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11. 发明申请

WO1997009174A1 METHOD FOR FORMING A POLYCRYSTALLINE LAYER OF ULTRA HARD MATERIAL 审中-公开
标题翻译：形成超硬材料多晶层的方法
公开(公告)号：WO1997009174A1
公开(公告)日：1997-03-13
申请号：PCT/US1996014476
申请日：1996-09-09
申请人： SMITH INTERNATIONAL, INC.
发明人： SMITH INTERNATIONAL, INC. , ANDERSON, Nathan, R. , EYRE, Ronald, K. , KESHAVAN, Madapusi, K. , RAI, Ghanshyam
IPC分类号： B32B31/20
CPC分类号： B24D18/0009 , B24D3/06 , B24D3/28 , Y10S76/11 , Y10S76/12 , Y10T156/1067 , Y10T156/1075
摘要： A polycrystalline diamond layer (27) is bonded to a cemented metal carbide substrate (21) by this process. A layer of dense high shear compaction material (27) including diamond or cubic boron nitride particles is placed adjacent to a metal carbide substrate (21). The particles of diamond have become rounded instead of angular due to high shear compaction in a multiple roller process. The volatiles in the high shear compaction material are removed and binder decomposed at high temperature, for example, 950 DEG C, leaving residual amorphous carbon or graphite in a layer of ultra hard material particles on the carbide substrate. The substrate and layer assembly is then subjected to a high pressure, high temperature process, thereby sintering the ultra hard particles to each other to form a polycrystalline ultra hard layer (27) bonded to the metal carbide substrate (21). The layer of high shear compaction material is also characterized by a particle size distribution including larger and smaller particles that are distributed uniformly throughout the layer.
摘要翻译：通过该工艺将多晶金刚石层（27）结合到胶结金属碳化物基体（21）上。将包括金刚石或立方氮化硼颗粒的致密高剪切压实材料（27）放置在与金属碳化物基体（21）相邻的位置。由于多辊工艺中的高剪切压实，金刚石颗粒已经变圆而不是角度。除去高剪切压实材料中的挥发物，并在高温下（例如950℃）分解粘结剂，在碳化物基体上留下残留的无定形碳或石墨的超硬材料颗粒层。然后将基板和层组件进行高压高温处理，从而将超硬颗粒相互烧结，形成结合到金属碳化物基体（21）上的多晶超硬层（27）。高剪切压实材料层的特征还在于粒度分布包括均匀分布在整个层中的越来越小的颗粒。

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