CN207882198U - Detect the device that composite polycrystal-diamond takes off cobalt depth - Google Patents
Detect the device that composite polycrystal-diamond takes off cobalt depth Download PDFInfo
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- CN207882198U CN207882198U CN201820316963.6U CN201820316963U CN207882198U CN 207882198 U CN207882198 U CN 207882198U CN 201820316963 U CN201820316963 U CN 201820316963U CN 207882198 U CN207882198 U CN 207882198U
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Abstract
The utility model discloses a kind of device of the de- cobalt depth of detection composite polycrystal-diamond, it include the height-gauge for placing composite polycrystal-diamond, further include the first conducting wire and the second conducting wire of the electric conductivity of the polycrystalline diamond layer for measuring the composite polycrystal-diamond, the other end and the electric connection of Estimate of Resistance for DC Low Resistance instrument of first conducting wire and the second conducting wire.The beneficial effects of the utility model are mainly reflected in：It is not only simple in structure ingenious, high certainty of measurement, without destruction, and reduces working strength, reduce cost.
Description
Technical field
The utility model is related to sintered carbide tools manufacturing technology fields, specifically, more particularly to detection polycrystalline diamond it is multiple
Close the device that piece takes off cobalt depth.
Background technology
Composite polycrystal-diamond (Polycrystalline diamond compact, abbreviation PDC) is by good gold
Hard rock micro mist is sintered with hard alloy (WC-Co) matrix under superhigh-temperature and-pressure, wherein when sintering temperature reaches 1300 DEG C
More than, the Co elements as binder start to be melted into and enter in diadust gap, and promotion is made to form diamond-gold
Hard rock（D-D）Key, and remain in the diamond layer of composite sheet.And the content of Co can influence the thermostabilization of composite polycrystal-diamond
Property, this is coefficient of thermal expansion mainly due to binder Co and diamond differs greatly [Co:1.46X10-7/K;Diamond：
（1.5~4.8）X10-6/ K, differ an order of magnitude], in thermal histories, often can in diamond layer granular boundary or diamond
Layer generates thermal stress or micro-crack with the bed boundarys WC-Co, and PDC mechanical performances is made to decline.Simultaneously, diamond graphitization can be broken
Bad diamond-diamond key, and lead to a reason of PDC performances decline.
Currently, when compact bit works in geologic structure, composite sheet can not with rock frictional test heat, own temperature
Disconnected raising, and Co and diamond（C element）Coefficient of thermal expansion it is different, at work can due to the continuous raising of temperature volume
Constantly become larger, so as to cause the increase of internal stress, causes the destruction of composite sheet.
Therefore, it is to improve one of the means of composite sheet thermal stability and mechanical performance to reduce Co contents.Currently, de- cobalt technology
It is to reduce one of the main method of Co contents, and relatively common de- cobalt method has：Strong acid chemical etch（De- cobalt Compound-acid
De- cobalt method and phosphoric acid hydrogen peroxide take off cobalt method）And electrochemical erosion method, both can effectively remove the part Co's of diamond layer
In the presence of effective thermal stability and mechanical performance for promoting PDC.
Chinese patent CN104532016A discloses a kind of de- cobalt Compound-acid based on man-made polycrystalline diamond composite sheet
De- cobalt method, including：Organic acid is dissolved in distilled water；Inorganic acid 1 is mixed with organic acid acquired solution；Again by inorganic acid 2
It is mixed with above-mentioned acquired solution and matches to obtain Compound-acid；Man-made polycrystalline diamond composite sheet is immersed in prepared Compound-acid；Adjustment
Dipping temperature is 25~90 DEG C, impregnates 48~72h.After the completion up to the composite polycrystal-diamond of de- cobalt.
Chinese patent CN105603428A disclose it is a kind of from composite polycrystal-diamond remove cobalt method, including with
Lower step：Acid solution is provided, the acid solution includes phosphoric acid and hydrogen peroxide；By the polycrystalline diamond layer of composite polycrystal-diamond upper
It states in acid solution and impregnates, obtain the composite sheet of de- cobalt.The utility model uses the cobalt phase in phosphoric acid removal polycrystalline diamond, phosphate radical
Ion can form stable soluble coordination ion with cobalt ions, be taken off from composite sheet to promote cobalt constantly into solution
It removes；And hydrogen peroxide is added in the utility model, can further increase the removal efficiency of cobalt.
Chinese patent CN104862771A discloses part metals cobalt in a kind of removing electrolysis process composite polycrystal-diamond
Method, be made of electrolysis unit, electrolyte and beaker, electrolysis unit be arranged in beaker, electrolysis unit lower end is immersed in
In electrolyte, first, electrolyte is prepared, then the cobalt in diamond compact is removed by electrolysis unit, cathode is
Inert metal, anode are polycrystalline diamond layer, according to the diamond compact size used in electrolytic process, regulate and control voltage, with
Being normally carried out for reaction, part metals cobalt is gradually removed in composite polycrystal-diamond.
In general, the PDC of Co liquid diffusion impregnation sintering, diamond layer cobalt content typically constitutes from the 10% ~ 15% of volume, is to lead
Body, to improve the thermal stability of PDC, after removing the metal phase of diamond layer using strong acid chemical etch or electrolysis
（Its amount containing cobalt can be reduced to 2wt%, even less than 2wt%）, PCD electric conductivity greatly reduces, and resistivity increases, and resistance increases
Add, as described in above-mentioned Chinese patent CN104532016A, electrolysis take off cobalt after diamond layer resistance may be up to 3000 Ω with
On.Detection takes off following two kinds of the method generally use of cobalt depth at present：One, there is Powerful Light Microscope, can simply survey roughly
Examination takes off cobalt depth, but accuracy is not high；Two, scanning electron microscope can carry out accurate depth survey to each position of product,
Sample making course is complicated, need to carry out metal spraying processing to non-conductive position, and cost is relatively high, and is destructive testing.
Utility model content
The purpose of the utility model is to overcome the shortcomings of the prior art, provide a kind of detection composite polycrystal-diamond
The device of de- cobalt depth.
The purpose of this utility model is achieved through the following technical solutions：
A kind of detection composite polycrystal-diamond takes off the device of cobalt depth, includes for placing composite polycrystal-diamond
Height-gauge further includes the first conducting wire of the electric conductivity of the polycrystalline diamond layer for measuring the composite polycrystal-diamond
With the second conducting wire, the other end and the Estimate of Resistance for DC Low Resistance instrument of first conducting wire and the second conducting wire are electrically connected.
Preferably, a body of rod is fixed on the height-gauge, the body of rod is equipped with a height moving up and down
Sensor.
Preferably, a probe is fixed on the height sensor, the probe is fixedly connected with second conducting wire, institute
Stretching motion can be done by stating the end of probe.
Preferably, the height-gauge include one can rotation pedestal, composite polycrystal-diamond fixed setting
On the pedestal.
Preferably, the Estimate of Resistance for DC Low Resistance instrument also electrically connects with the data processing display for analyzing record data in real time
It connects.
The beneficial effects of the utility model are mainly reflected in：It is not only simple in structure ingenious, high certainty of measurement, and reduces work
Make intensity, reduces cost；And a kind of new detection thinking without destruction is most importantly proposed, it takes full advantage of metal and leads
The Technique Rule of electrical property.
Description of the drawings
Technical solutions of the utility model are described further below in conjunction with the accompanying drawings：
Fig. 1：The structural schematic diagram of the utility model.
Specific implementation mode
The utility model is described in detail below with reference to specific implementation mode shown in the drawings.But these embodiment party
Formula is not limited to the utility model, structure that those skilled in the art are made according to these embodiments, method or
Transformation functionally is all contained in the scope of protection of the utility model.
As shown in Figure 1, the utility model discloses a kind of device of the de- cobalt depth of detection composite polycrystal-diamond, including
Height-gauge 1 for placing composite polycrystal-diamond 2, the composite polycrystal-diamond 2 are positioned over the height with one heart
That spends measuring instrument 1 can be in rotation pedestal.The pedestal is equipped with the limit for limiting the composite polycrystal-diamond 2
Mechanism.
The bottom of the pedestal is equipped with the driving mechanism for driving the pedestal rotation, and the driving mechanism is electronic horse
It reaches, the motor drive shaft of the electro-motor and the pedestal are affixed, drive the pedestal to turn by the motor drive shaft rotation of electro-motor
Dynamic, certainly, the driving mechanism can also be other devices.
A body of rod 5 is fixed on the height-gauge 1, the body of rod 5 is equipped with a highly sensing moving up and down
Device 6 is fixed with a probe 7 on the height sensor 6, and the end of the probe 7 can do stretching motion, the probe 7 and institute
It states the second conducting wire 4 to be fixedly connected, by moving up and down for the height sensor 6, to reach compound to the polycrystalline diamond
The detection of 22 different zones of polycrystalline diamond layer of piece 2.
The composite polycrystal-diamond 2 is sintered by hard alloy substrate 21 and polycrystalline diamond layer 22, described hard
Matter alloy substrate 21 is conductive, only just conductive when containing cobalt in the polycrystalline diamond layer 22, profit
It is measured with the electric conductivity of the cobalt, so the carbide matrix of first conducting wire 3 and the composite polycrystal-diamond 2
Body 21 is close to, and second conducting wire 4 is close to the polycrystalline diamond layer 22 of the composite polycrystal-diamond 2.
The other end of first conducting wire, 3 and second conducting wire 4 is electrically connected with Estimate of Resistance for DC Low Resistance instrument 31, the low electricity of the direct current
Resistance instrument 31 is also electrically connected with the data processing display 32 for analyzing record data in real time.
The utility model further discloses a kind of method of the de- cobalt depth of detection composite polycrystal-diamond, including walks as follows
Suddenly：
The composite polycrystal-diamond 2 is positioned on the pedestal by S1, preparation process, first conducting wire 3 and institute
The hard alloy substrate 21 for stating composite polycrystal-diamond 2 is close to, second conducting wire 4 and the composite polycrystal-diamond 2
Polycrystalline diamond layer 22 be close to, open the Estimate of Resistance for DC Low Resistance instrument 31 and calibrate clearing to it；Second conducting wire 4 is in alignment with institute
State the top surface of the polycrystalline diamond layer 22 of composite polycrystal-diamond 2；
S2, detecting step, pedestal rotate horizontally, and the composite polycrystal-diamond 2 rotates, and second conducting wire 4 is made to exist
The surface of the composite polycrystal-diamond 2 is streaked, and the Estimate of Resistance for DC Low Resistance instrument 31 described in the amm records 1 resistance data value, institute
It is composite polycrystal-diamond periphery 0.5 ~ 2mm of arc length to state amm values, it is of course also possible to adjust it according to actual demand
Corresponding distance.
S3, analytical procedure analyze the obtained data of S2 steps, the electric conductivity of polycrystalline diamond layer 22 are judged, when described
When the resistance data value that the measurement of Estimate of Resistance for DC Low Resistance instrument 31 obtains is that infinitely great or no data is shown, S4 steps are executed；Work as institute
When stating the resistance data value that the measurement of Estimate of Resistance for DC Low Resistance instrument 31 obtains in one week has data value, S5 steps are executed；
S4, moving step, second conducting wire being close to the polycrystalline diamond layer 22 of the composite polycrystal-diamond 2
4 move down b mm, repeat S2-S3 steps；The bmm values are composite polycrystal-diamond 0.02 ~ 0.1mm of height, certainly,
Its corresponding distance can be adjusted according to actual demand.
S5, detecting step is completed, determines that the diamond layer in some altitude range is free of cobalt.
When the Estimate of Resistance for DC Low Resistance instrument 31 measures a certain circle, the obtained resistance data value is when having data value, to recognize
It is clean for the not yet de- cobalt of the height diamond layer.
The beneficial effects of the utility model are mainly reflected in：It is not only simple in structure ingenious, high certainty of measurement, and reduces work
Make intensity, reduces cost；And a kind of new detection thinking without destruction is most importantly proposed, it takes full advantage of metal and leads
The Technique Rule of electrical property.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiment of understanding.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body illustrates that they are all without departing from made by the utility model skill spirit not to limit the scope of protection of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
Claims (5)
1. detecting the device that composite polycrystal-diamond takes off cobalt depth, it is characterised in that：It is multiple including being used to place polycrystalline diamond
Close piece（2）Height-gauge（1）, for measuring the composite polycrystal-diamond（2）Polycrystalline diamond layer（22）Lead
The first electrical conducting wire（3）With the second conducting wire（4）, first conducting wire（3）With the second conducting wire（4）Other end electricity low with direct current
Hinder instrument（31）It is electrically connected.
2. detection composite polycrystal-diamond according to claim 1 takes off the device of cobalt depth, it is characterised in that：The height
Spend measuring instrument（1）On be fixed with a body of rod（5）, the body of rod（5）It is equipped with a height sensor moving up and down（6）.
3. detection composite polycrystal-diamond according to claim 2 takes off the device of cobalt depth, it is characterised in that：The height
Spend sensor（6）On be fixed with a probe（7）, the probe（7）With second conducting wire（4）It is fixedly connected, the probe（7）
End can do stretching motion and be connected on the composite polycrystal-diamond.
4. detection composite polycrystal-diamond according to claim 3 takes off the device of cobalt depth, it is characterised in that：The height
Spend measuring instrument（1）Including one can rotation pedestal, the composite polycrystal-diamond（2）It is fixed on the pedestal.
5. detection composite polycrystal-diamond according to claim 1 takes off the device of cobalt depth, it is characterised in that：It is described straight
Flow low resistance instrument（31）Also with for analyze in real time record data data processing display（32）It is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820316963.6U CN207882198U (en) | 2018-03-08 | 2018-03-08 | Detect the device that composite polycrystal-diamond takes off cobalt depth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820316963.6U CN207882198U (en) | 2018-03-08 | 2018-03-08 | Detect the device that composite polycrystal-diamond takes off cobalt depth |
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| CN207882198U true CN207882198U (en) | 2018-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318538A (en) * | 2018-03-08 | 2018-07-24 | 苏州思珀利尔工业技术有限公司 | Detect the device and method that composite polycrystal-diamond takes off cobalt depth |
-
2018
- 2018-03-08 CN CN201820316963.6U patent/CN207882198U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318538A (en) * | 2018-03-08 | 2018-07-24 | 苏州思珀利尔工业技术有限公司 | Detect the device and method that composite polycrystal-diamond takes off cobalt depth |
| CN108318538B (en) * | 2018-03-08 | 2024-05-03 | 苏州思珀利尔工业技术有限公司 | Device and method for detecting cobalt removal depth of polycrystalline diamond compact |
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