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公开(公告)号：EP2707566B1
公开(公告)日：2019-03-06
申请号：EP12719403.3
申请日：2012-05-09
IPC分类号： E01C23/06 , E21B10/567 , E21C35/183
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公开(公告)号：EP2707566A2
公开(公告)日：2014-03-19
申请号：EP12719403.3
申请日：2012-05-09
IPC分类号： E21B10/567 , E21C35/183
CPC分类号： E21C35/183 , B01J3/062 , B01J2203/062 , B01J2203/0655 , B01J2203/068 , B01J2203/0685 , B25D17/02 , B25D2222/09 , B25D2222/72 , E21B10/567 , E21B10/5673 , E21C2035/1813 , E21C2035/1816
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.
摘要翻译： 一种降解沥青或岩石的挖掘工具，包括一个PCD元件; 所述PCD元件包括在界面处结合到硬质合金支撑体的PCD结构; 所述PCD结构包括第一区域和与所述第一区域相邻的第二区域，所述第二区域通过金刚石颗粒的共生而结合到所述第一区域; 所述第一区域包括多个交替的地层，每个地层的厚度在约30至300微米的范围内; 所述第二区域包括多个地层，所述第二区域中的一个或多个地层的厚度大于所述第一地区中的单独地层的厚度，其中所述第一地区中的所述交替地层包括与第二地层交替的第一地层，所述 第一层处于残余压应力状态，第二层处于残余拉应力状态。
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公开(公告)号：EP2659013A1
公开(公告)日：2013-11-06
申请号：EP11811538.5
申请日：2011-12-20
摘要： A superhard structure comprises a body of polycrystalline superhard material comprising a first region and a second region. The second region is adjacent an exposed surface of the superhard structure and comprises a diamond material or cubic boron nitride with a density greater than 3.4×103 kilograms per cubic metre when the second region comprises diamond material. The material(s) forming the first and second regions have a difference in coefficient of thermal expansion, the first and second regions being arranged such that this difference induces compression in the second region adjacent the exposed surface. The first/a further region has the highest coefficient of thermal expansion of the polycrystalline body and is separated in part from a peripheral free surface of the body by the second region or one or more further regions formed of a material(s) of a lower coefficient of thermal expansion. The regions comprise a plurality of grains of polycrystalline superhard material. The second region is peripherally discontinuous with a gap therein through which a portion of the region formed of the material of highest coefficient of thermal expansion extends to the free surface of the superhard structure. There is also disclosed a method for making such a structure.
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公开(公告)号：EP2658667A1
公开(公告)日：2013-11-06
申请号：EP11808197.5
申请日：2011-12-20
CPC分类号： C22C26/00 , B22F7/062 , B24D18/0009 , C22C2026/007 , E21B10/567 , Y10T428/24942
摘要： A superhard structure comprises a body of polycrystalline superhard material comprising a first region and a second region, the second region being adjacent an exposed surface of the superhard structure, the second region comprising a diamond material or cubic boron nitride, the density of the second region being greater than 3.4x103 kilograms per cubic metre when the second region comprises diamond material. The material(s) forming the first and second regions have a difference in coefficient of thermal expansion, the first and second regions being arranged such that this difference induces compression in the second region adjacent the exposed surface. The first/a further region has the highest coefficient of thermal expansion of the polycrystalline body and is separated from a peripheral free surface of the body of polycrystalline superhard material by the second region or one or more further regions formed of a material or materials of a lower coefficient of thermal expansion. The regions comprise a plurality of grains of polycrystalline superhard material. There is also disclosed a method of making such a material.
摘要翻译： 超硬结构包括具有第一区域和第二区域的多晶超硬材料主体，第二区域与超硬结构的暴露表面相邻，第二区域包含金刚石材料或立方氮化硼，第二区域的密度 当第二区域包含金刚石材料时大于3.4×103千克/立方米。 形成第一区域和第二区域的材料具有热膨胀系数的差异，第一区域和第二区域被布置为使得该差异在邻近暴露表面的第二区域中引起压缩。 第一个/另一个区域具有多晶体的最高热膨胀系数，并且通过第二区域或多个另外的区域与多晶超硬材料主体的周边自由表面分离，所述另一个区域由一种或多种 较低的热膨胀系数。 这些区域包含多个多晶超硬材料晶粒。 还公开了制造这种材料的方法。
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