JP2014528028A - 超硬質構造物及びそれを製造する方法 - Google Patents
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Abstract
Description
岩石穿孔ドリル用のPCDインサートは、下で述べるようにして製造する。
岩石穿孔ドリル用のPCDインサートを下記のようにして製造した。
本明細書において使用する、「超硬質」は、少なくとも25ギガパスカルのビッカース硬度を意味する。合成及び天然ダイヤモンド、多結晶ダイヤモンド(PCD)、立方晶窒化ホウ素(cBN)及び多結晶cBN(PCBN)材料は、超硬質材料の例である。いわゆる人造ダイヤモンドである合成ダイヤモンドは、作製されたダイヤモンド材料である。
20 PCDの構造物(第2の構造物)
30 固められた炭化物基質(第1の構造物)、基質
40 結合剤の薄い層又は膜
Claims (27)
- 超硬質構造物を製造する方法であって、
第2の構造物と結合した第1の構造物を含み、前記第1の構造物が、第1の熱膨張係数(CTE)及び第1のヤング率を有する第1の材料を含み、前記第2の構造物が、第2のCTE及び第2のヤング率を有する第2の材料を含み、第1のCTEと第2のCTEは互いに実質的に異なり、且つ第1のヤング率と第2のヤング率は互いに実質的に異なり、第1の材料又は第2の材料の少なくとも1つが超硬質材料を含み、
第1の材料と、第2の材料と、第1の材料と第2の材料とを結合して一緒にすることができるように配列された金属を含む結合剤と、を含む集成材を形成する工程と、
前記集成材を、前記結合剤が液状であるのに十分な高い温度に加熱して、前記超硬質材料が熱力学的に安定である第1の圧力に加圧する工程と、
圧力を、前記超硬質材料が熱力学的に安定である第2の圧力に下げ、温度を、前記結合剤を液状に維持するのに十分高く保つ工程と、
温度を下げて前記結合剤を固化させる工程と、
圧力及び温度を環境条件に下げて、超硬質構造物を提供する工程と、
を含む、方法。 - 第1の材料又は第2の材料の一方のCTEが、約25℃で、少なくとも1℃当たり約2.5×10−6及び最大で1℃当たり約5.0×10−6であり、第1の材料又は第2の材料の他方のCTEが、少なくとも1℃当たり約3.5×10−6及び最大で1℃当たり約6.5×10−6である、請求項1に記載の方法。
- 第1の材料又は第2の材料の一方のヤング率が、少なくとも約500ギガパスカル及び最大で約1,300ギガパスカルであり、第1の材料及び第2の材料の他方のヤング率が少なくとも約800ギガパスカル及び最大で約1,600ギガパスカルである、請求項1又は請求項2に記載の方法。
- 第1の材料と第2の材料のヤング率が、少なくとも約10%異なる、請求項1〜3のいずれか一項に記載の方法。
- 第1の材料と第2の材料のCTEが、少なくとも約10%異なる、請求項1〜4のいずれか一項に記載の方法。
- 前記超硬質材料の多数の粒の集合体を、焼結触媒材料の存在下で焼結圧力及び焼結温度で焼結して第2の構造物を形成する工程を含む、請求項1〜5のいずれか一項に記載の方法。
- 前記超硬質材料の粒の集合体を前記結合剤の存在下に第1の構造物に隣接して配置して、焼結前集成材を形成する工程と、
前記焼結前集成材を焼結圧力に加圧し及び焼結温度に加熱して、前記結合剤を溶融させる工程と、
前記超硬質材料の粒を焼結して、溶融した状態にある前記結合剤により第1の構造物に結合した多結晶超硬質材料を含む第2の構造物を形成させる工程と、
を含む、請求項1〜6のいずれか一項に記載の方法。 - 第1の圧力が実質的に焼結圧力である、請求項6又は請求項7に記載の方法。
- 第1の構造物を提供する工程と、多結晶超硬質材料を含む第2の構造物を提供する工程と、第1の構造物を第2の構造物に隣接して配置する工程、及び予備構造物の集成材を形成する工程と、圧力を予備構造物集成材にかける工程、圧力を常圧から第1の圧力に上げる工程とを含む、請求項1〜8のいずれか一項に記載の方法。
- 前記超硬質材料の多数の粒の集合体に、前記超硬質材料が焼結され得る焼結圧力をかけ焼結温度に加熱して第2の材料を形成する工程と、圧力及び温度を環境条件に下げて第2の構造物を提供する工程とを含み、第1の圧力が、実質的に焼結圧力を超える、請求項9に記載の方法。
- 第2の構造物がダイヤモンド材料を含み、前記結合剤がダイヤモンドのための触媒材料を含む、請求項1〜10のいずれか一項に記載の方法。
- 第1の構造物及び第2の構造物がそれぞれ、ダイヤモンド材料を含み、前記結合剤がダイヤモンドのための触媒材料を含む、請求項1〜11のいずれか一項に記載の方法。
- 第2の圧力と第1の圧力との差が、少なくとも約0.5ギガパスカルである、請求項1〜12のいずれか一項に記載の方法。
- 前記超硬質構造物を、前記超硬質材料が熱力学的に準安定である処理温度及び処理圧力でさらに熱処理することを含む、請求項1〜13のいずれか一項に記載の方法。
- 前記超硬質材料がダイヤモンド材料を含み、処理温度が少なくとも約500℃であり、処理圧力が約1ギガパスカル未満である、請求項14に記載の方法。
- 待ち時間の間に圧力を第1の圧力から中間圧力に下げ、次にさらに圧力を中間圧力から第2の圧力に下げる工程を含む、請求項1〜15のいずれか一項に記載の方法。
- 第1の圧力が少なくとも約7ギガパスカルであり、前記中間圧力が少なくとも約5.5ギガパスカル且つ約10ギガパスカル未満であり、前記待ち時間が少なくとも約1分であり、第2の圧力が少なくとも約5.5ギガパスカル且つ最大で約7ギガパスカルである、請求項16に記載の方法。
- 前記超硬質構造物を加工して工具部材を提供する工程を含む、請求項1〜17のいずれか一項に記載の方法。
- 前記超硬質構造物が、岩石穿孔ドリルのための工具部材として形成される、請求項1〜18のいずれか一項に記載の方法。
- 前記超硬質構造物が、岩石又は舗装を崩壊するための衝撃工具として形成される、請求項1〜19のいずれか一項に記載の方法。
- 前記結合剤が、温度の低下に応じて固化し始める圧力が、実質的に第2の圧力と等しい、請求項1〜20のいずれか一項に記載の方法。
- 前記結合剤が温度の低下に応じて固化し始める圧力が、実質的に第2の圧力未満である、請求項1〜20のいずれか一項に記載の方法。
- 第1の構造物が、コバルトで固められた炭化タングステン材料を含み、第2の材料がPCD材料を含み、固められた炭化物材料のCTEが、1℃当たり約4.5×10−6〜約6.5×10−6の範囲内にあり、PCD材料のCTEが、1℃当たり約3.0×10−6〜約5.0×10−6の範囲内にあり;固められた炭化物材料のヤング率が、約500〜約1,000ギガパスカルの範囲内で、PCD材料のヤング率が、約800〜約1,600ギガパスカルの範囲内にあり;第1の圧力が、約6〜約10ギガパスカルの範囲内にあり、第2の圧力が、約5.5〜約8ギガパスカルの範囲内にある、請求項1〜22のいずれか一項に記載の方法。
- 固められた炭化物材料に含まれた、コバルトを主成分とする結合剤が固化し始める圧力が、第2の圧力と等しい、請求項1〜23のいずれか一項に記載の方法。
- 第2の圧力が、約6.5〜約7.5ギガパスカルの範囲にある、請求項1〜24のいずれか一項に記載の方法。
- 第2の構造物がPCD材料を含み、前記超硬質構造物を、約30〜約90分の範囲内の処理時間で、約550〜約650℃の範囲の処理温度でさらに熱処理する工程を含む、請求項1〜25のいずれか一項に記載の方法。
- 添付図面の図2から7のいずれかを参照する実質的に本明細書に記載された方法。
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GBGB1113391.5A GB201113391D0 (en) | 2011-08-03 | 2011-08-03 | Super-hard construction and method for making same |
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CN103813873A (zh) | 2014-05-21 |
EP2739418A1 (en) | 2014-06-11 |
JP5710841B2 (ja) | 2015-04-30 |
KR101468852B1 (ko) | 2014-12-03 |
RU2014107946A (ru) | 2015-09-10 |
CN103813873B (zh) | 2015-09-09 |
WO2013017642A1 (en) | 2013-02-07 |
GB201113391D0 (en) | 2011-09-21 |
EP2739418B1 (en) | 2019-01-16 |
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US9039798B2 (en) | 2015-05-26 |
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