Polycrystalline diamond compact comprising cemented carbide substrate with cementing constituent concentration gradient
    14.
    发明授权
    Polycrystalline diamond compact comprising cemented carbide substrate with cementing constituent concentration gradient 有权
    包括具有固结成分浓度梯度的硬质合金基体的多晶金刚石复合体

    公开(公告)号:US09512681B1

    公开(公告)日:2016-12-06

    申请号:US14081960

    申请日:2013-11-15

    CPC classification number: E21B10/42 E21B10/567 E21B10/573

    Abstract: In an embodiment, a polycrystalline diamond compact includes a cemented carbide substrate including a carbide constituent cemented with a cementing constituent. The cementing constituent has a non-homogenous concentration within the substrate that includes a substantially continuous gradient. A first portion (e.g. at or near a center) of the substrate has a concentration of the cementing constituent that differs from a concentration of the cementing constituent at a second portion (e.g., at or near an outer surface) of the substrate. Thus, the concentration gradient exhibits a substantially smooth gradient, with increasing distance from the first portion of the substrate towards the second portion of the substrate. This provides the substrate with relatively higher wear resistance in one region (e.g., at or near the outer surface) and relatively higher toughness in another region (e.g., at or near the center).

    Abstract translation: 在一个实施例中,多晶金刚石复合体包括硬质合金基底,其包括用固结剂组分胶合的碳化物组分。 固化组分在基材内具有不均匀的浓度,其包括基本上连续的梯度。 衬底的第一部分(例如在中心处或附近)具有与基底的第二部分(例如,在外表面处或附近的)处的固着部件的浓度不同的粘结成分的浓度。 因此,浓度梯度表现出基本上平滑的梯度,随着距衬底的第一部分朝向衬底的第二部分的距离的增加。 这提供了在一个区域(例如,在外表面处或附近)处具有相对更高的耐磨性和在另一区域(例如在中心附近或附近)具有相对较高韧性的基底。

    METHODS OF FABRICATING A POLYCRYSTALLINE DIAMOND COMPACT
    16.
    发明申请
    METHODS OF FABRICATING A POLYCRYSTALLINE DIAMOND COMPACT 审中-公开
    制造多晶金刚石紧凑件的方法

    公开(公告)号:US20130205677A1

    公开(公告)日:2013-08-15

    申请号:US13789099

    申请日:2013-03-07

    Abstract: In an embodiment, a method of fabricating a polycrystalline diamond compact is disclosed. The method includes sintering a plurality of diamond particles in the presence of a metal-solvent catalyst to form a polycrystalline diamond body; leaching the polycrystalline diamond body to at least partially remove the metal-solvent catalyst therefrom, thereby forming an at least partially leached polycrystalline diamond body; and subjecting an assembly of the at least partially leached polycrystalline diamond body and a cemented carbide substrate to a high-pressure/high-temperature process at a pressure to infiltrate the at least partially leached polycrystalline diamond body with an infiltrant. The pressure of the high-pressure/high-temperature process is less than that employed in the act of sintering of the plurality of diamond particles.

    Abstract translation: 在一个实施例中,公开了一种制造多晶金刚石致密体的方法。 该方法包括在金属 - 溶剂催化剂的存在下烧结多个金刚石颗粒以形成多晶金刚石体; 浸出多晶金刚石体至少部分地从其中去除金属 - 溶剂催化剂,从而形成至少部分浸出的多晶金刚石体; 以及使所述至少部分浸出的多晶金刚石体和硬质合金基底的组件在压力下经受高压/高温过程,以浸润剂渗透至少部分浸出的多晶金刚石体。 高压/高温过程的压力小于在多个金刚石颗粒的烧结过程中使用的压力。

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