CN115971475B - Super wear-resistant nickel-based composite material containing diamond and preparation method thereof - Google Patents
Super wear-resistant nickel-based composite material containing diamond and preparation method thereof Download PDFInfo
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 130
- 239000010432 diamond Substances 0.000 title claims abstract description 130
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 79
- 238000007747 plating Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 17
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 14
- 239000011246 composite particle Substances 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims description 51
- 239000002245 particle Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 229910052804 chromium Inorganic materials 0.000 claims description 14
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 14
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 14
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 239000011258 core-shell material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 25
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- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 3
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- 238000010438 heat treatment Methods 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 6
- 229910000676 Si alloy Inorganic materials 0.000 description 6
- 238000004372 laser cladding Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005253 cladding Methods 0.000 description 5
- 238000009689 gas atomisation Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000002932 luster Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
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- 230000008023 solidification Effects 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
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- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000005552 hardfacing Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 238000005065 mining Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a diamond-containing super wear-resistant nickel-based composite material and a preparation method thereof, belonging to the technical field of hard material preparation. The diamond-containing super wear-resistant nickel-based composite material is a 80-100 mesh composite particle material which is formed by plating Cr diamond micro powder, ni-Cr-B-Si powder and an adhesive on the surface; the preparation method comprises the steps of plating Cr on the surface of diamond, proportioning, granulating and the like. The invention uses diamond as the abrasion-resistant/corrosion-resistant additive phase to be applied to the field of abrasion-resistant welding coating of equipment parts, can effectively improve the hardness of the coating, makes up the defects of the traditional hard surface materials, obviously improves the abrasion resistance and the service life of the equipment parts, greatly widens the application field of the diamond, and has great market application potential and development prospect.
Description
Technical Field
The invention belongs to the technical field of hard material preparation, and in particular relates to a super wear-resistant and corrosion-resistant hard coating prepared by taking gas atomization Ni-Cr-B-Si alloy powder as basic mother powder, taking Cr-plated diamond as super-hard additive phase to prepare wear-resistant and corrosion-resistant composite functional powder and adopting a laser cladding technology to melt the composite functional powder coated on the surface of a steel part.
Background
Surface wear is one of the important causes of damage and failure of mechanical parts, especially mechanical parts operating under severe working conditions, such as critical wear-resistant parts in the fields of mining equipment, petroleum drilling tools, geological exploration equipment, cement equipment, papermaking equipment and the like, and often cause operation failure and even failure and rejection due to part wear and failure. China is a large country of global manufacturing industry, and has more urgent demands for improving the surface wear resistance of mechanical parts. At present, the common technical methods for improving the wear resistance of mechanical parts mainly comprise the following steps: 1) The wear resistance of the component matrix is improved through the design and control of components and tissues; 2) A wear-resistant hard coating is coated on the surface of the component by adopting various technological methods such as surface overlaying and the like. The existing wear-resistant hardening regulation and control of the steel parts mainly depends on the technical means of forming hard carbide or adding hard ceramic particles in the material structure through metallurgical reaction to form hard wear-resistant phases in the parts or on the surfaces, so that the surface wear resistance of the parts can be improved to a great extent. However, with the continuous improvement of the industrial mechanization level, the requirements on the wear resistance and service life of the parts are also higher and higher, and the wear resistance of the existing materials still cannot meet the requirements of rapidly-developed mechanical engineering. Therefore, how to overcome the defects of the existing materials, develop a new wear-resistant coating material, and adopt a proper coating preparation technology to obtain a hard coating with super wear-resistant property on the surface of a part, thereby effectively improving the wear resistance of the part of the equipment, and being an important research subject in the field of material engineering. the surfacing is a widely applied workpiece surface hardening treatment technology, and has the advantages of short processing time, high bonding strength, high wear resistance, good impact resistance and the like. Hard materials such as hard-facing alloys, carbides, and ceramics are currently commonly used to enhance the wear resistance properties of the surface of the part. Ni-Cr-B-Si is a common metal material in the field of the prior welding coating, has the advantages of good self-fluxing property, low melting point, good slagging property and the like, and is widely applied to the preparation of the wear-resistant coating. However, compared with hard wear-resistant materials such as tungsten carbide, the surface hardness of the coating is still low, the wear resistance is insufficient, and the engineering operation requirements of wear-resistant parts cannot be well met. therefore, the addition of a hard reinforcing phase to the base metal powder material is an effective technical means for improving the wear resistance of the weld coating. The Chinese patent with publication number CN108342731A provides a preparation method of Ni-Cr-B-Si and titanium nitride wear-resistant coating, and the Ni-Cr-B-Si and titanium nitride cladding layer with high binding force and high wear-resistant property is prepared by adding titanium nitride powder into Ni-Cr-B-Si powder. It can be seen that adding a hard reinforcing phase to the alloy is an effective means of increasing the hardness of the coating. Diamond is the hardest known in nature at present, and its addition as a reinforcing phase to alloy powders can significantly improve the surface hardness of the weld coating and its wear resistance. Although diamond has been widely used in the field of machining tools, it has been rarely reported in the field of welding wear-resistant coatings. Literature "study of structure and performance of Ni60 coating with diamond particles added" (surface technique, 2016, vol.45 (9)) reports a method of preparing a hard coating by mixing diamond powder (180-200 mesh) with Ni60 metal powder, ball milling and granulating, and then using flame spraying technique, wherein although the existence of diamond can be detected in the spray welding coating, the bonding force between diamond and metal matrix is poor; meanwhile, the bare diamond in the air is extremely easy to oxidize, graphitize and thermally damage at high temperature, and is extremely easy to fall off and lose efficacy in the wearing process. In addition, literature "Quantitative investigation of thermal evolution and graphitisation of diamond abrasives in powder bed fusion-laser beam of metal-matrix diamond composites"(Virtual and Physical Prototyping 2023Vol.18Issue 1Pages 212-224) reports that after copper-tin alloy powder and diamond particles are mixed, a laser welding process is adopted to obtain a cladding layer containing diamond particles, and graphitization conditions of diamond in different welding temperature fields are discussed, but the problems that diamond is easy to oxidize/graphitize, the wettability of a metal matrix to diamond is poor, the metallurgical bonding between diamond and matrix metal is lacking, and the diamond cannot be truly applied to production practice still exist.
Disclosure of Invention
In order to overcome the defects in the prior art and meet the requirements of engineering machinery parts on ultra-high wear-resistant and corrosion-resistant performance, the invention provides a diamond-containing ultra-wear-resistant nickel-based composite material and a preparation method thereof.
The specific technical scheme of the invention is as follows:
A super wear-resistant nickel-based composite material containing diamond is a 80-100 mesh composite particle material which is formed by plating Cr diamond micro powder, ni-Cr-B-Si powder and an adhesive on the surface; wherein the mass ratio of the surface Cr-plated diamond micro powder to the Ni-Cr-B-Si powder is (5:95) - (90:10), and the adhesive accounts for 1-3% of the sum of the mass of the surface Cr-plated diamond micro powder and the mass of the Ni-Cr-B-Si powder.
Preferably, the surface Cr plating diamond micro powder is a composite functional particle with a core-shell structure, wherein the composite functional particle is obtained by plating Cr with the mass of 10-200% of the self-mass on the surface of the diamond micro powder with the granularity less than or equal to 75 mu m, and the particle structure is sequentially from inside to outside: diamond-chromium carbide-chromium.
Preferably, the Ni-Cr-B-Si powder is an aerosolized powder, wherein the mass composition of elements comprises 15% -20% of Cr, 3.0% -4.5% of B, 3.5% -5.5% of Si, 0.5% -1.1% of C, less than 5.0% of Fe and the balance of Ni.
The preparation method of the diamond-containing super wear-resistant nickel-based composite material comprises the following steps:
1) Plating Cr on the diamond surface: plating a layer of metal Cr on the surface of the diamond micro powder by using a chemical method, putting the diamond micro powder into a vacuum furnace, keeping the temperature above 750 ℃ at the vacuum degree of 10 -1～10-3 Torr, preserving the heat for 60-120 min, and naturally cooling to room temperature to obtain the diamond micro powder with the surface plated with Cr; the granularity of the diamond micro powder is less than or equal to 75 mu m, and the weight increase of the plating Cr is 10-200% of the weight of the diamond micro powder;
2) And (3) batching: mechanically mixing the gas atomized Ni-Cr-B-Si powder with the granularity of-150 meshes and the diamond micro powder plated with Cr on the surface in a three-dimensional mixer for 30-60 min to obtain mixed functional powder; wherein, the mass portion of the diamond micro powder plated on the surface is 5 to 90 percent, and the balance is Ni-Cr-B-Si powder;
3) Granulating: taking high-purity alcohol solution of polyvinylpyrrolidone (PVP) as a powder adhesive, wherein the dosage of the adhesive is 1-3% of the mass of the mixed functional powder, and preparing composite particle groups with the particle size of 80-100 meshes by adopting a spray granulation technology to obtain the diamond-containing super wear-resistant nickel-based composite material.
Preferably, the mass fraction of PVP in the adhesive used is 10% and the alcohol is 90%.
The beneficial effects are that:
1. The invention uses diamond powder which is coated with Cr on the surface and is subjected to heat treatment as a wear-resistant/corrosion-resistant functional phase, and performs functional combination with gas atomization Ni-Cr-B-Si alloy powder to obtain the super wear-resistant nickel-based composite material.
2. After the Cr-plated diamond is heat treated, a chemical bonding compound-chromium carbide nano layer can be formed at the diamond-metal interface to obtain the core-shell structure particles of diamond-chromium carbide-elemental chromium. Therefore, the plated Cr layer on the diamond surface can play a role of 'shell protection', effectively prevent the diamond from being oxidized/graphitized under the high-temperature welding thermal cycle condition, enable the diamond to keep the self structure to exert the effect, and realize the interface metallurgical bonding between the diamond and deposited metal by depending on the metal Cr on the outer layer of the shell, thereby thoroughly solving the common technical problem that the diamond is extremely easy to oxidize/graphitize in the welding heat source environment to cause structural denaturation and functional failure.
3. As a laser welding coating material, the diamond can obviously improve the hardness and the wear resistance of the Ni-Cr-B-Si base metal cladding layer when being used as a reinforcing phase, and meanwhile, the diamond has extremely strong acid/alkali corrosion resistance, so that the corrosion resistance of a deposited coating can be improved. Meanwhile, the fine-grain diamond can be used as a heterogeneous nucleation core in the laser welding pool during solidification, so that the solidification speed of the welding pool can be increased, weld grains can be refined, and the structural performance of a welding coating can be improved.
4. The diamond is used as a wear-resistant/corrosion-resistant additive phase to be applied to the field of wear-resistant welding coatings of equipment parts, so that the hardness of the coating can be effectively improved, the defects of the traditional hard surface materials are overcome, the wear resistance and the service life of the equipment parts are obviously improved, the application field of the diamond is greatly widened, and the diamond has huge market application potential and development prospect.
Drawings
Fig. 1 is a schematic view of the structure of diamond particles after Cr-plating heat treatment on the surface.
Fig. 2 is an SEM morphology of Cr-plated diamond particles on the surface.
Fig. 3 is an XRD pattern of Cr-plated diamond particles on the surface.
Fig. 4 is an XRD pattern of a composite functional powder laser cladding layer to which Cr-plated diamond is added.
Fig. 5 is an SEM image of a composite functional powder laser cladding layer to which Cr-plated diamond is added.
Detailed Description
The gas atomized Ni-Cr-B-Si alloy powder with the granularity of-150 meshes is used as a basic powder raw material, the powder is a well-known raw material and can be obtained on the market, and the weight ratio of the components is as follows: 15 to 20 percent of Cr, 3.0 to 4.5 percent of B, 3.5 to 5.5 percent of Si, 0.5 to 1.1 percent of C, less than 5.0 percent of Fe and the balance of Ni.
The diamond micro powder with the main granularity less than or equal to 75 mu m is adopted, the metal Cr is coated on the surface of the diamond by adopting the known chemical plating technology, and the coating weight increase is 10-200%. Heating the coated diamond to more than 700 ℃ in a vacuum furnace (the vacuum degree is 10 -1～10- 3 Torr), preserving heat for 60-120 min, and enabling metal Cr and diamond to react at an interface to generate a nano chromium carbide chemical bonding layer, so that the Cr-plated diamond is converted into a gradient functionalized composite particle with a core-shell structure of diamond-Cr 3C2/Cr7C3 -Cr, as shown in figure 1.
Example 1
Plating Cr on diamond: 1000g of diamond micropowder with the granularity of 10-20 mu m is weighed, the surface of the diamond micropowder is subjected to Cr plating treatment by adopting a known chemical plating method, the weight of Cr plating is 10% of that of the diamond micropowder, and the Cr plating diamond with the weight of 1100g is prepared. Repeatedly washing Cr-plated diamond with deionized water until the water solution is neutral, then placing the washed plated diamond into high-purity industrial alcohol for ultrasonic treatment for 10min, taking out the diamond, and naturally drying at room temperature.
And (3) heat treatment of Cr-plated diamond: and (3) heating the dried Cr-plated diamond to 780 ℃ (the vacuum degree is 10 -2 Torr) in a vacuum furnace, preserving heat for 60min, and then cooling to room temperature along with the furnace to prepare the diamond-chromium carbide-chromium composite diamond particles with core-shell structures, wherein the XRD pattern of the phase analysis is shown in figure 2, and the SEM morphology of the composite particles is shown in figure 3.
Functional material mixing: 10000g of commercial gas atomization Ni-Cr-B-Si alloy powder with granularity of-150 meshes is weighed and mixed with the Cr-plated diamond micro powder after vacuum heat treatment in a three-dimensional mixer filled with high-purity nitrogen for 40min to prepare mixed functional powder.
Granulating: taking high-purity alcohol solution (10% of PVP by mass) of polyvinylpyrrolidone (PVP) as a powder adhesive, wherein the dosage of the adhesive is 1% of the mass of the mixed functional powder, and preparing composite particle groups with the particle size of 80-100 meshes by adopting a spray granulation technology to obtain the diamond-containing super wear-resistant nickel-based composite material.
Packaging and sealing: the prepared diamond-nickel-based composite powder is filled into a plastic bag for vacuum packaging and preservation, and the weight of the diamond-nickel-based composite powder is 0.5 kg/bag.
Example 2
Plating Cr on diamond: weighing 500g of diamond micropowder with 20-30 mu m granularity, carrying out surface Cr plating treatment by adopting a known chemical plating method, wherein the weight of Cr plating is 30% of that of the diamond micropowder, and preparing the Cr plating diamond with the weight of 650 g. And repeatedly washing the Cr-plated diamond taken out of the plating solution by deionized water until the water solution is in a neutral state, then placing the washed plated diamond into high-purity industrial alcohol for ultrasonic treatment for 20min, taking out the diamond, and naturally drying at room temperature.
And (3) heat treatment of Cr-plated diamond: and (3) placing the dried Cr-plated diamond in a vacuum furnace (the vacuum degree is 10 -2 Torr), heating to 770 ℃, preserving heat for 70min, and then cooling to room temperature along with the furnace to prepare the diamond-chromium carbide-chromium composite diamond particles with the core-shell structure.
Functional material mixing: 2600g of commercial gas atomization Ni-Cr-B-Si alloy powder with granularity of-150 meshes is weighed and mixed with the Cr-plated diamond micro powder after vacuum heat treatment in a three-dimensional mixer filled with high-purity nitrogen for 60min, so as to prepare nickel-based mixed functional powder with the weight ratio of the Cr-plated diamond being 20 percent.
Granulating: taking high-purity alcohol solution (15% of PVP) of polyvinylpyrrolidone (PVP) as a powder adhesive, wherein the dosage of the adhesive is 2% of the mass of the mixed functional powder, and preparing composite particle groups with the particle size of 80-100 meshes by adopting a spray granulation technology to obtain the diamond-containing super wear-resistant nickel-based composite material.
Packaging and sealing: the prepared diamond-nickel-based composite powder is put into a plastic bag for vacuum packaging and preservation, and 1 kg/bag.
Example 3
Plating Cr on diamond: 2000g of diamond micropowder with the granularity of 40-50 mu m is weighed, the surface of the diamond micropowder is subjected to Cr plating treatment by adopting a known chemical plating method, the weight of the Cr plating is 100% of that of the diamond micropowder, and the Cr plating diamond with the weight of 4000g is prepared. Repeatedly washing Cr-plated diamond with deionized water until the water solution is neutral, then placing the washed plated diamond into high-purity industrial alcohol for ultrasonic treatment for 15min, taking out the diamond, and naturally drying at room temperature.
And (3) heat treatment of Cr-plated diamond: and (3) placing the dried Cr-plated diamond in a vacuum furnace (the vacuum degree is 10 -3 Torr), heating to 830 ℃, preserving heat for 80 minutes, and then cooling to room temperature along with the furnace to prepare the diamond-chromium carbide-chromium composite diamond particles with the core-shell structure.
Functional material mixing: 8000g of commercial gas atomization Ni-Cr-B-Si alloy powder with granularity of-150 meshes is weighed and mixed with the Cr-plated diamond micro powder after vacuum heat treatment in a three-dimensional mixer filled with high-purity nitrogen for 50min, so as to prepare mixed functional powder with the weight part of the Cr-plated diamond accounting for 50 percent.
Granulating: taking high-purity alcohol solution (10% of PVP by mass) of polyvinylpyrrolidone (PVP) as a powder adhesive, wherein the dosage of the adhesive is 3% of the mass of the mixed functional powder, and preparing composite particle groups with the particle size of 80-100 meshes by adopting a spray granulation technology to obtain the diamond-containing super wear-resistant nickel-based composite material.
Packaging and sealing: the prepared diamond-nickel-based composite powder is put into a plastic bag for vacuum packaging and preservation, and 1 kg/bag.
Example 4
A low-carbon steel sheet having a size of 200mm (length) ×40mm (width) ×3mm (thickness) was prepared, and subjected to surface blasting rust removal treatment until fresh metallic luster was exposed. 1 bag (500 g) of the mixed functional powder prepared in example 1 was taken, and an appropriate amount of the mixed powder was spread on the surface of the test piece of the low carbon steel sheet after the blast treatment, the spread powder size being 30mm (length) ×4mm (width) ×2mm (thickness). And (3) carrying out laser cladding treatment by adopting a CO 2 laser welding machine under the conditions of 1000W of laser power, 10mm/s of light spot transverse moving speed and 4mm of light spot diameter, and obtaining the diamond-nickel-based metal welding cladding coating with high hardness and high wear resistance on the surface of the steel plate.
XRD analysis: XRD phase structure analysis of laser clad welds (FIG. 4) shows that diamond maintains its own phase structure under the high temperature conditions of laser cladding without oxidation/graphitization losses.
SEM analysis: by SEM analysis of the laser clad weld fracture (fig. 5), it can be seen that the plated diamond is structurally complete and forms a good interface metallurgical bond with the surrounding metal substrate.
Hardness testing: the microhardness of the laser cladding weld seam is HV1181.927 measured by a (HV-1000 ZDT) hardness tester, which is improved by more than 3 times compared with the microhardness (HV 339.005) of the Ni-Cr-B-Si cladding layer without diamond obtained under the same welding condition.
Example 5
A low-carbon steel sheet having a size of 200mm (length) ×40mm (width) ×3mm (thickness) was prepared, and subjected to surface blasting rust removal treatment until fresh metallic luster was exposed. 1 bag (1000 g) of the mixed functional powder prepared in the example 2 is taken and placed in a material containing device of supersonic spraying equipment, and the prepared mixed functional powder is coated on the surface of a low-carbon steel plate by adopting a supersonic spraying process, wherein the spraying process parameters are as follows: air pressure 85PSI, propane pressure 70PSI, nitrogen pressure 40SLM, powder feeding speed 3r/min, spraying distance 230mm. The thickness of the spraying layer is 110 mu m, the hardness of the coating layer is HV587.16, and the micro-hardness (HV 281.65) of the Ni-Cr-B-Si spraying layer without diamond is improved by more than 2 times compared with that of the Ni-Cr-B-Si spraying layer without diamond obtained under the same spraying condition.
Example 6
A low-carbon steel sheet having a size of 200mm (length) ×40mm (width) ×3mm (thickness) was prepared, and subjected to surface blasting rust removal treatment until fresh metallic luster was exposed. 2 bags (2000 g in total) of the mixed functional powder prepared in the example 3 are weighed and placed in a storage tank of plasma spraying equipment, and the prepared mixed functional powder is coated on the surface of a low-carbon steel plate by adopting a plasma spraying technology process, wherein the spraying technology parameters are as follows: the current is 600A, the voltage is 50V, the main air pressure is 70PSI, the powder feeding air pressure is 40PSI, the spraying distance is 100mm, and the moving speed of the spray gun is 400mm/min. The thickness of the spraying layer is 370 mu m, the hardness of the coating layer is HV787.25, and the micro-hardness (HV 301.65) of the Ni-Cr-B-Si spraying layer without diamond is improved by 2.6 times compared with that of the Ni-Cr-B-Si spraying layer without diamond obtained under the same spraying condition.
Claims (3)
1. A diamond-containing super wear-resistant nickel-based composite material is an 80-100 mesh composite particle material which is formed by plating Cr diamond micro powder, ni-Cr-B-Si powder and an adhesive on the surface; the mass ratio of the surface Cr-plated diamond micro powder to the Ni-Cr-B-Si powder is (5:95) - (90:10), and the adhesive accounts for 1-3% of the sum of the mass of the surface Cr-plated diamond micro powder and the mass of the Ni-Cr-B-Si powder; the surface Cr plating diamond micro powder is a composite functional particle with a core-shell structure, which is obtained by plating Cr with the mass of 10-200% of the surface of the diamond micro powder with the granularity less than or equal to 75 mu m, and the particle structure is sequentially from inside to outside: diamond-chromium carbide-chromium; the diamond-containing super wear-resistant nickel-based composite material is prepared according to the following method:
1) Plating Cr on the diamond surface: plating a layer of metal Cr on the surface of the diamond micro powder by using a chemical method, putting the diamond micro powder into a vacuum furnace, keeping the temperature at more than 750 ℃ and 10 -1～10-3 Torr, and naturally cooling to room temperature after heat preservation of 60-120 min to obtain diamond micro powder with the surface plated with Cr; the granularity of the diamond micro powder is less than or equal to 75 mu m, and the weight increase of the plating Cr is 10-200% of the weight of the diamond micro powder;
2) And (3) batching: mechanically mixing the gas atomized Ni-Cr-B-Si powder with the granularity of-150 meshes with the diamond micro powder plated with Cr on the surface in a three-dimensional mixer for 30-60 min to obtain mixed functional powder; wherein, the mass portion of the diamond micro powder plated on the surface is 5 to 90 percent, and the balance is Ni-Cr-B-Si powder;
3) Granulating: and (3) taking a high-purity alcohol solution of polyvinylpyrrolidone as a powder adhesive, wherein the dosage of the adhesive is 1-3% of the mass of the mixed functional powder, and preparing composite particle groups with the particle size of 80-100 meshes by adopting a spray granulation technology to obtain the diamond-containing super wear-resistant nickel-based composite material.
2. The diamond-containing super wear-resistant nickel-base composite material according to claim 1, wherein the Ni-Cr-B-Si powder is an aerosolized powder, and the mass composition of the elements comprises 15% -20% of Cr, 3.0% -4.5% of B, 3.5% -5.5% of Si, 0.5% -1.1% of C, fe < 5.0% and the balance of Ni.
3. The diamond-containing super wear-resistant nickel-base composite material according to claim 1, wherein the weight portion of polyvinyl pyrrolidone in the adhesive is 10% and the weight portion of alcohol is 90%.
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| CN103788926A (en) * | 2014-02-26 | 2014-05-14 | 禹州市和汇超硬材料有限公司 | Diamond grinding material and application of diamond grinding material to manufacture or repair of excavator bucket teeth |
| CN111424270A (en) * | 2020-05-25 | 2020-07-17 | 上海交通大学 | Method for laser cladding of copper-based diamond particle reinforced composite coating on surface of copper alloy |
| CN114807724A (en) * | 2022-04-28 | 2022-07-29 | 北京工业大学 | Wear-resistant composite material prepared by laser 3D printing technology and method |
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| US5755299A (en) * | 1995-08-03 | 1998-05-26 | Dresser Industries, Inc. | Hardfacing with coated diamond particles |
| CN111136260B (en) * | 2018-11-02 | 2022-03-15 | 江苏锋泰工具有限公司 | Diamond coating process |
| CN109530177B (en) * | 2018-11-26 | 2021-08-31 | 吉林大学 | Gradient functionalized diamond composite material and preparation method and application thereof |
| CN111455205B (en) * | 2020-03-26 | 2021-03-12 | 陕西斯瑞新材料股份有限公司 | Preparation method of high-thermal-conductivity low-expansion Diamond-Cu composite material with sandwich structure |
| CN111992708B (en) * | 2020-08-30 | 2021-10-22 | 中南大学 | Method for preparing high-performance diamond/copper composite material |
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| CN103788926A (en) * | 2014-02-26 | 2014-05-14 | 禹州市和汇超硬材料有限公司 | Diamond grinding material and application of diamond grinding material to manufacture or repair of excavator bucket teeth |
| CN111424270A (en) * | 2020-05-25 | 2020-07-17 | 上海交通大学 | Method for laser cladding of copper-based diamond particle reinforced composite coating on surface of copper alloy |
| CN114807724A (en) * | 2022-04-28 | 2022-07-29 | 北京工业大学 | Wear-resistant composite material prepared by laser 3D printing technology and method |
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