WO2015122653A1 - Comprimé de diamant polycristallin et procédé de préparation s'y rapportant - Google Patents

Comprimé de diamant polycristallin et procédé de préparation s'y rapportant Download PDF

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Publication number
WO2015122653A1
WO2015122653A1 PCT/KR2015/001231 KR2015001231W WO2015122653A1 WO 2015122653 A1 WO2015122653 A1 WO 2015122653A1 KR 2015001231 W KR2015001231 W KR 2015001231W WO 2015122653 A1 WO2015122653 A1 WO 2015122653A1
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WO
WIPO (PCT)
Prior art keywords
polycrystalline diamond
cemented carbide
chip breaker
diamond compact
carbide substrate
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Application number
PCT/KR2015/001231
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English (en)
Korean (ko)
Inventor
이상용
박희섭
Original Assignee
일진다이아몬드 주식회사
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Publication of WO2015122653A1 publication Critical patent/WO2015122653A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5671—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts with chip breaking arrangements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes

Definitions

  • the present invention relates to a polycrystalline diamond compact, and more particularly, to a diamond compact structure and a method of manufacturing the same that can improve the working efficiency.
  • a cutting tool 1 As shown in FIG. 1, it is common to use a diamond sintered body 2 so that wear resistance can be sufficiently ensured despite friction with the ground.
  • the polycrystalline diamond compact includes a polycrystalline diamond sintered body 3 sintered using a diamond powder on the cemented carbide layer 4 and the cemented carbide substrate 4.
  • the cemented carbide substrate 4 functions to support the polycrystalline diamond compact 2 so that the polycrystalline diamond compact 2 can be attached to various tools and the like in the state in which the polycrystalline diamond sintered body 3 is attached.
  • the cutting powder that is, chips (chips) are generated in the cutting process. If these chips accumulate on the work surface, the work efficiency is reduced.
  • the polycrystalline diamond sintered body is inferior in workability, it is difficult to form the chip breaker directly, and a special method such as laser processing must be used.
  • the present invention provides a polycrystalline diamond compact and a method of manufacturing the same that can improve the efficiency of cutting by improving the fluidity of the cutting powder, ie, chips, generated during cutting.
  • the present invention is a polycrystalline diamond compact having a polycrystalline diamond sintered body only in the edge portion directly involved in the cutting process, the portion where the chip breaker is formed by using a cemented carbide or other materials to improve workability and manufacturability It provides a method of manufacturing.
  • the present invention provides a polycrystalline diamond compact and a method for manufacturing the same, in which the polycrystalline diamond sintered body is formed in only one portion in the circumferential direction so that the bonding force is enhanced so that the polycrystalline diamond sintered body and the cemented carbide substrate are not separated even during cutting.
  • Polycrystalline diamond compact according to the present invention is a cemented carbide layer; A polycrystalline diamond sintered part formed only in a region including at least a portion of an edge of the cemented carbide layer; And a chip breaker which is formed in a groove shape on the inner side of the upper surface of the cemented carbide layer and the polycrystalline diamond sintered part to shortly cut or wind a spring generated during operation.
  • chip breaker may be integrally formed with the cemented carbide layer.
  • the chip breaker may be formed of a hard metal material.
  • the chip breaker may be fixed in a brazing manner on the cemented carbide substrate.
  • the chip breaker may have a groove-shaped breaking groove formed in at least a portion of a radius of a certain radius based on the central axis of the cemented carbide layer.
  • the breaking groove may be formed at a position corresponding to the sintered portion radially.
  • the breaking groove may be formed in a groove shape around a point of a predetermined radius with respect to the central axis of the cemented carbide layer.
  • the chip breaker may be formed in a plate shape having a cross-sectional shape of any one of polygons or circles, and a breaking groove may be formed in a groove shape having a predetermined length on an upper surface of the chip breaker.
  • an inclined surface may be formed on at least one of both sides of the breaking groove.
  • the polycrystalline diamond compact manufacturing method comprises the steps of preparing and sintering by mixing and assembling the polycrystalline diamond particles and metal binder particles on the cemented carbide substrate; A sintering step of sintering the assembled mixed particles; And forming a chip breaker on the cemented carbide substrate having a smaller cross sectional area than that of the upper surface of the cemented carbide substrate. It includes.
  • the forming of the chip breaker may be a step of manufacturing the cemented carbide substrate so that the chip breaker is integrally formed on the cemented carbide substrate.
  • the forming of the chip breaker may be a step of forming and brazing the cemented carbide substrate and the chip breaker as separate members.
  • the step of assembling the mixed particles of the polycrystalline diamond particles and the metal binder particles may further comprise the step of pre-sintering the mixed particles to form a predetermined shape.
  • the efficiency of cutting can be improved by improving the fluidity of the cutting powder, ie, the chip, generated during cutting.
  • the polycrystalline diamond sintered body is provided only in the edge portion directly related to the cutting process, and the portion where the chip breaker is formed is formed by using cemented carbide or other materials to improve workability and manufacturability.
  • the polycrystalline diamond sintered body is formed in only one portion in the circumferential direction, so that the bonding force can be enhanced so that the polycrystalline diamond sintered body and the cemented carbide substrate are not separated even during cutting.
  • FIG. 1 is a schematic diagram showing a state of a cutting tool using a polycrystalline diamond compact.
  • FIG. 2 is a perspective view showing a state of a conventional polycrystalline diamond compact.
  • FIG. 3 is a perspective view showing the state of the polycrystalline diamond compact according to an embodiment of the present invention.
  • FIG. 4 and 5 are a plan view and a cross-sectional view showing a polycrystalline diamond compact according to FIG. 3, respectively.
  • 6 and 7 are a perspective view and a plan view showing a polycrystalline diamond compact according to another embodiment.
  • FIG 8 and 9 are a perspective view and an exploded perspective view showing a polycrystalline diamond compact according to another embodiment.
  • FIGS. 10 and 11 are perspective views each showing a polycrystalline diamond compact according to yet another embodiment.
  • FIG. 12 is a flowchart sequentially illustrating a method of manufacturing a polycrystalline diamond compact, according to an exemplary embodiment.
  • Polycrystalline diamond compact according to the present invention is a cemented carbide layer; A polycrystalline diamond sintered part formed only in a region including at least a portion of an edge of the cemented carbide layer; And a chip breaker which is formed in a groove shape on the inner side of the upper surface of the cemented carbide layer and the polycrystalline diamond sintered part to shortly cut or wind a spring generated during operation.
  • FIGS. 3 to 5 A polycrystalline diamond compact according to an embodiment will be described with reference to FIGS. 3 to 5.
  • 3 is a perspective view showing a state of the polycrystalline diamond compact according to an embodiment of the present invention
  • Figures 4 and 5 are a plan view and a cross-sectional view showing a different polycrystalline diamond compact in FIG.
  • the polycrystalline diamond compact 20 includes a cemented carbide substrate 24, a polycrystalline diamond sintered part 23, and a chip breaker 25.
  • the cemented carbide substrate 24 is a substrate made of cemented carbide and functions to support the diamond compact 2 to be attached to various tools and the like in the state in which the polycrystalline diamond sintered portion 23 is attached.
  • Cemented carbide is an ultrahard alloy used in tools and the like and is a very hard alloy made by firing metal carbide powder. The alloy of such a structure is very hard and wear-resistant, so it can be used to cut or cut metal products such as cutters or dies.
  • the polycrystalline diamond sintered part 23 is formed by mixing and sintering a polycrystalline diamond powder and a metal catalyst (binder) powder.
  • the polycrystalline diamond sintered part 23 acts as an edge part at the time of a cutting operation, and cuts a process object in the state which directly contacted a process object.
  • the polycrystalline diamond sintered portion 23 according to the present embodiment is provided only on the upper edge portion side of the polycrystalline diamond compact 20 formed in a cylindrical shape. That is, the polycrystalline diamond sintered portion 23 according to the present embodiment is formed in a ring shape with an edge formed.
  • the chip breaker 25 is provided inside the polycrystalline diamond sintered part 23 and the upper surface of the polycrystalline diamond compact 20.
  • the chip breaker 25 has a breaking groove 251 formed on an upper surface thereof.
  • the breaking groove 251 is formed in a groove shape along the circumferential direction at a distance from the central axis. The breaking groove 251 functions to shortly cut the chip generated during the operation or to wind the spring.
  • the upper layer on the cemented carbide support substrate is composed entirely of a polycrystalline diamond sintered layer.
  • the edge area of the drill bit the upper part of the inner edge of the drill bit does not act as a cutting edge for actual machining.
  • PCD solid polycrystalline diamond
  • the upper surface excluding the edge of the entire polycrystalline diamond compact is composed of cemented carbide or other material other than polycrystalline diamond, the impact of crack propagation due to the impact of the edge part due to the upper surface contact of the workpiece during drilling or drilling Since the processing load on the upper surface of the polycrystalline diamond compact is less during the manufacturing process of the polycrystalline diamond compact, the manufacturing time and the cost of the processing material can be reduced, thereby increasing the manufacturing efficiency.
  • the toughness of the diamond is improved.
  • the chip breaker 25 may improve chip flow due to chip generation of the workpiece.
  • the chip breaker 25 is formed of a cemented carbide or other similar material, thereby improving workability as compared to improving the chip breaker 25 directly to the polycrystalline diamond sintered part 23.
  • FIGS. 6 and 7 are a perspective view and a plan view showing a polycrystalline diamond compact according to another embodiment.
  • the polycrystalline diamond compact 20a according to the present embodiment is different from the polycrystalline diamond compact described above in terms of the formation position of the polycrystalline diamond sintered portion 23a and the breaking groove 251a.
  • the polycrystalline diamond sintered portion 23a according to the present embodiment is provided over about half of the cylindrical upper edge portion.
  • the degree of wear during the cutting operation is judged so that the operation can be performed by turning the polycrystalline diamond compact by turning the polycrystalline diamond compact.
  • the polycrystalline diamond compact 23a is replaced with the other polycrystalline diamond compact 23a instead of extending the expiration date of the polycrystalline diamond compact.
  • the polycrystalline diamond sintered part 23a may not only bear the load in the vertical direction but also the load in the transverse direction or the rotation direction so that the cemented carbide substrate 24 and the chip breaker ( It is supported by 25a). That is, in the above-described embodiment, the polycrystalline diamond sintered layer is supported by the cemented carbide substrate and thus has resistance only to the load in the vertical direction. It is supported by 24, and is supported by the chip breaker 25a formed integrally with the cemented carbide substrate 24 or fixed on the cemented carbide substrate 24 in the lateral or rotational direction.
  • the surface area formed of a metal material such as cemented carbide is increased as compared with the previous embodiment, thereby making it easier to fix the drill bit.
  • the polycrystalline diamond sintered portion 23a and the breaking groove 251a may be formed at mutually radially corresponding positions, and their lengths and numbers may be variously formed.
  • the polycrystalline diamond sintered portion 23a may be formed at any part of the upper edge irrespective of the length, and may be formed at a short length such as one third of the length of the polycrystalline diamond sintered portion 20a. It is also possible to form a large number.
  • the chip breaker and the cemented carbide substrate are integrally formed, but the chip breaker and the cemented carbide substrate may be formed as separate members and then connected through brazing.
  • 8 and 9 are a perspective view and an exploded perspective view showing a polycrystalline diamond compact according to another embodiment.
  • the breaking groove 251b formed in the chip breaker 25b may be formed in various shapes such as a polygonal shape as well as a circular groove.
  • the breaking groove 251 b according to the present embodiment may be formed in a hexagonal shape as shown in FIG. 8.
  • the shape of the breaking groove 251 b may be formed in various shapes or directions according to the type and characteristic of the work.
  • the chip breaker 25b may be manufactured as a member separated from the cemented carbide substrate 24, as shown in FIG.
  • the inner circumferential surface shape of the polycrystalline diamond sintered portion 23b formed outside the chip breaker 25b is formed to correspond to the shape of the outer circumferential surface of the chip breaker 25b.
  • the chip breaker 25b is first brazed on the cemented carbide substrate 24 and then sintered using a mixed powder in which the polycrystalline diamond powder and the powder of the metal binder (catalyst) are mixed. Can be formed.
  • the diamond mixed powder may be sintered and formed.
  • 10 and 11 are perspective views each showing a polycrystalline diamond compact according to yet another embodiment.
  • the chip breaker may be formed in various shapes.
  • by forming a curved surface on the inner surface of the breaking groove 251c it is possible to improve the efficiency of chip breaking.
  • the inner surface of the groove of the breaking groove 251c may be concave in the central axis direction, thereby forming a star-shaped groove inner surface as a whole.
  • the direction and the degree of movement of the chip during the cutting operation can be adjusted.
  • an inclined surface having a gentle inclination may be formed on the inner surface 2511d of the breaking groove 251d. That is, by adjusting the inclination of the inner surface of the breaking groove (251d) it is possible to adjust the direction or degree of movement of the chips generated during cutting.
  • FIG. 12 is a flowchart sequentially illustrating a method of manufacturing a polycrystalline diamond compact, according to an exemplary embodiment.
  • Polycrystalline diamond compact manufacturing method comprises the steps of preparing and sintering by mixing and assembling the polycrystalline diamond particles and metal binder particles on the cemented carbide substrate (S10), and the sintering step (S20) for sintering the assembled mixed particles and And forming a chip breaker having a smaller transverse area on the cemented carbide substrate than the area of the upper surface of the cemented carbide substrate (S30).
  • the polycrystalline diamond particles and the metal binder particles are mixed and assembled on the cemented carbide substrate to prepare for sintering. At this time, it is also possible to maintain a constant shape by pre-sintering the polycrystalline diamond particles and metal binder particles in advance for ease of assembly.
  • the cemented carbide substrate may be manufactured so that the chip breaker is integrally formed on the cemented carbide substrate, or the cemented carbide substrate and the chip breaker may be formed as separate members and then brazed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

La présente invention concerne un comprimé de diamant polycristallin. En particulier, le comprimé de diamant polycristallin, selon la présente invention, comprend : une couche de carbure métallique ; une partie frittée en diamant polycristallin formée sur uniquement une zone comprenant au moins une partie parmi les parties de bord de la couche de carbure métallique ; et un brise-copeaux mis sous forme de rainure sur son côté intérieur par rapport à la surface supérieure de la couche de carbure métallique et de la partie frittée en diamant polycristallin, de manière à couper des copeaux, produits au cours de l'usinage, en petits copeaux ou enrouler les copeaux sous forme de ressort. Selon la présente invention, l'aptitude à l'écoulement des copeaux, c'est-à-dire des morceaux coupés produits au cours d'un processus de coupe, est améliorée, ce qui permet d'augmenter l'efficacité du processus de coupe. Un corps fritté en diamant polycristallin est disposé sur uniquement la partie de bord directement concernée par l'opération de coupe et une partie sur laquelle le brise-copeaux est formé est formée à l'aide de métal de carbure métallique ou d'autres matériaux de telle sorte que l'usinabilité et la fabricabilité sont améliorées.
PCT/KR2015/001231 2014-02-14 2015-02-06 Comprimé de diamant polycristallin et procédé de préparation s'y rapportant WO2015122653A1 (fr)

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KR1020140016984A KR20150096542A (ko) 2014-02-14 2014-02-14 다결정 다이아몬드 컴팩트 및 그 제조방법
KR10-2014-0016984 2014-02-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11840891B2 (en) 2018-08-24 2023-12-12 Schlumberger Technology Corporation Cutting elements with modified diamond surface

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111764829A (zh) * 2019-04-01 2020-10-13 成都百施特金刚石钻头有限公司 一种塑性地层用聚晶金刚石复合片
US11719050B2 (en) * 2021-06-16 2023-08-08 Baker Hughes Oilfield Operations Llc Cutting elements for earth-boring tools and related earth-boring tools and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561810A (en) * 1981-12-16 1985-12-31 General Electric Company Bi-level cutting insert
US5370717A (en) * 1992-08-06 1994-12-06 Lloyd; Andrew I. G. Tool insert
JP2004291040A (ja) * 2003-03-27 2004-10-21 Mitsubishi Materials Corp 超硬合金製部材とダイヤモンド製部材との接合方法、接合構造、掘削工具の切刃片、切刃部材、及び掘削工具
US20100307829A1 (en) * 2009-06-05 2010-12-09 Baker Hughes Incorporated Cutting elements including cutting tables with shaped faces configured to provide continuous effective positive back rake angles, drill bits so equipped and methods of drilling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561810A (en) * 1981-12-16 1985-12-31 General Electric Company Bi-level cutting insert
US5370717A (en) * 1992-08-06 1994-12-06 Lloyd; Andrew I. G. Tool insert
JP2004291040A (ja) * 2003-03-27 2004-10-21 Mitsubishi Materials Corp 超硬合金製部材とダイヤモンド製部材との接合方法、接合構造、掘削工具の切刃片、切刃部材、及び掘削工具
US20100307829A1 (en) * 2009-06-05 2010-12-09 Baker Hughes Incorporated Cutting elements including cutting tables with shaped faces configured to provide continuous effective positive back rake angles, drill bits so equipped and methods of drilling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11840891B2 (en) 2018-08-24 2023-12-12 Schlumberger Technology Corporation Cutting elements with modified diamond surface

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