CN104043882B - Boron carbide-zirconium boride-copper nickel electrode material and preparation method - Google Patents
Boron carbide-zirconium boride-copper nickel electrode material and preparation method Download PDFInfo
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- CN104043882B CN104043882B CN201410319933.7A CN201410319933A CN104043882B CN 104043882 B CN104043882 B CN 104043882B CN 201410319933 A CN201410319933 A CN 201410319933A CN 104043882 B CN104043882 B CN 104043882B
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Abstract
Boron carbide-zirconium boride-copper nickel electrode material and preparation method, the invention belongs to electric discharging machining electrode materials application technical field, and it is in order to the poor problem of the poorly conductive and Burning corrosion resistance that solve the electrode material on existing electrical process machine.Boron carbide-zirconium boride-copper nickel electrode material by mass percentage by 55% ~ 65% boron carbide powder, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are made.Preparation method: each raw material is placed in the mixing of ball mill wet ball grinding, obtains slurry; Two, slurry is dried under being placed in vacuum condition, grinds and obtains mixed powder; Three, mixed powder is placed in high temperature sintering under the protection of argon hydrogen, completes the preparation of electrode material.The resistivity of combination electrode material prepared by the present invention is (1.3-3.0) × 10
-5Ω/m, linear ablative rate is (0.001 ~ 0.1) s/min, shows good electric conductivity and Burning corrosion resistance.
Description
Technical field
The invention belongs to electric discharging machining electrode materials application technical field, be specifically related to a kind of boron carbide-zirconium boride-copper nickel composite material and preparation method thereof.
Background technology
The crudy of precision EDM lathe depends primarily on electrode material, and wherein the conductive characteristic of electrode material and Burning corrosion resistance have the greatest impact to machined surface quality.The good conductivity of material can guarantee smooth striking between machined electrode and workpiece and electric discharge, is beneficial to the removal (ablation) of machined material; The Burning corrosion resistance of material can reduce well the electrode erosion in electric machining process, improves the precision of machining shape.Usually select red copper to do electrode material for traditional electric machining, its excellent conductivity, but Burning corrosion resistance is bad, needs in process to consume a large amount of copper, cause the great wasting of resources.
Preparing the good electric conductivity of new electrode materials importance major embodiment technically, to have again good high temperature resistance ablative.Therefore the research of new electrode materials receives the concern of scientific circles and industrial quarters.And existing boron carbide-based composite material mainly uses in abrasive art, the application in the electrode material of precision EDM have not been reported.
Summary of the invention
The electric conductivity that the object of the invention is to solve the electrode material on existing precision EDM lathe is poor, the problem that Burning corrosion resistance is poor, and provides a kind of boron carbide-zirconium boride-copper nickel electrode material and preparation method and application.
Boron carbide-zirconium boride-copper nickel electrode material of the present invention press mass percentage by 55% ~ 65% boron carbide powder, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are made, and wherein copper nickel mixed-powder is that the copper powder of 9:1 and nickel powder mix by mass ratio.
The preparation method of boron carbide-zirconium boride-copper nickel electrode material of the present invention follows these steps to realize:
One, the boron carbide powder of 55% ~ 65% is taken by mass percentage, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are as raw material, then the raw material taken is placed in ball mill, adopts wet ball grinding to be mixed by raw material, obtain slurry;
Two, dry under the slurry that step one obtains being placed in vacuum condition, the slurry after oven dry grinds and obtains mixed powder;
Three, under the mixed powder that step 2 obtains being placed in the protection of argon hydrogen mixture, 1 × 10 is not more than at atmosphere pressures
5pa, temperature is 1800 DEG C ~ 1850 DEG C, and sintering pressure is heat preservation sintering 1h ~ 3h under the condition of 30MPa ~ 40MPa, obtains boron carbide-zirconium boride-copper nickel electrode material;
Copper nickel mixed-powder wherein described in step one is that the copper powder of 9:1 and nickel powder form by mass ratio.
Boron carbide-zirconium boride of the present invention-copper nickel electrode material application is as electric discharging machining electrode material.
The present invention is by being incorporated in boron carbide-zirconium boride-copper nickel composite material system by boronation zirconium powder and copper nickel powder, significantly improve the electric conductivity of boron carbide-based composite material on the one hand, improve elevated temperature strength and the Burning corrosion resistance of material on the other hand, utilize mechanical alloying to reduce the sintering temperature of boron carbide-zirconium boride-copper nickel composite material simultaneously, thus prepare the boron carbide-zirconium boride-copper nickel composite material of function admirable.The room temperature tensile intensity of boron carbide-zirconium boride-copper nickel composite material that the present invention prepares is 200MPa ~ 300MPa, and resistivity is (1.3-3.0) × 10
-5Ω/m, linear ablative rate is (0.001 ~ 0.1) s/min.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of boron carbide-zirconium boride-copper nickel electrode material of the present invention.
Detailed description of the invention
Detailed description of the invention one: present embodiment boron carbide-zirconium boride-copper nickel electrode material press mass percentage by 55% ~ 65% boron carbide powder, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are made, and wherein copper nickel mixed-powder is that the copper powder of 9:1 and nickel powder mix by mass ratio.
Detailed description of the invention two: present embodiment and detailed description of the invention one are all not less than 98% unlike the purity of described boron carbide powder, zirconium boride powder and corronil powder.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two are not more than 10 μm unlike the particle diameter of described boron carbide powder, and the particle diameter of zirconium boride powder is not more than 5 μm, and the particle diameter of copper powder and nickel powder is not more than 10 μm.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three unlike boron carbide-zirconium boride-copper nickel electrode material press mass percentage by 60% boron carbide powder, the zirconium boride powder of 25% and the copper nickel mixed-powder of 15% are made.
Detailed description of the invention five: the preparation method of present embodiment boron carbide-zirconium boride-copper nickel electrode material follows these steps to realize:
One, the boron carbide powder of 55% ~ 65% is taken by mass percentage, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are as raw material, then the raw material taken is placed in ball mill, adopts wet ball grinding to be mixed by raw material, obtain slurry;
Two, dry under the slurry that step one obtains being placed in vacuum condition, the slurry after oven dry grinds and obtains mixed powder;
Three, under the mixed powder that step 2 obtains being placed in the protection of argon hydrogen mixture, 1 × 10 is not more than at atmosphere pressures
5pa, temperature is 1800 DEG C ~ 1850 DEG C, and sintering pressure is heat preservation sintering 1h ~ 3h under the condition of 30MPa ~ 40MPa, obtains boron carbide-zirconium boride-copper nickel electrode material;
Copper nickel mixed-powder wherein described in step one is that the copper powder of 9:1 and nickel powder form by mass ratio.
Detailed description of the invention six: present embodiment and detailed description of the invention five are take absolute ethyl alcohol as dispersant unlike the wet ball grinding described in step one, and the consumption of absolute ethyl alcohol is 1 ~ 2 times of raw material cumulative volume.Other step and parameter identical with detailed description of the invention five.
Detailed description of the invention seven: present embodiment and detailed description of the invention five or six are planetary ball mill unlike the ball mill described in step one, the rotating speed of ball mill is 220r/min ~ 400r/min, and ball material mass ratio is (5 ~ 8): 1.Other step and parameter identical with detailed description of the invention five or six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention five to seven are 70 DEG C ~ 80 DEG C unlike the temperature of drying in step 2.Other step and parameter identical with one of detailed description of the invention five to seven.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention five to eight are that the argon gas of 95% and the hydrogen of 5% form unlike the argon hydrogen mixture described in step 3 by volume ratio.
Detailed description of the invention ten: the boron carbide-zirconium boride described in present embodiment application detailed description of the invention one-copper nickel electrode material application is as electric discharging machining electrode material.
Detailed description of the invention 11: present embodiment and detailed description of the invention ten are unlike the spark machined of boron carbide-zirconium boride-copper nickel composite material being carried out to plane, curved surface, screw thread and hole.
Embodiment one: the preparation method of the present embodiment boron carbide-zirconium boride-copper nickel electrode material follows these steps to realize:
One, the boron carbide powder of 60% is taken by mass percentage, the zirconium boride powder of 25% and the copper nickel mixed-powder of 15% are as raw material, then the raw material taken is placed in ball mill, take absolute ethyl alcohol as dispersant, be 400r/min at the rotating speed of ball mill, ratio of grinding media to material is ball milling mixing 8h under the condition of 5: 1, obtains slurry;
Two, slurry step one obtained is dried under temperature is the vacuum condition of 80 DEG C, and the slurry after oven dry is placed in agate mortar and grinds, and obtains mixed powder;
Three, under the mixed powder that step 2 obtains being placed in the protection of argon hydrogen mixture, at atmosphere pressures 5 × 10
3pa, temperature is 1850 DEG C, and sintering pressure is heat preservation sintering 1h under the condition of 30MPa, obtains boron carbide-zirconium boride-copper nickel electrode material;
Copper nickel mixed-powder wherein described in step one is that the copper powder of 9:1 and nickel powder form by mass ratio.
In the present embodiment step one, the consumption of absolute ethyl alcohol is 1 times of raw material cumulative volume.
Embodiment two: the present embodiment and embodiment one take the boron carbide powder of 65% by mass percentage unlike step one, the zirconium boride powder of 30% and the copper nickel mixed-powder of 5% are as raw material.
Embodiment three: the present embodiment and embodiment one take the boron carbide powder of 55% by mass percentage unlike step one, the zirconium boride powder of 35% and the copper nickel mixed-powder of 10% are as raw material.
Embodiment four: the preparation method of the present embodiment boron carbide-zirconium boride-copper nickel electrode material follows these steps to realize:
One, the boron carbide powder of 60% is taken by mass percentage, the zirconium boride powder of 32% and the copper nickel mixed-powder of 8% are as raw material, then the raw material taken is placed in ball mill, take absolute ethyl alcohol as dispersant, be 220rpm at the rotating speed of ball mill, ratio of grinding media to material is ball milling mixing 10h under the condition of 8: 1, obtains slurry;
Two, slurry step one obtained is dried under temperature is the vacuum condition of 70 DEG C, and the slurry after oven dry is placed in agate mortar and grinds, and obtains mixed powder;
Three, under the mixed powder that step 2 obtains being placed in the protection of argon hydrogen mixture, at atmosphere pressures 7 × 10
4pa, temperature is 1800 DEG C, and sintering pressure is heat preservation sintering 2h under the condition of 35MPa, obtains boron carbide-zirconium boride-copper nickel electrode material;
Copper nickel mixed-powder wherein described in step one is that the copper powder of 9:1 and nickel powder form by mass ratio.
In the present embodiment step one, the consumption of absolute ethyl alcohol is 2 times of raw material cumulative volume.
Embodiment five: the present embodiment and embodiment four take the boron carbide powder of 56% by mass percentage unlike step one, the zirconium boride powder of 32% and the copper nickel mixed-powder of 12% are as raw material.
Embodiment six: the present embodiment and embodiment four take the boron carbide powder of 64% by mass percentage unlike step one, the zirconium boride powder of 30% and the copper nickel mixed-powder of 6% are as raw material.
It is 3 × 4 × 36mm that the boron carbide-zirconium boride-copper nickel composite material obtained embodiment one to embodiment six cuts into gauge length
3bending test specimen and Φ 3mm × 20mm resistivity measurement sample, and carry out polishing to specimen surface, then carry out mechanical property and resistivity measurement to the sample after polishing, its test result is in table 1.Table 2 is boron carbide-zirconium boride-copper nickel composite material anti-yaw damper performance test data.
Table 1
Table 2
| Embodiment | 1 | 2 | 3 | 4 |
| Temperature (DEG C) | 2000 | 2000 | 2600 | 2600 |
| Time (sec) | 300 | 300 | 300 | 300 |
| Linear ablative rate (mm/sec) | 1.11×10 -3 | 1.05×10 -2 | 0.092 | 0.0238 |
Claims (9)
1. boron carbide-zirconium boride-copper nickel electrode material, it is characterized in that this boron carbide-zirconium boride-copper nickel electrode material by mass percentage by 55% ~ 65% boron carbide powder, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are made, and wherein copper nickel mixed-powder is that the copper powder of 9:1 and nickel powder mix by mass ratio.
2. boron carbide-zirconium boride-copper nickel electrode material according to claim 1, is characterized in that the purity of described boron carbide powder, zirconium boride powder and corronil powder is all not less than 98%.
3. boron carbide-zirconium boride-copper nickel electrode material according to claim 1, is characterized in that the particle diameter of described boron carbide powder is not more than 10 μm, and the particle diameter of zirconium boride powder is not more than 5 μm, and the particle diameter of copper powder and nickel powder is not more than 10 μm.
4. boron carbide-zirconium boride-copper nickel electrode material according to claim 1, it is characterized in that boron carbide-zirconium boride-copper nickel electrode material by mass percentage by 60% boron carbide powder, the zirconium boride powder of 25% and the copper nickel mixed-powder of 15% are made.
5. the preparation method of boron carbide-zirconium boride-copper nickel electrode material, it is characterized in that following these steps to realize:
One, the boron carbide powder of 55% ~ 65% is taken by mass percentage, the zirconium boride powder of 20% ~ 40% and the copper nickel mixed-powder of 5% ~ 15% are as raw material, then the raw material taken is placed in ball mill, adopts wet ball grinding to be mixed by raw material, obtain slurry;
Two, dry under the slurry that step one obtains being placed in vacuum condition, the slurry after oven dry grinds and obtains mixed powder;
Three, under the mixed powder that step 2 obtains being placed in the protection of argon hydrogen mixture, 1 × 10 is not more than at atmosphere pressures
5pa, temperature is 1800 DEG C ~ 1850 DEG C, and sintering pressure is heat preservation sintering 1h ~ 3h under the condition of 30MPa ~ 40MPa, obtains boron carbide-zirconium boride-copper nickel electrode material;
Copper nickel mixed-powder wherein described in step one is that the copper powder of 9:1 and nickel powder form by mass ratio.
6. the preparation method of boron carbide-zirconium boride-copper nickel electrode material according to claim 5, it is characterized in that the wet ball grinding described in step one is take absolute ethyl alcohol as dispersant, and the consumption of absolute ethyl alcohol is 1 ~ 2 times of raw material cumulative volume.
7. the preparation method of boron carbide-zirconium boride-copper nickel electrode material according to claim 5, it is characterized in that the ball mill described in step one is planetary ball mill, the rotating speed of ball mill is 220r/min ~ 400r/min, and ball material mass ratio is (5 ~ 8): 1.
8. the preparation method of boron carbide-zirconium boride-copper nickel electrode material according to claim 5, is characterized in that the temperature of drying in step 2 is 70 DEG C ~ 80 DEG C.
9. the preparation method of boron carbide-zirconium boride-copper nickel electrode material according to claim 5, is characterized in that the argon hydrogen mixture described in step 3 is that the argon gas of 95% and the hydrogen of 5% form by volume ratio.
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| CN1775453A (en) * | 2005-11-30 | 2006-05-24 | 陈铮 | Copper alloy electrode for resistance weld and its manufacturing method |
| CN101337816A (en) * | 2008-08-29 | 2009-01-07 | 牡丹江金刚钻碳化硼有限公司 | Boron carbide-based composite material and preparation method thereof |
| CN103588216A (en) * | 2013-10-23 | 2014-02-19 | 航天材料及工艺研究所 | Method for preparing zirconium boride powder at low temperature according to boron/carbon thermal reduction method |
| CN103864405A (en) * | 2014-03-26 | 2014-06-18 | 山东理工大学 | Preparation process of rod-shaped zirconium boride powder, |
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| US8044561B2 (en) * | 2008-08-28 | 2011-10-25 | Federal-Mogul Ignition Company | Ceramic electrode, ignition device therewith and methods of construction thereof |
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Patent Citations (4)
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|---|---|---|---|---|
| CN1775453A (en) * | 2005-11-30 | 2006-05-24 | 陈铮 | Copper alloy electrode for resistance weld and its manufacturing method |
| CN101337816A (en) * | 2008-08-29 | 2009-01-07 | 牡丹江金刚钻碳化硼有限公司 | Boron carbide-based composite material and preparation method thereof |
| CN103588216A (en) * | 2013-10-23 | 2014-02-19 | 航天材料及工艺研究所 | Method for preparing zirconium boride powder at low temperature according to boron/carbon thermal reduction method |
| CN103864405A (en) * | 2014-03-26 | 2014-06-18 | 山东理工大学 | Preparation process of rod-shaped zirconium boride powder, |
Non-Patent Citations (1)
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