CN111850550A - WC reinforced high-entropy alloy powder for laser cladding and coating preparation method - Google Patents
WC reinforced high-entropy alloy powder for laser cladding and coating preparation method Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 55
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
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- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 239000011651 chromium Substances 0.000 abstract description 5
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 4
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- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Classifications
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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
-
- B22F1/0003—
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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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)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a WC reinforced high-entropy alloy powder for laser cladding and a preparation method of a coating, wherein the WC reinforced high-entropy alloy powder consists of the following substances: iron, cobalt, chromium, nickel, silicon, boron, tungsten carbide and yttrium oxide. The preparation method of the coating comprises the following steps: mixing the high-entropy alloy powder for laser cladding, putting the mixture into a ball mill for ball milling, and performing multi-channel laser cladding by using a ruby laser or a CO2 laser with the power of 1-2 KW in a preset powder cladding or synchronous powder feeding cladding mode to prepare a cladding. The invention can realize good metallurgical bonding of the coating and the matrix, can be used for preparing a fine-grain alloy coating containing a strengthening phase, and can be used for high-precision manufacturing and remanufacturing of coatings with high crack resistance, high temperature resistance, wear resistance and corrosion resistance. The alloy coating prepared by the method can greatly reduce the production cost of preparing the alloy coating by using rare earth metal, and has important economic value and popularization significance.
Description
Technical Field
The invention relates to alloy powder and a method, in particular to WC reinforced high-entropy alloy powder for laser cladding and a preparation method of a coating.
Background
The laser cladding technology is a novel surface engineering technology emerging in the last 70 years, and a cladding material is added on the surface of a base material and fused together with a thin layer on the surface of the base material by utilizing a laser beam with high energy density, so that a material adding cladding layer which is metallurgically bonded with the surface of a base layer can be formed on the surface of the base layer. The cladding layer can obviously improve the wear-resisting, corrosion-resisting, heat-resisting, oxidation-resisting and electrical properties of the surface of the base layer, thereby achieving the purpose of surface modification or repair, not only meeting the requirements on the specific properties of the surface of the material, but also saving a large amount of noble elements, and therefore, the application prospect of the laser cladding technology is very wide.
The cladding material for laser cladding is usually added in the form of powder, wire, plate, among which the powder is most commonly used. Most of alloy powder in the prior art adopts rare earth elements as main systems, such as neodymium, zirconium, tantalum and the like, and has the defect of higher development and application cost, and along with the increase of material application scenes, the corrosion resistance requirements of people on mechanical equipment and part materials are higher and higher, and the existing alloy powder can not meet the requirements of people on the corrosion resistance of a coating.
The high-entropy alloy is also called multi-principal-element high-disorder-degree alloy, and the types of main alloy elements are required to be 5 or more than 5, and the content of each element is more than 5%. The high entropy effect enables the alloy to easily generate a solid solution phase, so that the improvement space of the hardness, the strength and the wear resistance of the alloy is limited; in addition, a large number of cracks are easily generated in the laser cladding process of the high-entropy alloy, so that the corrosion resistance of a cladding layer is greatly reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides WC reinforced high-entropy alloy powder for laser cladding and a preparation method of a coating.
In order to solve the technical problems, the invention adopts the technical scheme that: the WC reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
further, the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
further, the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
a preparation method of a coating of WC reinforced high-entropy alloy powder for laser cladding comprises the following specific steps:
placing the WC reinforced high-entropy alloy powder for laser cladding into a ball mill, and carrying out ball milling for 1-2 h under the protection of argon gas, wherein the ball milling speed is 300-400 r/min;
after ball milling is finished, pre-placing the powder on a 45 steel or 65Mn steel substrate, wherein the pre-placing thickness is 400-800 mu m, and the binder adopts rosin alcohol solution or glass water;
drying the preset layer, and performing multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used technological parameter range is as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
A preparation method of a coating of WC reinforced high-entropy alloy powder for laser cladding comprises the following specific steps:
placing the WC reinforced high-entropy alloy powder for laser cladding into a ball mill, and carrying out ball milling for 1-2 h under the protection of argon gas, wherein the ball milling speed is 300-400 r/min; after the ball milling is finished, screening powder with the granularity range of 150-300 meshes by using a powder screening machine to serve as finished powder; and then carrying out synchronous powder feeding laser cladding on a 45 steel or 65Mn steel substrate, and carrying out multi-pass cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
The invention discloses WC reinforced high-entropy alloy powder for laser cladding, which is tungsten carbide (WC) reinforced high-entropy alloy powder for laser cladding, and the phase structure of a coating obtained by adopting the powder is a WC particle reinforced solid solution structure, so that the coating has the advantages of high hardness, normal temperature abrasion resistance, high temperature abrasion resistance and the like; yttrium oxide (Y) with fine grain effect2O3) The granule can be used for obtaining a cladding layer with refined grains, and obviously improves the toughness and the crack resistance of the cladding layer while improving the strength and the hardness of the cladding layer;
the invention also provides a preparation method of the coating of the WC reinforced high-entropy alloy powder for laser cladding, the content of main elements in the coating obtained by the preparation method accords with the definition of the nominal high-entropy alloy, and the coating has no crack, so that the coating has excellent corrosion resistance.
Drawings
FIG. 1 is a diagram showing the phase detection results by X-ray diffraction method in examples 1 to 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention discloses WC reinforced high-entropy alloy powder for laser cladding, which consists of the following substances in percentage by mass:
further, the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
further, the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
the invention discloses WC reinforced high-entropy alloy powder for laser cladding, which is WC reinforced high-entropy alloy powder for laser cladding, and adopts cobalt, iron, chromium, nickel, silicon, boron, tungsten carbide (WC) and yttrium oxide (Y) with the purity higher than 99.7 percent2O3) And (3) preparing powder. Compared with the noble metal materials such as niobium (Nb), zirconium (Zr) and the like commonly used in the existing high-entropy alloy material, the powder raw materials adopted by the invention are all common powder with low price, the acquisition is simple, and the production cost for preparing the alloy coating is greatly reduced; meanwhile, the dilution of the coating by the matrix material and the burning loss of alloy elements in the laser cladding process are considered, and the nominal high-entropy alloy coating is obtained by adjusting the element components; also consider adding WC and Y2O3The influence on the fluidity of a molten pool strictly controls WC and Y in the alloy2O3The content of (a).
Therefore, the WC-reinforced high-entropy alloy powder for laser cladding is obtained through reasonable compatibility, and the alloy powder can obtain a solid solution structure with a coating layer of WC particles reinforced, so that the coating layer has the advantages of high hardness, normal-temperature wear resistance, high-temperature wear resistance and the like; meanwhile, the alloy powder has Y with fine grain effect2O3Particles with which grain-refined cladding layers can be obtainedThe toughness and the crack resistance of the coating are obviously improved while the strength and the hardness of the coating are high; and the content of main elements in the prepared coating accords with the nominal high-entropy alloy definition, and the coating has no crack, so that the coating has excellent corrosion resistance.
The invention also discloses a preparation method of the coating of the WC-reinforced high-entropy alloy powder for laser cladding, which comprises the following steps:
sequentially weighing cobalt, iron, chromium, nickel, silicon, boron, tungsten carbide and yttrium oxide powder with corresponding mass; uniformly mixing the weighed components, putting the mixture into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling speed is 300-400 r/min;
the powder preparation mechanism is adopted for cladding layer (preset powder cladding): firstly, machining the surface of a 45 steel or 65Mn steel base material by using a grinding machine to ensure that the surface is smooth and flat; cleaning with acetone to remove oil stains and dirt on the surface, presetting alloy powder on the surface of the steel substrate, wherein the preset thickness is 400-800 mu m, and adopting rosin alcohol solution or glass water as a binder; and then putting the steel base material into a drying box for drying treatment, taking out the dried steel base material and the preset layer, and carrying out multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameter ranges are as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
Meanwhile, the preparation method of the coating of the WC-reinforced high-entropy alloy powder for laser cladding can also adopt the following specific method:
sequentially weighing cobalt, iron, chromium, nickel, silicon, boron, tungsten carbide and yttrium oxide powder with corresponding mass; uniformly mixing the weighed components, putting the mixture into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling speed is 300-400 r/min;
the powder preparation mechanism is adopted for cladding (synchronous powder feeding cladding): and after the ball milling is finished, screening out powder with the granularity of 150-300 meshes by using a powder screening machine to serve as finished powder. Firstly, machining the surface of a 45 steel or 65Mn steel base material by using a grinding machine to ensure that the surface is smooth and flat; and then acetone is used for cleaning and removing oil stains and dirt on the surface. Carrying out multi-pass cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used technological parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
By adopting the technical scheme, the invention can realize good metallurgical bonding of the coating and the substrate, can enhance the crack resistance of the high-entropy alloy cladding layer on the premise of improving the strength, hardness and wear resistance of the coating, and the prepared alloy coating has excellent corrosion resistance. The high-entropy alloy coating is particularly suitable for surface cladding of key parts in an extreme service environment, and has important production meaning and popularization value.
The effect of the present invention will be further described with reference to the following specific examples.
[ EXAMPLES one ]
The embodiment discloses a WC-reinforced high-entropy alloy powder for laser cladding and a coating preparation method.
The WC-reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
the method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. After ball milling is finished, alloy powder is preset on the surface of a 45-steel substrate, the preset thickness is 400 microns, and a bonding agent adopts rosin alcohol solution or glass water; and then putting the steel base material into a drying box for drying treatment, taking out the dried steel base material and the preset layer, and carrying out multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameter ranges are as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
[ example two ]
The embodiment discloses a WC-reinforced high-entropy alloy powder for laser cladding and a coating preparation method.
The WC-reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
the method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. After ball milling is finished, alloy powder is preset on the surface of a 45-steel substrate, the preset thickness is 400 microns, and a bonding agent adopts rosin alcohol solution or glass water; and then putting the steel base material into a drying box for drying treatment, taking out the dried steel base material and the preset layer, and carrying out multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameter ranges are as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
[ EXAMPLE III ]
The embodiment discloses a WC-reinforced high-entropy alloy powder for laser cladding and a coating preparation method.
The WC-reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
the method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. After ball milling is finished, alloy powder is preset on the surface of a 45-steel substrate, the preset thickness is 400 microns, and a bonding agent adopts rosin alcohol solution or glass water; and then putting the steel base material into a drying box for drying treatment, taking out the dried steel base material and the preset layer, and carrying out multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameter ranges are as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
[ EXAMPLE IV ]
The embodiment discloses a WC-reinforced high-entropy alloy powder for laser cladding and a coating preparation method.
The WC-reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
the method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. And after the ball milling is finished, screening out powder with the granularity of 150-300 meshes by using a powder screening machine to serve as finished powder. And then carrying out synchronous powder feeding and multi-pass cladding on the surface of the 45 steel matrix by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
[ EXAMPLE V ]
The method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. And after the ball milling is finished, screening out powder with the granularity of 150-300 meshes by using a powder screening machine to serve as finished powder. And then carrying out synchronous powder feeding and multi-pass cladding on the surface of the 45 steel matrix by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
[ EXAMPLE six ]
The embodiment discloses a WC-reinforced high-entropy alloy powder for laser cladding and a coating preparation method.
The WC-reinforced high-entropy alloy powder for laser cladding comprises the following substances in percentage by mass:
the method for preparing the coating by using the WC-reinforced high-entropy alloy powder for laser cladding specifically comprises the following steps:
and (3) preparing alloy powder according to the mass fraction, putting the prepared powder into a ball mill, and carrying out ball milling under the protection of argon, wherein the ball milling time is 1-2 h, and the ball milling rotating speed is 300-400 r/min, so that the pre-alloying effect is achieved. And after the ball milling is finished, screening out powder with the granularity of 150-300 meshes by using a powder screening machine to serve as finished powder. And then carrying out synchronous powder feeding and multi-pass cladding on the surface of the 45 steel matrix by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
Examples 1-6 above are further illustrated by the results of energy spectrum analysis (EDS) detection and X-ray diffraction (XRD) detection.
Judging whether the prepared alloy cladding layer is a nominal high-entropy alloy cladding layer or not according to an energy spectrum analysis (EDS) detection result, judging the phase composition of the prepared alloy cladding layer according to an X-ray diffraction (XRD) detection result, and judging the mechanical property characteristic of the cladding layer according to the microhardness distribution characteristic of the cladding layer.
First, as shown in table 1, the EDS results of the coatings of examples 1 to 6, i.e., the atomic percentages of the respective elements in the coatings, were obtained. According to the detection results in table 1, the burning loss of B, C and Si elements in the cladding is relatively serious, and the definitions of the nominal high-entropy alloys cannot be met in examples 1 and 4, although the cladding of examples 1 and 4 cannot meet the definitions of the nominal high-entropy alloys, the definition of the high-entropy alloys that the alloy powder itself meets is not affected, and the content of tungsten carbide in examples 1 and 4 is high, so that the hardness of the cladding can be greatly improved, and the cladding of examples 1 and 4 still has good practical application significance under the use condition that the requirement on hardness is high; the contents of Fe, Co, Cr, Ni and W in examples 2, 3, 5 and 6 are all higher than 5%, and satisfy the definition of nominal high-entropy alloy.
Secondly, the XRD test results of examples 1-3 are shown in FIG. 1, from which it can be seen that the phase composition of the cladding layer is closely related to the WC content. When the WC content is low, as in example 3, the cladding consists of face centered cubic γ (Fe, Ni) and body centered cubic α (Fe, Co) solid solutions; when the WC content is high, as in example 2, a carbide strengthening phase is generated in the clad layer in addition to the two solid solutions, which proves the strengthening effect of WC in the clad layer; while the WC content continues to increase, as in example 1, the cladding actually transforms into an Fe-based alloy, creating various compounds in the cladding that act as further strengthening. For examples 4-6, since the composition is the same as that of examples 1-3, the trend of XRD detection results should be similar to that of FIG. 1 in theory, and therefore, it is not shown.
TABLE 1 EDS test results for coatings in examples 1-6
The invention combines the powder making and laser cladding technology through reasonable formula design, and can obtain the alloy coating with good forming and no cracks. The high-entropy alloy is composed of multiple components, the lattice distortion of the formed solid solution is large, and under the action of WC, the dislocation slip resistance is large, and the strength is improved; boron element can form eutectic structures with low melting points with most alloys, and the coating forming effect can be greatly improved by adding boron and silicon elements to improve the self-fluxing property. When Y is2O3When the content is higher, the grain size of the coating is obviously refined. In addition, elements such as silicon, boron and the like can perform a deoxidation effect on the interior of the molten pool in the laser cladding process, so that good metallurgical bonding of the cladding and the matrix is realized, and the cladding efficiency is higher.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (5)
1. The WC reinforced high-entropy alloy powder for laser cladding is characterized in that: the WC reinforced high-entropy alloy powder consists of the following substances in percentage by mass:
2. the WC-reinforced high-entropy alloy powder for laser cladding as claimed in claim 1, wherein: the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
3. the WC-reinforced high-entropy alloy powder for laser cladding as claimed in claim 1, wherein: the WC reinforced high-entropy alloy powder comprises the following components in percentage by mass:
4. a method for preparing a coating of WC reinforced high-entropy alloy powder as recited in any one of claims 1 to 3, wherein the method comprises: the preparation method of the coating comprises the following steps:
placing the WC reinforced high-entropy alloy powder for laser cladding into a ball mill, and carrying out ball milling for 1-2 h under the protection of argon gas, wherein the ball milling speed is 300-400 r/min;
after ball milling is finished, pre-placing the powder on a 45 steel or 65Mn steel substrate, wherein the pre-placing thickness is 400-800 mu m, and the binder adopts rosin alcohol solution or glass water;
drying the preset layer, and performing multi-channel laser cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used technological parameter range is as follows: 1.2-1.6 KW laser power, 150-300 mm/min scanning speed, and inert gas Ar or He gas protection is adopted during cladding.
5. A method for preparing a coating of WC reinforced high-entropy alloy powder as recited in any one of claims 1 to 3, wherein the method comprises: the preparation method of the coating comprises the following steps:
placing the WC reinforced high-entropy alloy powder for laser cladding into a ball mill, and carrying out ball milling for 1-2 h under the protection of argon gas, wherein the ball milling speed is 300-400 r/min; after the ball milling is finished, screening powder with the granularity range of 150-300 meshes by using a powder screening machine to serve as finished powder; and then carrying out synchronous powder feeding laser cladding on a 45 steel or 65Mn steel substrate, and carrying out multi-pass cladding by adopting a 1-2 KW ruby laser or a CO2 laser, wherein the used process parameters are as follows: 1.2-1.6 KW of laser power, 150-300 mm/min of scanning speed and 6-10 g/min of powder feeding speed, and inert gas Ar or He is adopted for protection during cladding.
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