Diamond cutting tool and method of manufacturing the same

Details Diamond cutting tool and method of manufacturing the same Diamond cutting tool and method of manufacturing the same

1994-10-05

1996-10-22

Turner, Archene

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

51307, 51309, 428141, 428148, 428457, B24D 300

Patent

active

055675220

ABSTRACT:
A diamond cutting tool has a rake face (5) of a cutting edge member (2) consisting essentially of a (111) plane of diamond. The cutting edge member (2) of diamond is vapor-deposited by CVD or the like on an independently prepared base material. In this vapor deposition, the diamond is deposited while controlling and periodically varying the carbon to hydrogen ratio of the supplied raw material gas, in such a manner that a (111) crystal plane is oriented with a prescribed fluctuation or non-uniformity, but is substantially parallel to the base material surface. The as-formed diamond material is separated from the base material and cut into a desired shape, and then bonded as a cutting edge member (2) to a tool base (1) through a metallization layer (4) and a brazing layer (3), in such an orientation that the (111) plane defines the rake face (5). The tool having such a rake face (5) consisting essentially of the (111) plane, with a prescribed fluctuation of its orientation, is excellent in wear resistance and is resistant to cleavage damage.

REFERENCES:
patent: 5178645 (1993-01-01), Nakamura et al.

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