发明名称 |
Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength |
摘要 |
Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a first portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and a second portion of the interstitial matrix in the body adjacent to the working surface contains the catalyzing material. The first portion of the interstitial matrix and the second portion of the interstitial matrix have substantially the same impact strength.
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申请公布号 |
US6601662(B2) |
申请公布日期 |
2003.08.05 |
申请号 |
US20010947678 |
申请日期 |
2001.09.06 |
申请人 |
GRANT PRIDECO, L.P. |
发明人 |
MATTHIAS TERRY R.;GRIFFIN NIGEL DENNIS;HUGHES PETER RAYMOND |
分类号 |
B22F7/06;B23B27/14;C04B35/52;C04B37/02;C04B41/45;C04B41/53;C04B41/81;C04B41/91;E21B7/06;E21B7/18;E21B10/00;E21B10/42;E21B10/43;E21B10/56;E21B10/567;E21B10/573;E21B10/60;E21B21/10;F16C33/04;(IPC1-7):E21B10/46 |
主分类号 |
B22F7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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