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    • 6. 发明授权
    • Drill bit
    • 钻头
    • US4365679A
    • 1982-12-28
    • US212068
    • 1980-12-02
    • Hans B. van NederveenMartin B. Verburgh
    • Hans B. van NederveenMartin B. Verburgh
    • B22F3/24B22F7/06C23C4/02E21B10/22E21B10/50B21K5/02
    • B22F3/24B22F7/06C23C4/02E21B10/22E21B10/50B22F2998/10
    • A drill bit with cutting teeth for drilling in rock comprising:a core member having raceways for rolling elements for rotation of the drill bit,a supporting layer exteriorly shaped to define cutting teeth and formed of highly compacted sintered powder material of substantially 90% density, isostatically bonded to said core member,a wear resistant layer applied by thermal spraying and covering only the portions of the cutting teeth which upon drilling directly contact the rock,said wear resistant layer and said supporting layer being isostatically compacted hot which combined are of substantially 99% density,said layers having a solid bond therebetween providing a drill bit of superior mechanical properties including high resistance to wear and chipping.
    • 一种具有用于在岩石中钻孔的切割齿的钻头,包括:具有用于滚动元件的用于旋转钻头的滚道的芯构件,外部形状以限定切割齿的支撑层,并由密实度为90%的高度压实的烧结粉末材料形成, 均匀地结合到所述芯构件上,通过热喷涂施加的耐磨层并且仅覆盖在钻孔时直接接触岩石的所述切削齿的部分,所述耐磨层和所述支撑层被均压成热,其组合为基本上为99 %密度,所述层之间具有固体粘合,提供具有优异机械性能的钻头,包括高耐磨性和切屑。