more excellent high-temperature oxidation resistance. Lee C.P et Al compare Al 0.5 The corrosion rates of the CoCrCuFeNiB high-entropy alloy and the low-carbon steel in a 3.5wt.% NaCl solution show that the corrosion rate of the high-entropy alloy is obviously lower than that of the low-carbon steel.
The main function of the metal part surface treatment technology is to form a compact oxide protective layer on the surface of the metal part, so that the metal part can be fully isolated from direct contact with external moisture and oxygen, and further the metal part is prevented from losing efficacy in the use process due to severe oxidation reaction. At the same time, the coating should have extremely slow surface oxidation growth kinetics and maintain a tight and firm bond with the substrate and a continuous and complete interface structure when the substrate is deformed. Therefore, the high-entropy alloy is introduced to the surface of the metal part for corrosion prevention, the oxidation resistance and corrosion resistance of the coating are enhanced by utilizing the unique slow diffusion effect of the high-entropy alloy, and the storage life of the metal part is expected to be greatly prolonged.
The rapid development of additive manufacturing technology, known as the most marked production tool of the third industrial revolution, not only makes it possible to prepare alloy parts with excellent properties, but also shows unique technical advantages in the surface modification direction of alloy parts. For example, in the laser cladding technology, a selected coating material is placed on the surface of a coated substrate, and is simultaneously melted with the substrate through laser irradiation, and a surface coating which has low dilution and is metallurgically combined with the substrate material is formed after the surface coating is rapidly solidified, so that the characteristics of wear resistance, corrosion resistance, heat resistance, oxidation resistance and the like of the surface of the substrate material are obviously improved. However, laser has the characteristics of ultrahigh energy density and thermodynamic and kinetic loading far away from an equilibrium state as an energy source of a cladding technology, and when the laser acts on the alloy cladding process, a large amount of heat is introduced to form a millimeter-sized molten pool on the surface of a metal part, so that the substrate dilution and the deformation of a thin-wall part are caused, and the application of the laser cladding technology to the corrosion prevention of the metal part is limited by the above problems. Therefore, the problem that the metal matrix is diluted and the thin-walled part is easy to deform in the laser cladding process of the surface of the metal part is one of the bottleneck problems that whether the laser cladding technology can be applied to the surface corrosion prevention of the metal part.
The ultra-high speed laser cladding technology is a novel cladding technology developed by researchers at Fraunhofer ILT and Aachen industry university (RWTH-Aachen) in germany, which has been produced and awarded the 2017 Fraunhofer innovation prize (highest awards of Fraunhofer). The ultra-high speed laser cladding technology is characterized in that an additive material and the surface of a base material moving at a high speed are simultaneously melted by laser in a synchronous powder feeding mode, and a cladding layer which has an extremely low dilution rate and is metallurgically bonded with the base body is formed after the additive material and the surface of the base material are rapidly solidified. Compared with the common laser cladding, the key of the ultra-high-speed cladding process is that powder particles are melted by laser above a molten pool. This means that the powder material enters the molten pool in a liquid state instead of a solid particle state, so that the cladding layer is more uniform, the melting amount of the laser to the base material is very limited, and the laser only has the depth of a few micrometers of the surface instead of a millimeter scale, so that the dilution rate of the base material and the deformation of a thin-wall part can be effectively reduced, but the corrosion resistance of the prepared high-entropy alloy laser cladding layer is lower. Therefore, how to improve the corrosion resistance of the high-entropy alloy laser cladding layer becomes a problem to be solved in the field.
Disclosure of Invention
The invention aims to provide high-entropy alloy powder and a preparation method thereof, and a high-entropy alloy laser cladding layer and a preparation method thereof. The high-entropy alloy laser cladding layer prepared from the high-entropy alloy powder provided by the invention has excellent corrosion resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides high-entropy alloy powder, which comprises the following chemical components in atomic percentage: 10 to 40 percent of Fe, 13 to 20 percent of Al, 10 to 20 percent of Cr, 14 to 25 percent of Ti and 10 to 25 percent of Zr.
Preferably, the chemical composition comprises, in atomic percent: 15 to 35 percent of Fe, 15 to 18 percent of Al, 13 to 15 percent of Cr, 15 to 20 percent of Ti and 15 to 20 percent of Zr.
Preferably, the particle size of the high-entropy alloy powder is 15-100 μm.
The invention also provides a preparation method of the high-entropy alloy powder, which comprises the following steps:
(1) Melting the raw materials to obtain an alloy melt;
(2) And (2) carrying out gas atomization on the alloy melt obtained in the step (1) to prepare powder, so as to obtain high-entropy alloy powder.
Preferably, the temperature of melting in the step (1) is 1600 to 2000 ℃.
Preferably, the pressure of the gas atomization powder preparation in the step (2) is 0.2-0.5 MPa.
The invention also provides a high-entropy alloy laser cladding layer, which is prepared from the high-entropy alloy powder or the high-entropy alloy powder prepared by the preparation method in the technical scheme.
The invention also provides a preparation method of the high-entropy alloy laser cladding layer, which comprises the following steps:
and preparing the high-entropy alloy laser cladding layer on the surface of the base material by adopting an ultra-high-speed laser cladding technology.
Preferably, the process parameters of the ultra-high speed laser cladding technology include: the axial rotation speed of the revolving body is 50-200 r/min, the laser power is 1000-5000W, the scanning linear speed is 30-500 m/min, the single-channel width is 0.8-2.0 mm, the lap joint rate is 50-80%, the powder feeding amount is 5-20 g/min, and the defocusing amount is 1-5 mm.
Preferably, the thickness of the high-entropy alloy laser cladding layer is 50-2000 μm.
The invention provides high-entropy alloy powder, which comprises the following chemical components in atomic percentage: 10 to 40 percent of Fe, 13 to 20 percent of Al, 10 to 20 percent of Cr, 14 to 25 percent of Ti and 10 to 25 percent of Zr. The high-entropy alloy is prepared from five components of Fe, al, cr, ti and Zr, and has excellent corrosion resistance by controlling the content of the five components. Experimental results show that the high-entropy alloy laser cladding layer prepared by the high-entropy alloy powder provided by the invention has corrosion performance superior to that of 316 stainless steel in a NaCl solution with the content of 3.5 percent.
Drawings
FIG. 1 is a macroscopic view of the high-entropy alloy laser cladding layers prepared in examples 2 to 4;
FIG. 2 is a cross-sectional structure morphology of the high-entropy alloy laser cladding layer prepared in example 2;
FIG. 3 is a cross-sectional structure of the high-entropy alloy laser cladding layer prepared in example 3;
FIG. 4 is a cross-sectional structure of the high-entropy alloy laser cladding layer prepared in example 4;
FIG. 5 is a phase XRD representation of the high entropy alloy laser cladding layers prepared in examples 2-4;
FIG. 6 is an anodic polarization curve of the high-entropy alloy laser cladding layer prepared in examples 2 to 4 with 316 stainless steel in 3.5% NaCl solution.
Detailed Description
The invention provides high-entropy alloy powder, which comprises the following chemical components in atomic percentage: 10 to 40 percent of Fe, 13 to 20 percent of Al, 10 to 20 percent of Cr, 14 to 25 percent of Ti and 10 to 25 percent of Zr.
The high-entropy alloy powder provided by the invention comprises 10-40% of Fe, preferably 15-35%, and more preferably 20-30% in atomic percentage. According to the invention, a certain amount of Fe element is added, so that the Fe element can be matched with other components, and the corrosion resistance of the high-entropy alloy is improved.
The high-entropy alloy powder provided by the invention comprises 13-20% of Al, preferably 15-18% of Al, and more preferably 16-17% of Al in atomic percentage. According to the invention, a certain amount of Al element is added, so that the Al element can be matched with other components, and the corrosion resistance of the high-entropy alloy is improved.
The high-entropy alloy powder provided by the invention comprises 10-20% of Cr, preferably 13-15% of Cr, and more preferably 14% of Cr in atomic percentage. According to the invention, a certain amount of Cr element is added, so that the Cr element can be matched with other components, and the corrosion resistance of the high-entropy alloy is improved.
The high-entropy alloy powder provided by the invention comprises 14-25% of Ti, preferably 15-20% of Ti, and more preferably 16-18% of Ti in atomic percentage. According to the invention, a certain amount of Ti element is added, so that the Ti element can be matched with other components, and the corrosion resistance of the high-entropy alloy is improved.
The high-entropy alloy powder provided by the invention comprises 10-25% of Zr, preferably 15-20%, and more preferably 16-18% by atom percentage. According to the invention, a certain amount of Zr element is added, so that the Zr element can be matched with other components, and the corrosion resistance of the high-entropy alloy is improved.
In the present invention, the particle size of the high-entropy alloy powder is preferably 15 to 100 μm. The particle size of the high-entropy alloy powder is in the range, so that the preparation of the high-entropy alloy laser cladding layer by the ultra-high-speed laser cladding technology is facilitated.
The high-entropy alloy is prepared from five components of Fe, al, cr, ti and Zr, and has excellent corrosion resistance by controlling the content of the five components.
The invention also provides a preparation method of the high-entropy alloy powder, which comprises the following steps:
(1) Melting the raw materials to obtain an alloy melt;
(2) And (2) carrying out gas atomization on the alloy melt obtained in the step (1) to prepare powder, so as to obtain high-entropy alloy powder.
The invention melts the raw materials to obtain the alloy melt.
The source of the raw materials is not particularly limited in the present invention, and the raw materials can be prepared by a commercially available product or a well-known preparation method which is well known to those skilled in the art.
In the present invention, the temperature of the melting is preferably 1600 to 2000 ℃, more preferably 1800 to 1900 ℃. The melting time is not particularly limited in the present invention, as long as the raw materials are completely melted.
In the present invention, the melting is preferably high frequency induction melting; the heating power supply current for the high-frequency induction melting is preferably 30 to 55A, more preferably 40 to 50A.
After the alloy melt is obtained, the invention carries out gas atomization on the alloy melt to prepare powder, and high-entropy alloy powder is obtained.
In the invention, the gas atomization pulverization is preferably inert gas atomization; the inert gas is preferably argon; the pressure of the gas atomization powder preparation is preferably 0.2-0.5 MPa. The invention uses high-pressure nitrogen as a gas phase atomizing medium to obtain the powdery high-entropy alloy.
After the gas atomization powder preparation is finished, the product obtained by the gas atomization powder preparation is preferably dried to obtain the high-entropy alloy powder.
In the present invention, the temperature of the drying is preferably 100 to 150 ℃; the drying time is preferably 1 to 3 hours; the drying is preferably carried out in a vacuum drying oven. The type of the vacuum drying oven is not particularly limited in the invention, and instruments and equipment well known to those skilled in the art can be adopted.
The preparation method of the high-entropy alloy powder provided by the invention is simple in process and is suitable for industrial production.
The invention also provides a high-entropy alloy laser cladding layer, which is prepared from the high-entropy alloy powder or the high-entropy alloy powder prepared by the preparation method in the technical scheme. The high-entropy alloy laser cladding layer provided by the invention has excellent corrosion resistance.
The invention also provides a preparation method of the high-entropy alloy laser cladding layer, which comprises the following steps:
and preparing the high-entropy alloy laser cladding layer on the surface of the base material by adopting an ultra-high-speed laser cladding technology.
In the present invention, the material of the base is preferably a rotator metal material. The source of the substrate is not particularly limited in the present invention, and a substrate known to those skilled in the art may be used.
In the present invention, the substrate is preferably ground before use. In the invention, the grinding is preferably performed by using metallographic abrasive paper or a grinding machine. The specific operation of the polishing is not specially limited, and the polishing is carried out according to the requirement of the required surface roughness.
After polishing, the polished substrate is preferably wiped by ethanol. The present invention is not particularly limited to the specific operation of the wiping operation, as long as it is ensured that the powdery impurities on the surface of the base material obtained by polishing are removed.
In the present invention, the process parameters of the ultra-high speed laser cladding technology preferably include: the axial rotation speed of the revolving body is 50-200 r/min, the laser power is 1000-5000W, the scanning linear speed is 30-500 m/min, the width of a single channel is 0.8-2.0 mm, the lap joint rate is 50-80%, the powder feeding amount is 5-20 g/min, and the defocusing amount is 1-5 mm; further preferably: the axial rotation speed of the revolving body is 100-150 r/min, the laser power is 1800-2200W, the scanning linear speed is 40-100 m/min, the width of a single channel is 1-2.0 mm, the lap joint rate is 60-75%, the powder feeding amount is 8.1-15 g/min, and the defocusing amount is 1-4 mm; more preferably: the axial rotation speed of the revolving body is 120-150 r/min, the laser power is 2000-2200W, the scanning linear speed is 40-500 m/min, the width of a single channel is 1-1.5 mm, the lap joint rate is 70-75%, the powder feeding amount is 11.5-15 g/min, and the defocusing amount is 3-4 mm. The invention can further improve the corrosion resistance, wear resistance and irradiation resistance of the high-entropy alloy laser cladding layer by controlling the technological parameters of the ultra-high-speed laser cladding technology.
In the invention, the ultra-high speed laser cladding technology is preferably carried out in a protective atmosphere; the protective atmosphere is preferably argon; the flow rate of the argon gas is preferably 10 to 20L/min.
In the invention, the thickness of the high-entropy alloy laser cladding layer is preferably 50-2000 μm.
The invention combines the low diffusion coefficient of the high-entropy alloy with the low heat input characteristic of the ultrahigh-speed laser cladding technology to the base material, so as to solve the problems of dilution of the base body and deformation of the thin-wall part in the laser cladding process while improving the corrosion resistance of the metal part, realize the controllable preparation of the ultrahigh-speed laser high-entropy alloy coating, and have the advantages of high preparation efficiency, good metallurgical quality of the cladding layer, extremely low dilution rate of the base body, small deformation, strong functionality, high automation degree, high commercial value and the like.
The preparation method provided by the invention can rapidly prepare the large-area high-entropy alloy corrosion-resistant, wear-resistant and irradiation-resistant cladding layer in a short time, so that the working efficiency is improved, and the quality of the coating is improved.
The ultra-high-speed laser cladding system adopted by the invention mainly comprises a high-speed cladding laser, a high-speed laser cladding head, a powder feeder, a water cooler, a voltage stabilizing source, a rotary machine tool and a manipulator, and the operation is automatically completed after a program and corresponding laser process parameters are set; saving materials, high commercial value: compared with the traditional laser cladding, the ultra-high speed laser cladding has the ultra-thin coating with the thickness interval of 50-2000 mu m, so that cladding materials can be effectively saved, and the cost is saved; the function of the coating is to protect the substrate so that it is possible to use inexpensive metals for the substrate, thereby creating further economic benefits.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The high-entropy alloy powder comprises the following chemical components in atomic percentage: 10% of Fe, 20% of Al, 20% of Cr, 25% of Ti and 25% of Zr; the grain diameter is 15-100 mu m;
the preparation method of the high-entropy alloy powder comprises the following steps:
(1) Carrying out high-frequency induction melting on the raw materials to obtain an alloy melt; wherein the melting temperature is 1600 ℃; the melting heating power supply current is 30A;
(2) Carrying out gas atomization powder preparation on the alloy melt obtained in the step (1) in argon, and drying in a vacuum drying oven to obtain high-entropy alloy powder; wherein the pressure of the gas atomization powder preparation is 0.5MPa; the drying temperature is 100 ℃ and the drying time is 1h.
Example 2
The preparation method of the high-entropy alloy laser cladding layer comprises the following steps:
polishing and wiping a Zr-4 metal revolving body base material with ethanol, putting the high-entropy alloy powder prepared in the example 1 into a powder feeder charging barrel, and preparing a high-entropy alloy laser cladding layer with the thickness of 150 mu m on the surface of the base material by adopting an ultra-high speed laser cladding technology; the technological parameters of the ultra-high speed laser cladding technology are as follows: the axial rotation speed of the revolving body is 150r/min, the laser power is 1800W, the scanning linear speed is 40m/min, the width of a single channel is 1.0mm, the lap joint rate is 75%, the powder feeding amount is 6g/min, and the defocusing amount is 3mm; the ultra-high speed laser cladding technology is carried out in argon atmosphere; the flow rate of the argon is 18L/min; and adjusting the laser cladding head to be vertical to the axial direction of the base material, enabling the base material to do high-speed rotary motion, and enabling the high-speed laser cladding head to do linear motion parallel to the axial direction of the base material according to the requirements of the rotation speed and the lap joint rate of the base material.
Example 3
The preparation method of the high-entropy alloy laser cladding layer comprises the following steps:
after polishing and ethanol wiping are carried out on the Zr-4 metal revolving body base material, the high-entropy alloy powder prepared in the example 1 is placed into a powder feeder charging barrel, and a high-speed laser cladding technology is adopted to prepare a high-entropy alloy laser cladding layer with the thickness of 150 mu m on the surface of the base material; the technological parameters of the ultra-high speed laser cladding technology are as follows: the axial rotation speed of the revolving body is 200r/min, the laser power is 2000W, the scanning linear speed is 40m/min, the width of a single channel is 1.0mm, the lap joint rate is 75%, the powder feeding amount is 8.1g/min, and the defocusing amount is 3mm; the ultra-high speed laser cladding technology is carried out in an argon atmosphere; the flow rate of the argon is 18L/min; and adjusting the laser cladding head to be vertical to the axial direction of the base material, enabling the base material to do high-speed rotary motion, and enabling the high-speed laser cladding head to do linear motion parallel to the axial direction of the base material according to the requirements of the rotation speed and the lap joint rate of the base material.
Example 4
The preparation method of the high-entropy alloy laser cladding layer comprises the following steps:
polishing and wiping a Zr-4 metal revolving body base material with ethanol, putting the high-entropy alloy powder prepared in the example 1 into a powder feeder charging barrel, and preparing a high-entropy alloy laser cladding layer with the thickness of 150 mu m on the surface of the base material by adopting an ultra-high speed laser cladding technology; the technological parameters of the ultra-high speed laser cladding technology are as follows: the axial rotation speed of the revolving body is 200r/min, the laser power is 2200W, the scanning linear speed is 40m/min, the width of a single channel is 1.0mm, the lap joint rate is 75%, the powder feeding amount is 11.5g/min, and the defocusing amount is 3mm; the ultra-high speed laser cladding technology is carried out in argon atmosphere; the flow rate of the argon is 18L/min; and adjusting the laser cladding head to be vertical to the axial direction of the base material, enabling the base material to do high-speed rotary motion, and enabling the high-speed laser cladding head to do linear motion parallel to the axial direction of the base material according to the requirements of the rotation speed and the lap joint rate of the base material.
The macroscopic view of the high-entropy alloy laser cladding layers prepared in examples 2 to 4 is shown in FIG. 1. As can be seen from FIG. 1, the high-entropy alloy laser cladding layer can be prepared by adopting the ultra-high-speed laser cladding technology.
The cross-sectional structure morphologies of the high-entropy alloy laser cladding layers prepared in examples 2 to 4 are shown in fig. 2 to 4, respectively.
As can be seen from FIGS. 2 to 4, the high-entropy alloy laser cladding layer has uniform structure and no obvious defects.
The phase XRD characterization of the high-entropy alloy laser cladding layers prepared in examples 2-4 is shown in FIG. 5.
As can be seen from FIG. 5, the high-entropy alloy laser cladding layers prepared by the method are all single-phase face-centered cubic solid solutions.
The anodic polarization curve of the high-entropy alloy laser cladding layers prepared in examples 2 to 4 in 3.5% NaCl solution with 316 stainless steel is shown in FIG. 6.
As can be seen from FIG. 6, the corrosion performance of the high-entropy alloy laser cladding layer prepared by the present invention in 3.5% NaCl solution was better than that of 316 stainless steel, indicating that the high-entropy alloy laser cladding layer prepared by the present invention has excellent corrosion resistance.
From the above embodiments, it can be seen that the high-entropy alloy laser cladding layer prepared from the high-entropy alloy powder provided by the invention has excellent corrosion resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high-entropy alloy powder comprises the following chemical components in atomic percentage: 10 to 40 percent of Fe, 13 to 20 percent of Al, 10 to 20 percent of Cr, 14 to 25 percent of Ti and 10 to 25 percent of Zr.
2. A high entropy alloy powder according to claim 1, wherein the chemical composition is, in atomic percent: 15 to 35 percent of Fe, 15 to 18 percent of Al, 13 to 15 percent of Cr, 15 to 20 percent of Ti and 15 to 20 percent of Zr.
3. A high-entropy alloy powder according to claim 1 or 2, wherein the particle size of the high-entropy alloy powder is 15 to 100 μm.
4. The method of making the high entropy alloy powder of any one of claims 1~3, comprising the steps of:
(1) Melting the raw materials to obtain an alloy melt;
(2) And (2) carrying out gas atomization on the alloy melt obtained in the step (1) to prepare powder, so as to obtain high-entropy alloy powder.
5. The method according to claim 4, wherein the melting temperature in the step (1) is 1600 to 2000 ℃.
6. The method according to claim 4, wherein the pressure for pulverizing by air atomization in step (2) is 0.2 to 0.5MPa.
7. A high-entropy alloy laser cladding layer is prepared from the high-entropy alloy powder of any one of claims 1~3 or the high-entropy alloy powder prepared by the preparation method of any one of claims 4~6.
8. A method for preparing the high-entropy alloy laser cladding layer of claim 7, comprising the steps of:
and preparing the high-entropy alloy laser cladding layer on the surface of the base material by adopting an ultra-high-speed laser cladding technology.
9. The method for preparing the ultra-high speed laser cladding material according to claim 8, wherein the process parameters of the ultra-high speed laser cladding technology comprise: the axial rotation speed of a revolving body is 50 to 200r/min, the laser power is 1000 to 5000W, the scanning linear speed is 30 to 500m/min, the single channel width is 0.8 to 2.0mm, the lap joint rate is 50 to 80%, the powder feeding amount is 5 to 20g/min, and the defocusing amount is 1 to 5mm.
10. The production method according to claim 8, wherein the thickness of the high-entropy alloy laser cladding layer is 50 to 2000 μm.
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| CN107513694A (en) * | 2017-08-22 | 2017-12-26 | 四川大学 | A kind of zirconium cladding surface resistance to high temperature oxidation ZrCrFe/AlCrFeTiZr complex gradient coating preparation technologies |
| CN108165866A (en) * | 2017-12-28 | 2018-06-15 | 西安西工大超晶科技发展有限责任公司 | A kind of preparation method of polynary high-entropy alloy |
| CN113061763A (en) * | 2021-03-23 | 2021-07-02 | 广东省科学院智能制造研究所 | High-entropy alloy and preparation method thereof |
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| CN108165866A (en) * | 2017-12-28 | 2018-06-15 | 西安西工大超晶科技发展有限责任公司 | A kind of preparation method of polynary high-entropy alloy |
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