JPS6156749B2 - - Google Patents
Info
- Publication number
- JPS6156749B2 JPS6156749B2 JP14008881A JP14008881A JPS6156749B2 JP S6156749 B2 JPS6156749 B2 JP S6156749B2 JP 14008881 A JP14008881 A JP 14008881A JP 14008881 A JP14008881 A JP 14008881A JP S6156749 B2 JPS6156749 B2 JP S6156749B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- diamond sintered
- bit
- layer
- drilling bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910003460 diamond Inorganic materials 0.000 claims description 64
- 239000010432 diamond Substances 0.000 claims description 64
- 238000005553 drilling Methods 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 17
- 238000009412 basement excavation Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000000737 periodic effect Effects 0.000 claims description 5
- 150000001247 metal acetylides Chemical class 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- 238000005219 brazing Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 2
- 229910052748 manganese Inorganic materials 0.000 claims 2
- 150000002739 metals Chemical class 0.000 claims 2
- 229910052759 nickel Inorganic materials 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- -1 iron group metals Chemical class 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
本発明はダイヤモンドを主体としたダイヤモン
ド焼結体が超硬合金などよりなる支持部材と結合
された複合ダイヤモンド焼結体を刃先に有する掘
削ビツトの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a drilling bit having a composite diamond sintered body on its cutting edge, in which a diamond sintered body mainly composed of diamond is bonded to a support member made of cemented carbide or the like.
従来、石油、天然ガス、地熱などの地下資源利
用のため、石油井、地熱井の掘削が行われてい
る。掘削にはドリルビツトと称する掘削用具が用
いられ、この刃先材料として超硬合金が主に用い
られてきた。 Conventionally, oil wells and geothermal wells have been drilled to utilize underground resources such as oil, natural gas, and geothermal heat. A drilling tool called a drill bit is used for drilling, and cemented carbide has been mainly used as the cutting edge material.
ところが地層の中でも比較的軟質の堆積層では
超硬合金製ドリルビツトで充分な掘削能率とビツ
ト寿命が得られるが、堆積層でも硬質のものや、
火成岩では非常にビツト寿命が短かく殆んど掘削
できない場合もあるのが実情であつた。 However, although a drill bit made of cemented carbide can provide sufficient drilling efficiency and long bit life in relatively soft sedimentary layers, even in hard sedimentary layers,
The reality is that in igneous rocks, the bit life is so short that in some cases it is almost impossible to excavate.
さてこのような硬質地層掘削用のビツト刃先材
料としてダイヤモンド粒子を超高圧下で焼結した
多結晶焼結ダイヤモンドが開発され使用され出し
ている。 Now, polycrystalline sintered diamond, which is made by sintering diamond particles under ultra-high pressure, has been developed and is being used as a cutting edge material for bits used in hard geological excavation.
多結晶焼結ダイヤモンドは、最初、金属材料切
削用工具として開発され、第１図に示すような多
結晶ダイヤモンド層１が超硬合金層２に接合され
た形のものが使用されていた。 Polycrystalline sintered diamond was first developed as a tool for cutting metal materials, and a tool in which a polycrystalline diamond layer 1 was bonded to a cemented carbide layer 2 as shown in FIG. 1 was used.
掘削用途用のものも第１図とほぼ同じ形のもの
が使用され、これを刃先に固着した掘削用ビツト
が使用されている。 Bits for excavation are also used, having a shape almost the same as that shown in Figure 1, and are used as drilling bits with this bit fixed to the cutting edge.
ところが、掘削用途では通常の金属切削と異な
り掘削時に非常に大きな衝撃が刃先に加わり、か
つ地層が硬質である場合に刃先に対する摩耗作用
も非常に厳しい。 However, in excavation applications, unlike ordinary metal cutting, a very large impact is applied to the cutting edge during excavation, and if the stratum is hard, the abrasion effect on the cutting edge is also very severe.
この内掘削時の衝撃が大きいのが特に問題で、
このため第２図のビツトにより掘削した際刃先の
焼結ダイヤモンド層が大きく欠損してしまいビツ
トが使用に耐えなくなつてしまうのがこれまでの
焼結ダイヤモンドを使用した掘削ビツトの最大の
問題であつた。 A particular problem is that the impact during excavation is large.
For this reason, when drilling with the bit shown in Figure 2, the sintered diamond layer on the cutting edge is severely damaged, making the bit unusable, which is the biggest problem with conventional drilling bits that use sintered diamond. It was hot.
本発明はこのような従来の焼結ダイヤモンドを
使用した掘削ビツトの欠点を改良し、刃先の焼結
ダイヤモンド層の大欠けが生じない長寿命掘削ビ
ツトを提供するものである。 The present invention aims to improve the drawbacks of conventional drilling bits using sintered diamond, and provide a long-life drilling bit in which the sintered diamond layer at the cutting edge does not suffer from major chipping.
本発明はダイヤモンドを60容量％以上含むダイ
ヤモンド焼結体と該ダイヤモンド焼結体の上下両
面全面に支持部材が直接に、あるいは中間接合層
を介して結合されている複合ダイヤモンド焼結体
をビツト本体に鑞付け、圧入その他適当な方法に
より埋め込み固着して刃先材料としたことを特徴
とする掘削ビツトである。 The present invention provides a bit body comprising a diamond sintered body containing 60% by volume or more of diamond, and a composite diamond sintered body in which support members are bonded to the entire upper and lower surfaces of the diamond sintered body either directly or through an intermediate bonding layer. This drilling bit is characterized in that the cutting edge material is embedded and fixed by brazing, press-fitting, or other suitable methods.
さて、本発明掘削ビツトの効果を第２図により
説明する。 Now, the effects of the drilling bit of the present invention will be explained with reference to FIG.
第２図は本発明による掘削ビツトの頭部の１つ
の複合ダイヤモンド焼結体刃先に注目したもの
で、第２図イに示すように両面に支持部材２，３
を有する複合ダイヤモンド焼結体５がビツト本体
４に埋め込み固着されている。 FIG. 2 focuses on one composite diamond sintered cutting edge of the head of the drilling bit according to the present invention, and as shown in FIG.
A composite diamond sintered body 5 having a diameter is embedded and fixed in the bit body 4.
この状態ではダイヤモンド焼結体刃先は穏れて
おり、支持部材３が上面に出ている。この状態で
掘削を開始すると支持部材３が超硬合金である場
合には、最初は支持部材超硬合金層で掘削を行
う。ところが硬質岩層になると表面の超硬合金支
持部材層は摩耗してしまい下層のダイヤモンド焼
結体層があらわれてこれで掘削を行うようにな
る。支持部材がａ、ａ、ａ族その他の金属
層である場合は、金属層の摩耗が早期に生じ、す
ぐ下部のダイヤモンド焼結体層があらわれる。こ
の状態を模式的に示したものが第２図ロである。
上部支持部材３が摩耗して下部のダイヤモンド焼
結体１があらわれ、その刃先１１が掘削作用を行
うようになる。 In this state, the cutting edge of the diamond sintered body is smooth, and the support member 3 is exposed on the upper surface. When excavation is started in this state, if the support member 3 is made of cemented carbide, excavation is first performed in the support member cemented carbide layer. However, when it comes to hard rock layers, the cemented carbide support member layer on the surface wears away, revealing the underlying diamond sintered body layer, which is used for excavation. When the supporting member is a metal layer of group A, A, group A, or other metal layer, the metal layer wears out quickly, and the diamond sintered body layer immediately below is exposed. This state is schematically shown in FIG. 2B.
As the upper support member 3 wears away, the lower diamond sintered body 1 appears, and its cutting edge 11 begins to perform an excavating action.
こうするとダイヤモンド焼結体層は掘削作用を
行うに必要なだけの切刃が露出し、他の部分は支
持部材３に覆われていることになる。 In this way, only the cutting edge of the diamond sintered body layer necessary for performing the excavation action is exposed, and the other portions are covered by the support member 3.
支持部材３はダイヤモンド焼結体１に比べてね
ばい。このため刃先１１に大きな衝撃力が加わつ
て欠けが発生しても亀裂は支持部材３で覆われて
いる領域には進展せず、従つて大きな欠損によつ
てこのダイヤモンド焼結体層が使用不能になつて
しまうということがない。 The support member 3 is more sticky than the diamond sintered body 1. Therefore, even if a large impact force is applied to the cutting edge 11 and a chip occurs, the crack will not propagate to the area covered by the support member 3, and the diamond sintered body layer will become unusable due to the large chip. I never get used to it.
さて、この支持部材による大欠損防止効果は支
持部材３とダイヤモンド焼結体１とが強個に接合
していればいる程大となる。 Now, the effect of preventing large chipping by this support member becomes greater as the support member 3 and the diamond sintered body 1 are more strongly joined together.
この点で支持部材とダイヤモンド焼結体層が直
接接合している場合はやや問題がある。 In this respect, there is a slight problem when the supporting member and the diamond sintered body layer are directly joined.
すなわち、ダイヤモンド焼結体と支持部材が直
接接合した状態でこれを焼結しようとすると焼結
中にダイヤモンドを構成する炭素が支持部材中に
拡散し、このために界面近傍の支持部材中に炭化
物を形成するなどして界面近傍の支持部材が脆く
なり、このためダイヤモンド焼結体と支持部材の
結合強度がやや低下する。 In other words, if an attempt is made to sinter a diamond sintered body and a supporting member in a state where they are directly joined, the carbon that makes up the diamond will diffuse into the supporting member during sintering, and as a result, carbides will form in the supporting member near the interface. The supporting member near the interface becomes brittle due to the formation of a diamond sintered body, and the bonding strength between the diamond sintered body and the supporting member decreases slightly.
この界面反応を生じさせず、かつダイヤモンド
焼結体、支持部材相互と強固に接合する中間接合
層を用いてやればこの問題は解決し、より好まし
いものとなる。 This problem can be solved by using an intermediate bonding layer that does not cause this interfacial reaction and firmly bonds the diamond sintered body and the support member to each other, which is more preferable.
このような中間接合層として、立方晶窒化硼素
（CBN）の含有率が70容量％以下で、残部が周期
律表ａ族のTi、Zr、Hfの炭化物、窒化物、炭
窒化物あるいは硼化物の一種もしくはこれらの混
合物または相互固溶体化合物を主体としたものと
これにAlおよび／またはSiを0.1重量％以上含有
させたものが適している。この中間層が適してい
るのは比較的低温で支持部材、ダイヤモンド焼結
体相方と強固な接合を形成し、かつ耐熱性にもす
ぐれていることによる。 As such an intermediate bonding layer, the content of cubic boron nitride (CBN) is 70% by volume or less, and the remainder is a carbide, nitride, carbonitride, or boride of Ti, Zr, or Hf from Group A of the Periodic Table. or a mixture thereof, or a mutual solid solution compound, and a material containing Al and/or Si in an amount of 0.1% by weight or more are suitable. This intermediate layer is suitable because it forms a strong bond with the supporting member and the diamond sintered body partner at a relatively low temperature, and also has excellent heat resistance.
さて、このダイヤモンド焼結体層の大欠損を防
止する支持部材の厚みは、ダイヤモンド焼結体層
の厚み以下であればよい。ダイヤモンド焼結体層
は通常0.5〜1.0mm程度であるが、支持部材の厚み
がこれ以上あると先に説明した第２図ロのように
ダイヤモンド焼結体層が一部露出した状態となつ
たとき、この支持部材が掘削した岩石の小片の流
出を却つて妨げる状態になる可能性があるからで
ある。 Now, the thickness of the support member that prevents large defects in the diamond sintered body layer may be equal to or less than the thickness of the diamond sintered body layer. The diamond sintered layer is usually about 0.5 to 1.0 mm thick, but if the supporting member is thicker than this, the diamond sintered layer will be partially exposed, as shown in Figure 2 (b) explained earlier. This is because there is a possibility that this support member may actually be in a state of obstructing the outflow of small pieces of excavated rock.
又、中間接合層を有する場合は、この中間接合
層はダイヤモンド焼結体層と支持部材を強固に接
合するのが目的であるため、通常0.5mm以下で充
分であり、これ以上の厚みは不必要で不経済であ
る。以下、本発明の実施例を第３図を参照して以
下に説明する。 In addition, when an intermediate bonding layer is provided, the purpose of this intermediate bonding layer is to firmly bond the diamond sintered compact layer and the supporting member, so a thickness of 0.5 mm or less is usually sufficient, and a thickness greater than this is not acceptable. Necessary and uneconomical. Hereinafter, embodiments of the present invention will be described below with reference to FIG.
実施例 １
第３図は本発明に基づく第１の実施例で、厚さ
２mmのWC−10％Co超硬合金支持部材６上に厚さ
0.5mmのダイヤモンド焼結体７、さらにその上に
厚さ0.3mmのWC−10％Co超硬合金支持部材８が
結合した複合ダイヤモンド焼結体９がビツト本体
１０に固着されている。Embodiment 1 FIG. 3 shows a first embodiment based on the present invention.
A composite diamond sintered body 9 comprising a 0.5 mm diamond sintered body 7 and a 0.3 mm thick WC-10% Co cemented carbide support member 8 bonded thereon is fixed to the bit body 10.
これと比較のため、厚さ２mmのWC−10％Co超
硬合金上に厚さ0.5mmのダイヤモンド焼結体を固
着した同一形状のビツトも作成した。このビツト
を用い圧縮強度1400Kg/mm2の安山岩のドリル試験
を行つた。回転数は140rpm、ドリル穿孔速度は
10cm/min、水使用の条件である。この結果本発
明ビツトは30分のドリリング後継続使用可の状態
であつたのに対し、比較用ビツトは２分のドリリ
ングでダイヤモンド焼結体部が大破し、使用不能
となつた。 For comparison, a bit of the same shape was also made by fixing a 0.5 mm thick diamond sintered body onto a 2 mm thick WC-10% Co cemented carbide. Using this bit, we conducted a drill test on andesite with a compressive strength of 1400Kg/mm 2 . The rotation speed is 140 rpm, and the drilling speed is
10cm/min, water usage condition. As a result, the bit of the present invention remained usable after 30 minutes of drilling, whereas the comparative bit suffered severe damage to the diamond sintered body portion after 2 minutes of drilling, making it unusable.
実施例 ２
第２の実施例はやはり第３図に示したものと同
一形状のもので、厚さ２mmのWC−15％Co超硬合
金支持部材上に厚さ0.5mmのダイヤモンド焼結体
層、更にその上に厚さ0.2mmのモリブデン層が形
成され、かつ、超硬合金支持部材、モリブデン各
層とダイヤモンド焼結体層との界面に厚さ0.05mm
で、60容量％のCBNをTiN−20重量％Alの結合剤
で結合した中間接合層を介して結合された複合ダ
イヤモンド焼結体を刃先に固着したドリルビツト
である。この場合もやはり比較のため厚さ２mmの
WC−15％Co超硬合金支持部材上に厚さ0.5mmの
ダイヤモンド焼結体層が形成された複合ダイヤモ
ンド焼結体を刃先に固着した同一形状のドリルビ
ツトも作成した。Example 2 The second example has the same shape as shown in FIG. 3, with a 0.5 mm thick diamond sintered body layer on a 2 mm thick WC-15% Co cemented carbide support member. Furthermore, a molybdenum layer with a thickness of 0.2 mm is formed on it, and a layer with a thickness of 0.05 mm is formed on the interface between the cemented carbide support member, each molybdenum layer and the diamond sintered body layer.
This is a drill bit with a composite diamond sintered body bonded to the cutting edge via an intermediate bonding layer in which 60% by volume CBN is bonded with a binder of TiN and 20% by weight Al. In this case, for comparison, a 2 mm thick
A drill bit with the same shape was also created, in which a composite diamond sintered body, in which a 0.5 mm thick diamond sintered body layer was formed on a WC-15%Co cemented carbide support member, was fixed to the cutting edge.
これらのドリルビツトを用い圧縮強度1800Kg/
cm2の花崗岩のドリル試験を行つた。試験条件は第
１の実施例と同じである。 Using these drill bits, compressive strength of 1800Kg/
cm 2 granite drill test was carried out. The test conditions are the same as in the first example.
この結果、比較用ビツトはわずか１分のドリリ
ングでダイヤモンド焼結体部が大破し、使用不能
となつたのに対し、本発明ビツトは20分のドリリ
ング後も継続使用可の状態であつた。 As a result, the diamond sintered body of the comparative bit was severely damaged after just one minute of drilling, and the bit became unusable, whereas the bit of the present invention remained usable even after 20 minutes of drilling.
第１図は従来の掘削ビツト用複合ダイヤモンド
焼結体の外観図、第２図は本発明の掘削ビツトの
刃先部の外観図、第３図は本発明の掘削ビツトの
実施例を示す上面図イと正面図ロである。
１，７：ダイヤモンド焼結体、２，６：下部支
持部材、３，８：上部支持部材、４，１０：ビツ
ト本体、５，９：複合ダイヤモンド焼結体、１
１：切刃。
Fig. 1 is an external view of a conventional composite diamond sintered body for a drilling bit, Fig. 2 is an external view of the cutting edge of the drilling bit of the present invention, and Fig. 3 is a top view showing an embodiment of the drilling bit of the present invention. A and front view B. 1, 7: Diamond sintered body, 2, 6: Lower support member, 3, 8: Upper support member, 4, 10: Bit body, 5, 9: Composite diamond sintered body, 1
1: Cutting blade.
Claims (1)
ド焼結体と該ダイヤモンド焼結体の上下両面全面
に支持部材が直接にあるいは中間接合層を介して
結合されている複合ダイヤモンド焼結体をビツト
本体に鑞付け、圧入等の方法により埋め込み固着
された上記複合ダイヤモンド焼結体を刃先として
使用することを特徴とする掘削ビツト。 ２ 複合ダイヤモンド焼結体の両方の支持部材が
周期律表ａ、ａ、ａ族元素の炭化物、ある
いはこれらの相互固溶体炭化物を鉄族金属で結合
した超硬合金であることを特徴とする特許請求の
範囲第１項の掘削ビツト。 ３ 複合ダイヤモンド焼結体の両方の支持部材が
周期律表ａ、ａ、ａ族金属、Mn、Fe、
Co、Ni、Cuまたはこれらの合金であることを特
徴とする特許請求の範囲第１項記載の掘削ビツ
ト。 ４ 複合ダイヤモンド焼結体の支持部材のうち、
一方が、周期律表ａ、ａ、ａ族元素の炭化
物あるいはこれらの相互固溶体炭化物を鉄族金属
で結合した超硬合金であり、他方が周期律表
ａ、ａ、ａ族の金属、Mn、Fe、Co、Ni、
Cuまたはこれらの合金であることを特徴とする
特許請求の範囲第１項記載の掘削ビツト。 ５ 複合ダイヤモンド焼結体の支持部材のうち一
方の厚みがダイヤモンド焼結体層の厚みよりも小
であることを特徴とする特許請求の範囲第１項乃
至第４項記載の掘削ビツト。 ６ 特許請求の範囲第１〜第５項に記載した掘削
ビツトにおいて、複合ダイヤモンド焼結体の中央
のダイヤモンド焼結体と支持部材との一方又は両
方の界面に中間接合層を有し、かつ該中間接合層
が、70容量％未満の立方晶型窒化硼素と残部が周
期律表ａ族のTi、Zr、Hfの炭化物、窒化物、
炭窒化物、あるいは硼化物の一種もしくはこれら
の混合物、相互固溶体化合物を主体とし、これに
Alおよび／またはSiを0.1重量％以上含有するこ
とを特徴とする掘削ビツト。 ７ 複合ダイヤモンド焼結体のダイヤモンド焼結
体と支持部材との間の中間接合層の厚みが0.5mm
以下であることを特徴とする特許請求の範囲第６
項記載の掘削ビツト。[Claims] 1. A composite diamond sintered body comprising a diamond sintered body containing 60% by volume or more of diamond, and supporting members bonded to the entire upper and lower surfaces of the diamond sintered body directly or via an intermediate bonding layer. An excavation bit characterized in that the above-mentioned composite diamond sintered body is embedded and fixed into the bit body by a method such as brazing or press-fitting, and is used as a cutting edge. 2. A patent claim characterized in that both supporting members of the composite diamond sintered body are carbides of elements in group a, Excavation bit of the first term in the range. 3 Both supporting members of the composite diamond sintered body are metals of group a, a, group a of the periodic table, Mn, Fe,
The drilling bit according to claim 1, characterized in that it is made of Co, Ni, Cu or an alloy thereof. 4 Among the supporting members of the composite diamond sintered body,
One is a cemented carbide made of carbides of elements in groups a, a, and a of the periodic table or their mutual solid solution carbides combined with iron group metals, and the other is a carbide of metals in groups a, a, and a of the periodic table, Mn, Fe, Co, Ni,
The drilling bit according to claim 1, characterized in that it is made of Cu or an alloy thereof. 5. The drilling bit according to claim 1, wherein the thickness of one of the supporting members of the composite diamond sintered body is smaller than the thickness of the diamond sintered body layer. 6. The drilling bit according to claims 1 to 5, which has an intermediate bonding layer at one or both interfaces between the central diamond sintered body and the support member of the composite diamond sintered body, and The intermediate bonding layer is made of less than 70% by volume of cubic boron nitride and the remainder is carbide or nitride of Ti, Zr, or Hf from group a of the periodic table.
Mainly carbonitrides, borides, or mixtures thereof, mutual solid solution compounds;
A drilling bit characterized by containing 0.1% by weight or more of Al and/or Si. 7 The thickness of the intermediate bonding layer between the diamond sintered body and the support member of the composite diamond sintered body is 0.5 mm.
Claim 6 is characterized in that:
Drilling bit as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14008881A JPS5841180A (en) | 1981-09-04 | 1981-09-04 | Drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14008881A JPS5841180A (en) | 1981-09-04 | 1981-09-04 | Drilling bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5841180A JPS5841180A (en) | 1983-03-10 |
| JPS6156749B2 true JPS6156749B2 (en) | 1986-12-03 |
Family
ID=15260670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14008881A Granted JPS5841180A (en) | 1981-09-04 | 1981-09-04 | Drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5841180A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117392A (en) * | 1984-11-13 | 1986-06-04 | 工業技術院長 | Blade chip material of drilling bit |
| AU2007359121B2 (en) * | 2007-09-18 | 2015-05-07 | Caterpillar Global Mining Europe Gmbh | Roller drill or roller bit |
-
1981
- 1981-09-04 JP JP14008881A patent/JPS5841180A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5841180A (en) | 1983-03-10 |
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