CN108127802A - A kind of processing method of large scale polycrystalline diamond article - Google Patents
A kind of processing method of large scale polycrystalline diamond article Download PDFInfo
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- CN108127802A CN108127802A CN201711403906.8A CN201711403906A CN108127802A CN 108127802 A CN108127802 A CN 108127802A CN 201711403906 A CN201711403906 A CN 201711403906A CN 108127802 A CN108127802 A CN 108127802A
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- large scale
- polycrystalline diamond
- processing method
- scale polycrystalline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/04—Diamond
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
- C30B33/02—Heat treatment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention provides a kind of processing methods of large scale polycrystalline diamond article, the processing method of the present invention uses large scale polycrystalline diamond bulk as raw material, after cutting, it sharpens, weld finishing acquisition large scale polycrystalline diamond article, internal stress elimination is carried out after cutting, welding finishing, this method can be used for preparing the products such as ultrahigh precision lathe tool, finishing pen, wire drawing die.Processing method of the present invention is simple, obtains quality of item height, and raw material availability is high, reduces cost.
Description
Technical field
The invention belongs to superhard material products processing technique field, more particularly to a kind of large scale polycrystalline diamond article
Processing method.
Background technology
Polycrystalline diamond be by non-diamond carbonizable substance the high pressure high temperature of 14 ~ 18GPa and 2300 ~ 2600K item
Directly convert and formed under part, with high hardness and wearability, object is mutually single, even structure, crystallite dimension for 10 ~
100nm, Knoop hardness are up to 120 ~ 140GPa, higher than diamond single crystal（100）With（001）The hardness in face（About 115GPa）.It is special
It is not its isotropism, no cleavage surface so as to avoid single-crystal diamond easily along the weakness of cleavage surface brittle fracture, is being cut
Or in grinding process, the nanocrystal being connected each other with unsaturated bond can peel off automatically in due course, continuously emerge new sharp
Microcosmic cutting edge, this self-sharpening ensure that high grinding rate and low cutting force, do not easily cause product surface microscopic damage.
At present, for single-crystal diamond or polycrystalline diamond（PCD）The processing of product is mainly using Laser Processing, electrical fire
Several processes such as yarn cutting, ultrasonic wave processing, high-pressure water jet are cut, and sharpening technique mainly uses ceramic junction
Mixture skive is ground.Since polycrystalline diamond overall performance is better than single-crystal diamond or PCD, with current above-mentioned
Manufacturing process is more difficult to process polycrystalline diamond article, and the process-cycle is longer.
Invention content
The technical issues of polycrystalline diamond article difficulty is high, and the process-cycle is long, this hair are processed to solve existing manufacturing process
It is bright that a kind of processing method of large scale polycrystalline diamond article is provided.The processing method of the present invention uses large scale polycrystalline diamond
Bulk is raw material, after cutting, sharpening, welds finishing acquisition large scale polycrystalline diamond article, is modified in cutting, welding laggard
Row internal stress is eliminated, and this method can be used for preparing the products such as ultrahigh precision lathe tool, finishing pen, wire drawing die.Processing method of the present invention
Simply, it is high to obtain quality of item, raw material availability height reduces cost.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of processing method of large scale polycrystalline diamond article, includes the following steps：
1）Obtain large scale polycrystalline diamond bulk；
2）Cutting：To step 1）The large scale polycrystalline diamond bulk of middle acquisition is cut by laser, and obtains blank；
3）Eliminate internal stress：Normalizing or annealing are carried out to the blank of acquisition, eliminate the internal stress generated in cutting process；
4）Sharpening：Blank is sharpened using cobalt anchoring agent diamond grinding wheel；
5）Welding, finishing：Welded, finishing obtains product；
6）Eliminate internal stress：With the step 3）In elimination internal stress operating procedure it is identical, reduce welding and dressing process in
The internal stress of generation.
Preferably, the step 1）Middle large scale polycrystalline diamond bulk is with non-under 14 ~ 18GPa, 2300 ~ 2600K
Diamond carbon is directly synthesized for raw material.
Preferably, the step 2）In laser cutting picosecond laser cutting machine or femtosecond laser cutting machine may be used.
Preferably, the step 3）The detailed process of middle normalized treatment is：Blank is heated to 200 ~ 400 with 10 DEG C/min
DEG C, 2 ~ 8h is kept the temperature, natural cooling in air after taking-up.
Preferably, the step 3）The detailed process of middle annealing is：Blank is heated to 200 ~ 400 with 10 DEG C/min
DEG C, keep the temperature 2 ~ 8h, the furnace cooling in stove.
Preferably, the step 4）The content of cobalt is 8 ~ 30% in middle cobalt anchoring agent diamond grinding wheel.
Compared with prior art, beneficial effects of the present invention are：
1st, picosecond laser cutting machine or femtosecond laser cutting machine are used in processing method of the present invention to large scale polycrystalline diamond stone
Material is cut, and is improved cutting accuracy, is reduced the loss of cutting process, improve the utilization rate of product.
2nd, double normalizing or annealing are carried out in processing method of the invention, the toughness of product can be improved, eliminated and add
The internal stress formed during work.
3rd, the metal anchoring agent diamond wheel that the present invention selects cobalt content high is sharpened, although hardness, wearability
Not as good as Technique of Vitrified Diamond Wheels, but the temperature generated in grinding process is relied on, the metallic bond in grinding wheel is special
It is that cobalt can make diamond reversionization, so as to fulfill sharpening at a high speed, and cutting edge can be made smooth.
Specific embodiment
The processing method of a kind of large scale polycrystalline diamond article of the present invention, suitable for preparing ultrahigh precision lathe tool, repairing
Lump-sum, wire drawing die etc., specific processing method include the following steps：
1）Obtain large scale polycrystalline diamond bulk；
2）Cutting：To step 1）The large scale polycrystalline diamond bulk of middle acquisition is cut by laser, and obtains blank；
3）Eliminate internal stress：Normalizing or annealing are carried out to the blank of acquisition, eliminate the internal stress generated in cutting process；
4）Sharpening：Blank is sharpened using cobalt anchoring agent diamond grinding wheel；
5）Welding, finishing：Welded, finishing obtains product；
6）Eliminate internal stress：With the step 3）In elimination internal stress operating procedure it is identical, reduce welding and dressing process in
The internal stress of generation.
Wherein, large scale polycrystalline is directly synthetically prepared as raw material using non-diamond carbon under 14 ~ 18GPa, 2300 ~ 2600K
Diamond bulk.
Step 2）In laser cutting picosecond laser cutting machine or femtosecond laser cutting machine may be used.
Step 3）The detailed process of middle normalized treatment is：Blank is heated to 200 ~ 400 DEG C with 10 DEG C/min, heat preservation 2 ~
8h, natural cooling in air after taking-up；
The detailed process of annealing is：Blank is heated to 200 ~ 400 DEG C with 10 DEG C/min, keeps the temperature 2 ~ 8h, in stove with
Furnace cooling is but.
The content of cobalt is 8 ~ 30% in the cobalt anchoring agent diamond grinding wheel, ensures the content of cobalt and can ensure for 8 ~ 30%
In the case of skive intensity, the cobalt contained can be in process with polycrystalline diamond at a high temperature of frictional force
It reacts.
The present invention processes polycrystalline diamond using the skive of high cobalt content, and principle is by grinding wheel and polycrystalline
The frictional force of diamond in process generates certain high temperature, and cobalt can occur anti-with polycrystalline diamond under this temperature condition
Should, so as to substantially reduce processing surface roughness.
The present invention carries out normalizing or annealing after cutting either sharpening, can eliminate the internal stress of product, due to
Polycrystalline diamond hardness is higher than artificial or natural uni-crystal diamond, by the operation for eliminating internal stress, it is possible to reduce product is adding
It cracks during work or use or tipping happens.
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
In the present embodiment, large scale polycrystalline diamond bulk is synthesized under the conditions of 14GPa, 2600K；It is cut using picosecond laser
Machine cuts large scale polycrystalline diamond bulk, obtains the blank of suitable dimension；By blank with 10 DEG C of rates per minute
It is heated to 200 DEG C, keeps the temperature 4 hours, natural cooling in air after taking-up；The blank handled well is sharpened, machining tool
The metal anchoring agent diamond wheel of cobalt content 8% is selected, the polycrystalline diamond article processed is welded, is modified；To be more
Diamond product is heated to 200 DEG C with 10 DEG C of rates per minute, keeps the temperature 6 hours, and natural cooling in air after taking-up disappears
Except the internal stress generated in process.
Embodiment 2
In the present embodiment, large scale polycrystalline diamond bulk is synthesized under the conditions of 16GPa, 2500K；It is cut using femtosecond laser
Machine cuts large scale polycrystalline diamond bulk, obtains the blank of suitable dimension；By blank with 10 DEG C of rates per minute
It is heated to 300 DEG C, keeps the temperature 4 hours, natural cooling in air after taking-up；The blank handled well is sharpened, machining tool
Select the metal anchoring agent diamond wheel of cobalt content 20%；The polycrystalline diamond article processed is welded, is modified；It will
Polycrystalline diamond article is heated to 300 DEG C with 10 DEG C of rates per minute, keeps the temperature 8 hours, natural cooling in air after taking-up,
Eliminate the internal stress generated in process.
Embodiment 3
In the present embodiment, large scale polycrystalline diamond bulk is synthesized under the conditions of 18GPa, 2300K；It is cut using femtosecond laser
Machine cuts large scale polycrystalline diamond bulk, obtains the blank of suitable dimension；By blank with 10 DEG C of rates per minute
400 DEG C are heated to, keeps the temperature 8 hours, the furnace cooling in stove；The blank handled well is sharpened, machining tool selects cobalt
The metal anchoring agent diamond wheel of content 30%；The polycrystalline diamond article processed is welded, is modified；By polycrystalline gold
Hard rock product is heated to 400 DEG C with 10 DEG C of rates per minute, keeps the temperature 8 hours, and process is eliminated in the furnace cooling in stove
The internal stress of middle generation.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of processing method of large scale polycrystalline diamond article, which is characterized in that include the following steps：
1）Obtain large scale polycrystalline diamond bulk；
2）Cutting：To step 1）The large scale polycrystalline diamond bulk of middle acquisition is cut by laser, and obtains blank；
3）Eliminate internal stress：Normalizing or annealing are carried out to the blank of acquisition, eliminate the internal stress generated in cutting process；
4）Sharpening：Blank is sharpened using cobalt anchoring agent diamond grinding wheel；
5）Welding, finishing：Welded, finishing obtains product；
6）Eliminate internal stress：With the step 3）In elimination internal stress operating procedure it is identical, reduce welding and dressing process in
The internal stress of generation.
A kind of 2. processing method of large scale polycrystalline diamond article according to claim 1, which is characterized in that the step
Rapid 1）Middle large scale polycrystalline diamond bulk is directly closed using non-diamond carbon as raw material under 14 ~ 18GPa, 2300 ~ 2600K
Into.
A kind of 3. processing method of large scale polycrystalline diamond article according to claim 1, which is characterized in that the step
Rapid 2）In laser cutting picosecond laser cutting machine or femtosecond laser cutting machine may be used.
A kind of 4. processing method of large scale polycrystalline diamond article according to claim 1, which is characterized in that the step
Rapid 3）The detailed process of middle normalized treatment is：Blank is heated to 200 ~ 400 DEG C with 10 DEG C/min, keeps the temperature 2 ~ 8h, after taking-up
Natural cooling in air.
A kind of 5. processing method of large scale polycrystalline diamond article according to claim 1, which is characterized in that the step
Rapid 3）The detailed process of middle annealing is：Blank is heated to 200 ~ 400 DEG C with 10 DEG C/min, 2 ~ 8h is kept the temperature, in stove
Furnace cooling.
A kind of 6. processing method of large scale polycrystalline diamond article according to claim 1, which is characterized in that the step
Rapid 4）The content of cobalt is 8 ~ 30% in middle cobalt anchoring agent diamond grinding wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711403906.8A CN108127802A (en) | 2017-12-22 | 2017-12-22 | A kind of processing method of large scale polycrystalline diamond article |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711403906.8A CN108127802A (en) | 2017-12-22 | 2017-12-22 | A kind of processing method of large scale polycrystalline diamond article |
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| CN108127802A true CN108127802A (en) | 2018-06-08 |
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| CN201711403906.8A Pending CN108127802A (en) | 2017-12-22 | 2017-12-22 | A kind of processing method of large scale polycrystalline diamond article |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774943A (en) * | 2020-07-17 | 2020-10-16 | 成都东骏激光股份有限公司 | Vertical crystal processing tool and manufacturing method |
| CN112678817A (en) * | 2021-01-08 | 2021-04-20 | 南方科技大学 | Preparation method of millimeter polycrystalline diamond |
| CN114908319A (en) * | 2022-04-22 | 2022-08-16 | 宁波杭州湾新材料研究院 | Diamond-alumina composite film and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774943A (en) * | 2020-07-17 | 2020-10-16 | 成都东骏激光股份有限公司 | Vertical crystal processing tool and manufacturing method |
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| CN112678817A (en) * | 2021-01-08 | 2021-04-20 | 南方科技大学 | Preparation method of millimeter polycrystalline diamond |
| CN114908319A (en) * | 2022-04-22 | 2022-08-16 | 宁波杭州湾新材料研究院 | Diamond-alumina composite film and preparation method thereof |
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