CN112458391A - High-bonding-strength plasma spraying priming powder and preparation method thereof - Google Patents
High-bonding-strength plasma spraying priming powder and preparation method thereof Download PDFInfo
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- CN112458391A CN112458391A CN202011336175.1A CN202011336175A CN112458391A CN 112458391 A CN112458391 A CN 112458391A CN 202011336175 A CN202011336175 A CN 202011336175A CN 112458391 A CN112458391 A CN 112458391A
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- 239000000843 powder Substances 0.000 title claims abstract description 38
- 238000007750 plasma spraying Methods 0.000 title claims abstract description 24
- 230000037452 priming Effects 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 37
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 35
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229920000180 alkyd Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000011258 core-shell material Substances 0.000 claims description 2
- -1 polysiloxane Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 41
- 238000000576 coating method Methods 0.000 abstract description 41
- 230000008021 deposition Effects 0.000 abstract description 8
- 238000012986 modification Methods 0.000 abstract description 8
- 230000004048 modification Effects 0.000 abstract description 8
- 238000005507 spraying Methods 0.000 abstract description 8
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000007751 thermal spraying Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910033181 TiB2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses high-bonding-strength plasma spraying priming powder, which contains nickel, aluminum, silicon carbide and a binder, wherein the binder comprises the following components in percentage by weight: the weight of the adhesive accounts for 1.5 to 4.0 percent of the weight of the raw materials; the raw materials comprise by weight: 10 to 15.0 percent of silicon carbide, 2.5 to 5.0 percent of aluminum and the balance of nickel. The nickel-aluminum coating is uniform, deposition of a silicon carbide coating is facilitated, the coating modification process is novel, the coating modification process can be applied to preparation of other coating type powder materials, the modified silicon carbide powder is high in deposition efficiency and excellent in coating performance, the modified silicon carbide powder for thermal spraying prepared by the method is uniform in coating and high in deposition efficiency, and a coating formed by spraying the modified silicon carbide powder prepared by the method is compact, high in hardness and good in corrosion resistance; meanwhile, the preparation method has the advantages of simple process, easy operation, low production cost, good product quality, large production capacity, economy, reliability, industrial popularization and the like.
Description
Technical Field
The invention belongs to the field of thermal spraying technology and material processing, and particularly relates to high-bonding-strength plasma spraying priming powder. Meanwhile, the invention also relates to a preparation method of the high-bonding-strength plasma spraying priming powder.
Background
The silicon carbide has stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient and good wear resistance, and has other purposes besides being used as an abrasive, for example, the silicon carbide powder is coated on the inner wall of a water turbine impeller or a cylinder body by a special process, so that the wear resistance of the silicon carbide powder can be improved, and the service life of the silicon carbide powder is prolonged by 1-2 times; the high-grade refractory material has the advantages of thermal shock resistance, small volume, light weight, high strength and good energy-saving effect. The low-grade silicon carbide (containing SiC about 85%) is an excellent deoxidizer, and can be used for speeding up steel-making, easily controlling chemical composition and raising steel quality. In addition, silicon carbide is also used in great quantity to make silicon carbide rod for electric heating element.
Because of stable chemical properties, the silicon carbide does not react with chlorine, oxygen, sulfur and strong acid at high temperature, has high heat conductivity coefficient, small thermal expansion coefficient and good wear resistance, has the price of only 1/10-1/30 of hard alloys such as tungsten carbide, chromium carbide and the like, and is an ideal hard-surface coating material. However, when the plasma spraying process is adopted to prepare the silicon carbide coating, the temperature of plasma flame flow is up to 15000 ℃, silicon carbide is sublimated at the temperature of more than 1800 ℃, and the powder is partially decomposed into vapor containing carbon and silicon at high temperature, so that the coating is difficult to form. At present, no silicon carbide powder suitable for plasma spraying exists in the market, and how to fully utilize the physical and chemical properties of silicon carbide to prepare a hard surface coating is one of the research hotspots in the field of thermal spraying materials at present.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and the composite coating layer of the carbonyl nickel powder and the aluminum powder is prepared on the surface of the silicon carbide to realize the surface coating modification of the silicon carbide powder. The nickel-aluminum coating layer firstly generates exothermic reaction in plasma flame flow to generate a nickel-aluminum intermetallic compound and form a liquefied protective film, thereby effectively avoiding the decomposition of silicon carbide, and the high-bonding-strength plasma spraying priming powder and the preparation method thereof are provided.
In order to achieve the purpose, the invention provides the following technical scheme:
a high bond strength plasma spray primer powder comprising nickel, aluminum, silicon carbide and a binder, wherein: the weight of the adhesive accounts for 1.5 to 4.0 percent of the weight of the raw materials; the raw materials comprise by weight: 10 to 15.0 percent of silicon carbide, 2.5 to 5.0 percent of aluminum and the balance of nickel.
Preferably, the binder is one or a mixture of two or more of PVA, PVP, PA, PE, epoxy resin, alkyd resin or polysiloxane.
Preferably, the plasma spraying priming powder is in a core-shell structure.
The invention provides a preparation method of high-bonding-strength plasma spraying priming powder, which comprises the following steps:
s1, putting the raw materials of silicon carbide, aluminum powder and metal nickel powder into a ball mill at room temperature, carrying out mechanical ball milling and mixing for 20-40 minutes, and then separating the ball material by using a screen;
s2, putting the ball-milled raw materials into a stirrer, adding an adhesive accounting for 1.5-4.0% of the weight of the raw materials, and continuously stirring for 10-20 minutes;
s3, transferring the materials into an oven, and keeping the temperature at 40-70 ℃ for 1-5 hours for drying; (4) and sieving the dried material according to the required granularity to obtain the product.
Preferably, the raw materials are added in the mode of superfine silicon carbide powder, superfine aluminum powder and metal nickel powder.
Preferably, the granularity of the silicon carbide is 0.1-5 microns, the granularity of the superfine aluminum powder is 0.5-3 microns, and the granularity of the metal nickel powder is 38-100 microns.
Preferably, the plasma spraying priming powder comprises the following raw materials in percentage by weight: 100 g of nickel powder, 25 g of superfine aluminum powder and 875 g of silicon carbide.
Preferably, the plasma spraying priming powder comprises the following raw materials in percentage by weight: 200 g of nickel powder, 50 g of superfine aluminum powder and 750 g of silicon carbide.
Preferably, the plasma spraying priming powder comprises the following raw materials in percentage by weight: 150 g of nickel powder, 37.5 g of superfine aluminum powder and 812.5 g of silicon carbide.
The invention has the technical effects and advantages that: according to the high-bonding-strength plasma spraying priming powder and the preparation method thereof, nickel and aluminum are uniformly coated, deposition of a silicon carbide coating is facilitated, the coating modification process is novel, the high-bonding-strength plasma spraying priming powder can be applied to preparation of other coating type powder materials, the deposition efficiency of the modified silicon carbide powder is high, and the coating performance is excellent; meanwhile, the preparation method has the advantages of simple process, easy operation, low production cost, good product quality, large production capacity, economy, reliability, industrial popularization and the like;
preparing a layer of composite coating layer of carbonyl nickel powder and aluminum powder on the surface of the silicon carbide to realize the surface coating modification of the silicon carbide powder. The nickel-aluminum coating layer firstly generates an exothermic reaction in plasma flame flow to generate a nickel-aluminum intermetallic compound and form a liquefied protective film, thereby effectively avoiding the decomposition of silicon carbide.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high bond strength plasma spray primer powder comprising nickel, aluminum, silicon carbide and a binder, wherein: the weight of the adhesive accounts for 1.5 to 4.0 percent of the weight of the raw materials; the raw materials comprise by weight: 10 to 15.0 percent of silicon carbide, 2.5 to 5.0 percent of aluminum and the balance of nickel.
Example 1:
1) weighing 100 g of carbonyl nickel powder, 25 g of superfine aluminum powder and 875 g of silicon carbide, putting into a ball mill, performing mechanical ball milling and mixing for 20 minutes, and then separating the ball material by using a screen;
2) putting the ball-milled raw materials into a stirrer, adding alkyd resin accounting for 2.0 percent of the weight of the raw materials, and continuously stirring for 10 minutes;
3) then transferring the materials into an oven, and keeping the temperature at 50 ℃ for 3 hours for drying;
4) and sieving the dried powder to obtain a finished product.
The product of the invention is used for plasma spraying, certain current, voltage, main gas flow, auxiliary gas flow, feeding speed and spraying distance are adopted for spraying on carbon steel, the surface of the prepared coating has no cracks, and performance tests show that the microhardness of the coating is in the range of 1200-1350, and the coating has good bonding strength with a substrate and corrosion resistance. The hardness of the coating after heat treatment at 700 ℃ has no obvious change, which shows that the coating has good high-temperature hardness.
Example 2:
1) weighing 200 g of carbonyl nickel powder, 50 g of superfine aluminum powder and 750 g of silicon carbide, putting into a ball mill, carrying out mechanical ball milling and mixing for 30 minutes, and then separating the ball material by using a screen mesh;
2) putting the ball-milled raw materials into a stirrer, adding epoxy resin accounting for 3.5 percent of the weight of the raw materials, and continuously stirring for 20 minutes;
3) then transferring the materials into an oven, and keeping the temperature at 70 ℃ for 5 hours for drying;
4) and sieving the dried powder to obtain a finished product.
The product of the invention is used for plasma spraying, certain current, voltage, main gas flow, auxiliary gas flow, feeding speed and spraying distance are adopted for spraying on carbon steel, the surface of the prepared coating has no cracks, and performance tests show that the microhardness of the coating is in the range of 1000-1150, and the coating has good bonding strength with a substrate and corrosion resistance. The hardness of the coating after heat treatment at 700 ℃ has no obvious change, which shows that the coating has good high-temperature hardness.
Example 3:
1) weighing 150 g of carbonyl nickel powder, 37.5 g of superfine aluminum powder and 812.5 g of silicon carbide, putting into a ball mill, performing mechanical ball milling and mixing for 25 minutes, and then separating the ball material by using a screen;
2) putting the ball-milled raw materials into a stirrer, adding alkyd resin accounting for 3.0 percent of the weight of the raw materials, and continuously stirring for 15 minutes;
3) then transferring the materials into an oven, and keeping the temperature at 60 ℃ for 4 hours for drying;
4) and sieving the dried powder to obtain a finished product.
The product of the invention is used for plasma spraying, certain current, voltage, main gas flow, auxiliary gas flow, feeding speed and spraying distance are adopted for spraying on carbon steel, the surface of the prepared coating has no cracks, and performance tests show that the microhardness of the coating is in the range of 1100-1250, and the coating has good bonding strength with a substrate and corrosion resistance. The hardness of the coating after heat treatment at 700 ℃ has no obvious change, which shows that the coating has good high-temperature hardness.
Table 1, composition of the ion spray primer powder when performed according to examples 1-3, the following table is obtained:
in summary, the following steps: the nickel-aluminum coating is uniform, deposition of a silicon carbide coating is facilitated, the coating modification process is novel, the coating modification process can be applied to preparation of other coating type powder materials, the modified silicon carbide powder is high in deposition efficiency and excellent in coating performance, the modified silicon carbide powder for thermal spraying prepared by the method is uniform in coating and high in deposition efficiency, and a coating formed by spraying the modified silicon carbide powder prepared by the method is compact, high in hardness and good in corrosion resistance; meanwhile, the preparation method has the advantages of simple process, easy operation, low production cost, good product quality, large production capacity, economy, reliability, industrial popularization and the like, and can also be used for modifying other powders such as tungsten carbide, chromium boride, titanium diboride, boron carbide, titanium carbide, silicon nitride and the like.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a high bonding strength plasma spraying priming powder which characterized in that: the plasma spraying priming powder contains nickel, aluminum, silicon carbide and a binder, wherein: the weight of the adhesive accounts for 1.5 to 4.0 percent of the weight of the raw materials; the raw materials comprise by weight: 10 to 15.0 percent of silicon carbide, 2.5 to 5.0 percent of aluminum and the balance of nickel.
2. The high bond strength plasma spray primer powder of claim 1 wherein: the adhesive is one or a mixture of two or more of PVA, PVP, PA, PE, epoxy resin, alkyd resin or polysiloxane.
3. The high bond strength plasma spray primer powder of claim 1 wherein: the plasma spraying priming powder is in a core-shell structure.
4. A method for preparing the high bond strength plasma spray primer powder of claim 1, wherein: the method comprises the following steps:
s1, putting the raw materials of silicon carbide, aluminum powder and metal nickel powder into a ball mill at room temperature, carrying out mechanical ball milling and mixing for 20-40 minutes, and then separating the ball material by using a screen;
s2, putting the ball-milled raw materials into a stirrer, adding an adhesive accounting for 1.5-4.0% of the weight of the raw materials, and continuously stirring for 10-20 minutes;
s3, transferring the materials into an oven, and keeping the temperature at 40-70 ℃ for 1-5 hours for drying;
s4, sieving the dried materials according to the required granularity to obtain the product.
5. The method for preparing a high bond strength plasma spray primer powder according to claim 4, wherein: the raw materials are added in the mode of superfine silicon carbide powder, superfine aluminum powder and metal nickel powder.
6. The high bond strength plasma spray primer powder of claim 1 wherein: the granularity of the silicon carbide is 0.1-5 microns, the granularity of the superfine aluminum powder is 0.5-3 microns, and the granularity of the metal nickel powder is 38-100 microns.
7. The high bond strength plasma spray primer powder of claim 1 wherein: the plasma spraying priming powder comprises the following raw materials in parts by weight: 100 g of nickel powder, 25 g of superfine aluminum powder and 875 g of silicon carbide.
8. The high bond strength plasma spray primer powder of claim 1 wherein: the plasma spraying priming powder comprises the following raw materials in parts by weight: 200 g of nickel powder, 50 g of superfine aluminum powder and 750 g of silicon carbide.
9. The high bond strength plasma spray primer powder of claim 1 wherein: the plasma spraying priming powder comprises the following raw materials in parts by weight: 150 g of nickel powder, 37.5 g of superfine aluminum powder and 812.5 g of silicon carbide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011336175.1A CN112458391A (en) | 2020-11-24 | 2020-11-24 | High-bonding-strength plasma spraying priming powder and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011336175.1A CN112458391A (en) | 2020-11-24 | 2020-11-24 | High-bonding-strength plasma spraying priming powder and preparation method thereof |
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| CN112458391A true CN112458391A (en) | 2021-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788080A (en) * | 1987-04-27 | 1988-11-29 | Canadian Patents And Development Limited | Process and apparatus for coating particles with fine powder |
| US6106903A (en) * | 1999-03-01 | 2000-08-22 | Plasma Technology, Inc. | Thermal spray forming of molybdenum disilicide-silicon carbide composite material |
| CN1436623A (en) * | 2002-02-06 | 2003-08-20 | 北京矿冶研究总院 | Composite nickel-in-aluminum powder coated with ultramicro or nanometer aluminum powder |
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