CN102606082A - Diamond compact and manufacturing process for same - Google Patents
Diamond compact and manufacturing process for same Download PDFInfo
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- CN102606082A CN102606082A CN2012100870617A CN201210087061A CN102606082A CN 102606082 A CN102606082 A CN 102606082A CN 2012100870617 A CN2012100870617 A CN 2012100870617A CN 201210087061 A CN201210087061 A CN 201210087061A CN 102606082 A CN102606082 A CN 102606082A
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- diamond compact
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- diadust
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Abstract
The invention discloses a diamond compact, which comprises a hard alloy substrate and a diamond polycrystalline layer connected onto the upper end face of the hard alloy substrate, wherein the hard alloy substrate is integrated with the diamond polycrystalline layer to integrally form a cylinder shape, and the hard alloy substrate is made of hard alloy containing 2%-13% of cobalt. The invention further discloses a manufacturing process for the diamond compact. Abrasion resistance of the diamond compact is improved by reducing the cobalt content in the hard alloy of the hard alloy substrate, so that the service life of the diamond compact is prolonged.
Description
Technical field
The present invention relates to super-hard compound material, specifically is diamond compact and manufacturing process thereof.
Background technology
Composite polycrystal-diamond is the composite material that a kind of diamond and hard alloy substrate are formed, and it has hardness height, characteristics that abrasion resistance is good.Existing composite polycrystal-diamond mainly is divided into composite polycrystal-diamond (PCD) and the polycrystalline diamond composite sheet is bored tooth (PDC); Wherein, Composite polycrystal-diamond (PCD) is to be used for doing the composite superhard material that diamond cutter is used; Because hardness that it is high and abrasion resistance, having substituted traditional high-speed steel and hard alloy cutter becomes carpenter and field of machining first-selection; It is the crucial composite superhard material of oil, natural gas and geological drilling that the polycrystalline diamond composite sheet is bored tooth (PDC), is main working parts and material on the diamond bit, and its performance quality has directly determined the oil-gas geology drilling efficiency.
Metallic cobalt is as a kind of catalyst, and it plays important effect in the HTHP building-up process of composite polycrystal-diamond and polycrystalline diamond composite sheet brill tooth.Contain the cobalt amount in the carbide alloy when high; Have cobalt in the more hard alloy when producing diamond compact and be penetrated in the diadust and go in that HTHP is synthetic, the cobalt metal is as a kind of catalyst and growth stimulator, and the cobalt of seeing through in the diadust is many more; Let more easily and grow between the diadust together; Thereby help the synthetic of material, production technology also is easier to control and management, and product percent of pass is high.For the ease of synthesizing of material; Produce composite polycrystal-diamond and polycrystalline diamond composite sheet now and bore the cobalt amount that contains in one of the used main raw material(s) of the tooth carbide alloy all above 13%; Yet; Composite polycrystal-diamond and polycrystalline diamond composite sheet are bored and are contained the cobalt amount in the tooth when high more; It is poor more that composite polycrystal-diamond and polycrystalline diamond composite sheet are bored the tooth abrasion resistance, and this directly causes composite polycrystal-diamond cutter and polycrystalline diamond composite sheet to bore the drilling life of bit weak point of tooth, has influenced processing, drilling efficiency.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of diamond compact that improves abrasion resistance is provided; The present invention also provides the cobalt amount that contains that on the basis that guarantees qualified products, reduces in the diamond compact carbide alloy, thereby improves the diamond compact manufacturing process of the anti-wear performance of the diamond compact of processing.
The object of the invention is mainly realized through following technical scheme: diamond compact; Comprise hard alloy substrate and be connected the dimond synneusis layer of hard alloy substrate upper surface; Said hard alloy substrate and dimond synneusis layer become one, and whole formation is cylindric; Said hard alloy substrate is that 2%～13% carbide alloy is processed by containing the cobalt amount.
The manufacturing process of above-mentioned diamond compact may further comprise the steps: A, to be ready to diadust and to contain the cobalt amount be 2%～13% hard alloy substrate;
B, diadust is carried out the sintering purified treatment in vacuum sintering furnace;
C, be ready to the zirconium cup, the diadust after the sintering purified treatment be placed on zirconium cup inner bottom part, again with hard alloy substrate be placed on diadust above, then through hydraulic press diadust and hard alloy substrate compacting;
The substrate that D, the diadust with compacting, hard alloy substrate and zirconium cup are formed is assembled in and wholely in the assembled block that pyrophillite, carbon pipe and carbon plate constitute constitutes a synthetic piece;
E, will synthesize piece and be placed in the pressure chamber of cubic apparatus diamond hydraulic press, and obtain the diamond compact blank at the synthetic piece of HTHP pressed;
F, the diamond compact blank is processed into standard size;
G, to processing after diamond compact carry out the finished product that quality examination obtains meeting technical standard.Because metal zirconium ductility is good; Than being easier to moulding; And it at high temperature can keep independent form, can not be penetrated in the diadust and go, therefore; The present invention positions diadust and carbide matrix body structure through the zirconium cup, thereby makes the diamond compact that produces reach the solid shape of demand.
The sintering purified treatment of said step B may further comprise the steps:
B.1, the cooling system of open vacuum agglomerating furnace and body of heater cooled off;
B.2, diadust is added in the specimen cup, and specimen cup is put into body of heater, the body of heater general supply of closing;
B.3, open low vacuum, reach one-level vacuum;
B.4, open high vacuum, reach secondary vacuum;
B.5, start vacuum sintering furnace, and carry out sintering processes;
B.6, take out the diadust handle well and carry out the powder that quality examination is met quality requirement and indicate subsequent use.The purpose that the present invention opens low vacuum is to require to prepare for opening high vacuum according to machinery, is to avoid the internal construction of vacuum sintering furnace oxidized and open the purpose that high vacuum reaches secondary vacuum.Wherein diadust is carried out quality examination, the diadust purity after should guaranteeing to handle reaches more than 99.95%, and it is few to adhere to gas.
The pressure cavity temperature of cubic apparatus diamond hydraulic press is 1300～1500 ℃ in the said step e, and pressure is 5G～7G handkerchief.
The detailed process of said step F is: be processed into standard size to the diamond compact blank with the centreless mill earlier; Again with wire cutting machine tool processing dimond synneusis layer end face; Grind dimond synneusis layer end face on grinder the cutting back, the diamond compact blank is placed on carries out polishing on the polishing machine at last.Wherein, Wire cutting machine tool directly cuts dimond synneusis layer end face with tungsten filament, molybdenum filament etc.; Can directly cut away the irregular part of dimond synneusis layer end face, thereby process velocity is fast and practice thrift processing cost, grinder should be guaranteed about 50 hours the dimond synneusis layer.
Quality examination to the diamond compact blank among the said step G comprises that microstructure, phase composition, granularity, density, External Defect, internal flaw, mechanical property, abrasion resistance, impact resistance and the heat stability of diamond compact blank are carried out system to be detected.
Compared with prior art, the present invention has following beneficial effect: the hard alloy substrate of (1) diamond compact of the present invention is that 2%～13% carbide alloy is processed by containing the cobalt amount, has reduced cobalt content in the carbide alloy of processing hard alloy substrate because of the present invention; So; The present invention is when carrying out processing and manufacturing, and the cobalt that gets into the dimond synneusis layer from hard alloy substrate reduces, and cobalt content residual in the dimond synneusis layer of the diamond compact of producing reduces; Polycrystalline diamond density and volume ratio increase; Compactness improves, and the D-D key of formation is better with degree, thereby increases substantially the abrasion resistance and the application life of diamond compact dimond synneusis layer.
(2) the present invention carries out the sintering purified treatment through vacuum sintering furnace earlier to diadust, and this has just improved the intensity of diadust, so, has improved the dimond synneusis layer anti-wear performance that produces; The substrate that the present invention forms the diadust of compacting, hard alloy substrate and zirconium cup is assembled in and wholely in the assembled block that pyrophillite, carbon pipe and carbon plate constitute constitutes a synthetic piece; To synthesize piece again is placed in the pressure chamber of cubic apparatus diamond hydraulic press; And obtain the diamond compact blank at the synthetic piece of HTHP pressed; The present invention protects through the substrate that assembled block is formed diadust, hard alloy substrate and the zirconium cup of compacting, so, and evenly pressure transmission in the pressing process; Not yielding; And the present invention presses cavity temperature and pressure curve through reasonably setting cubic apparatus diamond hydraulic press, and this has just improved the bond strength of dimond synneusis layer and hard alloy substrate, thereby the qualification rate of the product that assurance is produced.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention diamond compact.
The pairing name of Reference numeral is called in the accompanying drawing: 1, hard alloy substrate, 2, the dimond synneusis layer.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment:
As shown in Figure 1, diamond compact comprises hard alloy substrate 1 and dimond synneusis layer 2, and wherein, hard alloy substrate 1 is that 2%～13% carbide alloy is processed by containing the cobalt amount.Dimond synneusis layer 2 is connected hard alloy substrate 1 upper surface, and hard alloy substrate 1 becomes one with dimond synneusis layer 2, and whole formation is cylindric.
The manufacturing process of diamond compact may further comprise the steps: step 1, to be ready to diadust and to contain the cobalt amount be 2%～13% hard alloy substrate, and ready diadust is placed on when not using in the environment of constant temperature and humidity and preserves.Step 2, diadust was mixed in batch mixer 25～35 minutes, and then diadust is carried out the sintering purified treatment in vacuum sintering furnace.Step 3, be ready to the zirconium cup; Diadust after the sintering purified treatment is placed on zirconium cup inner bottom part and should guarantees powder everywhere consistency of thickness in the zirconium cup; Again with hard alloy substrate be placed on diadust above, then through hydraulic press diadust and hard alloy substrate compacting.The substrate that step 4, the diadust with compacting, hard alloy substrate and zirconium cup are formed is assembled in and wholely in the assembled block that pyrophillite, carbon pipe and carbon plate constitute constitutes a synthetic piece, should be placed in the baking oven for untapped synthetic piece and preserve; Wherein, the substrate that the diadust of compacting, hard alloy substrate and zirconium cup are formed constitutes the inside of synthetic piece, and pyrophillite constitutes the outside of synthetic piece, and the biography temperature medium that carbon pipe and carbon plate constitute is between substrate and pyrophillite.Step 5, will synthesize piece and be placed in the pressure chamber of cubic apparatus diamond hydraulic press; And obtain the diamond compact blank at the synthetic piece of HTHP pressed; Wherein, The pressure chamber of cubic apparatus diamond hydraulic press is become by 6 tops, top to bottom, left and right, front and rear capitate of cubic apparatus diamond hydraulic press, and the pressure cavity temperature of cubic apparatus diamond hydraulic press is preferably 1300～1500 ℃, and pressure is preferably 5G～7G handkerchief.Step 6, the diamond compact blank is processed into standard size; The detailed process of this step is for being processed into standard size to the diamond compact blank with the centreless mill earlier; Again with wire cutting machine tool processing dimond synneusis layer end face; Grind dimond synneusis layer end face on grinder the cutting back, the diamond compact blank is placed on carries out polishing on the polishing machine at last.Step 7, to processing after diamond compact carry out the finished product that quality examination obtains meeting technical standard; Wherein, the quality examination to the diamond compact blank comprises that microstructure, phase composition, granularity, density, External Defect, internal flaw, mechanical property, abrasion resistance, impact resistance and the heat stability of diamond compact blank are carried out system to be detected.
The detailed process of sintering purified treatment is in the step 2: the cooling system of open vacuum agglomerating furnace also cools off body of heater; Diadust is added in the specimen cup, and specimen cup is put into body of heater, the body of heater general supply of closing; Open low vacuum, reach one-level vacuum; Open high vacuum, reach secondary vacuum; Start vacuum sintering furnace, and carry out sintering processes; The diadust that taking-up is handled well also carries out the powder that quality examination is met quality requirement and indicates subsequent use.In the zirconium cup, put into diadust in the step 3 and hard alloy substrate is put into before the zirconium cup and should zirconium cup, hard alloy substrate cleaned up and dry; The caliber size of zirconium cup should be mated with hard alloy substrate end face diameter size; The height of zirconium cup sidewall is higher than diadust layer and the hard alloy substrate height after range upon range of; And the wall of cup bending that after with diadust and hard alloy substrate compacting, again the zirconium cup is positioned at above the hard alloy substrate is pressed in above the hard alloy substrate; Carry out the secondary compacting with hydraulic press again, the substrate compacting of whole diadust, hard alloy substrate and zirconium cup composition.
As stated, then can well realize the present invention.
Claims (6)
1. diamond compact is characterized in that, comprises hard alloy substrate and is connected the dimond synneusis layer of hard alloy substrate upper surface, and said hard alloy substrate and dimond synneusis layer become one, and whole constitute cylindric; Said hard alloy substrate is that 2%～13% carbide alloy is processed by containing the cobalt amount.
2. realize the manufacturing process of the described diamond compact of claim 1, it is characterized in that, may further comprise the steps: A, to be ready to diadust and to contain the cobalt amount be 2%～13% hard alloy substrate;
B, diadust is carried out the sintering purified treatment in vacuum sintering furnace;
C, be ready to the zirconium cup, the diadust after the sintering purified treatment be placed on zirconium cup inner bottom part, again with hard alloy substrate be placed on diadust above, then through hydraulic press diadust and hard alloy substrate compacting;
The substrate that D, the diadust with compacting, hard alloy substrate and zirconium cup are formed is assembled in and wholely in the assembled block that pyrophillite, carbon pipe and carbon plate constitute constitutes a synthetic piece;
E, will synthesize piece and be placed in the pressure chamber of cubic apparatus diamond hydraulic press, and obtain the diamond compact blank at the synthetic piece of HTHP pressed;
F, the diamond compact blank is processed into standard size;
G, to processing after diamond compact carry out the finished product that quality examination obtains meeting technical standard.
3. the manufacturing process of diamond compact according to claim 2 is characterized in that, the sintering purified treatment of said step B may further comprise the steps:
B.1, the cooling system of open vacuum agglomerating furnace and body of heater cooled off;
B.2, diadust is added in the specimen cup, and specimen cup is put into body of heater, the body of heater general supply of closing;
B.3, open low vacuum, reach one-level vacuum;
B.4, open high vacuum, reach secondary vacuum;
B.5, start vacuum sintering furnace, and carry out sintering processes;
B.6, take out the diadust handle well and carry out the powder that quality examination is met quality requirement and indicate subsequent use.
4. the manufacturing process of diamond compact according to claim 2 is characterized in that, the pressure cavity temperature of cubic apparatus diamond hydraulic press is 1300～1500 ℃ in the said step e, and pressure is 5G～7G handkerchief.
5. the manufacturing process of diamond compact according to claim 2; It is characterized in that; The detailed process of said step F is: be processed into standard size to the diamond compact blank with the centreless mill earlier; With wire cutting machine tool processing dimond synneusis layer end face, grind dimond synneusis layer end face on grinder the cutting back, the diamond compact blank is placed on carries out polishing on the polishing machine at last again.
6. the manufacturing process of diamond compact according to claim 2; It is characterized in that the quality examination to the diamond compact blank among the said step G comprises that microstructure, phase composition, granularity, density, External Defect, internal flaw, mechanical property, abrasion resistance, impact resistance and the heat stability of diamond compact blank are carried out system to be detected.
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| CN2012100870617A CN102606082A (en) | 2012-03-29 | 2012-03-29 | Diamond compact and manufacturing process for same |
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| CN2012100870617A CN102606082A (en) | 2012-03-29 | 2012-03-29 | Diamond compact and manufacturing process for same |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974829A (en) * | 2012-12-04 | 2013-03-20 | 四川科力特硬质合金股份有限公司 | Compound hard alloy plane compounding method |
| CN103072332A (en) * | 2012-12-27 | 2013-05-01 | 深圳市海明润实业有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN104148885A (en) * | 2014-06-16 | 2014-11-19 | 黄河科技学院 | Polycrystalline diamond pick-rod machining process |
| CN104493182A (en) * | 2014-10-23 | 2015-04-08 | 金华中烨超硬材料有限公司 | Diamond-high vanadium-titanium hard alloy polycrystalline composite chip and preparation method thereof |
| CN104863513A (en) * | 2015-04-29 | 2015-08-26 | 富耐克超硬材料股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN107363257A (en) * | 2017-07-24 | 2017-11-21 | 中南钻石有限公司 | A kind of polycrystalline diamond blank vacuum purification method |
| CN108145384A (en) * | 2017-12-27 | 2018-06-12 | 武汉锐特金刚石有限公司 | A kind of adamas composite sheet of tooth face and its manufacturing method |
| CN108661564A (en) * | 2018-05-02 | 2018-10-16 | 武汉锐特金刚石有限公司 | A kind of more rib Ax-shaped adamas composite sheet of tooth face and its manufacturing method |
| CN108687353A (en) * | 2018-06-20 | 2018-10-23 | 深圳市海明润超硬材料股份有限公司 | A kind of diamond compact and preparation method |
| CN109113580A (en) * | 2018-08-21 | 2019-01-01 | 立府精密机械有限公司 | A kind of preparation process of PDC drill bit diamond compact |
| CN110029943A (en) * | 2019-05-05 | 2019-07-19 | 广东钜鑫新材料科技股份有限公司 | MULTILAYER COMPOSITE diamond hard alloy wear resistant parts and its manufacturing method |
| CN111420616A (en) * | 2020-04-02 | 2020-07-17 | 广东钜鑫新材料科技股份有限公司 | Diamond compact and preparation method thereof |
| CN111852344A (en) * | 2020-07-15 | 2020-10-30 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN114700494A (en) * | 2021-12-14 | 2022-07-05 | 河南晶锐新材料股份有限公司 | Preparation method of polycrystalline diamond compact |
| CN115110077A (en) * | 2022-06-29 | 2022-09-27 | 潜江市江汉钻具有限公司 | Preparation method of high-performance PDC drilling tool ball teeth |
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| CN1249221A (en) * | 1998-07-31 | 2000-04-05 | 住友电气工业株式会社 | Diamond sinter and its mfg. method |
| US20080023231A1 (en) * | 2006-07-31 | 2008-01-31 | Us Synthetic Corporation | Superabrasive element comprising ultra-dispersed diamond grain structures, structures utilizing same, and methods of manufacture |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974829A (en) * | 2012-12-04 | 2013-03-20 | 四川科力特硬质合金股份有限公司 | Compound hard alloy plane compounding method |
| CN103072332A (en) * | 2012-12-27 | 2013-05-01 | 深圳市海明润实业有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN103072332B (en) * | 2012-12-27 | 2016-03-02 | 深圳市海明润超硬材料股份有限公司 | A kind of composite polycrystal-diamond and preparation method thereof |
| CN104148885A (en) * | 2014-06-16 | 2014-11-19 | 黄河科技学院 | Polycrystalline diamond pick-rod machining process |
| CN104148885B (en) * | 2014-06-16 | 2016-07-20 | 黄河科技学院 | Polycrystalline diamond pick rod processing technique |
| CN104493182A (en) * | 2014-10-23 | 2015-04-08 | 金华中烨超硬材料有限公司 | Diamond-high vanadium-titanium hard alloy polycrystalline composite chip and preparation method thereof |
| CN104493182B (en) * | 2014-10-23 | 2016-06-29 | 金华中烨超硬材料有限公司 | A kind of diamond-Gao vanadium titanium hard alloy glomerocryst composite sheet and preparation method thereof |
| CN104863513A (en) * | 2015-04-29 | 2015-08-26 | 富耐克超硬材料股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN104863513B (en) * | 2015-04-29 | 2017-05-17 | 富耐克超硬材料股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN107363257A (en) * | 2017-07-24 | 2017-11-21 | 中南钻石有限公司 | A kind of polycrystalline diamond blank vacuum purification method |
| CN108145384A (en) * | 2017-12-27 | 2018-06-12 | 武汉锐特金刚石有限公司 | A kind of adamas composite sheet of tooth face and its manufacturing method |
| CN108661564A (en) * | 2018-05-02 | 2018-10-16 | 武汉锐特金刚石有限公司 | A kind of more rib Ax-shaped adamas composite sheet of tooth face and its manufacturing method |
| CN108687353A (en) * | 2018-06-20 | 2018-10-23 | 深圳市海明润超硬材料股份有限公司 | A kind of diamond compact and preparation method |
| CN109113580A (en) * | 2018-08-21 | 2019-01-01 | 立府精密机械有限公司 | A kind of preparation process of PDC drill bit diamond compact |
| CN109113580B (en) * | 2018-08-21 | 2020-06-23 | 立府精密机械有限公司 | Preparation process of diamond composite sheet for PDC drill bit |
| CN110029943A (en) * | 2019-05-05 | 2019-07-19 | 广东钜鑫新材料科技股份有限公司 | MULTILAYER COMPOSITE diamond hard alloy wear resistant parts and its manufacturing method |
| CN111420616A (en) * | 2020-04-02 | 2020-07-17 | 广东钜鑫新材料科技股份有限公司 | Diamond compact and preparation method thereof |
| CN111852344A (en) * | 2020-07-15 | 2020-10-30 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN111852344B (en) * | 2020-07-15 | 2022-04-08 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact and preparation method thereof |
| CN114700494A (en) * | 2021-12-14 | 2022-07-05 | 河南晶锐新材料股份有限公司 | Preparation method of polycrystalline diamond compact |
| CN115110077A (en) * | 2022-06-29 | 2022-09-27 | 潜江市江汉钻具有限公司 | Preparation method of high-performance PDC drilling tool ball teeth |
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Application publication date: 20120725 |