Tools for cutting rock drilling
AssigneesSandvik AB, Diamant Boart Stratabit S.A.
InventorsMats G. Waldenstrom, Udo K. R. Fischer, Lars H. Hillert, Mahlon D. Dennis
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Abstract
The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert is provided with one or more bodies or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area. The body of cemented carbide has a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase and having a low content of cobalt in the surface and a higher content of cobalt next to the eta-phase zone.
Claims11
A rock cutter insert for cutting rock drilling comprising a body of cemented carbide containing diamond and/or cBN bonded at high pressure and high temperature, said insert having a multi-phase structure with a core containing eta-phase surrounded by a surface zone free of eta-phase.
Dependencies are inferred from the claim text.