CN110952071A - Process for preparing diamond nano coating - Google Patents
Process for preparing diamond nano coating Download PDFInfo
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- CN110952071A CN110952071A CN201911327418.2A CN201911327418A CN110952071A CN 110952071 A CN110952071 A CN 110952071A CN 201911327418 A CN201911327418 A CN 201911327418A CN 110952071 A CN110952071 A CN 110952071A
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- inner hole
- diamond
- coating
- hole
- tantalum wire
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
- C23C16/27—Diamond only
- C23C16/271—Diamond only using hot filaments
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0227—Pretreatment of the material to be coated by cleaning or etching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0254—Physical treatment to alter the texture of the surface, e.g. scratching or polishing
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention relates to the field of diamond coatings, in particular to a process for preparing a diamond nano coating. Polishing an inner hole of a painting mold, performing strong alkali and strong acid treatment on the painting mold after polishing, placing the painting mold without cobalt metal into coating equipment, introducing hydrogen and methane into the coating equipment, and enabling a tantalum wire to penetrate through the inner hole and be positioned at the axis of the inner hole; and heating the tantalum wire by the coating equipment, and taking the painting mold out of the coating equipment when the painting mold is cooled to room temperature to finish coating the inner hole. And polishing the hole wall of the inner hole after coating. The tantalum wire is positioned at the center line of the hole, and carbon decomposed from methane can be uniformly distributed on the inner wall of the hole by heating the tantalum wire. The glossiness of the mould can be further improved by polishing after the diamond coating is coated.
Description
Technical Field
The invention relates to the field of diamond coatings, in particular to a process for preparing a diamond nano coating.
Background
Diamond has high hardness, wear resistance, high thermal conductivity and chemical stability, and is considered to be an ideal coating material for cutting tools and mechanical elements, wherein in the wire drawing process, the diamond coating deposited in a wire drawing die can prolong the service life of the painting die and improve the surface quality of insulating paint on the surface of a wire rod, thereby greatly improving the production efficiency and reducing the production cost. The methods for growing diamond coatings are many, and mainly include hot filament chemical vapor deposition, plasma chemical vapor deposition, physical vapor deposition and the like.
The high-end electromagnetic wire has very high requirements on the performances of voltage resistance, paint layer adhesion, winding, pinholes and the like, the surface roughness of a mold needing painting is low, the hole pattern size of the mold is more stable and consistent, the uniform and consistent painting thickness of each pass is ensured, and the surface of the paint layer is complete and has no damage mark.
The wear resistance of the inner hole coating of the existing painting mold is low, the surface roughness is high, the phenomena that the specification is enlarged, grooves are generated on the surface of a mold hole, the ovality is large and the like exist in the mold used for a long time, paint tumors, paint deviation, uneven paint layers and unqualified paint film thickness easily appear in the painting process of the electromagnetic wire, the consistency and the stability of the electrical and mechanical properties of the electromagnetic wire are hindered, and the product quality of enterprises is seriously influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a process for preparing a diamond nano coating, which can improve the wear resistance of a painting die and the glossiness of an inner hole of the painting die, thereby improving the quality of a processed electromagnetic wire.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for preparing a diamond nanocoating, comprising the steps of:
s1, polishing the inner hole of the painting mold to reduce the roughness of the hole wall of the inner hole;
s2, carrying out strong base and strong acid treatment on the polished painting mold to remove cobalt metal doped on the hole wall of the inner hole;
s3, placing the paint coating die without the cobalt metal into coating equipment, and introducing hydrogen and methane into the coating equipment, wherein the volume ratio of the hydrogen to the methane is 28-32: 1; the tantalum wire penetrates through the inner hole, and the tantalum wire is located at the axis of the inner hole; the coating equipment heats the tantalum wire until the set time is reached, the carbon is decomposed from the methane under the action of the tantalum wire and coated on the hole wall of the inner hole to form a diamond nano coating, and then the coating equipment is closed to finish the operation of coating the inner hole (10);
s4, when the painting mold is cooled to the room temperature, taking the painting mold out of the coating equipment;
and S5, polishing the hole wall of the inner hole after coating.
Further, the step S1 of polishing the inner hole of the painting mold includes the following steps:
putting diamond micro powder solution into the inner hole, enabling the steel needle to extend into the diamond micro powder solution, conducting ultrasonic waves to the diamond micro powder solution through the steel needle by an ultrasonic transmitter, and enabling the diamond micro powder solution to impact the hole wall of the inner hole to polish the inner hole.
More preferably, the concentration of the diamond fine powder solution is 35%, and the particle size of the diamond fine powder solution is 1 to 2.5 μm.
Further, the specific steps of the strong alkali and strong acid treatment in step S2 are as follows:
s20, treating the hole wall of the inner hole by strong alkali for 27-33 min;
and S21, treating the hole wall of the inner hole by strong acid for 4-6 min.
Further preferably, the strong base is added H2O2KOH of (2); the strong acid is concentrated hydrochloric acid.
Further, the specific steps of step S3 are as follows:
s30, fixing the cobalt metal-removed painting mold to a fastener, fixing a tantalum wire to the top of the fastener, and arranging the tantalum wire along the axis of the inner hole;
s31, placing the fastener carrying the painting mold into a coating device;
s32, vacuumizing the coating equipment, wherein the vacuum degree is less than or equal to 0.05 Mpa;
s33, firstly introducing hydrogen to exhaust air in the coating equipment, and then introducing mixed gas of methane and hydrogen into the coating equipment;
s34, heating the tantalum wire by coating equipment at 2000-2200 ℃ for 2.7-3.3 h, wherein carbon decomposed from methane is micron-sized and is coated on the hole wall of the inner hole;
and S35, increasing the heating temperature to ensure that the temperature of the tantalum wire is 2200-2400 ℃ and the time is 1.7-2.3 h, and at the moment, the carbon coated on the hole wall of the inner hole is in a nanometer level.
Further, the step S5 of polishing the hole wall of the coated inner hole includes the following specific steps:
putting diamond micro powder solution into the inner hole, extending a steel needle into the diamond micro powder solution, wherein the concentration of the diamond micro powder solution is 30 percent, the granularity of the diamond micro powder solution is 45-55 nm, and conducting ultrasonic waves to the diamond micro powder solution by an ultrasonic transmitter through the steel needle to enable the diamond micro powder solution to impact the hole wall of the inner hole.
Preferably, the inner hole is sequentially provided with an introduction area, a compact area and a forming area from top to bottom, and the hole diameters of the introduction area, the compact area and the forming area are sequentially reduced; the needle point of the steel needle is in an angle shape, and the angle of the position of the steel needle corresponding to each area of the inner hole is 20 degrees larger than that of the area.
Preferably, the inner hole is sequentially provided with an introduction area, a compact area and a forming area from top to bottom, and the hole diameters of the introduction area, the compact area and the forming area are sequentially reduced; the tip of the steel needle is in an angular shape, and the angle of the tip of the steel needle is 20 degrees larger than that of the leading-in area.
The invention has the following beneficial effects:
(1) firstly, polishing the inner hole of the die to improve the glossiness of the inner hole, so that the inner hole coated with the diamond can keep a certain glossiness. The cobalt metal can be removed by treating the mold with a strong base and a strong acid. The tantalum wire is positioned at the center line of the hole, and carbon decomposed from methane can be uniformly distributed on the inner wall of the hole by heating the tantalum wire. The glossiness of the mould can be further improved by polishing after the diamond coating is coated.
(2) The ratio of hydrogen gas volume to methane volume was 30: 1, can provide sufficient gas protection under the proportion, and ensure the uniform and stable growth of the plating layer.
(3) The tantalum wire is heated at different temperatures, a micron coating is firstly built, then a nanometer coating is built, the wear resistance of the micron coating is better, the glossiness of the nanometer coating is better, a die is wear-resistant and has good glossiness dual performance, if only one temperature is used for heating once, only one micron coating or nanometer coating can be generated, and the die is either wear-resistant and not good in glossiness or good in glossiness and not wear-resistant.
(4) The tantalum wire is used as a medium for decomposing methane, does not deform and droop for a long time under the condition of high temperature, can be stably positioned in the center of a die hole and can continuously decompose methane.
(5) The tantalum wire and the die are fixed by the fasteners, so that the tantalum wire is always positioned at the center line of the hole, and carbon decomposed by methane is uniformly distributed on the inner hole.
Drawings
FIG. 1 is a block diagram of a painting mold of the present invention;
FIG. 2 is a view showing the state of the invention in which the painting mold is fixed to the fastener.
The notations in the figures have the following meanings:
1-painting mold 10-inner hole 11-diamond nano coating 12-forming area 13-compact area 14-leading-in area 2-fastening piece 20-base 21-support 22-fastening base 3-tantalum wire
Detailed Description
The technical scheme of the invention is clearly and completely described below by combining the embodiment and the attached drawings of the specification. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A process for preparing a diamond nanocoating, comprising the steps of:
and S1, polishing the inner hole 10 of the painting mold 1 to reduce the roughness of the hole wall of the inner hole 10.
Putting diamond micropowder solution into the inner hole 10, extending the steel needle into the diamond micropowder solution, conducting ultrasonic waves to the diamond micropowder solution by an ultrasonic transmitter through the steel needle, and impacting the wall of the inner hole 10 by the diamond micropowder solution to polish the inner hole 10.
As shown in fig. 1, the inner hole 10 is sequentially provided with a lead-in area 14, a compact area 13 and a forming area 12 from top to bottom, and the hole diameters of the lead-in area 14, the compact area 13 and the forming area 12 are sequentially reduced; the needle point of the steel needle is in an angle shape, and the angle of the position of the steel needle corresponding to each area of the inner hole 10 is 20 degrees larger than that of the area.
A150W ultrasonic emission machine is adopted for processing, diamond micropowder solution with the concentration of 35% and the granularity of 2 microns is added into the inner hole 10, a 45# steel needle with a certain angle (the angle of the needle point is 2 degrees larger than that of each region of the inner hole of the base body) is inserted into the inner hole 10 to conduct ultrasonic waves to the inner hole 10, the diamond micropowder moves at high speed due to ultrasonic vibration and impacts the wall surface of the inner hole 10 of the base body, and the surface roughness of the inner hole 10 of the base body is ground to achieve brightness.
And S2, carrying out strong alkali and strong acid treatment on the polished painting mould 1 to remove the cobalt metal doped on the hole wall of the inner hole 10.
By addition of H2O2Treating the hole wall of the inner hole 10 by using KOH for 30 min;
and (3) treating the hole wall of the inner hole 10 by concentrated hydrochloric acid for 5min, and removing residual cobalt metal and KOH.
S3, placing the paint coating mold 1 with the cobalt metal removed into a coating device, and introducing hydrogen and methane into the coating device, wherein the volume ratio of the hydrogen to the methane is 30: 1; the tantalum wire 3 penetrates through the inner hole 10, and the tantalum wire 3 is located at the axis of the inner hole 10; the coating equipment heats the tantalum wire 3 until the set time is reached, carbon is decomposed from methane under the action of the tantalum wire 3 and is coated on the hole wall of the inner hole 10 to form a diamond nano coating 11, then the coating equipment is closed, and the operation of coating the inner hole (10) is completed, and the specific steps are as follows:
s30, the cobalt metal removed painted mold 1 is fixed to the fastener 2, the tantalum wire 3 is fixed to the top of the fastener 2, and the tantalum wire 3 is disposed along the axis of the bore 10.
As shown in fig. 2, the painting mold 1 is placed inside the fastening piece 2, three fastening bases 22 are arranged below the painting mold 1, the three fastening bases 22 are equal in height, the painting mold 1 is fixed through the fastening bases 22, the tantalum wire 3 penetrates through the inner hole 10, the tantalum wire 3 is located in the center of the inner hole 10, the tantalum wire 3 is straightened, and two ends of the tantalum wire 3 are fixed on the brackets 21 on the top of the base 20. In this example, the tantalum wire 3 was heat resistant up to 3000 ℃.
S31, placing the fastener 2 carrying the painting mold 1 into a coating device;
s32, vacuumizing the coating equipment, wherein the vacuum degree is less than or equal to 0.05 Mpa;
and S33, firstly introducing hydrogen to exhaust the air in the coating equipment, and then introducing the mixed gas of methane and hydrogen into the coating equipment.
S34, the tantalum wire 3 is heated by the coating equipment at 2100 ℃ for 3h, and carbon decomposed from methane is micron-sized and coated on the hole wall of the inner hole 10.
The power of the coating equipment is set to be 10kw, and the granularity of the coating is micron-sized at the moment, so that the coating has high hardness, good wear resistance and strong bonding capability with a substrate.
And S35, increasing the heating temperature to 2300 ℃ for 2h, wherein the carbon coated on the hole wall of the inner hole 10 is in a nanometer level.
And then the power of the coating equipment is increased to 15kw, the granularity of the coating is nano-scale, and the fine gloss of the coating is higher.
S4, when the painting mold 1 is cooled to room temperature, the painting mold 1 is taken out of the coating equipment, and the coating of the inner hole 10 is completed;
s5, polishing the coated hole wall of the inner hole 10.
Putting diamond micro powder solution into the inner hole 10, extending a steel needle into the diamond micro powder solution, wherein the concentration of the diamond micro powder solution is 30%, the granularity of the diamond micro powder solution is 50nm, conducting ultrasonic waves to the diamond micro powder solution through the steel needle by an ultrasonic transmitter, and impacting the diamond micro powder solution on the hole wall of the inner hole 10.
The tip of the steel needle is angled, the angle of the tip being 20 degrees greater than the angle of the lead-in zone 14.
Example 2
On the basis of example 1, the inner bore 10 of the painting mold 1 is subjected to a polishing process for reducing the roughness of the bore wall of the inner bore 10 in step S1. A diamond micropowder solution having a particle size of 1 μm and a concentration of 35% was added to the inner hole 10.
In step S2, the paint coating mold 1 after polishing is treated with strong alkali and strong acid to remove cobalt metal doped on the hole wall of the inner hole 10, and the specific steps are as follows:
by addition of H2O2Treating the hole wall of the inner hole 10 by using KOH for 27 min;
the hole wall of the inner hole 10 is treated by concentrated hydrochloric acid for 4 min.
The ratio of the volume of hydrogen to the volume of methane in step S3 is 28: 1,
in step S34, the coating device heats the tantalum wire 3 at 2000 ℃ for 2.7 h.
In step S35, the heating temperature is increased to 2200 ℃ for 1.7 h.
In step S5, the hole wall of the coated inner hole 10 is polished, the concentration of the diamond micro powder solution is 30%, and the particle size of the diamond micro powder solution is 45 nm.
Example 3
On the basis of example 1, the inner bore 10 of the painting mold 1 is subjected to a polishing process for reducing the roughness of the bore wall of the inner bore 10 in step S1. A diamond micropowder solution having a particle size of 2.5 μm with a concentration of 35% was added to the inner bore 10.
In step S2, the paint coating mold 1 after polishing is treated with strong alkali and strong acid to remove cobalt metal doped on the hole wall of the inner hole 10, and the specific steps are as follows:
by addition of H2O2KOH treatment of the bore wall of the bore 10The time is 33 min;
the hole wall of the inner hole 10 is treated by concentrated hydrochloric acid for 6 min.
The ratio of the hydrogen volume to the methane volume in step S3 is 32: 1.
in step S34, the coating apparatus heats the tantalum wire 3 at 2200 ℃ for 3.3 hours.
In step S35, the heating temperature is increased to 2400 ℃ for 2.3 hours.
The hole wall of the inner hole 10 after coating is subjected to polishing treatment in step S5. The concentration of the diamond micropowder solution was 30%, and the particle size of the diamond micropowder solution was 55 nm.
Claims (9)
1. A process for preparing a diamond nanocoating, comprising the steps of:
s1, polishing the inner hole (10) of the painting mold (1) to reduce the roughness of the hole wall of the inner hole (10);
s2, carrying out strong base and strong acid treatment on the paint coating mould (1) after polishing treatment to remove cobalt metal doped on the hole wall of the inner hole (10);
s3, placing the paint coating die (1) with the cobalt metal removed into coating equipment, and introducing hydrogen and methane into the coating equipment, wherein the volume ratio of the hydrogen to the methane is 28-32: 1; the tantalum wire (3) penetrates through the inner hole (10), and the tantalum wire (3) is located at the axis of the inner hole (10); the coating equipment heats the tantalum wire (3) until a set time is reached, the methane is decomposed into carbon under the action of the tantalum wire (3) and coated on the hole wall of the inner hole (10) to form a diamond nano coating (11), and then the coating equipment is closed to finish the coating operation on the inner hole (10);
s4, when the painting mold (1) is cooled to the room temperature, taking the painting mold (1) out of the coating equipment;
and S5, polishing the hole wall of the inner hole (10) after coating.
2. The process for preparing a diamond nanocoating according to claim 1, wherein the polishing process of the inner bore (10) of the painting mold (1) in step S1 comprises the following specific steps:
putting diamond micro powder solution into the inner hole (10), enabling the steel needle to extend into the diamond micro powder solution, conducting ultrasonic waves to the diamond micro powder solution through the steel needle by an ultrasonic transmitter, and enabling the diamond micro powder solution to impact the hole wall of the inner hole (10) to polish the inner hole (10).
3. The process for preparing a diamond nanocoating according to claim 2, wherein the concentration of the diamond micropowder solution is 35%, and the particle size of the diamond micropowder solution is 1 μm to 2.5 μm.
4. The tool for preparing a diamond nanocoating according to claim 1, wherein the specific step of performing the strong alkali and strong acid treatment in step S2 is as follows:
s20, treating the hole wall of the inner hole (10) by strong alkali for 27-33 min;
s21, treating the hole wall of the inner hole (10) by strong acid for 4-6 min.
5. The process for preparing a diamond nanocoating according to claim 4, wherein: strong alkali is added H2O2KOH of (2); the strong acid is concentrated hydrochloric acid.
6. The process for preparing a diamond nanocoating according to claim 1, 2, 3, 4 or 5, wherein the specific steps of step S3 are as follows:
s30, fixing the cobalt metal-removed painting mold (1) to the fastener (2), fixing the tantalum wire (3) to the top of the fastener (2), and arranging the tantalum wire (3) along the axis of the inner hole (10);
s31, placing the fastener (2) carrying the painting mold (1) into a coating device;
s32, vacuumizing the coating equipment, wherein the vacuum degree is less than or equal to 0.05 Mpa;
s33, firstly introducing hydrogen to exhaust air in the coating equipment, and then introducing mixed gas of methane and hydrogen into the coating equipment;
s34, heating the tantalum wire (3) by coating equipment at 2000-2200 ℃ for 2.7-3.3 h, wherein carbon decomposed from methane is micron-sized and is coated on the hole wall of the inner hole (10);
and S35, increasing the heating temperature to ensure that the temperature of the tantalum wire (3) is 2200-2400 ℃ and the time is 1.7-2.3 h, and at the moment, the carbon coated on the hole wall of the inner hole (10) is in a nanometer level.
7. The process for preparing a diamond nanocoating according to claim 1, wherein the step of polishing the wall of the inner hole (10) after coating in step S5 comprises the following specific steps:
putting diamond micro powder solution into the inner hole (10), extending a steel needle into the diamond micro powder solution, wherein the concentration of the diamond micro powder solution is 30%, the granularity of the diamond micro powder solution is 45-55 nm, conducting ultrasonic waves to the diamond micro powder solution through the steel needle by an ultrasonic transmitter, and impacting the diamond micro powder solution on the hole wall of the inner hole (10).
8. The process for preparing a diamond nanocoating according to claim 2, wherein: the inner hole (10) is sequentially provided with an introduction area (14), a compact area (13) and a forming area (12) from top to bottom, and the pore diameters of the introduction area (14), the compact area (13) and the forming area (12) are sequentially reduced; the needle point of the steel needle is in an angle shape, and the angle of the position of the steel needle corresponding to each area of the inner hole (10) is 2 degrees larger than that of the area.
9. The process for preparing a diamond nanocoating according to claim 7, wherein: the inner hole (10) is sequentially provided with an introduction area (14), a compact area (13) and a forming area (12) from top to bottom, and the pore diameters of the introduction area (14), the compact area (13) and the forming area (12) are sequentially reduced; the tip of the steel needle is angular, and the angle of the tip is 2 degrees larger than that of the leading-in area (14).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126911A (en) * | 2020-09-30 | 2020-12-25 | 久钻科技(成都)有限公司 | High-performance diamond coating water jet cutting sand pipe and preparation method and preparation tool thereof |
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| US5186973A (en) * | 1990-09-13 | 1993-02-16 | Diamonex, Incorporated | HFCVD method for producing thick, adherent and coherent polycrystalline diamonds films |
| CN1211635A (en) * | 1998-06-12 | 1999-03-24 | 上海交通大学 | Diamond-coated wire-drawing die |
| CN1327084A (en) * | 2001-05-31 | 2001-12-19 | 上海交通大学 | Method for preparing wire drawing mold with diamond compoiste coating |
| CN101280423A (en) * | 2008-04-02 | 2008-10-08 | 中国工程物理研究院总体工程研究所 | Manufacturing method of small aperture diamond coating drawing die |
| CN110468385A (en) * | 2018-05-11 | 2019-11-19 | 深圳先进技术研究院 | Micro-Nano Diamond Com-posite coating, preparation method and application, cold extruding mold and punching head and mold |
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2019
- 2019-12-20 CN CN201911327418.2A patent/CN110952071A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186973A (en) * | 1990-09-13 | 1993-02-16 | Diamonex, Incorporated | HFCVD method for producing thick, adherent and coherent polycrystalline diamonds films |
| CN1211635A (en) * | 1998-06-12 | 1999-03-24 | 上海交通大学 | Diamond-coated wire-drawing die |
| CN1327084A (en) * | 2001-05-31 | 2001-12-19 | 上海交通大学 | Method for preparing wire drawing mold with diamond compoiste coating |
| CN101280423A (en) * | 2008-04-02 | 2008-10-08 | 中国工程物理研究院总体工程研究所 | Manufacturing method of small aperture diamond coating drawing die |
| CN110468385A (en) * | 2018-05-11 | 2019-11-19 | 深圳先进技术研究院 | Micro-Nano Diamond Com-posite coating, preparation method and application, cold extruding mold and punching head and mold |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126911A (en) * | 2020-09-30 | 2020-12-25 | 久钻科技(成都)有限公司 | High-performance diamond coating water jet cutting sand pipe and preparation method and preparation tool thereof |
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