CN108818331B - Bronze-based CBN grinding wheel and preparation method thereof - Google Patents

Bronze-based CBN grinding wheel and preparation method thereof Download PDF

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Publication number
CN108818331B
CN108818331B CN201810749041.9A CN201810749041A CN108818331B CN 108818331 B CN108818331 B CN 108818331B CN 201810749041 A CN201810749041 A CN 201810749041A CN 108818331 B CN108818331 B CN 108818331B
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abrasive
cbn
mixture
grinding wheel
powder
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CN108818331A (en
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王聪
范永刚
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Northeastern University China
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Northeastern University China
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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
    • B24D3/06—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 metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • 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
    • 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
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • 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
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation

Abstract

A bronze-based CBN grinding wheel and a preparation method thereof, the grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive binder, and the abrasive ring is prepared from a CBN abrasive, a metal bond and an auxiliary binder; the metal bonding agent contains Cu60Sn40 powder and Ti powder; the grinding material ring comprises the following components: CBN abrasive, metal bond and pores; the preparation method comprises the following steps: 1) uniformly mixing the CBN abrasive, Cu60Sn40 powder and Ti powder to obtain a mixture A; 2) uniformly mixing the auxiliary binder with the mixture A to prepare a mixture B; 3) drying the mixture B; 4) sieving the dried mixture B; 5) cold-pressing and molding the sieved mixture B; 6) sintering the abrasive ring green body in an inert gas atmosphere and then cooling to prepare an abrasive ring green body; 7) and (3) bonding the grinding material ring blank with the steel core by using a resin adhesive binder to obtain the bronze-based CBN grinding wheel.

Description

Bronze-based CBN grinding wheel and preparation method thereof
Technical Field
The invention relates to the field of superhard abrasives, in particular to a bronze-based CBN grinding wheel and a preparation method thereof.
Background
With the development of modern machining toward high precision, high speed, hard machining, dry machining (without coolant), cost reduction, etc., a relatively high demand is placed on the performance of the grinding tool. The traditional silicon carbide and corundum common abrasive die can not completely meet the current high-speed, high-efficiency and high-precision grinding requirements, so that the development of various superhard grinding materials with excellent wear resistance and capable of being stably processed for a long time is a necessary development trend. Currently used superhard grinding materials include both Cubic Boron Nitride (CBN) and diamond abrasives. Although the hardness of the cubic boron nitride abrasive is lower than that of diamond, the cubic boron nitride abrasive is still far higher than that of corundum and silicon carbide materials, and the thermal stability of the abrasive is superior to that of diamond, so that the abrasive has good wear resistance and corrosion resistance. The cubic boron nitride grinding wheel not only can be applied to high-strength and high-toughness materials which are difficult to process, such as titanium alloy, nickel-based high-temperature alloy and the like of parts (such as discs, shafts and the like) of an aero-engine in high-efficiency and precise grinding, but also can be widely applied to iron-based alloy (ferrous metal) materials, such as hardened steel, high-speed tool steel, bearing steel, stainless steel, die steel, heat-resistant steel, advanced high-strength steel, high-chromium cast iron and the like, without reacting with iron and iron alloy. The performances of the CBN super-hard grinding tool (grinding wheel), such as grinding efficiency, machining precision, wear resistance and the like, are key problems in high-speed precision grinding machining.
The binder used to consolidate the abrasive particles in the superabrasive tool is a critical factor affecting the performance of the superabrasive tool. The traditional superhard grinding tool (grinding wheel) is mostly manufactured by adopting the processes of resin, ceramic, metal bond sintering, electroplating and the like, and has the problems that single crystal particles are only embedded in the bonding agent and the electroplated layer mechanically and the acting force between the single crystal particles and the bonding agent and the electroplated layer is weak. In particular, although the resin bonding agent is easy to process and trim, the resin bonding agent has poor heat resistance, low bonding strength and serious falling of the abrasive, which seriously affects the efficiency; the ceramic bond is relatively easy to trim, has high use temperature, but has high brittleness, poor impact toughness and fatigue resistance, is easy to crack and is difficult to be used for high-speed processing. Although the sintering of the metal bond has strong heat resistance, generally, chemical metallurgical bonding cannot be generated between the bond and the abrasive grains, so that the abrasive grains are only embedded in the bond by mechanical embedding, and the holding force is limited; the abrasive particles in metal plating are also only mechanically embedded. Therefore, the grinding wheel is easy to lose effectiveness as a whole due to the fact that the grinding material is in particle fall off and the coating is stripped in a flaky mode, and the condition is particularly obvious when the material which is difficult to process is ground efficiently; in addition, the coating is thick, the exposed height of the abrasive is low, the chip containing space is small, and the failure is easily caused by the adhesion and the blockage of chips during grinding.
Disclosure of Invention
In order to solve the problems, the invention provides a bronze-based CBN grinding wheel and a preparation method thereof, wherein the bronze-based CBN grinding wheel can bear larger load in a high-speed grinding process, and has excellent impact resistance and good shape retention property, and the specific technical scheme is as follows:
the invention relates to a bronze-based CBN grinding wheel, which comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 35-60%, metal binder: 40-60%, auxiliary binder: 10-30% of CBN abrasive, metal bond and auxiliary binder, wherein the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100%; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 40-70%, Ti powder: 35-65% of Cu60Sn40 powder and 100% of Ti powder in percentage by mass; the grinding ring comprises the following components in percentage by volume: 15-50% of CBN abrasive, 10-45% of metal bond and 20-45% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%.
The particle size ranges of the Cu60Sn40 powder and the Ti powder are both 30-350 mu m.
The auxiliary binder is acrylic emulsion.
The invention discloses a preparation method of a bronze-based CBN grinding wheel, which comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder according to the component proportion of the bronze-based CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
uniformly mixing the auxiliary binder and the mixture A according to the component proportion of the bronze-based CBN grinding wheel to prepare a mixture B;
and step 3, drying:
heating the mixture B to 50-150 ℃, drying to a mass ratio, wherein the dried mixture B: the mixture B before drying is 80-95%;
and 4, sieving:
sieving the dried mixture B, wherein the sieving mesh number is 20-300 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and carrying out cold press molding under the pressure of 40-200 MPa for 20-120 min to obtain an abrasive ring green body;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating the abrasive ring green body from room temperature to a sintering temperature of 800-1050 ℃ at a heating rate of 3-10 ℃/min, and sintering for 10-150 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.
The bronze-based CBN grinding wheel and the preparation method thereof are characterized in that:
in the step 1, the mixing time is 2-8 h.
In the step 2, the materials are uniformly mixed by stirring for 1-6 h.
In the step 3, the drying and heat preservation time is 1-3 h.
And in the step 4, sieving for 2-8 times.
In the step 5, a hydraulic press is adopted for cold press molding.
In the step 6, the inert gas is argon.
Compared with the prior art, the bronze-based CBN grinding wheel and the preparation method thereof have the beneficial effects that:
(1) the bronze-based CBN grinding wheel has excellent heat conductivity, and can quickly reduce the temperature of the surface of a grinding workpiece, thereby reducing power loss and improving grinding speed; the auxiliary binder in the formula is beneficial to the formation of product pores, the space for containing the fallen abrasive particles can be effectively enlarged, the abrasive is more fully utilized, and meanwhile, the metal bond has strong holding force; the grinding wheel has the characteristics of high grinding efficiency, low grinding temperature, low power loss, good processing precision, long service life and the like.
(2) The preparation method provided by the invention has the advantages that the sintering time is short, the characteristics of the grinding material are not damaged, and the sintering temperature, the metal bonding agent, the porosity and the time are controlled, so that the grinding wheel has good heat conductivity and larger space for accommodating metal chips and the grinding material in the working process, is not easy to block in the high-speed grinding process, is sharp in grinding, has high grinding precision and has self-sharpening property.
Detailed Description
The present invention will be further described with reference to specific examples, but the present invention is not limited to these examples.
In the following examples, the noble gas is argon.
Example 1
The bronze-based CBN grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 40%, metal binder: 45%, auxiliary binder: 15 percent, wherein the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100 percent; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 50%, Ti powder: 50 percent, and the sum of the mass percentages of the Cu60Sn40 powder and the Ti powder is 100 percent; the grinding ring comprises the following components in percentage by volume: 35% of CBN abrasive, 38% of metal bond and 27% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%; the particle sizes of the CBN abrasive, the Cu60Sn40 powder and the Ti powder are all 50 micrometers; the auxiliary binder is acrylic emulsion.
The preparation method of the CBN grinding wheel comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder for 1h according to the component proportion of a CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
according to the component proportion of the CBN grinding wheel, the auxiliary binder is mixed with the mixture A and is uniformly stirred and mixed for 1h to prepare a mixture B;
and step 3, drying:
heating the mixture B to 75 ℃, drying and preserving heat for 1h, wherein the dried mixture B is prepared by the following steps: the mixture B before drying is 92%;
and 4, sieving:
sieving the dried mixture B for 3 times with a sieve mesh number of 100 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and performing cold press molding by using a hydraulic machine under the pressure of 75MPa for 40min to obtain a green grinding material ring;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating from room temperature to 960 ℃ at a heating rate of 10 ℃/min, and sintering for 30 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.
Example 2
The bronze-based CBN grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 40%, metal binder: 40%, auxiliary binder: 20 percent, and the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100 percent; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 55%, Ti powder: 45 percent, and the sum of the mass percentages of the Cu60Sn40 powder and the Ti powder is 100 percent; the grinding ring comprises the following components in percentage by volume: 37% of CBN abrasive, 32% of metal bond and 31% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%; the particle sizes of the CBN abrasive, the Cu60Sn40 powder and the Ti powder are all 100 mu m; the auxiliary binder is acrylic emulsion.
The preparation method of the CBN grinding wheel comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder for 1h according to the component proportion of a CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
according to the component proportion of the CBN grinding wheel, the auxiliary binder is mixed with the mixture A and is uniformly stirred and mixed for 1h to prepare a mixture B;
and step 3, drying:
heating the mixture B to 75 ℃, drying and preserving heat for 1h, wherein the dried mixture B is prepared by the following steps: the mixture B before drying is 92%;
and 4, sieving:
sieving the dried mixture B for 3 times with a sieve mesh number of 100 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and performing cold press molding by using a hydraulic machine under the pressure of 75MPa for 40min to obtain a green grinding material ring;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating from room temperature to 960 ℃ at a heating rate of 10 ℃/min, and sintering for 30 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.
Example 3
The bronze-based CBN grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 35%, metal binder: 42%, auxiliary binder: 23 percent, wherein the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100 percent; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 60%, Ti powder: 40 percent, and the sum of the mass percentages of the Cu60Sn40 powder and the Ti powder is 100 percent; the grinding ring comprises the following components in percentage by volume: 35% of CBN abrasive, 30% of metal bond and 35% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%; the particle sizes of the CBN abrasive, the Cu60Sn40 powder and the Ti powder are all 150 micrometers; the auxiliary binder is acrylic emulsion.
The preparation method of the CBN grinding wheel comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder for 1h according to the component proportion of a CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
according to the component proportion of the CBN grinding wheel, the auxiliary binder is mixed with the mixture A and is uniformly stirred and mixed for 1h to prepare a mixture B;
and step 3, drying:
heating the mixture B to 75 ℃, drying and preserving heat for 1h, wherein the dried mixture B is prepared by the following steps: the mixture B before drying is 92%;
and 4, sieving:
sieving the dried mixture B for 3 times with a sieve mesh number of 100 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and performing cold press molding by using a hydraulic machine under the pressure of 75MPa for 40min to obtain a green grinding material ring;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating from room temperature to 960 ℃ at a heating rate of 10 ℃/min, and sintering for 30 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.
Example 4
The bronze-based CBN grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 35%, metal binder: 40%, auxiliary binder: 25 percent, wherein the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100 percent; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 60%, Ti powder: 40 percent, and the sum of the mass percentages of the Cu60Sn40 powder and the Ti powder is 100 percent; the grinding ring comprises the following components in percentage by volume: 35% of CBN abrasive, 28% of metal bond and 37% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%; the particle sizes of the CBN abrasive, the Cu60Sn40 powder and the Ti powder are all 200 mu m; the auxiliary binder is acrylic emulsion.
The preparation method of the CBN grinding wheel comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder for 1h according to the component proportion of a CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
according to the component proportion of the CBN grinding wheel, the auxiliary binder is mixed with the mixture A and is uniformly stirred and mixed for 1h to prepare a mixture B;
and step 3, drying:
heating the mixture B to 75 ℃, drying and preserving heat for 1h, wherein the dried mixture B is prepared by the following steps: the mixture B before drying is 92%;
and 4, sieving:
sieving the dried mixture B for 3 times with a sieve mesh number of 100 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and performing cold press molding by using a hydraulic machine under the pressure of 75MPa for 40min to obtain a green grinding material ring;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating from room temperature to 960 ℃ at a heating rate of 10 ℃/min, and sintering for 30 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.
Example 5
The bronze-based CBN grinding wheel comprises a steel core and an abrasive ring, wherein the steel core and the abrasive ring are combined through a resin adhesive, and the abrasive ring is prepared from the following components in percentage by mass: CBN abrasive: 45%, metal binder: 45%, auxiliary binder: 10 percent, and the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100 percent; the metal bonding agent comprises the following components in percentage by mass: cu60Sn40 powder: 50%, Ti powder: 50 percent, and the sum of the mass percentages of the Cu60Sn40 powder and the Ti powder is 100 percent; the grinding ring comprises the following components in percentage by volume: the composite abrasive material comprises 42% of CBN abrasive material, 38% of metal bond and 24% of pores, wherein the sum of the volume percentages of the CBN abrasive material, the metal bond and the pores is 100%; the particle sizes of the CBN abrasive, the Cu60Sn40 powder and the Ti powder are all 200 mu m; the auxiliary binder is acrylic emulsion.
The preparation method of the CBN grinding wheel comprises the following steps:
step 1, mixing materials:
uniformly mixing CBN grinding materials, Cu60Sn40 powder and Ti powder for 1h according to the component proportion of a CBN grinding wheel to prepare a mixture A;
step 2, mixing materials:
according to the component proportion of the CBN grinding wheel, the auxiliary binder is mixed with the mixture A and is uniformly stirred and mixed for 1h to prepare a mixture B;
and step 3, drying:
heating the mixture B to 75 ℃, drying and preserving heat for 1h, wherein the dried mixture B is prepared by the following steps: the mixture B before drying is 92%;
and 4, sieving:
sieving the dried mixture B for 3 times with a sieve mesh number of 100 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and performing cold press molding by using a hydraulic machine under the pressure of 75MPa for 40min to obtain a green grinding material ring;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating from room temperature to 960 ℃ at a heating rate of 10 ℃/min, and sintering for 30 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
and (3) bonding the grinding material ring blank body with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain the bronze-based CBN grinding wheel.

Claims (4)

1. The preparation method of the bronze-based CBN grinding wheel is characterized by comprising the following steps of:
step 1, mixing materials:
uniformly mixing 35-45% by mass of CBN grinding materials and 40-45% by mass of metal bonding agents according to the component proportion of the bronze-based CBN grinding wheel to prepare a mixture A;
the metal bonding agent comprises the following components in percentage by mass: cu60Sn40Powder: 50-60%, Ti powder: 40 to 50% of Cu60Sn40The sum of the mass percentages of the powder and the Ti powder is 100 percent;
the Cu60Sn40The particle size ranges of the powder and the Ti powder are both 200-350 mu m;
step 2, mixing materials:
according to the component proportion of the bronze-based CBN grinding wheel, 15-30% of auxiliary binder in percentage by mass is uniformly mixed with the mixture A by stirring for 1-6 hours to prepare a mixture B;
the sum of the mass percentages of the CBN abrasive, the metal bond and the auxiliary binder is 100%;
and step 3, drying:
heating the mixture B to 50-75 ℃, drying to a state that the dried mixture B is: the mixture B = 80-95% before drying;
and 4, sieving:
sieving the dried mixture B, wherein the sieving mesh number is 20-300 meshes;
step 5, forming:
uniformly putting the sieved mixture B into a mold, and carrying out cold press molding under the pressure of 75MPa for 20-120 min to obtain an abrasive ring green body;
and 6, sintering:
(1) sintering the abrasive ring green body in an inert gas atmosphere, heating the abrasive ring green body from room temperature to a sintering temperature of 960 ℃ at a heating rate of 3-10 ℃/min, and sintering for 10-150 min;
(2) cooling to less than or equal to 40 ℃ after sintering, and discharging to obtain an abrasive ring blank;
step 7, bonding:
bonding the grinding material ring blank with the steel core by using a resin adhesive binder, removing burrs, and finishing and forming to obtain a bronze-based CBN grinding wheel; the grinding ring of the bronze-based CBN grinding wheel comprises the following components in percentage by volume: 15-42% of CBN abrasive, 10-38% of metal bond and 20-37% of pores, wherein the sum of the volume percentages of the CBN abrasive, the metal bond and the pores is 100%.
2. The method for manufacturing bronze-based CBN grinding wheel as claimed in claim 1, wherein the auxiliary binder is acrylic emulsion.
3. The method for preparing the bronze-based CBN grinding wheel according to claim 1, wherein in the step 1, the mixing time is 2-8 hours.
4. The method for preparing the bronze-based CBN grinding wheel according to claim 1, wherein in the step 3, the drying and heat preservation time is 1-3 hours.
CN201810749041.9A 2018-07-10 2018-07-10 Bronze-based CBN grinding wheel and preparation method thereof Active CN108818331B (en)

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CN111604820A (en) * 2020-05-27 2020-09-01 中铁隆昌铁路器材有限公司 Porous steel rail grinding CBN grinding wheel and preparation method thereof
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CN105803237B (en) * 2016-04-22 2018-08-31 柳州凯通新材料科技有限公司 A kind of preparation process of bronze base diamond grinding wheel piece
CN105834923A (en) * 2016-04-22 2016-08-10 柳州凯通新材料科技有限公司 Processing method of bronze-based diamond grinding wheel
CN106625297B (en) * 2016-11-29 2018-05-29 磐维科技（青岛）有限公司 A kind of metal binder cubic boron nitride emery wheel

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