发明名称 |
Cutting elements formed from ultra hard materials having an enhanced construction |
摘要 |
Cutting elements of this invention include an ultra hard body joined with a metallic substrate. The body includes an uppermost layer comprising a plurality of bonded ultra hard crystals and interstitial regions, and that defines a body working surface. The uppermost layer includes an outer region that is relatively more thermally stable than a remaining portion of the uppermost layer. The body further includes an intermediate layer joined to the uppermost layer, comprising a plurality of bonded ultra hard crystals, and having a wear resistance less than that of the uppermost layer remaining region. The body may additionally include a lowermost PCD layer that is interposed between and attached to the intermediate layer and the substrate. |
申请公布号 |
GB2422394(B) |
申请公布日期 |
2010.04.28 |
申请号 |
GB20060001440 |
申请日期 |
2006.01.25 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
JOHN DANIEL BELNAP;STEWART MIDDLEMISS |
分类号 |
E21B10/567;C22C26/00;E21B10/46;E21B10/52 |
主分类号 |
E21B10/567 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|