CN108663312A - The method for taking off cobalt depth is detected based on wire cutting - Google Patents
The method for taking off cobalt depth is detected based on wire cutting Download PDFInfo
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- CN108663312A CN108663312A CN201810189880.XA CN201810189880A CN108663312A CN 108663312 A CN108663312 A CN 108663312A CN 201810189880 A CN201810189880 A CN 201810189880A CN 108663312 A CN108663312 A CN 108663312A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
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Abstract
Present invention is disclosed a kind of methods detecting de- cobalt depth based on wire cutting, include the following steps：Composite polycrystal-diamond after de- cobalt is pre-processed, and does at least one mark line on the base end of the composite polycrystal-diamond；Wire cutting is carried out to diamond end face direction along the mark line, record electric current and feed speed when cutting and observes spark size；According to the cutting current and feed speed and spark size, it is confirmed whether to reach de- cobalt layers；When reaching de- cobalt layers, the both ends of cut-off cutting line are measured to the distance of the diamond end face, and the minimum value in the distance is regarded as into de- cobalt depth.The beneficial effects are mainly as follows：The electric conductivity for taking off cobalt depth can be not only monitored based on the method that wire cutting detects de- cobalt depth, the collection of electric current and feed speed, and convenient for observing the size of electric spark, it is easy to operate, convenient for observing, while there is higher accuracy again.
Description
Technical field
The present invention relates to sintered carbide tools manufacturing technology fields, specifically, more particularly to taking off cobalt depth based on wire cutting detection
The method of degree.
Background technology
Composite polycrystal-diamond (Polycrystalline diamond compact, abbreviation PDC) is by good
Diadust is sintered with hard alloy (WC-Co) matrix under superhigh-temperature and-pressure, wherein when sintering temperature reaches 1300
DEG C or more, the Co elements as binder start to be melted into and enter in diadust gap, and promotion is made to form diamond-
Diamond（D-D）Key, and remain in the diamond layer of composite sheet.And the heat that the content of Co can influence composite polycrystal-diamond is steady
Qualitative, 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 present invention uses the cobalt phase in phosphoric acid removal polycrystalline diamond, phosphate anion
Stable soluble coordination ion can be formed with cobalt ions, to promote cobalt constantly to be removed from composite sheet into solution；And
And hydrogen peroxide is added in the present invention, 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.
Chinese patent CN105974060A discloses a kind of method of the de- cobalt depth of detection composite polycrystal-diamond, by：
Composite polycrystal-diamond after de- cobalt is pre-processed；The composite polycrystal-diamond is carried out along diameter of section direction
Cutting；The section of the composite polycrystal-diamond is further processed；The section is scanned and sectional drawing and right
De- cobalt depth is labeled.
The method generally use that detection at present takes off cobalt depth is as described in above-mentioned patent CN105974060A：There is high power light
Microscope is learned, de- cobalt depth can be tested, but accuracy is not high, there are great errors, and increase manual labor.
Invention content
The purpose of the present invention is overcoming the shortcomings of the prior art, a kind of detected based on wire cutting is provided and takes off cobalt depth
Method.
The purpose of the present invention is achieved through the following technical solutions：
A method of it is detected based on wire cutting and takes off cobalt depth, included the following steps：
S1, the composite polycrystal-diamond after de- cobalt is pre-processed, and in the body terminal of the composite polycrystal-diamond
At least one mark line is done on face；
S2, wire cutting is carried out to diamond end face direction along the mark line, record electric current and feed speed when cutting and observed
Spark size；
S3, according to the cutting current and feed speed and spark size, be confirmed whether to reach de- cobalt layers；
S4, when reaching de- cobalt layers, measure the both ends of cut-off cutting line to the distance of the diamond end face, and will be in the distance
Minimum value regards as de- cobalt depth.
Preferably, in S1 steps, the composite polycrystal-diamond after described pair of de- cobalt carries out pretreatment and includes at least：It is right
Outer circle, hard alloy end face and the chamfering of composite polycrystal-diamond after de- cobalt are processed, polish and clean.
Preferably, in S1 steps, the length of every mark line is identical as the diameter of described matrix end face.
Preferably, in the S2 steps, the composite polycrystal-diamond is fixed on the linear cutting equipment and protects
Water holding is flat.
Preferably, in the S3 steps, when the cutting current, feed speed and electric spark size stabilization, then assert
The composite polycrystal-diamond electric conductivity is good, not to de- cobalt layers, conversely, when the cutting current is zero, almost without electrical fire
Flower and feed speed be 0, then assert the composite polycrystal-diamond the depth electric conductivity be 0, reach take off cobalt layers.
Preferably, in S3 steps, also prevent the composite polycrystal-diamond from falling by support or magnetic.
Preferably, further include between the S3 steps and S4 steps composite polycrystal-diamond after cutting carry out it is clear
It washes, and the cut off after cutting is marked.
Preferably, in S4 steps, uncut height is measured by image instrument.
The beneficial effects are mainly as follows：The method that de- cobalt depth is detected based on wire cutting not only can be to taking off cobalt
The electric conductivity of depth is monitored, the collection of electric current and feed speed, and convenient for the size of observation electric spark, easy to operate,
Convenient for observation, while there is higher accuracy again.
Description of the drawings
Technical scheme of the present invention is further explained below in conjunction with the accompanying drawings：
Fig. 1：The composite polycrystal-diamond of the present invention cuts perspective view.
Specific implementation mode
Below with reference to specific implementation mode shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
It is not limited to the present invention, structure that those skilled in the art are made according to these embodiments, method or functionally
Transformation is included within the scope of protection of the present invention.
As shown in Figure 1, present invention is disclosed a kind of method detecting de- cobalt depth based on wire cutting, include the following steps：
S1, to take off cobalt after composite polycrystal-diamond pre-process, the composite polycrystal-diamond after described pair of de- cobalt into
Row pretreatment includes at least：Outer circle, hard alloy end face and the chamfering of composite polycrystal-diamond after de- cobalt are processed,
Polishing and cleaning.And at least one mark line is done on the base end of the composite polycrystal-diamond 1, every label
The length of line is identical as the diameter of described matrix end face.
S2, the composite polycrystal-diamond are fixed on the linear cutting equipment and holding is horizontal, along the mark line
Wire cutting is carried out to 2 direction of diamond end face, record electric current and feed speed when cutting and observes spark size；
S3, according to the cutting current and feed speed and spark size, be confirmed whether to reach de- cobalt layers；When cutting electricity
Stream, feed speed and electric spark size are stablized, then assert that the composite polycrystal-diamond electric conductivity is good, extremely not de- cobalt layers,
Conversely, when the cutting current is zero, it is 0 almost without electric spark and feed speed, then assert the composite polycrystal-diamond
It is 0 in the electric conductivity of the depth, reaches and take off cobalt layers, after the completion of wire cutting, the glomerocryst gold is also prevented by support or magnetic
Hard rock composite sheet is fallen, and the composite polycrystal-diamond after cutting is cleaned, and the cut off after cutting is marked.
S4, when reaching de- cobalt layers, measure the both ends of cut-off cutting line to the distance of the diamond end face 2, and should be away from
Minimum value from regards as de- cobalt depth, remaining highly measures uncut height by image instrument.
The beneficial effects are mainly as follows：The method that de- cobalt depth is detected based on wire cutting not only can be to taking off cobalt
The electric conductivity of depth is monitored, the collection of electric current and feed speed, and convenient for the size of observation electric spark, easy to operate,
Convenient for observation, while there is higher accuracy again.
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.
The series of detailed descriptions listed above only for the present invention feasible embodiment specifically
Bright, they are all without departing from equivalent implementations made by technical spirit of the present invention not to limit the scope of the invention
Or change should all be included in the protection scope of the present invention.
Claims (8)
1. detecting the method for taking off cobalt depth based on wire cutting, which is characterized in that include the following steps：
S1, the composite polycrystal-diamond after de- cobalt is pre-processed, and in the body terminal of the composite polycrystal-diamond
Face（1）On do at least one mark line；
S2, along the mark line to diamond end face（2）Direction carries out wire cutting, records electric current and feed speed when cutting and sees
Examine spark size；
S3, according to the cutting current and feed speed and spark size, be confirmed whether to reach de- cobalt layers；
S4, when reaching de- cobalt layers, measure the both ends of cut-off cutting line to the diamond end face（2）Distance, and by the distance
In minimum value regard as de- cobalt depth.
2. according to claim 1 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In S1 steps,
Composite polycrystal-diamond after described pair of de- cobalt carries out pretreatment and includes at least：To the composite polycrystal-diamond after de- cobalt
Outer circle, hard alloy end face and chamfering are processed, polish and clean.
3. according to claim 2 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In S1 steps,
The length of every mark line is identical as the diameter of described matrix end face.
4. according to claim 2 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In the S2 steps
In, the composite polycrystal-diamond is fixed on the linear cutting equipment and holding is horizontal.
5. according to claim 3 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In the S3 steps
In, when the cutting current, feed speed and electric spark size stabilization, then assert that the composite polycrystal-diamond electric conductivity is good
It is good, not to de- cobalt layers, conversely, when the cutting current is zero, it is 0 almost without electric spark and feed speed, then assert described gather
Diamond composite sheet is 0 in the electric conductivity of the depth, reaches and takes off cobalt layers.
6. according to claim 4 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In S3 steps,
Also prevent the composite polycrystal-diamond from falling by support or magnetic.
7. according to claim 4 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In the S3 steps
Further include cleaning the composite polycrystal-diamond after cutting between S4 steps, and by the cut off after cutting into rower
Note.
8. according to claim 1 detect the method for taking off cobalt depth based on wire cutting, it is characterised in that：In S4 steps,
Uncut height is measured by image instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189880.XA CN108663312A (en) | 2018-03-08 | 2018-03-08 | The method for taking off cobalt depth is detected based on wire cutting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189880.XA CN108663312A (en) | 2018-03-08 | 2018-03-08 | The method for taking off cobalt depth is detected based on wire cutting |
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| CN108663312A true CN108663312A (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810189880.XA Pending CN108663312A (en) | 2018-03-08 | 2018-03-08 | The method for taking off cobalt depth is detected based on wire cutting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470200A (en) * | 2019-09-02 | 2019-11-19 | 武汉锐特金刚石有限公司 | A method of detection diamond compact takes off cobalt depth |
| CN116681697A (en) * | 2023-07-28 | 2023-09-01 | 无锡日联科技股份有限公司 | Cobalt removal measuring method and device for diamond compact and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126260A (en) * | 2011-01-06 | 2011-07-20 | 深圳市海明润实业有限公司 | Method for processing irregular PDC (Polycrystalline Diamond Composite) |
| CN105974060A (en) * | 2016-05-05 | 2016-09-28 | 河南晶锐新材料股份有限公司 | Method for detecting cobalt removal depth of polycrystalline diamond compact |
-
2018
- 2018-03-08 CN CN201810189880.XA patent/CN108663312A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126260A (en) * | 2011-01-06 | 2011-07-20 | 深圳市海明润实业有限公司 | Method for processing irregular PDC (Polycrystalline Diamond Composite) |
| CN105974060A (en) * | 2016-05-05 | 2016-09-28 | 河南晶锐新材料股份有限公司 | Method for detecting cobalt removal depth of polycrystalline diamond compact |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470200A (en) * | 2019-09-02 | 2019-11-19 | 武汉锐特金刚石有限公司 | A method of detection diamond compact takes off cobalt depth |
| CN110470200B (en) * | 2019-09-02 | 2024-02-20 | 武汉锐特金刚石有限公司 | Method for detecting cobalt removal depth of diamond compact |
| CN116681697A (en) * | 2023-07-28 | 2023-09-01 | 无锡日联科技股份有限公司 | Cobalt removal measuring method and device for diamond compact and electronic equipment |
| CN116681697B (en) * | 2023-07-28 | 2023-10-20 | 无锡日联科技股份有限公司 | Cobalt removal measuring method and device for diamond compact and electronic equipment |
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Application publication date: 20181016 |
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