CN114774068B - Wear-resistant perforating roller and processing method thereof - Google Patents
Wear-resistant perforating roller and processing method thereof Download PDFInfo
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- CN114774068B CN114774068B CN202210441163.8A CN202210441163A CN114774068B CN 114774068 B CN114774068 B CN 114774068B CN 202210441163 A CN202210441163 A CN 202210441163A CN 114774068 B CN114774068 B CN 114774068B
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- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 229910052582 BN Inorganic materials 0.000 claims abstract description 154
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 154
- 239000003292 glue Substances 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 239000004642 Polyimide Substances 0.000 claims abstract description 21
- 229920001721 polyimide Polymers 0.000 claims abstract description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 65
- 239000000463 material Substances 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 44
- 238000005406 washing Methods 0.000 claims description 37
- 238000001035 drying Methods 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 26
- 238000005245 sintering Methods 0.000 claims description 25
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 24
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 24
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000000498 ball milling Methods 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 16
- 241000252506 Characiformes Species 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 13
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 235000019441 ethanol Nutrition 0.000 claims description 11
- 239000006210 lotion Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000009210 therapy by ultrasound Methods 0.000 claims description 11
- 238000001291 vacuum drying Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 239000002103 nanocoating Substances 0.000 abstract description 3
- 229910052814 silicon oxide Inorganic materials 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 28
- 238000003756 stirring Methods 0.000 description 24
- 238000001132 ultrasonic dispersion Methods 0.000 description 21
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 239000002245 particle Substances 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 5
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000011258 core-shell material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000033444 hydroxylation Effects 0.000 description 2
- 238000005805 hydroxylation reaction Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J179/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09J161/00 - C09J177/00
- C09J179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09J179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
Abstract
The invention discloses a wear-resistant perforating roller and a processing method thereof; preparing a polycrystalline cubic boron nitride composite material by modifying cubic boron nitride; the mixed glue solution with the structure similar to that of the siloxane-polyimide copolymer is formed by coating the surface of the polycrystalline cubic boron nitride with the silicon oxide nano coating twice and polyimide, so that the mixed glue solution has better solubility and adhesiveness; the mixed glue solution can be directly smeared on the metal surface of the roller sleeve to form a wear-resistant coating at high temperature and high pressure, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of coating, in particular to a wear-resistant perforating roller and a processing method thereof.
Background
The perforating roller is used as an important deformation tool in seamless pipe steel production, the composition structure of the perforating roller is a roller shaft and a roller sleeve, and the roller shaft can be continuously used after the roller sleeve is scrapped, so that the cost is reduced. The service life of the roller sleeve can be effectively prolonged by adding a layer of wear-resistant coating outside the roller sleeve.
Cubic boron nitride is widely used as a material with high hardness, high temperature resistance, high thermal stability and chemical inertness for solid surface coating. However, the cubic boron nitride monocrystal has the defects of easy cleavage, anisotropy and the like, and the application field of the cubic boron nitride monocrystal is limited, so that the polycrystalline cubic boron nitride composite material is prepared to overcome the defects of the monocrystal. And because a layer of compact boron oxide film is arranged on the surface of the cubic boron nitride monocrystal to prevent direct bonding among cubic boron nitride grains, and polycrystalline cubic boron nitride directly bonded among the cubic boron nitride monocrystal is difficult to prepare, the cubic boron nitride and binder material are often mixed and sintered to form the polycrystalline cubic boron nitride composite material. However, cubic boron nitride is difficult to uniformly distribute with a binder material, so that poor interface bonding is caused, and the performance of the polycrystalline cubic boron nitride composite material is low.
Polyimide is used as a high-temperature resistant adhesive with excellent performance and is generally used as an adhesive for coating and metal, but has the defects of indissolvable property and poor adhesive capability, and needs to be modified.
It is therefore of great importance to produce a wear-resistant perforated roller.
Disclosure of Invention
The invention aims to provide a wear-resistant perforating roller and a processing method thereof, so as to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a processing method of a wear-resistant perforating roller comprises the following steps:
s1: after treating cubic boron nitride with piranha lotion, ultrasonically dispersing the cubic boron nitride in deionized water to prepare a suspension A, sequentially adding absolute ethyl alcohol, ammonia water and tetraethoxysilane for reaction, filtering, washing and drying to obtain modified cubic boron nitride;
s2: adding modified cubic boron nitride, titanium nitride powder and aluminum powder into a hard alloy ball milling tank, grinding by taking ethanol as a medium, vacuum drying, putting the material B into a vacuum furnace for heat treatment, and then adding the material B into a hinge hexahedral press for high-temperature ultrahigh-pressure sintering and heat preservation to obtain polycrystalline cubic boron nitride;
s3: after the polycrystalline cubic boron nitride is treated by the piranha washing liquid, the polycrystalline cubic boron nitride is dispersed in deionized water by ultrasonic, a suspension B is prepared by coarse preparation, absolute ethyl alcohol, ammonia water and tetraethoxysilane are sequentially added for reaction, and the modified polycrystalline cubic boron nitride is obtained by filtering, washing and drying;
s4: pretreating the modified polycrystalline cubic boron nitride, adding the pretreated polycrystalline cubic boron nitride into polyimide glue solution, and performing ultrasonic treatment to form mixed glue solution A;
s5: and (3) carrying out surface pretreatment on the perforated roll shaft sleeve substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roll shaft sleeve substrate sample, and heating, pressurizing and curing to obtain the wear-resistant perforated roll.
Further, in the step S1 and the step S3, every 1g of cubic boron nitride or polycrystalline cubic boron nitride, the adding amount of deionized water is 100mL, the adding amount of absolute ethyl alcohol is 500mL, the adding amount of ammonia water is 40mL, and the adding amount of tetraethoxysilane is 0.15-0.3 mL.
Further, the polycrystalline cubic boron nitride comprises the following components in percentage by mass: 75% of modified cubic boron nitride, 8-22% of titanium nitride powder and 3-17% of aluminum powder.
Further, in the step S2, the grinding and mixing time is 6-8 hours, the ball milling rotating speed is 300-450 r/min, and the ball material mass ratio is 3:1, the heat treatment temperature of a vacuum furnace is 800 ℃; the high-temperature sintering temperature is 1500 ℃ and the ultra-high pressure sintering pressure is 5.5GPa on the hinge hexahedral press, and the heat preservation time is 10-20 min.
Further, in the step S4, the pretreatment process is to add the silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mix, add modified polycrystalline cubic boron nitride, ultrasonically disperse for 1-2 h, and dry; wherein the addition amount of the silane coupling agent gamma-aminopropyl triethoxysilane is 4-5% of the addition amount of the modified polycrystalline cubic boron nitride.
Further, in the mixed glue solution A, the content of the modified polycrystalline cubic boron nitride is 1-2%, and the content of polyimide is 25-30%.
Further, the temperature rising rate is controlled, the temperature is increased to 180 ℃ at 1 ℃/min, and the temperature is kept for 1.0 to 1.5 hours; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h, wherein the curing pressure is 24.5-30.5 KPa.
Compared with the prior art, the invention has the following beneficial effects: the invention carries out hydroxylation treatment on the cubic boron nitride by using the piranha lotion, so that the cubic boron nitride has hydrophilic performance. Ammonia water is added to make the solution in alkaline condition, the hydrolysis reaction is weakened to enhance the polycondensation speed, through low reaction temperature and tetraethoxysilane concentration, under alkaline condition, silanol is polymerized on the surface of cubic boron nitride in a spontaneous nucleation mode by utilizing hydrophilicity, and the core-shell structure body with the surface uniformly coated with the silicon-oxygen coating is prepared to modify the cubic boron nitride. The monodisperse core-shell structure is beneficial to improving the combination of the binder material and the cubic boron nitride, solves the problems of uneven distribution and poor interface combination, and improves the performance of the polycrystalline cubic boron nitride material.
According to the invention, the polycrystalline cubic boron nitride material is prepared by adding titanium nitride powder, aluminum powder and modified cubic boron nitride, the aluminum is utilized to increase the liquid phase content in the system, so that the diffusion mobility of internal particles is enhanced, the pores in the internal structure are reduced, and the compactness of the polycrystalline cubic boron nitride material is improved; meanwhile, the titanium nitride has the characteristics of high hardness, high melting point, strong wear resistance and good chemical stability, and makes up for AlN and AlB generated in the reaction process of aluminum and cubic boron nitride 2 The problem of the reduction of the overall hardness of the polycrystalline cubic boron nitride material is solved, and the hardness and the wear resistance of the polycrystalline cubic boron nitride material are improved.
The invention carries out hydroxylation treatment on the polycrystalline cubic boron nitride through the piranha washing liquid, so that the polycrystalline cubic boron nitride has hydrophilic performance. Ammonia water is added to make the solution weaken hydrolysis reaction to enhance polycondensation speed under alkaline condition, and silanol is polymerized on the surface of cubic boron nitride in a spontaneous nucleation mode under alkaline condition by utilizing hydrophilicity through lower reaction temperature and concentration of tetraethoxysilane to prepare a core-shell structure with the surface uniformly coated with a silicon-oxygen coating. By introducing siloxane again and coating a layer of siloxane nano coating on the surface of the modified polycrystalline cubic boron nitride, the rigidity of the polyimide glue solution is reduced by the outermost layer of siloxane, the problem that the polyimide glue solution is easy to crack is solved, and the siloxane-like polyimide copolymer mixed glue solution is formed; the surface of the modified polycrystalline cubic boron nitride is adhered with siloxane molecules, so that the free volume of the polycrystalline cubic boron nitride molecules is greatly increased, the flow resistance is reduced, the diffusion and the action between the modified polycrystalline cubic boron nitride and a substrate are enhanced, and the adhesive force of the modified polycrystalline cubic boron nitride is improved. And the outermost silicon atoms in the mixed glue solution and the silicon atoms on the metal surface generate cohesive force between the atoms, and the cohesive force and the mutual attraction are generated to strengthen the adhesion. Compared with the traditional mode of firstly sizing and then cementing the body coating, the coating has stronger thermal stability and adhesive force; meanwhile, the coating can be directly smeared on the surface of a substrate to generate a wear-resistant coating, and the production process is simplified.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The surface pretreatment process of the perforated roller sleeve substrate sample in the following examples comprises: the surface was sanded with sandpaper to make the surface rough and uniform, the surface was wiped with acetone, deionized and washed, and dried in an oven at 80 ℃ for use.
Example 1
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 8% of titanium nitride powder, 17% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S3: adding 0.4g of mermaid washing liquid for polycrystalline cubic boron nitride into 40mL of deionized water after treatment, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified polycrystalline cubic boron nitride.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Example 2
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 12% of titanium nitride powder, 13% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S3: adding 0.4g of mermaid washing liquid for polycrystalline cubic boron nitride into 40mL of deionized water after treatment, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified polycrystalline cubic boron nitride.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Example 3
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 16% of titanium nitride powder, 9% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S3: adding 0.4g of mermaid washing liquid for polycrystalline cubic boron nitride into 40mL of deionized water after treatment, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified polycrystalline cubic boron nitride.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Example 4
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 20% of titanium nitride powder, 5% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S3: adding 0.4g of mermaid washing liquid for polycrystalline cubic boron nitride into 40mL of deionized water after treatment, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified polycrystalline cubic boron nitride.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Comparative example 1
S1: adding cubic boron nitride with the mass ratio of 75%, titanium nitride powder with the mass ratio of 16%, aluminum powder with the mass ratio of 9% and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling rotating speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out for 10 hours at 100 ℃; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S2: adding 0.4g of mermaid washing liquid for polycrystalline cubic boron nitride into 40mL of deionized water after the mermaid washing liquid is treated, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified polycrystalline cubic boron nitride.
S3: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S4: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Comparative example 2
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 16% of titanium nitride powder, 9% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the polycrystalline cubic boron nitride.
S3: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S4: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating a mixed glue solution A on the surface of the perforated roller substrate sample, coating a modified polycrystalline cubic boron nitride graph on the mixed glue solution A, standing for 40min, controlling the heating rate to 180 ℃ after the mixed glue solution A reacts, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Comparative example 3
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 25% of titanium nitride powder and ethanol into a hard alloy ball milling tank to grind and mix for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the modified polycrystalline cubic boron nitride.
S3: adding 0.4g of modified Polycrystalline Cubic Boron Nitride (PCBN) into 40mL of deionized water after the preparation, dispersing by ultrasonic, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified PCBN.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Comparative example 4
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 25% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; placing the material B into a vacuum furnace, performing heat treatment at 800 ℃ for 30min, adding the material B into a hinged hexahedral top press for high-temperature and ultrahigh-pressure sintering, the sintering temperature is 1500 ℃, the sintering pressure is 5.5GPa, and the heat preservation time is 15min, so as to obtain the modified polycrystalline cubic boron nitride.
S3: adding 0.4g of modified Polycrystalline Cubic Boron Nitride (PCBN) into 40mL of deionized water after the preparation, dispersing by ultrasonic, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified PCBN.
S4: adding a silane coupling agent gamma-aminopropyl triethoxysilane into absolute ethyl alcohol, uniformly mixing, adding modified polycrystalline cubic boron nitride, performing ultrasonic dispersion for 2 hours, drying, adding the mixture into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Comparative example 5
S1: concentrated sulfuric acid and hydrogen peroxide are mixed according to the volume ratio of 3:1 mixing to prepare a piranha lotion, adding cubic boron nitride into the mixture, stirring the mixture for 15 minutes, washing the mixture and drying the mixture. Adding 40mL of deionized water into 0.4g of pretreated cubic boron nitride particles, performing ultrasonic dispersion, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified cubic boron nitride.
S2: adding 75% of modified cubic boron nitride, 16% of titanium nitride powder, 9% of aluminum powder and ethanol into a hard alloy ball milling tank, grinding and mixing for 6 hours, wherein the ball milling speed is 350r/min, the ball material mass ratio is 3:1, and vacuum drying is carried out at 100 ℃ for 10 hours; and (3) putting the material B into a vacuum furnace, performing heat treatment for 30min at 800 ℃, adding the material B into a hinged hexahedral press, performing high-temperature and ultrahigh-pressure sintering at 1500 ℃, performing sintering pressure of 5.5GPa, and performing heat preservation for 15min to obtain the modified polycrystalline cubic boron nitride.
S3: adding 0.4g of modified Polycrystalline Cubic Boron Nitride (PCBN) into 40mL of deionized water after the preparation, dispersing by ultrasonic, sequentially adding 200mL of absolute ethyl alcohol, 16mL of ammonia water and 0.12mL of tetraethoxysilane, uniformly stirring, reacting at room temperature for 24h, filtering and washing after the reaction is finished, and drying at 100 ℃ for 12h to obtain the modified PCBN.
S4: adding the modified polycrystalline cubic boron nitride into polyimide glue solution, and performing ultrasonic treatment for 2 hours to form mixed glue solution A.
S5: carrying out surface pretreatment on a perforated roller substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roller substrate sample, controlling the heating rate, heating to 180 ℃ at 1 ℃/min, and preserving heat for 1.0-1.5 h; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h; the curing pressure was 25.5KPa, resulting in a wear resistant perforated roll.
And (3) testing: measuring the porosity by adopting a high-precision density balance; after the test sample is crushed by a testing machine, measuring the hardness by a Vickers microhardness meter, wherein the load is 50N, and the pressure maintaining time is 20s; the abrasion ratio was measured according to JB/T3235-1999 and experimental data were recorded as shown in Table 1.
Table 1 test data
| Porosity/% | hardness/GPa | Abrasion ratio | |
| Example 1 | 0.39 | 31.65 | 5875 |
| Example 2 | 0.40 | 32.47 | 7143 |
| Example 3 | 0.84 | 35.82 | 7500 |
| Example 4 | 1.05 | 33.55 | 4700 |
| Comparative example 1 | 0.85 | 30.65 | 4937 |
| Comparative example 2 | 0.84 | 31.21 | 4396 |
| Comparative example 3 | 1.21 | 34.3 | 5742 |
| Comparative example 4 | 0.31 | 29.69 | 5433 |
| Comparative example 5 | 0.90 | 35.72 | 7199 |
Conclusion: the non-modified cubic boron nitride in comparative example 1 leads to the performance reduction of the polycrystalline cubic boron nitride material, and the abrasion-resistant perforated roller has low hardness and small abrasion ratio, because the cubic boron nitride coated by the silica coating has a monodisperse core-shell structure, the combination of the binder material and the cubic boron nitride is favorably improved, the conditions of uneven distribution and poor interface combination are solved, and the performance of the polycrystalline cubic boron nitride material is improved.
The polycrystalline cubic boron nitride in comparative example 2 is unmodified, so that the abrasion-resistant perforation rolling hardness is low, and the abrasion ratio is small, because the surface of the modified polycrystalline cubic boron nitride is coated with a layer of silicon oxide nano coating, the rigidity of polyimide glue solution is reduced, the problem that the polyimide glue solution is easy to crack is solved, siloxane molecules are attached to the surface of the modified polycrystalline cubic boron nitride, the free volume of the polycrystalline cubic boron nitride molecules is greatly increased, the flow resistance is reduced, the diffusion and the action between the modified polycrystalline cubic boron nitride and a substrate are enhanced, and the adhesive force of the modified polycrystalline cubic boron nitride is improved. And the outermost silicon atoms in the mixed glue solution and the silicon atoms on the metal surface generate cohesive force between the atoms, and the cohesive force and the mutual attraction are generated to strengthen the adhesion. Compared with the traditional mode of firstly sizing and then cementation, the coating has stronger thermal stability and adhesive force.
Aluminum powder is not added into the polycrystalline cubic boron nitride in the comparative example 3, so that the porosity is too large, the hardness of the wear-resistant perforated roller is low, and the abrasion ratio is small, because the aluminum increases the liquid phase content in the system, the diffusion fluidity of internal particles is enhanced, the pores in the internal structure are reduced, and the compactness of the polycrystalline cubic boron nitride material is improved.
In comparative example 4, titanium nitride powder was not added to the polycrystalline cubic boron nitride, resulting in a reduction in the overall hardness of the polycrystalline cubic boron nitride material, and the wear-resistant perforated roller had a low hardness and a low wear ratio due to the formation of AlN and AlB during the reaction of aluminum with cubic boron nitride 2 The two substances have low hardness, and the titanium nitride has the characteristics of high hardness, high melting point, high wear resistance and good chemical stability, and can improve the hardness and the wear resistance of the polycrystalline cubic boron nitride material.
In the comparative example 5, the modified polycrystalline cubic boron nitride is not coated by the secondary silica coating, so that the flow resistance of the modified polycrystalline cubic boron nitride in the prepared glue solution is increased, the diffusion and the action between the modified polycrystalline cubic boron nitride and a substrate are reduced, and the adhesive force is reduced; the wear-resistant coating of the wear-resistant perforating roller has poor adhesiveness and small abrasion ratio.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A processing method of a wear-resistant perforating roller is characterized in that:
s1: after treating cubic boron nitride with piranha lotion, ultrasonically dispersing the cubic boron nitride in deionized water to prepare a suspension A, sequentially adding absolute ethyl alcohol, ammonia water and tetraethoxysilane for reaction, filtering, washing and drying to obtain modified cubic boron nitride;
s2: adding modified cubic boron nitride, titanium nitride powder and aluminum powder into a hard alloy ball milling tank, grinding by taking ethanol as a medium, vacuum drying, putting the material B into a vacuum furnace for heat treatment, and then adding the material B into a hinge hexahedral press for high-temperature ultrahigh-pressure sintering and heat preservation to obtain polycrystalline cubic boron nitride;
s3: after the polycrystalline cubic boron nitride is treated by the piranha washing liquid, the polycrystalline cubic boron nitride is dispersed in deionized water by ultrasonic, a suspension B is prepared by coarse preparation, absolute ethyl alcohol, ammonia water and tetraethoxysilane are sequentially added for reaction, and the modified polycrystalline cubic boron nitride is obtained by filtering, washing and drying;
s4: pretreating the modified polycrystalline cubic boron nitride, adding the pretreated polycrystalline cubic boron nitride into polyimide glue solution, and performing ultrasonic treatment to form mixed glue solution A;
s5: and (3) carrying out surface pretreatment on the perforated roll shaft sleeve substrate sample, uniformly coating the mixed glue solution A on the surface of the perforated roll shaft sleeve substrate sample, and heating, pressurizing and curing to obtain the wear-resistant perforated roll.
2. A method of machining a wear resistant perforated roll according to claim 1, wherein: in the step S1 and the step S3, every 1g of cubic boron nitride or polycrystalline cubic boron nitride, the adding amount of deionized water is 100mL, the adding amount of absolute ethyl alcohol is 500mL, the adding amount of ammonia water is 40mL, and the adding amount of tetraethoxysilane is 0.15-0.3 mL.
3. A method of machining a wear resistant perforated roll according to claim 1, wherein: the polycrystalline cubic boron nitride comprises the following components in percentage by mass: 75% of modified cubic boron nitride, 8-22% of titanium nitride powder and 3-17% of aluminum powder.
4. A method of machining a wear resistant perforated roll according to claim 1, wherein: in the step S2, the grinding and mixing time is 6-8 h, the ball milling rotating speed is 300-450 r/min, and the ball material mass ratio is 3:1, the heat treatment temperature of a vacuum furnace is 800 ℃; the high-temperature sintering temperature is 1500 ℃ and the ultra-high pressure sintering pressure is 5.5GPa on the hinge hexahedral press, and the heat preservation time is 10-20 min.
5. A method of machining a wear resistant perforated roll according to claim 1, wherein: in the step S4, the pretreatment process is to add the silane coupling agent gamma-aminopropyl triethoxy silane into absolute ethyl alcohol, uniformly mix and add modified polycrystalline cubic boron nitride, ultrasonically disperse for 1-2 h and dry; wherein the addition amount of the silane coupling agent gamma-aminopropyl triethoxysilane is 4-5% of the addition amount of the modified polycrystalline cubic boron nitride.
6. A method of machining a wear resistant perforated roll according to claim 1, wherein: in the mixed glue solution A, the content of the modified polycrystalline cubic boron nitride is 1-2%, and the content of polyimide is 25-30%.
7. A method of machining a wear resistant perforated roll according to claim 1, wherein: in the heating and pressurizing curing process, the heating rate is controlled, the temperature is increased to 180 ℃ at 1 ℃/min, and the temperature is kept for 1.0 to 1.5 hours; raising the temperature to 250 ℃ at 1.5 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 280 ℃ at 2 ℃/min, and preserving the temperature for 1.5-2 h.
8. A wear resistant perforated roller prepared by the method of processing a wear resistant perforated roller according to any one of claims 1 to 7.
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