CN109514442A - A kind of CBN grinding wheel and preparation method thereof - Google Patents
A kind of CBN grinding wheel and preparation method thereof Download PDFInfo
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- CN109514442A CN109514442A CN201810748957.2A CN201810748957A CN109514442A CN 109514442 A CN109514442 A CN 109514442A CN 201810748957 A CN201810748957 A CN 201810748957A CN 109514442 A CN109514442 A CN 109514442A
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- abrasive material
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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
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
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- Polishing Bodies And Polishing Tools (AREA)
Abstract
A kind of CBN grinding wheel and preparation method thereof, belongs to super hard abrasive field；Grinding wheel includes steel core, abrasive material circle, and steel core and abrasive material circle are combined by resin glue caking agent；Abrasive material circle is prepared by CBN abrasive material, metallic bond and additional adhesive: metallic bond contains Cu powder and Ti powder；Abrasive material circle composition: CBN abrasive material, metallic bond and hole；Preparation method: 1) CBN abrasive material, Cu powder and Ti powder is mixed into obtain mixture A；2) additional adhesive is mixed into obtain mixture B with mixture A；3) mixture B is dried；4) the mixture B after drying is sieved；5) by the mixture B after sieving, abrasive material circle green compact are made in cold moudling；6) cooling after being sintered abrasive material circle green compact under inert gas atmosphere, obtain abrasive material circle green body；7) resin glue caking agent is used, abrasive material circle green body and steel core are bonded, CBN grinding wheel is made.
Description
Technical field
The present invention relates to super hard abrasive fields, and in particular to a kind of CBN grinding wheel and preparation method thereof.
Background technique
With modern mechanical processing towards high-precision, at high speed, hard processing, dry processing (no coolant liquid) and reduce cost etc.
Direction is developed, and proposes quite high requirement to grinding tool performance.Traditional silicon carbide and corundum conventional abrasive material mold cannot be complete
The current high speed of full up foot, efficient, high-precision grinding requirement, therefore various excellent wear-resisting properties are developed, it can carry out for a long time steady
Surely the superhard removing material processed is inevitable development trend.Currently used superhard removing material includes cubic boron nitride
(CBN) and two kinds of abrasive materials of diamond.Though the hardness of cubic boron nitride abrasive materials is lower than diamond, but still is much higher than corundum and silicon carbide
Material, and the thermal stability of the abrasive material is better than diamond, there is good Wear-resistant corrosion-resistant.Cubic boron nitride abrasive wheel can not only
The high-strength tenacities such as titanium alloy, nickel base superalloy applied to efficient precise grinding aircraft engine parts (such as disk, axis)
Unmanageable material, and will not react with iron and ferroalloy and can be widely applied for ferrous alloy (ferrous metal) material
Expect such as hardened steel, high-speed tool steel, bearing steel, stainless steel, mould steel, heat resisting steel, advanced high-strength steel and rich chromium cast iron material.
The performances such as grinding efficiency, machining accuracy and the wearability of CBN super-hard abrasive tool (grinding wheel) are the key that in High-speed & Precision Grinding processing
Problem.
Bonding agent in super-hard abrasive tool for fixed grain is the key factor for influencing super-hard abrasive tool performance.Traditional is super
Hard grind tool (grinding wheel) mostly uses the techniques manufactures such as resin, ceramics, metallic bond sintering and plating, the problem is that monocrystalline
Grain is only embedded in bonding agent and electroplated layer by machinery embedding, weaker with bonding agent and plating interlayer active force.It is specific next
It says, although resinoid bond is easier processing and modifies, but poor heat resistance, and bond strength is low, and abrasive material falls off seriously, serious shadow
Ring efficiency；Vitrified bond finishing is relatively easy, and using temperature height, however brittleness is big, and toughness and fatigability are poor, Yi Fa
Raw embrittlement, it is difficult to be used for High-speed machining.Although it is strong that metallic bond is sintered heat resistance, between usual bonding agent and abrasive grain not
Enhanced primary treatment can be generated, thus abrasive grain is only embedded in bonding agent by machinery embedding, holding power is limited；In metal plating
Abrasive grain is also only mechanically embedded.Therefore it is easy to fall off because of abrasive material in particle and is removed in flakes with coating due to lead to the entirety of grinding wheel
Failure, such situation are especially apparent in more unmanageable material high efficient grinding；In addition, plating thickness, abrasive material proud exposure
Low, chip space is small, and when grinding is easy to fail because the adherency of chip blocks.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of CBN grinding wheel and preparation method thereof, which is one kind in height
The CBN grinding wheel compared with big load can be born in fast grinding process, while there is outstanding impact resistance and good shape retention,
Its specific technical solution is as follows:
A kind of CBN grinding wheel of the invention comprising steel core, abrasive material circle, steel core and abrasive material circle pass through resin glue caking agent knot
It closes, wherein abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 35~55%, metallic bond: 40~
60%, additional adhesive: the sum of 5~25%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；
The metallic bond contains the mass percent of ingredient are as follows: Cu powder: 40~70%, Ti powder: 35~65%, Cu powder and Ti powder
The sum of mass percent is 100%；Abrasive material circle composition presses percent by volume are as follows: CBN abrasive material 10~55%, metallic bond 10~
47%, hole 20~45%, the sum of CBN abrasive material, percent by volume of metallic bond and hole are 100%.
The particle size range of the Cu powder and Ti powder is 20~350 μm.
The additional adhesive is acrylic emulsion.
A kind of preparation method of CBN grinding wheel of the invention, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, mixture A is made；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is uniformly mixed with mixture A, mixture B is made；
Step 3, it dries:
Mixture B is heated to 50~250 DEG C, is dried in mass ratio, the mixture B after drying: the mixing before drying
Expect B=80~95%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 20~350 mesh；
Step 5, it forms:
By the mixture B after sieving, uniformly putting into mold, cold moudling, pressure is 40~150MPa, pressure maintaining 10~
Abrasive material circle green compact are made in 70min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 3~10 DEG C/min, from room temperature liter
Temperature is to 1050~1250 DEG C of sintering temperature, 10~150min of sintering time；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Above-mentioned a kind of CBN grinding wheel and preparation method thereof, in which:
In the step 1, incorporation time is 1~4h.
It in the step 2, stirs by mixing, mixing time is 0.5~3h.
In the step 3, drying soaking time is 1~3h.
In the step 4, it is sieved 2~8 times.
In the step 5, cold moudling uses hydraulic press.
In the step 6, inert gas is argon gas.
A kind of CBN grinding wheel of the invention and preparation method thereof, compared with prior art, has the beneficial effect that
(1) temperature that there is CBN grinding wheel of the invention fabulous thermal conductivity can quickly reduce grinding workpiece surface, from
And power loss is reduced, improve grinding speed；Additional adhesive in formula is conducive to the formation of product hole, can effectively increase
The space of the abrasive grain to fall off is accommodated greatly, and the utilization of abrasive material is more abundant, while metallic bond has extremely strong holding power；Grinding wheel tool
There is the features such as grinding efficiency is high, grinding temperature is low, power loss is low, good processing accuracy, long service life.
(2) preparation method provided by the invention, since sintering time is short, the characteristic of abrasive material is not damaged, sintering temperature
Degree, metallic bond, porosity and the control of time, making grinding wheel during the work time has good thermal conductivity and biggish appearance
Receive the space of metal fillings and abrasive material, be also not easy to plug during high-speed grinding, be ground sharp, grinding accuracy is high, and have from
Sharp property.
Specific embodiment
Below with reference to specific implementation case, the invention will be further described, but the invention is not limited to these to implement
Example.
In following embodiment, inert gas is argon gas.
Embodiment 1
A kind of CBN grinding wheel comprising steel core, abrasive material circle, steel core and abrasive material circle are combined by resin glue caking agent, wherein
Abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 45%, metallic bond: and 45%, additional adhesive:
The sum of 10%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；The metallic bond contains
The mass percent of ingredient are as follows: Cu powder: 50%, Ti powder: the sum of 50%, Cu powder and Ti powder mass percent are 100%；Abrasive material circle
Composition presses percent by volume are as follows: CBN abrasive material 42%, metallic bond 38%, hole 20%, CBN abrasive material, metallic bond and hole
The sum of percent by volume of gap is 100%；The partial size of the CBN abrasive material, Cu powder and Ti powder is 20 μm；The auxiliary is viscous
Knot agent is acrylic emulsion.
The preparation method of above-mentioned CBN grinding wheel, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, incorporation time 1h, are made
Obtain mixture A；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is mixed with mixture A and is stirred by mixing, is stirred
Mixing the time is 1h, and mixture B is made；
Step 3, it dries:
Mixture B is heated to 65 DEG C, drying soaking time is 1h, in mass ratio, the mixture B after drying: before drying
Mixture B=90%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 100 mesh, is sieved 3 times；
Step 5, it forms:
It uniformly puts into mold, the mixture B after sieving using hydraulic press cold moudling, pressure 75MPa, pressure maintaining
Abrasive material circle green compact are made in 40min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature
To 1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Embodiment 2
A kind of CBN grinding wheel comprising steel core, abrasive material circle, steel core and abrasive material circle are combined by resin glue caking agent, wherein
Abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 45%, metallic bond: and 40%, additional adhesive:
The sum of 15%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；The metallic bond contains
The mass percent of ingredient are as follows: Cu powder: 50%, Ti powder: the sum of 50%, Cu powder and Ti powder mass percent are 100%；Abrasive material circle
Composition presses percent by volume are as follows: CBN abrasive material 42%, metallic bond 33%, hole 25%, CBN abrasive material, metallic bond and hole
The sum of percent by volume of gap is 100%；The partial size of the CBN abrasive material, Cu powder and Ti powder is 50 μm；The auxiliary is viscous
Knot agent is acrylic emulsion.
The preparation method of above-mentioned CBN grinding wheel, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, incorporation time 1h, are made
Obtain mixture A；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is mixed with mixture A and is stirred by mixing, is stirred
Mixing the time is 1h, and mixture B is made；
Step 3, it dries:
Mixture B is heated to 65 DEG C, drying soaking time is 1h, in mass ratio, the mixture B after drying: before drying
Mixture B=90%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 100 mesh, is sieved 3 times；
Step 5, it forms:
It uniformly puts into mold, the mixture B after sieving using hydraulic press cold moudling, pressure 75MPa, pressure maintaining
Abrasive material circle green compact are made in 40min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature
To 1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Embodiment 3
A kind of CBN grinding wheel comprising steel core, abrasive material circle, steel core and abrasive material circle are combined by resin glue caking agent, wherein
Abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 40%, metallic bond: and 40%, additional adhesive:
The sum of 20%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；The metallic bond contains
The mass percent of ingredient are as follows: Cu powder: 55%, Ti powder: the sum of 45%, Cu powder and Ti powder mass percent are 100%；Abrasive material circle
Composition presses percent by volume are as follows: CBN abrasive material 38%, metallic bond 32%, hole 30%, CBN abrasive material, metallic bond and hole
The sum of percent by volume of gap is 100%；The partial size of the CBN abrasive material, Cu powder and Ti powder is 100 μm；The auxiliary
Binder is acrylic emulsion.
The preparation method of above-mentioned CBN grinding wheel, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, incorporation time 1h, are made
Obtain mixture A；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is mixed with mixture A and is stirred by mixing, is stirred
Mixing the time is 1h, and mixture B is made；
Step 3, it dries:
Mixture B is heated to 65 DEG C, drying soaking time is 1h, in mass ratio, the mixture B after drying: before drying
Mixture B=90%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 100 mesh, is sieved 3 times；
Step 5, it forms:
It uniformly puts into mold, the mixture B after sieving using hydraulic press cold moudling, pressure 75MPa, pressure maintaining
Abrasive material circle green compact are made in 40min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature
To 1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Embodiment 4
A kind of CBN grinding wheel comprising steel core, abrasive material circle, steel core and abrasive material circle are combined by resin glue caking agent, wherein
Abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 35%, metallic bond: and 43%, additional adhesive:
The sum of 22%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；The metallic bond contains
The mass percent of ingredient are as follows: Cu powder: 60%, Ti powder: the sum of 40%, Cu powder and Ti powder mass percent are 100%；Abrasive material circle
Composition presses percent by volume are as follows: CBN abrasive material 32%, metallic bond 35%, hole 33%, CBN abrasive material, metallic bond and hole
The sum of percent by volume of gap is 100%；The partial size of the CBN abrasive material, Cu powder and Ti powder is 150 μm；The auxiliary
Binder is acrylic emulsion.
The preparation method of above-mentioned CBN grinding wheel, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, incorporation time 1h, are made
Obtain mixture A；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is mixed with mixture A and is stirred by mixing, is stirred
Mixing the time is 1h, and mixture B is made；
Step 3, it dries:
Mixture B is heated to 65 DEG C, drying soaking time is 1h, in mass ratio, the mixture B after drying: before drying
Mixture B=90%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 100 mesh, is sieved 3 times；
Step 5, it forms:
It uniformly puts into mold, the mixture B after sieving using hydraulic press cold moudling, pressure 75MPa, pressure maintaining
Abrasive material circle green compact are made in 40min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature
To 1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Embodiment 5
A kind of CBN grinding wheel comprising steel core, abrasive material circle, steel core and abrasive material circle are combined by resin glue caking agent, wherein
Abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 35%, metallic bond: and 40%, additional adhesive:
The sum of 25%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；The metallic bond contains
The mass percent of ingredient are as follows: Cu powder: 53%, Ti powder: the sum of 47%, Cu powder and Ti powder mass percent are 100%；Abrasive material circle
Composition presses percent by volume are as follows: CBN abrasive material 32%, metallic bond 33%, hole 35%, CBN abrasive material, metallic bond and hole
The sum of percent by volume of gap is 100%；The partial size of the CBN abrasive material, Cu powder and Ti powder is 250 μm；The auxiliary
Binder is acrylic emulsion.
The preparation method of above-mentioned CBN grinding wheel, includes the following steps:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, incorporation time 1h, are made
Obtain mixture A；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is mixed with mixture A and is stirred by mixing, is stirred
Mixing the time is 1h, and mixture B is made；
Step 3, it dries:
Mixture B is heated to 65 DEG C, drying soaking time is 1h, in mass ratio, the mixture B after drying: before drying
Mixture B=90%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 100 mesh, is sieved 3 times；
Step 5, it forms:
It uniformly puts into mold, the mixture B after sieving using hydraulic press cold moudling, pressure 75MPa, pressure maintaining
Abrasive material circle green compact are made in 40min；
Step 6, it is sintered:
(1) it by abrasive material circle green compact, is sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature
To 1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
Claims (7)
1. a kind of CBN grinding wheel, which is characterized in that it includes steel core, abrasive material circle, and steel core and abrasive material circle pass through resin glue caking agent knot
It closes, wherein abrasive material circle is prepared from the following components by mass percentage: CBN abrasive material: 35~55%, metallic bond: 40~
60%, additional adhesive: the sum of 5~25%, CBN abrasive material, metallic bond and additional adhesive mass percent are 100%；
The metallic bond contains the mass percent of ingredient are as follows: Cu powder: 40~70%, Ti powder: 35~65%, Cu powder and Ti powder
The sum of mass percent is 100%；Abrasive material circle composition presses percent by volume are as follows: CBN abrasive material 10~55%, metallic bond 10~
47%, hole 20~45%, the sum of CBN abrasive material, percent by volume of metallic bond and hole are 100%.
2. a kind of CBN grinding wheel according to claim 1, which is characterized in that the particle size range of the Cu powder and Ti powder is equal
It is 20~350 μm.
3. a kind of CBN grinding wheel according to claim 1, which is characterized in that the additional adhesive is acrylic emulsion.
4. a kind of preparation method of CBN grinding wheel described in claim 1, which comprises the steps of:
Step 1, mixing:
By a kind of composition proportion of CBN grinding wheel, CBN abrasive material, Cu powder and Ti powder are uniformly mixed, mixture A is made；
Step 2, mixing:
By a kind of composition proportion of CBN grinding wheel, additional adhesive is uniformly mixed with mixture A, mixture B is made；
Step 3, it dries:
Mixture B is heated to 50~250 DEG C, is dried in mass ratio, the mixture B after drying: the mixture B=before drying
80~95%；
Step 4, it is sieved:
By the mixture B sieving after drying, crossing grit number is 20~350 mesh；
Step 5, it forms:
By the mixture B after sieving, uniformly putting into mold, cold moudling, pressure is 40~150MPa, 10~70min of pressure maintaining,
Abrasive material circle green compact are made；
Step 6, it is sintered:
(1) by abrasive material circle green compact, be sintered under inert gas atmosphere, with the heating rate of 3~10 DEG C/min, from room temperature to
1050~1250 DEG C of sintering temperature, 10~150min of sintering time；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, abrasive material circle green body is made；
Step 7, it bonds:
With resin glue caking agent, abrasive material circle green body and steel core are bonded, remove Burr removal, CBN grinding wheel is made in finishing molding.
5. a kind of preparation method of CBN grinding wheel according to claim 4, which is characterized in that in the step 1, when mixing
Between be 1~4h.
6. a kind of preparation method of CBN grinding wheel according to claim 4, which is characterized in that in the step 2, by stirring
Mix it is uniformly mixed, mixing time be 0.5~3h.
7. a kind of preparation method of CBN grinding wheel according to claim 4, which is characterized in that in the step 3, drying is protected
The warm time is 1~3h.
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Cited By (4)
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| CN109971987A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of grinding wheel base body copper-titanium alloy and preparation method thereof |
| CN109971988A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of superhigh intensity copper-titanium alloy and preparation method thereof |
| CN109971995A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of high crisp copper-titanium alloy and preparation method thereof firmly |
| 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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| CN109971987A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of grinding wheel base body copper-titanium alloy and preparation method thereof |
| CN109971988A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of superhigh intensity copper-titanium alloy and preparation method thereof |
| CN109971995A (en) * | 2019-04-02 | 2019-07-05 | 东北大学 | A kind of high crisp copper-titanium alloy and preparation method thereof firmly |
| 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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Application publication date: 20190326 |