CN106699140A - High-hardness ceramic cutting head - Google Patents
High-hardness ceramic cutting head Download PDFInfo
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- CN106699140A CN106699140A CN201710069163.9A CN201710069163A CN106699140A CN 106699140 A CN106699140 A CN 106699140A CN 201710069163 A CN201710069163 A CN 201710069163A CN 106699140 A CN106699140 A CN 106699140A
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Abstract
The invention relates to a high-hardness ceramic cutting head, which is prepared from the following raw materials in parts by weight: 30 to 45 parts of Al2O3, 15 to 25 parts of TiCN, 12 to 18 parts of WC, 3 to 5 parts of MoC, 0.4 to 8 parts of MgO, 5 to 7 parts of BN, 3 to 5 parts of SiN4, and 1 to 3 parts of pretreated graphene powder. A pretreatment method of the graphene powder comprises the steps of mixing graphene and 2-chloro-4,6-dimethoxy-1,3,5-triazine according to the mass ratio of 1:0.02 to 0.05; placing in an ethanol solution with the concentration being 20 to 35 weight percent; stirring while ultrasonically dispersing for 30 to 50 minutes; then drying in a microwave oven. The ceramic cutting head prepared through the invention not only has high hardness and high wear resistance shared by an existing ceramic cutter, but also has high toughness and long service life, is not easy to crack, and is beneficial to greatly improving the practicability of the ceramic cutter.
Description
Technical field
The present invention relates to the high hardness wear-resisting pottery cutting-tool engineering field that machine-building is used, more particularly, to a kind of graphite
The enhanced high-hardness ceramic cutting head of alkene.
Background technology
With the reach of science and progress, machining develops towards high speed, highly-efficient processing direction, especially difficult processing material
That expects continues to bring out, and the performance to cutting tool proposes higher and higher requirement.The performance of cutter is largely
Depending on the performance of cutter material.Because ceramic cutting tool material has hardness chemical stability high, corrosion-resistant, wear-resistant and good
The features such as and obtained researcher and widely paid close attention to.
It is strong, chemical that ceramic cutting-tool possesses high rigidity, high density, high temperature resistant, diamagneticization, anti-oxidant, corrosion resistance
The features such as good stability, high-wearing feature, be the good substitute of the tradition cutting element such as high-speed steel, solves the resources such as molybdenum, nickel
Rare problem.But current ceramic cutting material still exists relatively costly, toughness is inadequate, fragility is big, hardness is uneven,
The problems such as poor radiation, bad self lubricity, is, it is necessary to solve.
Commonly used and difficult-to-machine material with High Speed Cutting Technique emerges in multitude, in actual cut process
In, cutting force is greatly increased with cutting heat, exacerbates the abrasion of cutter material.It is therefore desirable to cutter material not only has well
Comprehensive mechanical property, should also have anti-friction wear-resistant characteristic concurrently.
At present, toughness reinforcing mode main for sintex includes transformation toughening, particulate reinforcement and whisker, fiber reinforced.
But transformation toughening is of limited application, ZrO is only limitted to substantially2Inversion of phases.Particulate reinforcement can be improved by the pinning of crystal grain
The toughness of cutter, but effect is not notable.Whisker, fiber are remarkably improved cutter toughness, but one-dimensional fiber, CNT
Easily reunite, be unfavorable for the improvement of cutter comprehensive mechanical property.
Graphene, the isomer of CNT, one kind is by sp2The carbon atom of hydridization is formed with hexagon periodic arrangement
Two-dimensional structure.Graphene has very excellent materialization and mechanical property, and thermal conductivity factor is up to 5000Wm-1K-1, intensity reaches
130GPa, fracture strength is about 125GPa.Its unique 2D laminated structure, can effectively suppress the reunion of Graphene.Graphite
Alkene nanometer sheet is made up of several layer graphenes, surface area and fabulous mechanical property with superelevation.Therefore, graphene nanometer sheet
Had a extensive future at the toughened and reinforced aspect of sintex, and its superelevation heat conductivility be also sintex necessary to.
Most of sintex is obtained by hot pressed sintering, and hot pressed sintering is heated while pressurization, is beneficial to
Contact, diffusion and the flowing of particle, are readily obtained higher close to the performance of the sintered body of solid density.But hot pressed sintering efficiency compared with
It is low, it is difficult to produce in enormous quantities and cost is also high.
The content of the invention
In view of the above-mentioned problems existing in the prior art, the applicant provides a kind of high-hardness ceramic cutting head.The present invention
The ceramic cutting head for preparing not only has high rigidity, the high-wearing feature that existing sintex has, but also with high-ductility
Property, long service life is not easy to crack, substantially increases the Practical Performance of sintex.
Technical scheme is as follows：
A kind of high-hardness ceramic cutting head, is made up of the raw material of following parts by weight：
Al2O3：30~45 parts；
TiCN：15~25 parts；
WC：12~18 parts；
MoC：3~5 parts；
MgO：4~8 parts；
BN：5~7 parts；
SiN4：3~5 parts；
Pretreated Graphene powder：1~3 part；
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:
0.02~0.05 mass ratio mixing, is put into concentration in 20~35wt% ethanol solutions, while stirring ultrasonic disperse 30~50
Minute, then dried in micro-wave oven.
The particle diameter of each raw material is respectively less than 80 microns.Preferably, the particle diameter of each raw material is respectively less than 30 microns.
Preferably, the high-hardness ceramic cutting head is made up of the raw material of following parts by weight：
Al2O3：42 parts；
TiCN：21 parts；
WC：16 parts；
MoC：4 parts；
MgO：6 parts；
BN：6 parts；
SiN4：3 parts；
Pretreated Graphene powder：2 parts.
The preparation method of described high-hardness ceramic cutting head is comprised the following steps that：
(1) after other raw materials in addition to pretreated Graphene are mixed, addition weight is these raw materials 8~16%
Absolute ethyl alcohol, insert in planetary mills and mixed and ground 1~4 hour；
(2) it is subsequently adding pretreated Graphene powder and silane coupler that weight is the Graphene powder 5~7%,
Continue ball milling 60~80 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation is pushed in 35~45MPa pressure
System is molded for 25~45 minutes；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1620~1680 DEG C, and the time keeps 60~80
Minute；
(5) room temperature and then with 12~18 DEG C per minute of speed is cooled to, is tempered after being kept for 12~20 minutes at room temperature,
Kept for 25~35 minutes at 680~720 DEG C, then naturally cool to room temperature.
Preferably, the silane coupler is isobutyl triethoxy silane.
Wherein, the molecular structural formula of 2- chlorine-4,6-dimethoxy-1,3,5-triazines is as follows：
The present invention is beneficial to be had technical effect that：
Graphene has very excellent performance, but due to its own easy agglomeration, it is difficult to it is dispersed in other things
In material；Along with Graphene is two-dimension plane structure, if be randomly distributed in crystal, crystal can be caused face type easily occur
Defect, so as to destroy the hardness and wearability of crystal.
The applicant is by the modification to Graphene so that graphene dispersion is good, holds when mixing with other raw materials
Easily it is dispersed between other raw materials, and has being overlapped by hydrogen bond for orientation in the presence of specific silane coupler
In mixed material, its orientation, graphite in the ceramic crystal obtained after final sintering will not be broken in the case of granulation and hot pressing
Stress surface when alkene plane is cut with cutting head is parallel, so as to greatly strengthen the toughness and wearability of cutting head.
Specific embodiment
Embodiment 1
A kind of high-hardness ceramic cutting head, is made up of the raw material of following parts by weight：
Al2O3：30 parts；TiCN：15 parts；WC：12 parts；MoC：3 parts；MgO：4 parts；BN：5 parts；SiN4：3 parts；It is pretreated
Graphene powder：1 part；
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:
0.02 mass ratio mixing, is put into concentration in 20wt% ethanol solutions, while stirring ultrasonic disperse 30 minutes, then in microwave
Dried in stove.
The particle diameter of each raw material is respectively less than 80 microns.The preparation method specific steps of described high-hardness ceramic cutting head
It is as follows：
(1) after other raw materials in addition to pretreated Graphene are mixed, the nothing that weight is these raw materials 8% is added
Water-ethanol, inserts in planetary mills and is mixed and ground 1 hour；
(2) it is subsequently adding pretreated Graphene powder and isobutyl group triethoxy that weight is the Graphene powder 5%
Silane coupler, continues ball milling 60 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation suppresses 45 under 35MPa pressure
Minute shaping；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1620 DEG C, and the time is kept for 80 minutes；
(5) room temperature and then with 12 DEG C per minute of speed is cooled to, is tempered after being kept for 12 minutes at room temperature, at 680 DEG C
Kept for 35 minutes, then naturally cool to room temperature.
Embodiment 2
A kind of high-hardness ceramic cutting head, is made up of the raw material of following parts by weight：
Al2O3：42 parts；TiCN：21 parts；WC：16 parts；MoC：4 parts；MgO：6 parts；BN：6 parts；SiN4：3 parts；It is pretreated
Graphene powder：2 parts.
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:
0.02 mass ratio mixing, is put into concentration in 20wt% ethanol solutions, while stirring ultrasonic disperse 50 minutes, then in microwave
Dried in stove.
The particle diameter of each raw material is respectively less than 30 microns.The preparation method specific steps of described high-hardness ceramic cutting head
It is as follows：
(1) after other raw materials in addition to pretreated Graphene are mixed, it is these raw materials 10% to add weight
Absolute ethyl alcohol, inserts in planetary mills and is mixed and ground 2 hours；
(2) it is subsequently adding pretreated Graphene powder and isobutyl group triethoxy that weight is the Graphene powder 6%
Silane coupler, continues ball milling 70 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation suppresses 30 under 40MPa pressure
Minute shaping；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1650 DEG C, and the time is kept for 70 minutes；
(5) room temperature and then with 15 DEG C per minute of speed is cooled to, is tempered after being kept for 16 minutes at room temperature, at 700 DEG C
Kept for 30 minutes, then naturally cool to room temperature.
Embodiment 3
A kind of high-hardness ceramic cutting head, is made up of the raw material of following parts by weight：
Al2O3：42 parts；TiCN：21 parts；WC：16 parts；MoC：4 parts；MgO：6 parts；BN：6 parts；SiN4：3 parts；It is pretreated
Graphene powder：2 parts.
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:
0.04 mass ratio mixing, is put into concentration in 25wt% ethanol solutions, while stirring ultrasonic disperse 40 minutes, then in microwave
Dried in stove.
The particle diameter of each raw material is respectively less than 30 microns.The preparation method specific steps of described high-hardness ceramic cutting head
It is as follows：
(1) after other raw materials in addition to pretreated Graphene are mixed, it is these raw materials 12% to add weight
Absolute ethyl alcohol, inserts in planetary mills and is mixed and ground 3 hours；
(2) it is subsequently adding pretreated Graphene powder and isobutyl group triethoxy that weight is the Graphene powder 6%
Silane coupler, continues ball milling 74 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation suppresses 35 under 42MPa pressure
Minute shaping；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1660 DEG C, and the time is kept for 65 minutes；
(5) room temperature and then with 16 DEG C per minute of speed is cooled to, is tempered after being kept for 18 minutes at room temperature, at 710 DEG C
Kept for 28 minutes, then naturally cool to room temperature.
Embodiment 4
A kind of high-hardness ceramic cutting head, is made up of the raw material of following parts by weight：
Al2O3：45 parts；TiCN：25 parts；WC：18 parts；MoC：5 parts；MgO：8 parts；BN：7 parts；SiN4：5 parts；It is pretreated
Graphene powder：3 parts；
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:
0.05 mass ratio mixing, is put into concentration in 35wt% ethanol solutions, while stirring ultrasonic disperse 50 minutes, then in microwave
Dried in stove.
The particle diameter of each raw material is respectively less than 80 microns.The preparation method specific steps of described high-hardness ceramic cutting head
It is as follows：
(1) after other raw materials in addition to pretreated Graphene are mixed, it is these raw materials 16% to add weight
Absolute ethyl alcohol, inserts in planetary mills and is mixed and ground 4 hours；
(2) it is subsequently adding pretreated Graphene powder and isobutyl group triethoxy that weight is the Graphene powder 7%
Silane coupler, continues ball milling 80 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation suppresses 25 under 45MPa pressure
Minute shaping；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1680 DEG C, and the time is kept for 60 minutes；
(5) room temperature and then with 18 DEG C per minute of speed is cooled to, is tempered after being kept for 20 minutes at room temperature, at 720 DEG C
Kept for 25 minutes, then naturally cool to room temperature.
Test case 1：
The ceramic cutting head that embodiment 1~4 is prepared carries out performance test, and test result is as shown in table 1.
Table 1
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Vickers hardness (GPa) | 22.1 | 23.9 | 24.8 | 22.6 |
| Bending strength (MPa) | 1510 | 1590 | 1620 | 1530 |
| Fracture toughness (MPam1/2) | 12.3 | 13.7 | 14.5 | 12.6 |
| Fatigue strength (MPa) | 643 | 754 | 767 | 690 |
Remarks：Anti-fatigue performance is tested, and Kt=1, stress ratio R=0.5, cycle frequency f=120Hz, cycle-index N >=
107。
Claims (6)
1. a kind of high-hardness ceramic cutting head, it is characterised in that be made up of the raw material of following parts by weight：
Al2O3：30~45 parts；
TiCN：15~25 parts；
WC：12~18 parts；
MoC：3~5 parts；
MgO：4~8 parts；
BN：5~7 parts；
SiN4：3~5 parts；
Pretreated Graphene powder：1~3 part；
The preprocess method of the Graphene is：By Graphene and the chloro- 4,6- dimethoxys -1,3,5- triazines of 2- according to 1:0.02
~0.05 mass ratio mixing, is put into concentration in 20~35wt% ethanol solutions, while stirring ultrasonic disperse 30~50 minutes,
Then dried in micro-wave oven.
2. high-hardness ceramic cutting head according to claim 1, it is characterised in that the particle diameter of each raw material is respectively less than 80
Micron.
3. high-hardness ceramic cutting head according to claim 1, it is characterised in that the particle diameter of each raw material is respectively less than 30
Micron.
4. high-hardness ceramic cutting head according to claim 1, it is characterised in that be made up of the raw material of following parts by weight：
Al2O3：42 parts；
TiCN：21 parts；
WC：16 parts；
MoC：4 parts；
MgO：6 parts；
BN：6 parts；
SiN4：3 parts；
Pretreated Graphene powder：2 parts.
5. a kind of preparation method of the high-hardness ceramic cutting head described in any one of Claims 1 to 5, it is characterised in that specific step
It is rapid as follows：
(1) after other raw materials in addition to pretreated Graphene are mixed, the nothing that weight is these raw materials 8~16% is added
Water-ethanol, inserts in planetary mills and is mixed and ground 1~4 hour；
(2) it is subsequently adding pretreated Graphene powder and silane coupler that weight is the Graphene powder 5~7%, continues
Ball milling 60~80 minutes；
(3) the pureed product that will be obtained after ball milling carries out mist projection granulating, and the material after granulation suppresses 25 under 35~45MPa pressure
It is molded within~45 minutes；
(4) material after compressing carries out high temperature sintering, and sintering temperature is 1620~1680 DEG C, and the time is kept for 60~80 points
Clock；
(5) room temperature and then with 12~18 DEG C per minute of speed is cooled to, is tempered after being kept for 12~20 minutes at room temperature, 680
Kept for 25~35 minutes at~720 DEG C, then naturally cool to room temperature.
6. the preparation method of high-hardness ceramic cutting head according to claim 5, it is characterised in that the silane coupler
It is isobutyl triethoxy silane.
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| CN111056852A (en) * | 2019-12-19 | 2020-04-24 | 西安交通大学 | Binding phase-free WC-based hard alloy cutter material and preparation method thereof |
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