CN102587838B - Manufacturing method of hot-press polymerized coarse-grain diamond drill bit - Google Patents
Manufacturing method of hot-press polymerized coarse-grain diamond drill bit Download PDFInfo
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- CN102587838B CN102587838B CN201110392614.5A CN201110392614A CN102587838B CN 102587838 B CN102587838 B CN 102587838B CN 201110392614 A CN201110392614 A CN 201110392614A CN 102587838 B CN102587838 B CN 102587838B
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Abstract
The invention discloses a manufacturing method of a hot-press polymerized coarse-grain diamond drill bit, comprising the steps of: firstly prefabricating polymerized coarse-grain diamond fan-shaped cutting unit thin layers by using a cold-press method; regularly and vertically arraying the cutting unit thin layers with different specifications along the radial direction of a drill bit layer by layer to form fan-shaped cutting work blocks; and placing the a plurality of cutting work blocks into a graphite mould and performing hot pressing to form the hot-press polymerized coarse-grain diamond drill bit. The cutting unit thin layers are distributed and arrayed in a work layer of the drill bit like a concentric circle, so that the principle of drilling to crush rocks is embodied; continuous crushing caves can be formed at the rocks at the bottoms of holes, so that the rock crushing cave effect can be fully utilized during the drilling; and the polymerized coarse-grain diamond has good self-sharpening effect and can keep very high exposure, so that the rock cutting depth is improved and the rock crushing efficiency of the drill bit is high. Compared with the common drill bits, the manufactured drill bit in the invention has obvious advantages in the deep hard rock prospecting and the wire line coring drilling.
Description
Technical field
The present invention relates to the manufacture method of the manufacture method of Geological Engineering subject field diamond bit used, particularly a kind of hot-press polymerized coarse-grain diamond drill bit.
Background technology
China starts to develop synthetic diamond core bit, up to now existing nearly half a century.Although current diamond bit has good performance, can obtain higher economic and technical norms.But along with the development to deep prospecting direction, rock stratum is more and more harder and complicated, changeable; Wire line coring probing is imperative, and not only drilling efficiency is high to require diamond bit, and requires to grow application life, also requires drill bit will get well the compliance of rock stratum; And the kind of existing diamond bit is few, its performance is difficult to meet above-mentioned many-sided requirement.
Diamond bit is in creeping into, and the adamantine edges and corners of part there will be micro-embrittlement phenomenon, and this is conducive to maintain the sharp state of drill bit and improves rate of penetration.But this micro-embrittlement is very limited, therefore, be also limited to improving rate of penetration; Meanwhile, most diamonds do not have the phenomenon of micro-embrittlement, do not possess sharping by oneself affect.
In sum, because existing drill bit exists many deficiencies, can not meet the demand of current probing, therefore develop that a kind of drilling efficiency is high, long service life and be the task of top priority of Geological Engineering subject to the good drill bit of lithology compliance.
Summary of the invention
The object of this invention is to provide a kind of manufacture method of hot-press polymerized coarse-grain diamond drill bit, the drill bit drilling efficiency that it is produced is high, and long service life is good to the compliance of different rocks, thereby meets the higher demand in geology engineering discipline field.
Object of the present invention is realized by following technical scheme:
A manufacture method for hot-press polymerized coarse-grain diamond drill bit, its main technological steps is:
(1) selected raw material is the coarse gold hard rock of vacuum brazing method polymerization, on steel mould, get out regular aperture of arranging according to design and requirement, polymerization coarse gold hard rock is inserted in the aperture of steel mould, the carcass metal material powder that contains adhesive on covering again, on cold press, suppress, its pressure of colding pressing is 180～220MPa, and the dwell time is 5～8s, the fan-shaped cutting unit thin layer of drill bit that can precast different size, its every bed thickness is 1.6～2.5mm;
(2) by fan-shaped polymerization coarse gold hard rock cutting unit thin layer, successively superpose and pack in graphite jig to little from large by external diameter, form the fan-shaped cutwork piece of multiple drill bits, each fan-shaped cutwork piece is radially vertically arranged in a combination along drill bit by 5～8 different layers of polymer coarse gold hard rock cutting unit thin layers of specification; After whole fan-shaped cutwork pieces have been assembled, pack weld layer metal powder material into, press drill steel matrix, send into hot pressed sintering in middle frequency furnace, its hot pressing temperature is 960～970 DEG C, and hot pressing pressure is 18～20MPa, and temperature retention time is 5～6min, come out of the stove and be placed on slow cooling under heat-retaining condition and, to room temperature, complete the manufacture of this drill bit.
The carcass metal material powder that contains adhesive in described step (1), its weight percentages of components is: Ni accounts for 12%～16%, Fe and accounts for 28%～32%, Cu-Re alloy and account for 32%～36%, YG8 and account for 12%～18%, Mn and account for 2%～4%.
The hardness of the carcass metal material powder in described step (1) is HRC30～HRC35, and abrasion resistance is (0.36～0.42) × 10
-5mL.
The pressure of colding pressing in described step (1) is 200MPa, and the dwell time is 5s.
Hot pressing temperature in described step (2) is 960 DEG C, and hot pressing pressure is 18MPa, and temperature retention time is 5min.
Tapping temperature after hot pressing insulation in described step (2) is 820 DEG C.
The coarse gold hard rock of selected vacuum brazing method polymerization in described step (1), its particle diameter is 1.2～2.0mm.
Beneficial effect of the present invention:
Technique of the present invention is simpler, and operation is easier to, and it is good that its product creeps into performance, long service life.The structure of this product best embodies the general principle of drill bit rotary drilling fractured rock, can give full play to catalase cave effect, thereby fractured rock efficiency is high, therefore this structure drill bit is conducive to improve the drilling efficiency of drill bit and improves the conformability of drill bit to rock stratum.Drilling test shows that the obtained timeliness of creeping into is higher by 22%～27% than common diamond bit, wants high by 18～20% the application life of drill bit, and this is the characteristics and advantages that other common diamond bit does not have.This diamond bit can be used for geological prospecting, oil drilling, Science Drilling and engineering investigation, also can be used for the improvement of geological disaster simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of cold moudling polymerization coarse gold hard rock cutting unit thin layer and operation block in the present invention; Wherein: (A) be polymerization coarse gold hard rock cutting unit thin layer; (B) the fan-shaped cutwork piece for being combined into by the polymerization coarse gold hard rock cutting unit thin layer of multilayer different size.
Fig. 2 is labial surface structural representation at the bottom of hot-press polymerized coarse-grain diamond drill bit;
Fig. 3 is the I-I sectional structure schematic diagram of Fig. 2.
In above accompanying drawing, the corresponding relation of each label and component is:
1-soldering polymerization coarse gold hard rock; 2-plates the adamantine carcass metal material powder of polymerization coarse grain; 3-polymerization coarse gold hard rock cutting unit thin layer; The fan-shaped cutwork piece of drill bit that 4-is combined into by different size, multilayer polymeric coarse gold hard rock cutting unit thin layer; The 5-hot-press polymerized coarse-grain diamond drill bit mouth of a river; 6-hot-press polymerized coarse-grain diamond drill bit steel matrix; 7-hot-press polymerized coarse-grain diamond drill bit weld layer metal powder material; The cutwork body that 8-is made up of each cutwork piece 4.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Consult Fig. 2, the present invention is to manufacture φ 77/47mm specification drill bit as example, and its drill bit mouth of a river is 8, and drill bit has 8 fan-shaped cutwork pieces 4 of polymerization coarse gold hard rock, and each fan-shaped cutwork piece is combined by 6 layers of cutting unit thin layer 3.And every layer of thick 1.6mm of cutting unit thin layer, the adamantine particle diameter of polymerization coarse grain of employing is 1.2mm.Its internal-and external diameter radian specification is according to the type of drill bit, specification and different, by calculating.
Hot-press polymerized coarse-grain diamond drill bit manufacturing process:
By the coarse gold hard rock 1 of method for brazing polymerization according to the specification arranged distribution designing in the hole of template, then sticking with glue paper immigration colds pressing in steel mould, a certain amount of carcass material powder that contains adhesive 2 evenly dispense in polymerization coarse gold hard rock 1 above, the moulding by the compacting of cold press, become bit cutting unit thin layer 3, now, polymerization coarse gold hard rock 1 is just evenly distributed in this fan-shaped cutting unit thin layer 3 regularly.
In cutting unit thin layer 3, plating adamantine carcass powder 2 and proportioning is: nickel accounts for 14%, and iron accounts for 32%, and copper alloy accounts for 36%, YG8 and accounts for 15%, and manganese accounts for 3%.The pressure of colding pressing is 200MPa, pressurize 5s.
By different specification, in layer fan-shaped cutting unit thin layer 3 vertically packs in graphite jig after superposeing, and forms a fan-shaped cutwork piece 4 of drill bit.A drill bit (taking φ 77/47mm specification drill bit as example) has 8 fan-shaped cutwork pieces.After whole drill bit has been assembled, add weld layer metal powder material 7, press drill steel matrix 6, to send in middle frequency furnace hot-formingly, hot pressing parameters is: 960 DEG C of temperature, pressure 18MPa, temperature retention time 5min; Come out of the stove for 820 DEG C.Drill bit after coming out of the stove is placed in that under heat-retaining condition, slow cooling is to room temperature, and this drill bit has been manufactured.
In above-mentioned technique, because drill steel matrix 6 is steel material, and cutwork piece 4 is diamantiferous alloy material, and this bi-material is difficult for firmly connecting; The object that adds weld layer metal powder material 7 is that whole cutwork body 8 and drill steel matrix 6 is can high-intensity welding as a whole; Meanwhile, weld layer can effectively improve the gauge effect of drill bit.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.If these amendments of the present invention and modification are belonged to the scope of basic conception of the present invention or equivalent technologies, the present invention also should comprise these changes and modification interior.
If there is the content not being described in detail in this manual, belong to the known technology of professional and technical personnel in the field, repeat no more herein.
Claims (5)
1. a manufacture method for hot-press polymerized coarse-grain diamond drill bit, is characterized in that: main technological steps is:
(1) selected raw material is the coarse gold hard rock of vacuum brazing method polymerization, on steel mould, get out regular aperture of arranging according to design and requirement, polymerization coarse gold hard rock is inserted in the aperture of steel mould, the carcass metal material powder that contains adhesive on covering again, on cold press, suppress, its pressure of colding pressing is 180～220MPa, and the dwell time is 5～8s, can precast the fan-shaped cutting unit thin layer of polymerization coarse gold hard rock of different size; Wherein, the adamantine particle diameter of coarse grain of described vacuum brazing method polymerization is 1.2～2.0mm; The described carcass metal material powder that contains adhesive, its weight percentages of components is: Ni accounts for 12%～16%, Fe and accounts for 28%～32%, Cu-Re alloy and account for 32%～36%, YG8 and account for 12%～18%, Mn and account for 2%～4%;
(2) by fan-shaped polymerization coarse gold hard rock cutting unit thin layer, successively superpose and pack in graphite jig to little from large by external diameter, the fan-shaped cutwork piece of composition drill bit, each fan-shaped cutwork piece is radially vertically arranged in a combination along drill bit by the different fan-shaped cutting unit thin layer of 5～8 layers of polymer coarse gold hard rock of specification; Whole fan-shaped cutwork pieces pack weld layer metal powder material into after having assembled, and press drill steel matrix, send into hot pressed sintering in middle frequency furnace, and its hot pressing temperature is 960～970 DEG C, and hot pressing pressure is 18～20MPa, and temperature retention time is 5～6min; Come out of the stove and be placed on slow cooling under heat-retaining condition and, to room temperature, complete the manufacture of drill bit.
2. the manufacture method of hot-press polymerized coarse-grain diamond drill bit according to claim 1, is characterized in that: the hardness of the carcass metal material powder in described step (1) is HRC30～HRC35, and abrasion resistance ML is (0.36～0.42) × 10
-5.
3. the manufacture method of hot-press polymerized coarse-grain diamond drill bit according to claim 1, is characterized in that: the pressure of colding pressing in described step (1) is 200MPa, and the dwell time is 5s.
4. the manufacture method of hot-press polymerized coarse-grain diamond drill bit according to claim 1, is characterized in that: the hot pressing temperature in described step (2) is 960 DEG C, and hot pressing pressure is 18MPa, and temperature retention time is 5min.
5. the manufacture method of hot-press polymerized coarse-grain diamond drill bit according to claim 1, is characterized in that: the tapping temperature after the hot pressing insulation in described step (2) is 820 DEG C.
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| CN201110392614.5A CN102587838B (en) | 2011-12-01 | 2011-12-01 | Manufacturing method of hot-press polymerized coarse-grain diamond drill bit |
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| CN201110392614.5A CN102587838B (en) | 2011-12-01 | 2011-12-01 | Manufacturing method of hot-press polymerized coarse-grain diamond drill bit |
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| CN102587838B true CN102587838B (en) | 2014-06-04 |
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| CN102767336B (en) * | 2012-07-24 | 2015-05-06 | 武汉万邦激光金刚石工具有限公司 | Manufacture method of hot-pressing ordered-arranged broken polycrystalline impregnated bits |
| CN108691509A (en) * | 2018-03-21 | 2018-10-23 | 武汉万邦激光金刚石工具股份有限公司 | Diamond bit and preparation method thereof for engineering investigation |
| CN114951660B (en) * | 2022-05-17 | 2023-03-28 | 中国地质大学（武汉） | Method for preparing diamond-impregnated wedge-shaped cutting teeth and embedding drill bit and application |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478990A (en) * | 2003-07-10 | 2004-03-03 | 中国地质大学（武汉） | Diamond-hard alloy composite type coring bit and its manufacturing process |
| CN101591812A (en) * | 2009-06-02 | 2009-12-02 | 武汉万邦激光金刚石工具有限公司 | The manufacture craft of brazing diamond polycrystal and mould therefor thereof |
| CN101725324A (en) * | 2009-11-26 | 2010-06-09 | 中国地质大学（武汉） | Hot pressing diamond bit and manufacturing method thereof |
| CN102182405A (en) * | 2011-04-01 | 2011-09-14 | 龚宏伟 | Layered composite type diamond drill bit and manufacturing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8771389B2 (en) * | 2009-05-06 | 2014-07-08 | Smith International, Inc. | Methods of making and attaching TSP material for forming cutting elements, cutting elements having such TSP material and bits incorporating such cutting elements |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478990A (en) * | 2003-07-10 | 2004-03-03 | 中国地质大学（武汉） | Diamond-hard alloy composite type coring bit and its manufacturing process |
| CN101591812A (en) * | 2009-06-02 | 2009-12-02 | 武汉万邦激光金刚石工具有限公司 | The manufacture craft of brazing diamond polycrystal and mould therefor thereof |
| CN101725324A (en) * | 2009-11-26 | 2010-06-09 | 中国地质大学（武汉） | Hot pressing diamond bit and manufacturing method thereof |
| CN102182405A (en) * | 2011-04-01 | 2011-09-14 | 龚宏伟 | Layered composite type diamond drill bit and manufacturing process thereof |
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Address after: 280-8 No. 430056 Hubei city of Wuhan Province, Wuhan City Economic and Technological Development Zone Avenue Patentee after: Wuhan Wan Bang Laser Diamond Tools Co.,Ltd. Address before: 280-8 No. 430056 Hubei city of Wuhan Province, Wuhan City Economic and Technological Development Zone Avenue Patentee before: Wuhan Wan Bang Laser Diamond Tools Co.,Ltd. |
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