Rock bit with cobalt alloy cemented tungsten carbide inserts
    31.
    发明授权
    Rock bit with cobalt alloy cemented tungsten carbide inserts 失效
    岩石钻头采用钴合金硬质合金碳化钨刀片

    公开(公告)号:US5305840A

    公开(公告)日:1994-04-26

    申请号:US944430

    申请日:1992-09-14

    IPC分类号: C22C29/08 E21B10/52 E21B10/00

    CPC分类号: E21B10/52 C22C29/08

    摘要: A rock bit employs cemented tungsten carbide inserts for engaging a rock formation for drilling oil wells or the like. The cemented tungsten carbide inserts have as a binder phase a cobalt base alloy including from 10 to 35% by weight nickel, from 3 to 10% by weight chromium, from 1 to 6% by weight of molybdenum, and a balance primarily of cobalt. A particularly preferred composition has 6% by weight chromium, 17% by weight nickel, 4% by weight molybdenum and a balance of cobalt. Wear resistance is enhanced without loss of toughness in the inserts.

    摘要翻译: 岩石钻头采用水泥碳化钨刀片,用于接合用于钻井油井等的岩层。 粘结碳化钨刀片具有作为粘结相的钴基合金,其包含10至35重量%的镍,3至10重量%的铬,1至6重量%的钼,余量主要为钴。 特别优选的组合物具有6重量%的铬,17重量%的镍,4重量%的钼和余量的钴。 增加耐磨性,而不会损失刀片的韧性。