CN103752219A - Manufacturing method of boron carbide firearm nozzle - Google Patents
Manufacturing method of boron carbide firearm nozzle Download PDFInfo
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- CN103752219A CN103752219A CN201310546056.2A CN201310546056A CN103752219A CN 103752219 A CN103752219 A CN 103752219A CN 201310546056 A CN201310546056 A CN 201310546056A CN 103752219 A CN103752219 A CN 103752219A
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- boron carbide
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Abstract
The invention discloses a manufacturing method of a boron carbide firearm nozzle. The method includes the preparation of boron carbide, and the preparation of boron carbide comprises the following steps: (1) the purification and dispersion of carbon nanotubes; (2) preparation of raw materials for synthesis; (3) chemical reactions and heat treatment of raw materials; (4) super-high pressure synthesis; and (5) residual stress elimination. According to the manufacturing method, the firearm nozzle with high heat stability and high hardness can be prepared.
Description
Technical field
The present invention relates to a kind of manufacture method of firearms nozzle.
Background technology
Boron carbide (boron carbide), has another name called boron carbide, and molecular formula is B
4c, is generally dark gray powder.Boron carbide is commonly called as diamond, its relative density 2.52, and 2350 ℃ of fusing points, 3500 ℃ of boiling point >, microhardness >=3500kgf/mm2, bending strength >=400Mpa, is a kind of very boride of high rigidity that has.With acid, aqueous slkali Fails To Respond, easily manufacture and price are relatively cheap.Be widely used in grinding, grinding, boring and the polishing of hard material, the manufacture of metal boride and smelting boron sodium, boron alloy and special welding etc.
Boron carbide has high chemical potential, neutron-absorbing, wear-resisting and semiconductor electric conductivity.Be to one of the most stable material of acid, in all dense or rare acid or aqueous alkali, all stablize.
Because the hardness of boron carbide is high, high temperature resistant, in munitions industry, can be used as manufacturing firearms nozzle.The boron carbide material that how to synthesize excellent performance is that those skilled in the art endeavour the problem solving always.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of boron carbide firearms nozzle, and it has good resistance to elevated temperatures and very high hardness.
In order to solve the problems of the technologies described above, the manufacture method of firearms nozzle provided by the invention comprises prepares boron carbide, wherein prepares boron carbide and comprises the steps:
(1) purifying of CNT and dispersion treatment:
The CNT of many walls or single wall adopts acetone soaking and washing, and purifying process, as conventional method, is then positioned over CNT in mixed solution and carries out supersonic oscillations dispersion, finally puts into drying in oven;
(2) synthesis material is prepared:
Synthesis material formula: the CNT after mass fraction 0.5～5% disperses, the boron oxide of its twice as high molar ratio, bonding agent is 18～22%, surplus is the diadust of particle size range 5 μ m～20 μ m, hard alloy substrate; Before using, diadust carries out surface cleaning processing and pre-graphitization, and hard alloy substrate and bonding agent carry out surface cleaning processing; Other auxiliary material that use carry out corresponding cleaning treatment; Pyrophyllite block before assembling, pyrophillite ring must be removed moisture; By diadust, bonding agent, CNT and boron oxide compound, first use absolute ethyl alcohol wet mixing, after oven dry, be dry mixed and make mixed material;
(3) chemical reaction of raw material and heat treatment:
Mixed material is heated to 800～900 ℃, and the time is 0.5～1.5h; Then reacted raw material is placed on to temperature and is in the baking oven of 80～100 ℃ and save backup;
(4) super-pressure is synthetic:
To synthesize piece and be positioned in pyrophyllite block mould, at additional pyrophillite ring, conducting steel ring and the catalyst sheet loaded onto of mould, in cubic hinge press, carry out high pressure high temperature compound experiment; Synthesis technologic parameter is: 1450～1600 ℃ of sintering temperatures, and sintering pressure 5～6GPa, the heat-insulation pressure keeping time is 3～5 minutes;
(5) residual stress is eliminated:
After synthesizing, product carries out vacuum aging annealing.
Described mixed solution is in 200ml absolute ethyl alcohol+0.1～1.0g lauryl sodium sulfate mixed solution.
Described cubic hinge press is hinge type cubic hinge press, the synthetic middle liquid phase pressure transmission mode that adopts.
Described hard alloy substrate and the surface cleaning of bonding agent are processed and are referred to: first in connection with surface, carry out sanding and polishing processing, erase oxide layer and the hole of mating surface, until expose unsalted surface, then deoil, washing, Ultrasonic Cleaning, infrared drying, finally pack in clean vessel standby.
Described bonding agent is cobalt sheet and titanium sheet.
The present invention, by above-mentioned manufacture method, has prepared a kind of boron carbide with high thermal stability and high rigidity, and then the firearms nozzle of processability excellence.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1:
The preparation method who is used to form the boron carbide of firearms nozzle comprises the steps:
(1) purifying of CNT and dispersion treatment
The CNT of many walls or single wall adopts acetone soaking and washing, purifying process is as conventional method, then CNT is positioned in 200ml absolute ethyl alcohol+0.5g lauryl sodium sulfate mixed solution, carries out supersonic oscillations dispersion, finally put into drying in oven;
(2) synthesis material is prepared
Synthesis material formula: the CNT after mass fraction 0.5% disperses, the boron oxide of its twice as high molar ratio, the diadust of particle size range 5～10 μ m, bonding agent is 22%, hard alloy substrate; Before using, diadust must carry out surface cleaning processing and pre-graphitization, hard alloy substrate, cobalt sheet, titanium sheet raw and auxiliary material, first in connection with surface, carry out sanding and polishing processing, erase oxide layer and the hole of mating surface, until expose unsalted surface, then deoil, washing, Ultrasonic Cleaning, infrared drying, finally pack in clean vessel standby; Other auxiliary material that use also should carry out corresponding cleaning treatment; Pyrophyllite block before assembling, pyrophillite ring must first carry out calcination process, to remove the moisture in pyrophillite; By diadust, bonding agent, CNT and boron oxide compound, first use absolute ethyl alcohol wet mixing, after oven dry, be dry mixed, preserve mixed material;
(3) chemical reaction of raw material and heat treatment
Mixed material is heated to 850 ℃, and time 1.5h, is then placed on reacted raw material in baking oven and saves backup, and oven temperature is 80 ℃;
(4) super-pressure is synthetic
To synthesize piece and be positioned in pyrophyllite block mould, at additional pyrophillite ring, conducting steel ring and the catalyst sheet loaded onto of mould, in hinge type cubic hinge press, carry out high pressure high temperature compound experiment; In synthetic, adopt liquid phase pressure transmission mode, synthesis technologic parameter is: 1600 degrees Celsius of sintering temperatures, and sintering pressure 5GPa, the heat-insulation pressure keeping time is 3 minutes;
(5) residual stress is eliminated
After synthesizing, product carries out vacuum aging annealing.
Sample effect: the wear resistance ratio that utilizes grinding silicon carbide grinding wheel method to measure boron carbide is about 2.70461 * 105; Utilize the toughness of tension weight churning method test, single strike work 1.4J, sample average number of shocks is 13 times.
Embodiment 2:
The preparation method who is used to form the boron carbide of firearms nozzle comprises the steps:
(1) purifying of CNT and dispersion treatment
The CNT of many walls or single wall adopts acetone soaking and washing, purifying process is as conventional method, then CNT is positioned in 200ml absolute ethyl alcohol+0.1g lauryl sodium sulfate mixed solution, carries out supersonic oscillations dispersion, finally put into drying in oven;
(2) synthesis material is prepared
Synthesis material formula: the CNT after mass fraction 1% disperses, the boron oxide of its twice as high molar ratio, the diadust of particle size range 15～20 μ m, bonding agent is 20%, hard alloy substrate; Before using, diadust must carry out surface cleaning processing and pre-graphitization, hard alloy substrate, cobalt sheet, titanium sheet raw and auxiliary material, first in connection with surface, carry out sanding and polishing processing, erase oxide layer and the hole of mating surface, until expose unsalted surface, then deoil, washing, Ultrasonic Cleaning, infrared drying, finally pack in clean vessel standby; Other auxiliary material that use also should carry out corresponding cleaning treatment; Pyrophyllite block before assembling, pyrophillite ring must first carry out calcination process, to remove the moisture in pyrophillite; By diadust, bonding agent, CNT and boron oxide compound, first use absolute ethyl alcohol wet mixing, after oven dry, be dry mixed, preserve mixed material;
(3) chemical reaction of raw material and heat treatment
Mixed material is heated to 800～900 ℃, and time 1h, is then placed on reacted raw material in baking oven and saves backup, and oven temperature is 90 ℃;
(4) super-pressure is synthetic
To synthesize piece and be positioned in pyrophyllite block mould, at additional pyrophillite ring, conducting steel ring and the catalyst sheet loaded onto of mould, in hinge type cubic hinge press, carry out high pressure high temperature compound experiment; In synthetic, adopt liquid phase pressure transmission mode, synthesis technologic parameter is: 1500 ℃ of sintering temperatures, and sintering pressure 5.5GPa, the heat-insulation pressure keeping time is 5 minutes;
(5) residual stress is eliminated
After synthesizing, product carries out vacuum aging annealing.
Sample effect: the wear resistance ratio that utilizes grinding silicon carbide grinding wheel method to measure boron carbide is about 2.70461 * 105; Utilize the toughness of tension weight churning method test, single strike work 1.4J, sample average number of shocks is 14 times.
Embodiment 3:
The preparation method who is used to form the boron carbide of firearms nozzle comprises the steps:
(1) purifying of CNT and dispersion treatment
The CNT of many walls or single wall adopts acetone soaking and washing, purifying process is as conventional method, then CNT is positioned in 200ml absolute ethyl alcohol+1.0g lauryl sodium sulfate mixed solution, carries out supersonic oscillations dispersion, finally put into drying in oven;
(2) synthesis material is prepared
Synthesis material formula: the CNT after mass fraction 5% disperses, the boron oxide of its twice as high molar ratio, the diadust of particle size range 10～20 μ m, bonding agent is 18%, hard alloy substrate; Before using, diadust must carry out surface cleaning processing and pre-graphitization, hard alloy substrate, cobalt sheet, titanium sheet raw and auxiliary material, first in connection with surface, carry out sanding and polishing processing, erase oxide layer and the hole of mating surface, until expose unsalted surface, then deoil, washing, Ultrasonic Cleaning, infrared drying, finally pack in clean vessel standby; Other auxiliary material that use also should carry out corresponding cleaning treatment; Pyrophyllite block before assembling, pyrophillite ring must first carry out calcination process, to remove the moisture in pyrophillite; By diadust, bonding agent, CNT and boron oxide compound, first use absolute ethyl alcohol wet mixing, after oven dry, be dry mixed, preserve mixed material;
(3) chemical reaction of raw material and heat treatment
Mixed material is heated to 800～900 ℃, and 0.5h, is then placed on reacted raw material in baking oven and saves backup, and oven temperature is 100 ℃;
(4) super-pressure is synthetic
To synthesize piece and be positioned in pyrophyllite block mould, at additional pyrophillite ring, conducting steel ring and the catalyst sheet loaded onto of mould, in hinge type cubic hinge press, carry out high pressure high temperature compound experiment; In synthetic, adopt liquid phase pressure transmission mode, synthesis technologic parameter is: 1550 ℃ of sintering temperatures, and sintering pressure 6GPa, the heat-insulation pressure keeping time is 4 minutes;
(5) residual stress is eliminated
After synthesizing, product carries out vacuum aging annealing.
Sample effect: the wear resistance ratio that utilizes grinding silicon carbide grinding wheel method to measure boron carbide is about 2.70461 * 105; Utilize the toughness of tension weight churning method test, single strike work 1.4J, average number of shocks is 34 times.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (5)
1. a manufacture method for boron carbide firearms nozzle, comprises and prepares boron carbide, it is characterized in that, prepares boron carbide and comprises the steps:
(1) purifying of CNT and dispersion treatment:
The CNT of many walls or single wall adopts acetone soaking and washing, and purifying process, as conventional method, is then positioned over CNT in mixed solution and carries out supersonic oscillations dispersion, finally puts into drying in oven;
(2) synthesis material is prepared:
Synthesis material formula: the CNT after mass fraction 0.5～5% disperses, the boron oxide of its twice as high molar ratio, bonding agent is 18～22%, surplus is the diadust of particle size range 5 μ m～20 μ m, hard alloy substrate; Before using, diadust carries out surface cleaning processing and pre-graphitization, and hard alloy substrate and bonding agent carry out surface cleaning processing; Other auxiliary material that use carry out corresponding cleaning treatment; Pyrophyllite block before assembling, pyrophillite ring must be removed moisture; By diadust, bonding agent, CNT and boron oxide compound, first use absolute ethyl alcohol wet mixing, after oven dry, be dry mixed and make mixed material;
(3) chemical reaction of raw material and heat treatment:
Mixed material is heated to 850 ℃, and the time is 0.5～1.5h; Then reacted raw material is placed on to temperature and is in the baking oven of 80～100 ℃ and save backup;
(4) super-pressure is synthetic:
To synthesize piece and be positioned in pyrophyllite block mould, at additional pyrophillite ring, conducting steel ring and the catalyst sheet loaded onto of mould, in cubic hinge press, carry out high pressure high temperature compound experiment; Synthesis technologic parameter is: 1600 ℃ of sintering temperatures, and sintering pressure 5～6GPa, the heat-insulation pressure keeping time is 3～5 minutes;
(5) residual stress is eliminated:
After synthesizing, product carries out vacuum aging annealing.
2. the manufacture method of boron carbide firearms nozzle according to claim 1, is characterized in that: described mixed solution is in 200ml absolute ethyl alcohol+0.1～1.0g lauryl sodium sulfate mixed solution.
3. the manufacture method of boron carbide firearms nozzle according to claim 1, is characterized in that: described cubic hinge press is hinge type cubic hinge press, the synthetic middle liquid phase pressure transmission mode that adopts.
4. the manufacture method of boron carbide firearms nozzle according to claim 1 and 2, it is characterized in that: described hard alloy substrate and the surface cleaning of bonding agent are processed and referred to: first in connection with surface, carry out sanding and polishing processing, erase oxide layer and the hole of mating surface, until expose unsalted surface, then deoil, washing, Ultrasonic Cleaning, infrared drying, finally pack in clean vessel standby.
5. the manufacture method of boron carbide firearms nozzle according to claim 1, is characterized in that: described bonding agent is cobalt sheet and titanium sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310546056.2A CN103752219A (en) | 2013-11-06 | 2013-11-06 | Manufacturing method of boron carbide firearm nozzle |
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| CN201310546056.2A CN103752219A (en) | 2013-11-06 | 2013-11-06 | Manufacturing method of boron carbide firearm nozzle |
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| CN103752219A true CN103752219A (en) | 2014-04-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387072A (en) * | 2014-10-29 | 2015-03-04 | 安徽省皖捷液压科技有限公司 | High-performance boron carbide ceramic nozzle and fabrication method thereof |
| CN104402440A (en) * | 2014-10-27 | 2015-03-11 | 安徽锐视光电技术有限公司 | Polyphenylene sulfide/boron carbide compounded ceramic nozzle and making method thereof |
Citations (4)
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|---|---|---|---|---|
| US20090092532A1 (en) * | 2007-10-05 | 2009-04-09 | Konstantinos Kourtakis | Process for preparing boron carbon nanorods |
| CN101648313A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
| CN102268619A (en) * | 2011-06-03 | 2011-12-07 | 中南大学 | Preparation method of carbon-nanotube-reinforced polycrystalline diamond compact (PDC) material |
| CN202640168U (en) * | 2012-05-22 | 2013-01-02 | 无锡市喷特环保工程有限公司 | Novel vertical sandblasting machine |
-
2013
- 2013-11-06 CN CN201310546056.2A patent/CN103752219A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090092532A1 (en) * | 2007-10-05 | 2009-04-09 | Konstantinos Kourtakis | Process for preparing boron carbon nanorods |
| CN101648313A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
| CN102268619A (en) * | 2011-06-03 | 2011-12-07 | 中南大学 | Preparation method of carbon-nanotube-reinforced polycrystalline diamond compact (PDC) material |
| CN202640168U (en) * | 2012-05-22 | 2013-01-02 | 无锡市喷特环保工程有限公司 | Novel vertical sandblasting machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402440A (en) * | 2014-10-27 | 2015-03-11 | 安徽锐视光电技术有限公司 | Polyphenylene sulfide/boron carbide compounded ceramic nozzle and making method thereof |
| CN104387072A (en) * | 2014-10-29 | 2015-03-04 | 安徽省皖捷液压科技有限公司 | High-performance boron carbide ceramic nozzle and fabrication method thereof |
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Application publication date: 20140430 |