Diamond-coated hard material and a process for the...

Details Diamond-coated hard material and a process for the... Diamond-coated hard material and a process for the...

C - Chemistry, Metallurgy

04

B

C04B 41/85 (2006.01) C22C 1/05 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2091991

ABSTRACT This invention relates to a diamond-coated hard material and a process for the production of the same. The feature of the diamond-coated hard ma- terial consists in that in a diamond-coated hard material comprising a substrate of a tungsten carbide-based cemented carbide having a diamond-coated layer provided on the surface of the substrate, a surface-modified layer containing no binder phase or conatining a binder phase in a proportion of less than in the interior part of the substrate is present on the outermost surface of the substrate. This hard material can be produced by converting the substrate material into a sintered or heat treated surface or skin and then caoting with diamond. The diamond-coated hard material of the present invention has such a high wear resistance and excellent bonding strength to the substrate that it can favorably be applied to various tools, parts, grinding wheels, etc. - 4 2 -

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