CN112775857A - Preparation method of crystallized ceramic bond grinding tool - Google Patents
Preparation method of crystallized ceramic bond grinding tool Download PDFInfo
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- CN112775857A CN112775857A CN202011621244.3A CN202011621244A CN112775857A CN 112775857 A CN112775857 A CN 112775857A CN 202011621244 A CN202011621244 A CN 202011621244A CN 112775857 A CN112775857 A CN 112775857A
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- grinding tool
- ceramic bond
- mixing
- crystallized ceramic
- abrasive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a preparation method of a crystallized ceramic bond grinding tool, which comprises the following steps: mixing a certain proportion of SiO2、Al2O3、B2O3、ZrO2、TiO2、CaCO3、P2O5、Na20、Li2Mixing O, smelting, cooling, crushing and ball milling uniformly, adding the obtained mixed powder and a surfactant into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction, spray drying, and then carrying out microwave treatment to obtain a crystallized ceramic bonding agent; mixing an abrasive, a surfactant and water, and then carrying out high-energy ball milling to obtain a pretreated abrasive; uniformly mixing the pretreated abrasive, the crystallized ceramic bonding agent, the pore-forming agent and the temporary binder, pressing into a blank, and then carrying out heat preservation and sintering to obtain the ceramic material. The invention can effectively improve the wettability and the bonding force between the grinding material and the ceramic binder, obviously improve the strength of the grinding tool and improve the grinding toolThe service performance and the service life of the rubber belt are improved.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a preparation method of a crystallized ceramic bond grinding tool.
Background
The grinding tool which is made by using the superhard materials such as diamond, cubic boron nitride and the like as the grinding materials and bonding under the bonding action of the bonding agent has the advantages of good stability, long service life and the like, the grinding efficiency is very high, the surface of a ground workpiece is not easy to generate defects, the quality is good, the development requirement of processing automation can be met, and the grinding tool is widely applied to mechanical processing. The binding agent mainly comprises a metal binding agent, a resin binding agent, a ceramic binding agent and the like. The ceramic bonding agent has the action principle that crystal phase nucleation and crystallization occur in the sintering process, has good holding performance on abrasive particles, long service life and relatively strong rigidity and heat resistance, and is suitable for the field of high-precision processing. The strength is a key technical index of the grinding tool, and the performance of the ceramic bond and the preparation process of the ceramic bond grinding tool have a crucial effect on the strength of the grinding tool. Therefore, how to improve the performance of the ceramic bond and improve the preparation process of the ceramic bond grinding tool, thereby improving the strength of the grinding tool, becomes the current research focus.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of a crystallized ceramic bond grinding tool.
The invention provides a preparation method of a crystallized ceramic bond grinding tool, which comprises the following steps:
s1, weighing 40-50% SiO by mass percentage2、5-10％Al2O3、15-20％B2O3、2-5％ZrO2、3-5％TiO2、3-8％CaCO3、2-5％P2O5、3-10％Na20、2-7％Li2O, mixing, smelting, cooling, crushing and ball-milling uniformly to obtain mixed powder;
s2, adding the mixed powder and a surfactant into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 2-4h, spray drying, and then carrying out microwave treatment to obtain a crystallized ceramic bonding agent;
s3, mixing the abrasive, the surfactant and water according to the proportion of 1 g: (0.1-0.15) g: (2-3) adding the mL of the mixture into a planetary high-energy ball mill, performing high-energy ball milling for 15-20h at the rotation speed of 300-;
s4, uniformly mixing the pretreated abrasive, the crystallized ceramic bond, the pore-forming agent and the temporary binder, pressing into a blank, and then carrying out heat preservation and sintering to obtain the ceramic material.
Preferably, in the step S1, the melting temperature is 1300-.
Preferably, in the step S1, the particle size of the mixed powder is 150-200 meshes.
Preferably, in step S2, the ratio of the mixed powder, tetraethoxysilane, surfactant and solvent is (5-7) g: (1-2) mL: (0.5-1) g: (40-50) mL.
Preferably, in the step S2, the solvent is prepared from anhydrous ethanol, 20-25% by mass of an ammonia water solution, and water in a volume ratio of (20-30): (10-15): (3-5) mixing to obtain the product.
Preferably, in the step S2, the power of the microwave treatment is 500-.
Preferably, in step S3, the mass ratio of the abrasive to the steel ball is 1: (10-15).
Preferably, in the steps S2 and S3, the surfactant is CTAB; in step S3, the abrasive is diamond or hexagonal boron nitride.
Preferably, in the step S3, the particle size of the abrasive is 150-200 meshes.
Preferably, in step S4, the mass ratio of the pretreated abrasive, the crystallized ceramic bond, the pore-forming agent, and the temporary binder is 100: (40-50): (10-15): (5-10), wherein the pore-forming agent is NH4HCO3And the temporary binder is dextrin.
Preferably, in the step S4, the sintering temperature is 750-800 ℃, and the sintering time is 2-3 h.
A crystallized ceramic bond grinding tool is prepared by the preparation method.
The invention has the following beneficial effects:
the invention pretreats the grinding material by CTAB auxiliary high-energy ball milling, improves the fineness of the grinding material and simultaneously has a surfaceActive CTAB is combined on the surface of an abrasive, and CTAB modified nano SiO is loaded on the surface of a ceramic bond by sol-gel and spray drying2On one hand, CTAB is combined on the surface of the ceramic bond, so that the surface activity of the ceramic bond and the wettability between the ceramic bond and the abrasive are improved, the bond can be uniformly spread on the surface of the abrasive, the holding force of the bond on the abrasive and the filling property of the bond on gaps are improved, and the strength of the grinding tool is effectively improved; on the other hand, the nano-SiO is utilized2The high activity of the ceramic bond can be improved by combining with the microwave activation treatment, the interaction between the abrasive and the ceramic bond is enhanced, so that the binding force is improved, the strength of the grinding tool is further improved, the service performance of the grinding tool is improved, and the service life of the grinding tool is prolonged.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1 weighing 40% SiO2、10％Al2O3、20％B2O3、2％ZrO2、3％TiO2、5％CaCO3、5％P2O5、10％Na20、5％Li2O, smelting at 1300 ℃ after mixing, then cooling, crushing, and ball-milling to 150-200 meshes to obtain mixed powder;
s2, adding the mixed powder and CTAB into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 2-4h, spray drying, and then carrying out microwave treatment for 15min under the condition that the power is 500W to obtain the crystallized ceramic bonding agent, wherein the proportion of the mixed powder, tetraethoxysilane, CTAB and solvent is 5 g: 1mL of: 0.5 g: 40mL, wherein the solvent is prepared from absolute ethyl alcohol, 25% ammonia water solution by mass fraction and water according to the volume ratio of 20: 10: 3, mixing to obtain;
s3, mixing diamond with the particle size of 150-: 0.1 g: adding 2mL of the mixture into a planetary high-energy ball mill, using steel balls as ball milling media, performing high-energy ball milling for 20 hours at the rotating speed of 300r/min, and drying to obtain a pretreated grinding material, wherein the mass ratio of the grinding material to the steel balls is 1: 10;
s4, grinding the pretreated abrasive, bonding the crystallized ceramic and NH4HCO3And dextrin according to the mass ratio of 100: 40: 10: 5, uniformly mixing, pressing into a green body, and then carrying out heat preservation and sintering at 750 ℃ for 3 hours to obtain the ceramic material.
Example 2
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1, weighing 50% SiO2、5％Al2O3、15％B2O3、5％ZrO2、5％TiO2、8％CaCO3、2％P2O5、3％Na20、7％Li2O, mixing, smelting at 1350 ℃, cooling, crushing, and ball-milling to 150-200 meshes to obtain mixed powder;
s2, adding the mixed powder and CTAB into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 2-4h, spray drying, and then carrying out microwave treatment for 10min under the condition that the power is 1000W to obtain the crystallized ceramic bonding agent, wherein the proportion of the mixed powder, tetraethoxysilane, CTAB and solvent is 7 g: 2mL of: 1 g: 50mL, wherein the solvent is composed of absolute ethyl alcohol, 25% ammonia water solution by mass fraction and water according to a volume ratio of 30: 15: 5, mixing to obtain;
s3, mixing diamond with the particle size of 150-: 0.15 g: adding 3mL of the mixture into a planetary high-energy ball mill, using steel balls as ball milling media, performing high-energy ball milling for 15 hours at the rotating speed of 400r/min, and drying to obtain a pretreated grinding material, wherein the mass ratio of the grinding material to the steel balls is 1: 15;
s4, grinding the pretreated abrasive, bonding the crystallized ceramic and NH4HCO3And dextrin according to the mass ratio of 100: 50: 15: 10, uniformly mixing, pressing into a green body, and then carrying out heat preservation and sintering at 800 ℃ for 2 hours to obtain the ceramic material.
Example 3
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1, weighing 45% SiO by mass percentage2、8％Al2O3、17％B2O3、4％ZrO2、4％TiO2、3％CaCO3、4％P2O5、9％Na20、6％Li2O, smelting at 1300-;
s2, adding the mixed powder and CTAB into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 3 hours, spray-drying, and then carrying out microwave treatment for 12min under the condition that the power is 800W to obtain the crystallized ceramic binder, wherein the proportion of the mixed powder, tetraethoxysilane, CTAB and solvent is 6 g: 1.5 mL: 0.75 g: 45mL, wherein the solvent is prepared from absolute ethyl alcohol, 25% ammonia water solution by mass fraction and water according to a volume ratio of 24: 12: 4, mixing to obtain;
s3, mixing diamond with the particle size of 150-: 0.125 g: 2.5mL of the mixture is added into a planetary high-energy ball mill, steel balls are used as a ball milling medium, high-energy ball milling is carried out for 18 hours under the condition that the rotating speed is 350r/min, and the pretreated grinding material is obtained after drying, wherein the mass ratio of the grinding material to the steel balls is 1: 12;
s4, grinding the pretreated abrasive, bonding the crystallized ceramic and NH4HCO3And dextrin according to the mass ratio of 100: 45: 12.5: 7.5, evenly mixing, pressing into a green body, and then sintering at 780 ℃ for 2.5 hours in a heat preservation manner to obtain the ceramic.
Comparative example 1
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1, weighing 45% SiO by mass percentage2、8％Al2O3、17％B2O3、4％ZrO2、4％TiO2、3％CaCO3、4％P2O5、9％Na20、6％Li2O, mixing, smelting at the temperature of 1300-1350 ℃, cooling, crushing, and ball-milling to 200 meshes at the temperature of 150-1350 ℃ to obtain a crystallized ceramic bonding agent;
s2, mixing diamond with the particle size of 150-: 0.125 g: 2.5mL of the mixture is added into a planetary high-energy ball mill, steel balls are used as a ball milling medium, high-energy ball milling is carried out for 18 hours under the condition that the rotating speed is 350r/min, and the pretreated grinding material is obtained after drying, wherein the mass ratio of the grinding material to the steel balls is 1: 12;
s3, grinding the pretreated abrasive, bonding the crystallized ceramic and NH4HCO3And dextrin according to the mass ratio of 100: 45: 12.5: 7.5, evenly mixing, pressing into a green body, and then sintering at 780 ℃ for 2.5 hours in a heat preservation manner to obtain the ceramic.
Comparative example 2
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1, weighing 45% SiO by mass percentage2、8％Al2O3、17％B2O3、4％ZrO2、4％TiO2、3％CaCO3、4％P2O5、9％Na20、6％Li2O, smelting at 1300-;
s2, adding the mixed powder and CTAB into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 3 hours, spray-drying, and then carrying out microwave treatment for 12min under the condition that the power is 800W to obtain the crystallized ceramic binder, wherein the proportion of the mixed powder, tetraethoxysilane, CTAB and solvent is 6 g: 1.5 mL: 0.75 g: 45mL, wherein the solvent is prepared from absolute ethyl alcohol, 25% ammonia water solution by mass fraction and water according to a volume ratio of 24: 12: 4, mixing to obtain;
s3, mixing diamond with the grain size of 150-4HCO3And dextrin according to the mass ratio of 100: 45: 12.5: 7.5, evenly mixing, pressing into a green body, and then sintering at 780 ℃ for 2.5 hours in a heat preservation manner to obtain the ceramic.
Comparative example 3
A method for preparing a crystallized ceramic bond grinding tool comprises the following steps:
s1, weighing 45% SiO by mass percentage2、8％Al2O3、17％B2O3、4％ZrO2、4％TiO2、3％CaCO3、4％P2O5、9％Na20、6％Li2O, mixing, smelting at the temperature of 1300-1350 ℃, cooling, crushing, and ball-milling to 200 meshes at the temperature of 150-1350 ℃ to obtain a crystallized ceramic bonding agent;
s2, mixing diamond with the grain size of 150-4HCO3And dextrin according to the mass ratio of 100: 45: 12.5: 7.5, evenly mixing, pressing into a green body, and then sintering at 780 ℃ for 2.5 hours in a heat preservation manner to obtain the ceramic.
Test examples
The abrasive articles from example 3 and comparative examples 1-3 were tested for performance and the results are shown in table 1:
TABLE 1 grinding tool Performance test results
As can be seen from table 1, the abrasive tool prepared according to the present invention has significantly improved strength and superior performance and durability, compared to the abrasive tool prepared according to the conventional process of comparative example 1, in which only the abrasive is pretreated, comparative example 2, in which only the vitrified bond is modified, and comparative example 3.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A method for preparing a crystallized ceramic bond grinding tool is characterized by comprising the following steps:
s1, weighing 40-50% SiO by mass percentage2、5-10％Al2O3、15-20％B2O3、2-5％ZrO2、3-5％TiO2、3-8％CaCO3、2-5％P2O5、3-10％Na20、2-7％Li2O, mixing, smelting, cooling, crushing and ball-milling uniformly to obtain mixed powder;
s2, adding the mixed powder and a surfactant into a solvent for uniform dispersion, then adding tetraethoxysilane, stirring for reaction for 2-4h, spray drying, and then carrying out microwave treatment to obtain a crystallized ceramic bonding agent;
s3, mixing the abrasive, the surfactant and water according to the proportion of 1 g: (0.1-0.15) g: (2-3) adding the mL of the mixture into a planetary high-energy ball mill, performing high-energy ball milling for 15-20h at the rotation speed of 300-;
s4, uniformly mixing the pretreated abrasive, the crystallized ceramic bond, the pore-forming agent and the temporary binder, pressing into a blank, and then carrying out heat preservation and sintering to obtain the ceramic material.
2. The method as claimed in claim 1, wherein the melting temperature in step S1 is 1300-1350 ℃.
3. The method for preparing a crystallized ceramic bond grinding tool according to claim 1 or 2, wherein in the step S2, the ratio of the mixed powder, the tetraethoxysilane, the surfactant and the solvent is (5-7) g: (1-2) mL: (0.5-1) g: (40-50) mL.
4. The method for preparing the crystallized ceramic bond grinding tool according to any one of claims 1 to 3, wherein in the step S2, the solvent comprises absolute ethyl alcohol, 20 to 25 mass percent of ammonia water solution, and water in a volume ratio of (20 to 30): (10-15): (3-5) mixing to obtain the product.
5. The method as claimed in any one of claims 1 to 4, wherein the microwave treatment power is 500-1000W and the time is 10-15min in step S2.
6. The method for preparing the crystallized ceramic bond grinding tool according to any one of claims 1 to 5, wherein in the step S3, the mass ratio of the grinding material to the steel ball is 1: (10-15).
7. The method for preparing the crystallized ceramic bond grinding tool according to any one of claims 1 to 6, wherein in the steps S2 and S3, the surfactant is CTAB; in step S3, the abrasive is diamond or hexagonal boron nitride.
8. The method for preparing the crystallized ceramic bond grinding tool as claimed in any one of claims 1 to 7, wherein in the step S4, the mass ratio of the pretreated abrasive, the crystallized ceramic bond, the pore-forming agent and the temporary binder is 100: (40-50): (10-15): (5-10), wherein the pore-forming agent is NH4HCO3And the temporary binder is dextrin.
9. The method for preparing the crystallized ceramic bond grinding tool as claimed in any one of claims 1 to 8, wherein the sintering temperature is 750-800 ℃ and the sintering time is 2-3h in step S4.
10. A crystallized ceramic bond abrasive tool, characterized by being produced by the production method of any one of claims 1 to 9.
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| CN114986402A (en) * | 2022-06-29 | 2022-09-02 | 郑州磨料磨具磨削研究所有限公司 | High-performance low-temperature ceramic bond grinding wheel and preparation method thereof |
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