发明名称 |
Tip for degradation tool and tool comprising same |
摘要 |
A tip for a degradation tool, the tip comprising a PCD structure (20) joined to a cemented carbide substrate (30); the PCD structure comprising a plurality of strata (24, 25) arranged so that adjacent strata have alternating compressive and tensile stress states, adjacent strata comprising different PCD grades and being directly bonded to each other by inter-growth of diamond grains; each stratum having a mean thickness of at most 500 microns; the PCD structure defining a working end including a rounded conical apex (22) having a radius of curvature of 1.3 mm to 4 mm. |
申请公布号 |
US9249662(B2) |
申请公布日期 |
2016.02.02 |
申请号 |
US201214114876 |
申请日期 |
2012.05.09 |
申请人 |
Element Six Abrasives S.A. |
发明人 |
Jonker Cornelis Roelof;Bowes David Christian;Shabalala Thembinkosi;Can Nedret |
分类号 |
E21C35/183;E21B10/567;E21C35/18 |
主分类号 |
E21C35/183 |
代理机构 |
Kilpatrick Townsend & Stocton LLP |
代理人 |
Russell Dean W.;Weight Clark F.;Kilpatrick Townsend & Stocton LLP |
主权项 |
1. A tip for a degradation tool, the tip comprising a PCD structure joined to a cemented carbide substrate; the PCD structure comprising a plurality of strata arranged so that adjacent strata have alternating compressive and tensile stress states, adjacent strata comprising different PCD grades and being directly bonded to each other by inter-growth of diamond grains to form an integral, solid and stratified PCD structure comprising different, alternating amounts of metal catalyst for diamond; each stratum having a mean thickness of at most 500 microns; the PCD structure defining a working end including a rounded conical apex. |
地址 |
Luxembourg LU |