Diamond tools for rock drilling, metal cutting and wear part applications
AssigneesSandvik AB, Diamant Boart Stratabit S.A.
InventorsMats G. Waldenstrom, Udo K. R. Fisher, Lars H. Hillert, Mahlon D. Dennis
Life of this patent
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Abstract
The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in the diamond stable area. The bodies of cemented carbide may have a uniform structure or a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.
Claims8
A composite body for rock drilling, rock cutting, metal cutting or wear part applications comprising a diamond portion bonded to a cemented carbide substrate wherein said diamond portion is formed onto the cemented carbide substrate by a CVD- or PVD-technique such that the diamond portion is in direct contact with the cemented carbide substrate and subsequently bonded to the cemented carbide substrate by high pressure and high temperature, the high pressure and high temperature resulting in a high and uniform compression of the diamond portion caused by the difference in thermal expansion between the cemented carbide substrate and the diamond portion.
Dependencies are inferred from the claim text.