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公开(公告)号:US4944774A
公开(公告)日:1990-07-31
申请号:US329251
申请日:1989-03-27
申请人: Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
发明人: Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
CPC分类号: B23K35/327 , C22C29/08 , E21B10/50
摘要: A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 80 mesh single crystal monotungsten carbide.
摘要翻译: 研磨的牙齿钻头上的牙齿的硬面包含至少65重量%的碳化钨颗粒和将碳化物颗粒结合在一起的钢板和岩石钻头的切割锥的混合物的混合物。 碳化钨颗粒混合物包含35%至80%,优选65%至80%重量的20至30目的硬质合金碳化钨,和20%至65%,优选20%至35%重量 40至80目单晶单晶碳化钨。
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公开(公告)号:US4836307A
公开(公告)日:1989-06-06
申请号:US139602
申请日:1987-12-29
申请人: Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
发明人: Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
CPC分类号: E21B10/50 , B23K35/327 , C22C29/08 , Y10T428/1209
摘要: A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 89 mesh single crystal monotungsten carbide.
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