CN107879341A - A kind of diamond cryogenic treating process - Google Patents
A kind of diamond cryogenic treating process Download PDFInfo
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- CN107879341A CN107879341A CN201711067632.XA CN201711067632A CN107879341A CN 107879341 A CN107879341 A CN 107879341A CN 201711067632 A CN201711067632 A CN 201711067632A CN 107879341 A CN107879341 A CN 107879341A
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- diamond
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- subzero treatment
- liquid nitrogen
- room temperature
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Abstract
The invention discloses a kind of diamond cryogenic treating process, it by granularity is that 30/35 mesh and 35/40 diamond are positioned in liquid nitrogen deep case that processing method, which is, carry out subzero treatment, the temperature of liquid nitrogen deep case is down to 180 DEG C from 20 DEG C of substeps of room temperature and is to slowly warm up to room temperature again, then 120 DEG C are heated to after being incubated a period of time, insulation a period of time, finally it is set slowly to return back to room temperature.The present invention can significantly improve two batch diamond group Integral static pressure intensity of 30/35 mesh and 35/40 mesh, and isostatic pressing strength improves about 20% in the diamond particles quantity of 600~800MPa scopes after subzero treatment.Subzero treatment can forever sexually revise material internal crystal structure, improve crystal dislocation situation, portion of residual stress is discharged, so as to influence material property.
Description
Technical field
The present invention relates to a kind of diamond cryogenic treating process, and in particular to a kind of diamond by liquid nitrogen deep at
Reason carries high performance method, category materialogy field.
Background technology
Processed object (material) is exactly placed under a specific ultra-low temperature surroundings by so-called subzero treatment, makes to be processed
Microstructure, the structure of object (material) change, so as to reach a kind of technology for improving material property to a certain extent.
Treatment temperature is minimum can to reach -196 DEG C.In early 20th century, application of the cryogenics in aviation field originally is mainly in liquid
The use of the application of oxygen chemical rocket oxidizer and refrigerating plant in spacecraft, and liquid oxygen fuel, nuclear power rocket propulsion
Agent etc..Some later researchers begin attempt to the processing that cryogenic technique is applied to portion of material, and such way improves winged
Row device is in high-pressure bottle security and the stability of some key components and parts performances.
China has been the first big country of superhard material (diamond, cubic boron nitride) production in the world at present, but people
The intensity for making diamond also has very big room for promotion.Diamond in growth course due to there is the presence of menstruum, therefore
Containing impurity such as B, Ni, Mn, Co, Si, Al, Ca and Mg, so as to show different color and performance.Impurity warp in diamond
Often arranged along the symmetry axis of crystal, distribution is usually wire, also laminar, shaft-like or graininess.Due to diamond
There is impurity, and crystal defect formed in crystal growing process, lattice dislocation etc. in inside, drop that all can be different degrees of
The performance of low diamond.The isostatic pressing strength for the diamond especially being had a major impact to diamond tool service behaviour, can be with
Its internal impurity, defect, residual stress increase and reduce.Therefore, it is necessary to seek a kind of post-processing approach of diamond, with
Improve its performance.
Subzero treatment can forever sexually revise material internal crystal structure, improve crystal dislocation situation, discharge portion of residual
Stress, so as to influence material property.
The content of the invention
It is an object of the invention to provide a kind of cryogenic treating process of diamond.By liquid nitrogen deep handling process, to people
Make diamond particles to be handled, the internal organizational structure of synthetic diamond particles is changed, so as to improve its static pressure
Degree.By being contrasted to the isostatic pressing strength of diamond particles before and after subzero treatment, it was demonstrated that cryogenic treatment process can show really
It is 30/35 mesh, the Integral static pressure intensity of 35/40 mesh, two batch diamond particles to write and improve granularity.30/35 mesh batch diamond
For particle after liquid nitrogen deep is handled, average static pressure intensity level improves 23.17%, and after subzero treatment isostatic pressing strength 600~
The quantity of diamond particles in the range of 800MPa is than improving about 20% before subzero treatment；35/40 mesh batch diamond particles
After liquid nitrogen deep is handled, average static pressure intensity level improves 1.21%, and after subzero treatment isostatic pressing strength in 600~800MPa
In the range of diamond particles quantity than improving about 20% before subzero treatment, while isostatic pressing strength is in 200~400MPa models
The quantity of the diamond particles enclosed is than reducing 1 times before subzero treatment.The lifting of diamond isostatic pressing strength is to its huge application
Market is (such as：Machining, oil/gas drilling, geological drilling, processing of stone etc.) contribution certainly will be could be made that and changed.
The cryogenic treating process of diamond is in the present invention, and the granularity of processed diamond is 30/35 mesh and 35/40
Mesh, processing method are：The diamond that granularity is 30/35 mesh and the diamond that granularity is 35/40 mesh are positioned over liquid nitrogen deep case
In, subzero treatment is carried out, the temperature of deep cooling box is down to -180 DEG C from 20 DEG C of substeps of room temperature and is to slowly warm up to room temperature again, then by it
120 DEG C are heated to after insulation a period of time, insulation a period of time, finally it is slowly returned back to room temperature.
Specifically processing method is：Diamond of the granularity for 30/35 mesh and 35/40 mesh is positioned in liquid nitrogen deep case, it is deep
The temperature of ice chest is reduced to -80 DEG C in 15min from 20 DEG C；20min is incubated at -80 DEG C；In 15min -180 are reduced to from -80 DEG C
℃；20min is incubated at -180 DEG C；20 DEG C are risen to from -180 DEG C in 30min；20min is incubated at 20 DEG C；From 20 in 15min
DEG C rise to 120 DEG C；20min is incubated at 120 DEG C；20 DEG C are naturally cooled to from 120 DEG C.
Beneficial effects of the present invention：
Prove that cryogenic treatment process can significantly improve two batch Buddha's warrior attendants of 30/35 mesh and 35/40 mesh really by testing
The Integral static pressure intensity of stone, the quantity of diamond particles of the isostatic pressing strength in the range of 600~800MPa is than deep after subzero treatment
About 20% is improved before cold treatment.Subzero treatment energy permanent effect material internal crystal structure, discharges portion of residual stress,
To be huge motive force for huge material market so as to change material property.
Brief description of the drawings
Fig. 1 is the non-subzero treatment diamond isostatic pressing strength distribution curve of 30/35 mesh.
Fig. 2 is 30/35 mesh subzero treatment diamond isostatic pressing strength distribution curve.
Fig. 3 is the non-subzero treatment diamond isostatic pressing strength distribution curve of 35/40 mesh.
Fig. 4 is 35/40 mesh subzero treatment diamond isostatic pressing strength distribution curve.
Embodiment
Using two kinds of varigrained diamonds, its granularity is 30/35 mesh, 35/40 mesh respectively.To two kinds of different grains
The diamond of degree carries out screening packet, is positioned in liquid nitrogen deep case, carries out subzero treatment.
Specifically processing method is：The temperature of liquid nitrogen deep case is reduced to -80 DEG C in 15min from 20 DEG C；In -80 DEG C of insulations
20min；In 15min -180 DEG C are reduced to from -80 DEG C；20min is incubated at -180 DEG C；20 DEG C are risen to from -180 DEG C in 30min；
20min is incubated at 20 DEG C；In 15min 120 DEG C are risen to from 20 DEG C；20min is incubated at 120 DEG C；20 are naturally cooled to from 120 DEG C
℃.Strength test is carried out to the diamond particles after processing using intelligent detector for strength of particles.
The defects of increase of diamond static pressure hardness after low-temperature circulating processing is due to lattice structural adjustment causes crystalline substance
Caused by body primitive stress-strain regime irreversible change.Diamond internal residual stress is often formed in diamond
During high pressure-temperature under the conditions of caused by, partly belong to microcosmic thermal stress category.Contain a fixed number inside diamond simultaneously
The impurity of amount, impurity different from the thermal coefficient of expansion of diamond crystal is also a major reason caused by internal stress.It is and right
In the different handling process of different-grain diameter, the releasing degree of this internal stress can be different so that treatment effect has difference
It is different.
As depicted in figs. 1 and 2, Fig. 1 is the non-subzero treatment diamond of 30/35 mesh to the experimental result of 30/35 mesh diamond
Grain isostatic pressing strength distribution curve；Fig. 2 is 30/35 mesh subzero treatment diamond particles isostatic pressing strength distribution curve.
30/35 mesh subzero treatment diamond isostatic pressing strength height of curve has been lifted compared with the diamond of non-subzero treatment, place
Diamonds of the isostatic pressing strength in the range of 600~800MPa improve about 20% after reason；The average static pressure intensity of diamond carries
It is high by 23.17%.This demonstrate that subzero treatment has certain influence to the performance of diamond particles.
As shown in Figure 3 and Figure 4, Fig. 3 is the non-subzero treatment diamond static pressure of 35/40 mesh to 35/40 mesh diamond experimental result
Strength distribution curve；Fig. 4 is 35/40 mesh subzero treatment diamond isostatic pressing strength distribution curve.
The raising that increases of the more non-subzero treatment of 35/40 mesh subzero treatment diamond isostatic pressing strength integrated curved height.
Average static pressure intensity level improves 1.21%, and diamond particles of the isostatic pressing strength in the range of 600~800MPa after subzero treatment
Quantity than improving about 20% before subzero treatment, while isostatic pressing strength is in the number of the diamond particles of 200~400MPa scopes
Amount is than reducing 1 times before subzero treatment.Prove the Integral static pressure intensity of the batch diamond has significantly after subzero treatment
Improve.
Its isostatic pressing strength raising after subzero treatment of 30/35 mesh, 35/40 mesh, two batch diamond groups is more notable,
That is improved in the range of 600~800MPa isostatic pressing strengths is most.Subzero treatment to a certain extent, improves the entirety of diamond group
Isostatic pressing strength.
The experimental result of acquisition can prove that the diamond isostatic pressing strength through low-temperature treatment improves, and makes it have good
Application prospect：The manufacturing process can of extra cost and change drill bit is not needed by the drilling life of drill bit.
Subzero treatment experiment to diamond can see, and the change of diamond intensity performance largely illustrates,
Under such a low temperature process, the microstructure such as the crystal formation of diamond, crystal face, defect, dislocation is changed.Subzero treatment
The intensity of diamond can be changed, discharge partial crystals internal residual stress, improve diamond crystal inside stress
Situation.
Before with artificial diamond fabrication drill bit, low-temperature treatment is carried out to diamond using low temperature treatment technology,
Tool has an enormous advantage.Due to the diamond static pressure hardness increase inlayed in drill bit, the work energy of drill bit will be improved
Power.
Claims (2)
1. a kind of diamond cryogenic treating process, the granularity of processed diamond is 30/35 mesh and 35/40 mesh, processing method
For：Diamond of the granularity for 30/35 mesh and 35/40 mesh is positioned in liquid nitrogen deep case, carries out subzero treatment, liquid nitrogen deep case
Temperature be down to -180 DEG C from 20 DEG C of substeps of room temperature and be to slowly warm up to room temperature again, be heated after being then incubated a period of time
To 120 DEG C, insulation a period of time, finally it is set slowly to return back to room temperature.
A kind of 2. diamond cryogenic treating process according to claim 1, it is characterised in that：Specifically processing method is：Will
Granularity is that the diamond of 30/35 mesh and 35/40 mesh is positioned in liquid nitrogen deep case, the temperature of liquid nitrogen deep case in 15min from
20 DEG C are reduced to -80 DEG C；20min is incubated at -80 DEG C；In 15min -180 DEG C are reduced to from -80 DEG C；20min is incubated at -180 DEG C；
20 DEG C are risen to from -180 DEG C in 30min；20min is incubated at 20 DEG C；In 15min 120 DEG C are risen to from 20 DEG C；In 120 DEG C of guarantors
Warm 20min；20 DEG C are naturally cooled to from 120 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067632.XA CN107879341B (en) | 2017-11-03 | 2017-11-03 | Diamond subzero treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067632.XA CN107879341B (en) | 2017-11-03 | 2017-11-03 | Diamond subzero treatment method |
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| CN107879341A true CN107879341A (en) | 2018-04-06 |
| CN107879341B CN107879341B (en) | 2020-11-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856871A (en) * | 2018-08-06 | 2020-03-03 | 江苏友和工具有限公司 | Diamond cutter bit cryogenic treatment method |
| CN112209361A (en) * | 2020-10-21 | 2021-01-12 | 中国科学院兰州化学物理研究所 | Cryogenic treatment process for improving wear resistance of carbon-based film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080178632A1 (en) * | 2007-01-29 | 2008-07-31 | Rudolph Hugo Petrmichl | Method of making heat treated coated article using diamond-like carbon (DLC) coating and protective film |
| CN101618453A (en) * | 2009-07-28 | 2010-01-06 | 杨树桐 | Casting infiltration method capable of increasing hardness and wear resistance of castings |
| CN102296243A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Steel used for diamond saw blade basal body and producing method thereof |
-
2017
- 2017-11-03 CN CN201711067632.XA patent/CN107879341B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080178632A1 (en) * | 2007-01-29 | 2008-07-31 | Rudolph Hugo Petrmichl | Method of making heat treated coated article using diamond-like carbon (DLC) coating and protective film |
| CN101618453A (en) * | 2009-07-28 | 2010-01-06 | 杨树桐 | Casting infiltration method capable of increasing hardness and wear resistance of castings |
| CN102296243A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Steel used for diamond saw blade basal body and producing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856871A (en) * | 2018-08-06 | 2020-03-03 | 江苏友和工具有限公司 | Diamond cutter bit cryogenic treatment method |
| CN110856871B (en) * | 2018-08-06 | 2021-09-28 | 江苏友和工具有限公司 | Diamond cutter bit cryogenic treatment method |
| CN112209361A (en) * | 2020-10-21 | 2021-01-12 | 中国科学院兰州化学物理研究所 | Cryogenic treatment process for improving wear resistance of carbon-based film |
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| CN107879341B (en) | 2020-11-24 |
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